├── .gitignore
├── Gemfile
├── Gemfile.lock
├── README.markdown
├── config
    └── boot.rb
├── lessons
    ├── lesson01.rb
    └── lesson10_advance.rb
├── resources
    ├── nehe
    │   ├── lesson06
    │   │   └── ruby.png
    │   ├── lesson07
    │   │   └── crate.png
    │   ├── lesson08
    │   │   └── Glass.bmp
    │   ├── lesson09
    │   │   └── Star.bmp
    │   └── lesson10
    │   │   ├── Mud.bmp
    │   │   └── world.json
    └── tj
    │   ├── lesson01
    │       └── earth.png
    │   └── lesson10_advance
    │       ├── brick_wall.jpg
    │       ├── ceiling.jpg
    │       ├── hallway.jpg
    │       ├── small_brick_wall.jpg
    │       ├── tile_floor.jpg
    │       ├── wooden_floor.jpg
    │       └── world.json
└── using_nehe_lessons
    ├── lesson02.rb
    ├── lesson03.rb
    ├── lesson04.rb
    ├── lesson05.rb
    ├── lesson06.rb
    ├── lesson07.rb
    ├── lesson08.rb
    ├── lesson09.rb
    └── lesson10.rb


/.gitignore:
--------------------------------------------------------------------------------
1 | *.DS_Store
2 | 


--------------------------------------------------------------------------------
/Gemfile:
--------------------------------------------------------------------------------
1 | source "https://rubygems.org"
2 | 
3 | gem "gosu", "0.13.2"
4 | gem "opengl", "0.10.0"
5 | gem "ruby-opengl", "0.61.0"
6 | gem "glu", "8.3.0"
7 | gem "glut", "8.3.0"
8 | gem "json", "2.1.0"
9 | 


--------------------------------------------------------------------------------
/Gemfile.lock:
--------------------------------------------------------------------------------
 1 | GEM
 2 |   remote: https://rubygems.org/
 3 |   specs:
 4 |     glu (8.3.0)
 5 |     glut (8.3.0)
 6 |     gosu (0.13.2)
 7 |     json (2.1.0)
 8 |     opengl (0.10.0)
 9 |     ruby-opengl (0.61.0)
10 |       opengl
11 | 
12 | PLATFORMS
13 |   ruby
14 | 
15 | DEPENDENCIES
16 |   glu (= 8.3.0)
17 |   glut (= 8.3.0)
18 |   gosu (= 0.13.2)
19 |   json (= 2.1.0)
20 |   opengl (= 0.10.0)
21 |   ruby-opengl (= 0.61.0)
22 | 
23 | BUNDLED WITH
24 |    1.16.0
25 | 


--------------------------------------------------------------------------------
/README.markdown:
--------------------------------------------------------------------------------
 1 | ## Gosu OpenGl Fun ##
 2 | 
 3 | ### Prerequisites ###
 4 |  * [Gosu](http://www.libgosu.org/)
 5 |  * [ruby-opengl](http://ruby-opengl.rubyforge.org/)
 6 |  * They are managed with [Bundler](http://gembundler.com/)
 7 | 
 8 | ### Info ###
 9 |  * using_nehe_lessons - Dir containing [NeHe](http://nehe.gamedev.net/) tutorials simplified and ported to use ruby, ruby-opengl, gosu
10 |  * lessons - Dir containing tutorials that will help playing around with gosu and opengl
11 |  * modules - As I will go though lessons and exams of open gl code I will start to refactor them into usable modules, engine parts etc
12 | 
13 | ### Installation ###
14 |  * Install gems via `bundle install`
15 |  * Run lessons via `bundle exec ruby <pathtolesson>`
16 | 
17 | ### Implemented so far ###
18 |  * lesson01 - texture loading
19 |  * lesson02 - polygons
20 |  * lesson03 - adding colors
21 |  * lesson04 - rotation animation
22 |  * lesson05 - 3D shapes
23 |  * lesson06 - texture mapping
24 |  * lesson07 - texture filters, lighting and keyboard control
25 |  * lesson08 - texture blending, transparency
26 |  * lesson09 - moving bitmaps in 3D space
27 |  * lesson10 - loading and moving through 3D World


--------------------------------------------------------------------------------
/config/boot.rb:
--------------------------------------------------------------------------------
 1 | require 'rubygems'
 2 | require 'bundler'
 3 | Bundler.require(:default)
 4 | 
 5 | require 'gl'
 6 | require 'glu'
 7 | require 'glut'
 8 | 
 9 | include Gl
10 | include Glu
11 | 


--------------------------------------------------------------------------------
/lessons/lesson01.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../../config/boot', __FILE__)
 2 | 
 3 | class Window < Gosu::Window
 4 |   def initialize
 5 |     super(800, 600, false)
 6 |     self.caption = "Lesson #1 - Texture Loading"
 7 |     texture = Gosu::Image.new(self, "resources/tj/lesson01/earth.png", true)
 8 |     @texture_info = texture.gl_tex_info #helper structure that contains image data
 9 |   end
10 | 
11 |   def update
12 |   end
13 | 
14 |   def draw
15 |     gl do
16 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # clear the screen and the depth buffer
17 | 
18 |       #glMatrixMode(matrix) indicates that following [matrix] is going to get used
19 |       glMatrixMode(GL_PROJECTION) # The projection matrix is responsible for adding perspective to our scene.
20 |       glLoadIdentity # Resets current modelview matrix
21 | 
22 |       # Calculates aspect ratio of the window. Gets perspective  view. 45 is degree viewing angle, (0.1, 100) are ranges how deep can we draw into the screen
23 |       gluPerspective(45.0, width / height, 0.1, 100.0)
24 |       glMatrixMode(GL_MODELVIEW) # The modelview matrix is where object information is stored.
25 |       glLoadIdentity
26 |       # Think 3-d coordinate system (x,y,z). +- on each movies on that axis
27 |       glTranslate(0, 0, -2) # Moving function from the current point by x,y,z change
28 | 
29 |       glEnable(GL_TEXTURE_2D) # enables two-dimensional texturing to perform
30 |       glBindTexture(GL_TEXTURE_2D, @texture_info.tex_name) # bing named texture to a target
31 | 
32 |       glBegin(GL_QUADS) # begin drawing model
33 |         glTexCoord2d(@texture_info.left, @texture_info.top) #sets texture coordinates
34 |         glVertex3d(0, 0, 0) # place a point at (x,y,z) location from the current point
35 |         glTexCoord2d(@texture_info.right, @texture_info.top)
36 |         glVertex3d(0.5, 0, 0)
37 |         glTexCoord2d(@texture_info.right, @texture_info.bottom)
38 |         glVertex3d(0.5, -0.5, 0)
39 |         glTexCoord2d(@texture_info.left, @texture_info.bottom)
40 |         glVertex3d(0, -0.5, 0)
41 |       glEnd
42 |     end
43 |   end
44 | 
45 |   def button_down(id)
46 |     if id == Gosu::KbEscape
47 |       close
48 |     end
49 |   end
50 | end
51 | 
52 | window = Window.new
53 | window.show


--------------------------------------------------------------------------------
/lessons/lesson10_advance.rb:
--------------------------------------------------------------------------------
  1 | # This lesson wants to make sure that nehe/lesson10 is fully understood,
  2 | # certain decisions in nehe/lesson 10 could be argueable: use of the meshes,
  3 | # less than optimal data point map, interesting choice of lighting source
  4 | # coordinates, only 1 type of textures. Here we will create 2 connecting
  5 | # rooms (diagram below) each with its own set of textures. We will only use
  6 | # knowledge learned up and including to lesson10.
  7 | #
  8 | # We will also provide the following movement control:
  9 | #  Up    - move forward
 10 | #  Down  - move back
 11 | #  Left  - turn left
 12 | #  Right - turn right
 13 | #  W     - go up
 14 | #  S     - go down
 15 | #  D     - strafe right
 16 | #  A     - strafe left
 17 | #  Esc   - quit
 18 | #  B     - toggle blending
 19 | #  L     - toggle lights
 20 | #  F     - toggle filters
 21 | #
 22 | #  3D Map
 23 | #  /-------------------\
 24 | #  |                   |
 25 | #  |    stone room     |
 26 | #  |__________   ______|
 27 | #  __________|  |_______
 28 | # |                    |
 29 | # | wood rooom         |
 30 | # \-------------------/
 31 | #
 32 | # Take Home exerises:
 33 | #  * reduce size of textures/increase quality
 34 | #  * modify lighting to go from the center of the ceiling of each floor
 35 | #  * add another room
 36 | require 'gosu'
 37 | require 'json'
 38 | require 'gl'
 39 | require 'glu'
 40 | require 'glut'
 41 | include Gl
 42 | include Glu
 43 | 
 44 | class TjTexture
 45 |   attr_accessor :info, :image
 46 |   def initialize(window, name)
 47 |     @image = Gosu::Image.new("resources/tj/lesson10_advance/#{name}.jpg", {tileable: true})
 48 |     @info = @image.gl_tex_info
 49 |   end
 50 | end
 51 | 
 52 | class TjVertex
 53 |   attr_reader :x, :y, :z, :u, :v
 54 | 
 55 |   def initialize(coords)
 56 |     coords.each do |coordinate, value|
 57 |       instance_variable_set(:"@#{coordinate}", value)
 58 |     end
 59 |   end
 60 | end
 61 | 
 62 | class TjMesh
 63 |   attr_accessor :vertexes
 64 |   def initialize
 65 |     @vertexes = []
 66 |   end
 67 | end
 68 | 
 69 | class Window < Gosu::Window
 70 |   attr_accessor :meshes, :current_filter
 71 | 
 72 |   def initialize
 73 |     super(800, 600, false)
 74 |     self.caption = "Lesson #10 - Loading and moving through 3D World"
 75 |     setup_world
 76 |     init_defaults
 77 |     init_lights
 78 |     init_textures
 79 |   end
 80 | 
 81 |   def setup_world
 82 |     world = JSON.parse(File.read('resources/tj/lesson10_advance/world.json'))
 83 |     @all_meshes = world.inject({}) do |acc, mesh_array|
 84 |       acc[mesh_array.first] = mesh_array.last.map do |vertexes|
 85 |         TjMesh.new.tap do |mesh|
 86 |           vertexes.each do |vertex|
 87 |             mesh.vertexes << TjVertex.new(vertex)
 88 |           end
 89 |         end
 90 |       end
 91 |       acc
 92 |     end
 93 |   end
 94 | 
 95 |   def init_defaults
 96 |     @light_on = false
 97 |     @blending = false
 98 |     @bouncing = @bouncing_angle = 0
 99 |     @x_pos = @look_up_or_down_pos = @y_angle = @look_up_or_down = @y_pos = @z_pos = 0
100 |     @degree_radian_conversion = 0.0174532925 # pi / 180
101 |   end
102 | 
103 |   def init_lights
104 |     @ambient_light = [0.5, 0.5, 0.5, 1]
105 |     @diffuse_light = [1, 1, 1, 1]
106 |     @light_postion = [0, 0, 2, 1]
107 |   end
108 | 
109 |   def init_textures
110 |     @filter_index = 0
111 |     @filters = {}
112 |     glGetError
113 |     @all_meshes.keys.each do |name|
114 |       nearest = TjTexture.new(self, name)
115 |       glBindTexture(GL_TEXTURE_2D, nearest.info.tex_name)
116 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST)
117 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST)
118 | 
119 |       linear = TjTexture.new(self, name)
120 |       glBindTexture(GL_TEXTURE_2D, linear.info.tex_name)
121 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)
122 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR)
123 | 
124 |       minimap = TjTexture.new(self, name)
125 |       glBindTexture(GL_TEXTURE_2D, minimap.info.tex_name)
126 |       texture = glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_FLOAT)
127 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)
128 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST)
129 |       gluBuild2DMipmaps(GL_TEXTURE_2D, 3, minimap.image.width, minimap.image.height, GL_RGB, GL_FLOAT, texture)
130 |       @filters[name] = [nearest, linear, minimap]
131 |     end
132 |   end
133 | 
134 |   def init_scene
135 |     glBlendFunc(GL_SRC_ALPHA,GL_ONE)
136 |     glShadeModel(GL_SMOOTH)
137 |     glClearColor(0,0,0,0)
138 |     glClearDepth(1)
139 |     glEnable(GL_DEPTH_TEST)
140 |     glDepthFunc(GL_LEQUAL)
141 |     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
142 |   end
143 | 
144 | 
145 |   def add_perspective_to_scene
146 |     glEnable(GL_TEXTURE_2D)
147 |     glMatrixMode(GL_PROJECTION)
148 |     glLoadIdentity
149 |     gluPerspective(45.0, width / height, 0.1, 100.0)
150 |     glMatrixMode(GL_MODELVIEW)
151 |     glLoadIdentity
152 |   end
153 | 
154 |   def update
155 |     @y_angle -= 1.5 if button_down? Gosu::Button::KbRight
156 |     @y_angle += 1.5 if button_down? Gosu::Button::KbLeft
157 | 
158 |     if button_down?(Gosu::Button::KbUp)
159 |       @x_pos -= Math.sin(@y_angle * @degree_radian_conversion) * 0.05
160 |       @look_up_or_down_pos -= Math.cos(@y_angle * @degree_radian_conversion) * 0.05
161 |       @bouncing_angle > 359 ? @bouncing_angle = 0 : @bouncing_angle += 10
162 |       @bouncing = Math.sin(@bouncing_angle * @degree_radian_conversion) / 20
163 |     end
164 |     if button_down?(Gosu::Button::KbDown)
165 |       @x_pos += Math.sin(@y_angle * @degree_radian_conversion) * 0.05
166 |       @look_up_or_down_pos += Math.cos(@y_angle * @degree_radian_conversion) * 0.05
167 |       @bouncing_angle <= 1 ? @bouncing_angle = 359 : @bouncing_angle -= 10
168 |       @bouncing = Math.sin(@bouncing_angle * @degree_radian_conversion) / 20
169 |     end
170 |     @look_up_or_down -= 0.3 if button_down? Gosu::Button::KbPageUp
171 |     @look_up_or_down += 0.3 if button_down? Gosu::Button::KbPageDown
172 |     @y_pos -= 0.05 if button_down? Gosu::Button::KbW
173 |     @y_pos += 0.05 if button_down? Gosu::Button::KbS
174 |     @x_pos += 0.05 if button_down? Gosu::Button::KbD
175 |     @x_pos -= 0.05 if button_down? Gosu::Button::KbA
176 |   end
177 | 
178 |   def draw
179 |     gl do
180 |       init_scene
181 |       add_perspective_to_scene
182 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
183 |       glLightfv(GL_LIGHT1, GL_AMBIENT, @ambient_light)
184 |       glLightfv(GL_LIGHT1, GL_DIFFUSE, @diffuse_light)
185 |       glLightfv(GL_LIGHT1, GL_POSITION, @light_postion)
186 |       glEnable(GL_LIGHT1)
187 | 
188 |       @light_on ? glEnable(GL_LIGHTING) : glDisable(GL_LIGHTING)
189 |       if @blending
190 |         glEnable(GL_BLEND)
191 |         glDisable(GL_DEPTH_TEST)
192 |       else
193 |         glDisable(GL_BLEND)
194 |         glEnable(GL_DEPTH_TEST)
195 |       end
196 | 
197 |       x = -@x_pos
198 |       y = -@bouncing - 0.25 + @y_pos
199 |       z = -@look_up_or_down_pos
200 |       scene_angle = 360 - @y_angle
201 | 
202 |       glRotatef(@look_up_or_down,1,0,0)
203 |       glRotatef(scene_angle,0,1,0);
204 |       glTranslate(x, y, z)
205 | 
206 |       @all_meshes.each do |name, meshes|
207 |         glBindTexture(GL_TEXTURE_2D, @filters[name][@filter_index].info.tex_name)
208 |         meshes.each do |mesh|
209 |           draw_mesh(mesh)
210 |         end
211 |       end
212 |     end
213 |   end
214 | 
215 |   def draw_mesh(mesh)
216 |     glBegin(GL_QUADS)
217 |       glNormal3f(0, 0, 1)
218 |       mesh.vertexes.each do |vertex|
219 |         glTexCoord2f(vertex.u, vertex.v)
220 |         glVertex3f(vertex.x, vertex.y, vertex.z)
221 |       end
222 |     glEnd
223 |   end
224 | 
225 |   def change_filter!
226 |     @filter_index == 2 ? @filter_index = 0 : @filter_index += 1
227 |   end
228 | 
229 |   def button_down(id)
230 |     case id
231 |     when Gosu::Button::KbEscape then close
232 |     when Gosu::Button::KbL then @light_on = !@light_on
233 |     when Gosu::Button::KbF then change_filter!
234 |     when Gosu::Button::KbB then @blending = !@blending
235 |     end
236 |   end
237 | end
238 | 
239 | window = Window.new
240 | window.show


--------------------------------------------------------------------------------
/resources/nehe/lesson06/ruby.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/nehe/lesson06/ruby.png


--------------------------------------------------------------------------------
/resources/nehe/lesson07/crate.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/nehe/lesson07/crate.png


--------------------------------------------------------------------------------
/resources/nehe/lesson08/Glass.bmp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/nehe/lesson08/Glass.bmp


--------------------------------------------------------------------------------
/resources/nehe/lesson09/Star.bmp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/nehe/lesson09/Star.bmp


--------------------------------------------------------------------------------
/resources/nehe/lesson10/Mud.bmp:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/nehe/lesson10/Mud.bmp


--------------------------------------------------------------------------------
/resources/nehe/lesson10/world.json:
--------------------------------------------------------------------------------
  1 | [
  2 | [	{"x":-3,"y":0,"z":-3,"u":0,"v":1},
  3 | 	{"x":-3,"y":0,"z":3,"u":0,"v":0},
  4 | 	{"x":3,"y":0,"z":3,"u":1,"v":0}],
  5 | [	{"x":-3,"y":0,"z":-3,"u":0,"v":1},
  6 | 	{"x":3,"y":0,"z":-3,"u":1,"v":1},
  7 | 	{"x":3,"y":0,"z":3,"u":1,"v":0}],
  8 | [	{"x":-3,"y":1,"z":-3,"u":0,"v":1},
  9 | 	{"x":-3,"y":1,"z":3,"u":0,"v":0},
 10 | 	{"x":3,"y":1,"z":3,"u":1,"v":0}],
 11 | [	{"x":-3,"y":1,"z":-3,"u":0,"v":1},
 12 | 	{"x":3,"y":1,"z":-3,"u":1,"v":1},
 13 | 	{"x":3,"y":1,"z":3,"u":1,"v":0}],
 14 | [	{"x":-2,"y":1,"z":-2,"u":0,"v":1},
 15 | 	{"x":-2,"y":0,"z":-2,"u":0,"v":0},
 16 | 	{"x":-0.5,"y":0,"z":-2,"u":1,"v":0}],
 17 | [	{"x":-2,"y":1,"z":-2,"u":0,"v":1},
 18 | 	{"x":-0.5,"y":1,"z":-2,"u":1,"v":1},
 19 | 	{"x":-0.5,"y":0,"z":-2,"u":1,"v":0}],
 20 | [	{"x":2,"y":1,"z":-2,"u":0,"v":1},
 21 | 	{"x":2,"y":0,"z":-2,"u":0,"v":0},
 22 | 	{"x":0.5,"y":0,"z":-2,"u":1,"v":0}],
 23 | [	{"x":2,"y":1,"z":-2,"u":0,"v":1},
 24 | 	{"x":0.5,"y":1,"z":-2,"u":1,"v":1},
 25 | 	{"x":0.5,"y":0,"z":-2,"u":1,"v":0}],
 26 | [	{"x":-2,"y":1,"z":2,"u":0,"v":1},
 27 | 	{"x":-2,"y":0,"z":2,"u":0,"v":0},
 28 | 	{"x":-0.5,"y":0,"z":2,"u":1,"v":0}],
 29 | [	{"x":-2,"y":1,"z":2,"u":0,"v":1},
 30 | 	{"x":-0.5,"y":1,"z":2,"u":1,"v":1},
 31 | 	{"x":-0.5,"y":0,"z":2,"u":1,"v":0}],
 32 | [	{"x":2,"y":1,"z":2,"u":0,"v":1},
 33 | 	{"x":2,"y":0,"z":2,"u":0,"v":0},
 34 | 	{"x":0.5,"y":0,"z":2,"u":1,"v":0}],
 35 | [	{"x":2,"y":1,"z":2,"u":0,"v":1},
 36 | 	{"x":0.5,"y":1,"z":2,"u":1,"v":1},
 37 | 	{"x":0.5,"y":0,"z":2,"u":1,"v":0}],
 38 | [	{"x":-2,"y":1,"z":-2,"u":0,"v":1},
 39 | 	{"x":-2,"y":0,"z":-2,"u":0,"v":0},
 40 | 	{"x":-2,"y":0,"z":-0.5,"u":1,"v":0}],
 41 | [	{"x":-2,"y":1,"z":-2,"u":0,"v":1},
 42 | 	{"x":-2,"y":1,"z":-0.5,"u":1,"v":1},
 43 | 	{"x":-2,"y":0,"z":-0.5,"u":1,"v":0}],
 44 | [	{"x":-2,"y":1,"z":2,"u":0,"v":1},
 45 | 	{"x":-2,"y":0,"z":2,"u":0,"v":0},
 46 | 	{"x":-2,"y":0,"z":0.5,"u":1,"v":0}],
 47 | [	{"x":-2,"y":1,"z":2,"u":0,"v":1},
 48 | 	{"x":-2,"y":1,"z":0.5,"u":1,"v":1},
 49 | 	{"x":-2,"y":0,"z":0.5,"u":1,"v":0}],
 50 | [	{"x":2,"y":1,"z":-2,"u":0,"v":1},
 51 | 	{"x":2,"y":0,"z":-2,"u":0,"v":0},
 52 | 	{"x":2,"y":0,"z":-0.5,"u":1,"v":0}],
 53 | [	{"x":2,"y":1,"z":-2,"u":0,"v":1},
 54 | 	{"x":2,"y":1,"z":-0.5,"u":1,"v":1},
 55 | 	{"x":2,"y":0,"z":-0.5,"u":1,"v":0}],
 56 | [	{"x":2,"y":1,"z":2,"u":0,"v":1},
 57 | 	{"x":2,"y":0,"z":2,"u":0,"v":0},
 58 | 	{"x":2,"y":0,"z":0.5,"u":1,"v":0}],
 59 | [	{"x":2,"y":1,"z":2,"u":0,"v":1},
 60 | 	{"x":2,"y":1,"z":0.5,"u":1,"v":1},
 61 | 	{"x":2,"y":0,"z":0.5,"u":1,"v":0}],
 62 | [	{"x":-0.5,"y":1,"z":-3,"u":0,"v":1},
 63 | 	{"x":-0.5,"y":0,"z":-3,"u":0,"v":0},
 64 | 	{"x":-0.5,"y":0,"z":-2,"u":1,"v":0}],
 65 | [	{"x":-0.5,"y":1,"z":-3,"u":0,"v":1},
 66 | 	{"x":-0.5,"y":1,"z":-2,"u":1,"v":1},
 67 | 	{"x":-0.5,"y":0,"z":-2,"u":1,"v":0}],
 68 | [	{"x":0.5,"y":1,"z":-3,"u":0,"v":1},
 69 | 	{"x":0.5,"y":0,"z":-3,"u":0,"v":0},
 70 | 	{"x":0.5,"y":0,"z":-2,"u":1,"v":0}],
 71 | [	{"x":0.5,"y":1,"z":-3,"u":0,"v":1},
 72 | 	{"x":0.5,"y":1,"z":-2,"u":1,"v":1},
 73 | 	{"x":0.5,"y":0,"z":-2,"u":1,"v":0}],
 74 | [	{"x":-0.5,"y":1,"z":3,"u":0,"v":1},
 75 | 	{"x":-0.5,"y":0,"z":3,"u":0,"v":0},
 76 | 	{"x":-0.5,"y":0,"z":2,"u":1,"v":0}],
 77 | [	{"x":-0.5,"y":1,"z":3,"u":0,"v":1},
 78 | 	{"x":-0.5,"y":1,"z":2,"u":1,"v":1},
 79 | 	{"x":-0.5,"y":0,"z":2,"u":1,"v":0}],
 80 | [	{"x":0.5,"y":1,"z":3,"u":0,"v":1},
 81 | 	{"x":0.5,"y":0,"z":3,"u":0,"v":0},
 82 | 	{"x":0.5,"y":0,"z":2,"u":1,"v":0}],
 83 | [	{"x":0.5,"y":1,"z":3,"u":0,"v":1},
 84 | 	{"x":0.5,"y":1,"z":2,"u":1,"v":1},
 85 | 	{"x":0.5,"y":0,"z":2,"u":1,"v":0}],
 86 | [	{"x":-3,"y":1,"z":0.5,"u":1,"v":1},
 87 | 	{"x":-3,"y":0,"z":0.5,"u":1,"v":0},
 88 | 	{"x":-2,"y":0,"z":0.5,"u":0,"v":0}],
 89 | [	{"x":-3,"y":1,"z":0.5,"u":1,"v":1},
 90 | 	{"x":-2,"y":1,"z":0.5,"u":0,"v":1},
 91 | 	{"x":-2,"y":0,"z":0.5,"u":0,"v":0}],
 92 | [	{"x":-3,"y":1,"z":-0.5,"u":1,"v":1},
 93 | 	{"x":-3,"y":0,"z":-0.5,"u":1,"v":0},
 94 | 	{"x":-2,"y":0,"z":-0.5,"u":0,"v":0}],
 95 | [	{"x":-3,"y":1,"z":-0.5,"u":1,"v":1},
 96 | 	{"x":-2,"y":1,"z":-0.5,"u":0,"v":1},
 97 | 	{"x":-2,"y":0,"z":-0.5,"u":0,"v":0}],
 98 | [	{"x":3,"y":1,"z":0.5,"u":1,"v":1},
 99 | 	{"x":3,"y":0,"z":0.5,"u":1,"v":0},
100 | 	{"x":2,"y":0,"z":0.5,"u":0,"v":0}],
101 | [	{"x":3,"y":1,"z":0.5,"u":1,"v":1},
102 | 	{"x":2,"y":1,"z":0.5,"u":0,"v":1},
103 | 	{"x":2,"y":0,"z":0.5,"u":0,"v":0}],
104 | [	{"x":3,"y":1,"z":-0.5,"u":1,"v":1},
105 | 	{"x":3,"y":0,"z":-0.5,"u":1,"v":0},
106 | 	{"x":2,"y":0,"z":-0.5,"u":0,"v":0}],
107 | [	{"x":3,"y":1,"z":-0.5,"u":1,"v":1},
108 | 	{"x":2,"y":1,"z":-0.5,"u":0,"v":1},
109 | 	{"x":2,"y":0,"z":-0.5,"u":0,"v":0}]
110 | ]


--------------------------------------------------------------------------------
/resources/tj/lesson01/earth.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson01/earth.png


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/brick_wall.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson10_advance/brick_wall.jpg


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/ceiling.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson10_advance/ceiling.jpg


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/hallway.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson10_advance/hallway.jpg


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/small_brick_wall.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson10_advance/small_brick_wall.jpg


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/tile_floor.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson10_advance/tile_floor.jpg


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/wooden_floor.jpg:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tjbladez/gosu-opengl-tutorials/8f6c8ea0450f66c28577fec45b46aa7424da6998/resources/tj/lesson10_advance/wooden_floor.jpg


--------------------------------------------------------------------------------
/resources/tj/lesson10_advance/world.json:
--------------------------------------------------------------------------------
  1 | {"wooden_floor":    [[{"x":-4,"y":0,"z":-4,"u":0,"v":0},
  2 | 	                    {"x":4,"y":0,"z":-4,"u":1 ,"v":0},
  3 | 	                    {"x":4,"y":0,"z":1,"u":1,"v": 1 },
  4 | 	                    {"x":-4,"y":0,"z":1,"u":0, "v": 1}]],
  5 |  "tile_floor":      [[{"x":-4,"y":0,"z":-9,"u":0,"v":0},
  6 |                       {"x":0,"y":0,"z":-9,"u":1 ,"v":0},
  7 |                       {"x":0,"y":0,"z":-5,"u":1,"v": 1 },
  8 |                       {"x":-4,"y":0,"z":-5,"u":0, "v": 1}],
  9 |                      [{"x":0,"y":0,"z":-9,"u":0,"v":0},
 10 |                       {"x":4,"y":0,"z":-9,"u":1 ,"v":0},
 11 |                       {"x":4,"y":0,"z":-5,"u":1,"v": 1 },
 12 |                       {"x":0,"y":0,"z":-5,"u":0, "v": 1}]],
 13 |  "hallway":         [[{"x":0,"y":0,"z":-5,"u":0,"v":0},
 14 |                       {"x":1,"y":0,"z":-5,"u":1 ,"v":0},
 15 |                       {"x":1,"y":0,"z":-4,"u":1,"v": 1 },
 16 |                       {"x":0,"y":0,"z":-4,"u":0, "v": 1}]],
 17 |  "brick_wall":      [[{"x":-4,"y":2,"z":-9,"u":0,"v":0},
 18 |                       {"x":-3,"y":2,"z":-9,"u":1 ,"v":0},
 19 |                       {"x":-3,"y":1,"z":-9,"u":1,"v": 0.968 },
 20 |                       {"x":-4,"y":1,"z":-9,"u":0, "v": 0.968}],
 21 |                      [{"x":-3,"y":2,"z":-9,"u":0,"v":0},
 22 |                       {"x":-2,"y":2,"z":-9,"u":1 ,"v":0},
 23 |                       {"x":-2,"y":1,"z":-9,"u":1,"v": 0.968 },
 24 |                       {"x":-3,"y":1,"z":-9,"u":0, "v": 0.968}],
 25 |                      [{"x":-2,"y":2,"z":-9,"u":0,"v":0},
 26 |                       {"x":-1,"y":2,"z":-9,"u":1 ,"v":0},
 27 |                       {"x":-1,"y":1,"z":-9,"u":1,"v": 0.968 },
 28 |                       {"x":-2,"y":1,"z":-9,"u":0, "v": 0.968}],
 29 |                      [{"x":-1,"y":2,"z":-9,"u":0,"v":0},
 30 |                       {"x":0,"y":2,"z":-9,"u":1 ,"v":0},
 31 |                       {"x":0,"y":1,"z":-9,"u":1,"v": 0.968 },
 32 |                       {"x":-1,"y":1,"z":-9,"u":0, "v": 0.968}],
 33 |                      [{"x":-4,"y":1,"z":-9,"u":0,"v":0},
 34 |                       {"x":-3,"y":1,"z":-9,"u":1 ,"v":0},
 35 |                       {"x":-3,"y":0,"z":-9,"u":1,"v": 0.968 },
 36 |                       {"x":-4,"y":0,"z":-9,"u":0, "v": 0.968}],
 37 |                      [{"x":-3,"y":1,"z":-9,"u":0,"v":0},
 38 |                       {"x":-2,"y":1,"z":-9,"u":1 ,"v":0},
 39 |                       {"x":-2,"y":0,"z":-9,"u":1,"v": 0.968 },
 40 |                       {"x":-3,"y":0,"z":-9,"u":0, "v": 0.968}],
 41 |                      [{"x":-2,"y":1,"z":-9,"u":0,"v":0},
 42 |                       {"x":-1,"y":1,"z":-9,"u":1 ,"v":0},
 43 |                       {"x":-1,"y":0,"z":-9,"u":1,"v": 0.968 },
 44 |                       {"x":-2,"y":0,"z":-9,"u":0, "v": 0.968}],
 45 |                      [{"x":-1,"y":1,"z":-9,"u":0,"v":0},
 46 |                       {"x":0,"y":1,"z":-9,"u":1 ,"v":0},
 47 |                       {"x":0,"y":0,"z":-9,"u":1,"v": 0.968 },
 48 |                       {"x":-1,"y":0,"z":-9,"u":0, "v": 0.968}],
 49 |                      [{"x":0,"y":2,"z":-9,"u":0,"v":0},
 50 |                       {"x":1,"y":2,"z":-9,"u":1 ,"v":0},
 51 |                       {"x":1,"y":1,"z":-9,"u":1,"v":0.968},
 52 |                       {"x":0,"y":1,"z":-9,"u":0, "v":0.968}],
 53 |                      [{"x":1,"y":2,"z":-9,"u":0,"v":0},
 54 |                       {"x":2,"y":2,"z":-9,"u":1 ,"v":0},
 55 |                       {"x":2,"y":1,"z":-9,"u":1,"v": 0.968 },
 56 |                       {"x":1,"y":1,"z":-9,"u":0, "v": 0.968}],
 57 |                      [{"x":2,"y":2,"z":-9,"u":0,"v":0},
 58 |                       {"x":3,"y":2,"z":-9,"u":1 ,"v":0},
 59 |                       {"x":3,"y":1,"z":-9,"u":1,"v": 0.968 },
 60 |                       {"x":2,"y":1,"z":-9,"u":0, "v": 0.968}],
 61 |                      [{"x":3,"y":2,"z":-9,"u":0,"v":0},
 62 |                       {"x":4,"y":2,"z":-9,"u":1 ,"v":0},
 63 |                       {"x":4,"y":1,"z":-9,"u":1,"v": 0.968 },
 64 |                       {"x":3,"y":1,"z":-9,"u":0, "v": 0.968}],
 65 |                      [{"x":0,"y":1,"z":-9,"u":0,"v":0},
 66 |                       {"x":1,"y":1,"z":-9,"u":1 ,"v":0},
 67 |                       {"x":1,"y":0,"z":-9,"u":1,"v": 0.968 },
 68 |                       {"x":0,"y":0,"z":-9,"u":0, "v": 0.968}],
 69 |                      [{"x":1,"y":1,"z":-9,"u":0,"v":0},
 70 |                       {"x":2,"y":1,"z":-9,"u":1 ,"v":0},
 71 |                       {"x":2,"y":0,"z":-9,"u":1,"v": 0.968 },
 72 |                       {"x":1,"y":0,"z":-9,"u":0, "v": 0.968}],
 73 |                      [{"x":2,"y":1,"z":-9,"u":0,"v":0},
 74 |                       {"x":3,"y":1,"z":-9,"u":1 ,"v":0},
 75 |                       {"x":3,"y":0,"z":-9,"u":1,"v": 0.968 },
 76 |                       {"x":2,"y":0,"z":-9,"u":0, "v": 0.968}],
 77 |                      [{"x":3,"y":1,"z":-9,"u":0,"v":0},
 78 |                       {"x":4,"y":1,"z":-9,"u":1 ,"v":0},
 79 |                       {"x":4,"y":0,"z":-9,"u":1,"v": 0.968 },
 80 |                       {"x":3,"y":0,"z":-9,"u":0, "v": 0.968}],
 81 |                      [{"x":-4,"y":2,"z":-5,"u":0,"v":0},
 82 |                       {"x":-4,"y":2,"z":-6,"u":1 ,"v":0},
 83 |                       {"x":-4,"y":1,"z":-6,"u":1,"v": 0.968 },
 84 |                       {"x":-4,"y":1,"z":-5,"u":0, "v": 0.968}],
 85 |                      [{"x":-4,"y":2,"z":-6,"u":0,"v":0},
 86 |                       {"x":-4,"y":2,"z":-7,"u":1 ,"v":0},
 87 |                       {"x":-4,"y":1,"z":-7,"u":1,"v": 0.968 },
 88 |                       {"x":-4,"y":1,"z":-6,"u":0, "v": 0.968}],
 89 |                      [{"x":-4,"y":2,"z":-7,"u":0,"v":0},
 90 |                       {"x":-4,"y":2,"z":-8,"u":1 ,"v":0},
 91 |                       {"x":-4,"y":1,"z":-8,"u":1,"v": 0.968 },
 92 |                       {"x":-4,"y":1,"z":-7,"u":0, "v": 0.968}],
 93 |                      [{"x":-4,"y":2,"z":-8,"u":0,"v":0},
 94 |                       {"x":-4,"y":2,"z":-9,"u":1 ,"v":0},
 95 |                       {"x":-4,"y":1,"z":-9,"u":1,"v": 0.968 },
 96 |                       {"x":-4,"y":1,"z":-8,"u":0, "v": 0.968}],
 97 |                      [{"x":-4,"y":1,"z":-5,"u":0,"v":0},
 98 |                       {"x":-4,"y":1,"z":-6,"u":1 ,"v":0},
 99 |                       {"x":-4,"y":0,"z":-6,"u":1,"v": 0.968 },
100 |                       {"x":-4,"y":0,"z":-5,"u":0, "v": 0.968}],
101 |                      [{"x":-4,"y":1,"z":-6,"u":0,"v":0},
102 |                       {"x":-4,"y":1,"z":-7,"u":1 ,"v":0},
103 |                       {"x":-4,"y":0,"z":-7,"u":1,"v": 0.968 },
104 |                       {"x":-4,"y":0,"z":-6,"u":0, "v": 0.968}],
105 |                      [{"x":-4,"y":1,"z":-7,"u":0,"v":0},
106 |                       {"x":-4,"y":1,"z":-8,"u":1 ,"v":0},
107 |                       {"x":-4,"y":0,"z":-8,"u":1,"v": 0.968 },
108 |                       {"x":-4,"y":0,"z":-7,"u":0, "v": 0.968}],
109 |                      [{"x":-4,"y":1,"z":-8,"u":0,"v":0},
110 |                       {"x":-4,"y":1,"z":-9,"u":1 ,"v":0},
111 |                       {"x":-4,"y":0,"z":-9,"u":1,"v": 0.968 },
112 |                       {"x":-4,"y":0,"z":-8,"u":0, "v": 0.968}],
113 |                      [{"x":4,"y":2,"z":-9,"u":0,"v":0},
114 |                       {"x":4,"y":2,"z":-8,"u":1 ,"v":0},
115 |                       {"x":4,"y":1,"z":-8,"u":1,"v": 0.968 },
116 |                       {"x":4,"y":1,"z":-9,"u":0, "v": 0.968}],
117 |                      [{"x":4,"y":2,"z":-8,"u":0,"v":0},
118 |                       {"x":4,"y":2,"z":-7,"u":1 ,"v":0},
119 |                       {"x":4,"y":1,"z":-7,"u":1,"v": 0.968 },
120 |                       {"x":4,"y":1,"z":-8,"u":0, "v": 0.968}],
121 |                      [{"x":4,"y":2,"z":-7,"u":0,"v":0},
122 |                       {"x":4,"y":2,"z":-6,"u":1 ,"v":0},
123 |                       {"x":4,"y":1,"z":-6,"u":1,"v": 0.968 },
124 |                       {"x":4,"y":1,"z":-7,"u":0, "v": 0.968}],
125 |                      [{"x":4,"y":2,"z":-6,"u":0,"v":0},
126 |                       {"x":4,"y":2,"z":-5,"u":1 ,"v":0},
127 |                       {"x":4,"y":1,"z":-5,"u":1,"v": 0.968 },
128 |                       {"x":4,"y":1,"z":-6,"u":0, "v": 0.968}],
129 |                      [{"x":4,"y":1,"z":-9,"u":0,"v":0},
130 |                       {"x":4,"y":1,"z":-8,"u":1 ,"v":0},
131 |                       {"x":4,"y":0,"z":-8,"u":1,"v": 0.968 },
132 |                       {"x":4,"y":0,"z":-9,"u":0, "v": 0.968}],
133 |                      [{"x":4,"y":1,"z":-8,"u":0,"v":0},
134 |                       {"x":4,"y":1,"z":-7,"u":1 ,"v":0},
135 |                       {"x":4,"y":0,"z":-7,"u":1,"v": 0.968 },
136 |                       {"x":4,"y":0,"z":-8,"u":0, "v": 0.968}],
137 |                      [{"x":4,"y":1,"z":-7,"u":0,"v":0},
138 |                       {"x":4,"y":1,"z":-6,"u":1 ,"v":0},
139 |                       {"x":4,"y":0,"z":-6,"u":1,"v": 0.968 },
140 |                       {"x":4,"y":0,"z":-7,"u":0, "v": 0.968}],
141 |                      [{"x":4,"y":1,"z":-6,"u":0,"v":0},
142 |                       {"x":4,"y":1,"z":-5,"u":1 ,"v":0},
143 |                       {"x":4,"y":0,"z":-5,"u":1,"v": 0.968 },
144 |                       {"x":4,"y":0,"z":-6,"u":0, "v": 0.968}],
145 |                      [{"x":4,"y":2,"z":-5,"u":0,"v":0},
146 |                       {"x":3,"y":2,"z":-5,"u":1 ,"v":0},
147 |                       {"x":3,"y":1,"z":-5,"u":1,"v": 0.968 },
148 |                       {"x":4,"y":1,"z":-5,"u":0, "v": 0.968}],
149 |                      [{"x":3,"y":2,"z":-5,"u":0,"v":0},
150 |                       {"x":2,"y":2,"z":-5,"u":1 ,"v":0},
151 |                       {"x":2,"y":1,"z":-5,"u":1,"v": 0.968 },
152 |                       {"x":3,"y":1,"z":-5,"u":0, "v": 0.968}],
153 |                      [{"x":2,"y":2,"z":-5,"u":0,"v":0},
154 |                       {"x":1,"y":2,"z":-5,"u":1 ,"v":0},
155 |                       {"x":1,"y":1,"z":-5,"u":1,"v": 0.968 },
156 |                       {"x":2,"y":1,"z":-5,"u":0, "v": 0.968}],
157 |                      [{"x":1,"y":2,"z":-5,"u":0,"v":0},
158 |                       {"x":0, "y":2,"z":-5,"u":1 ,"v":0},
159 |                       {"x":0, "y":1,"z":-5,"u":1,"v": 0.968 },
160 |                       {"x":1,"y":1,"z":-5,"u":0, "v": 0.968}],
161 |                      [{"x":4,"y":1,"z":-5,"u":0,"v":0},
162 |                       {"x":3,"y":1,"z":-5,"u":1 ,"v":0},
163 |                       {"x":3,"y":0,"z":-5,"u":1,"v": 0.968 },
164 |                       {"x":4,"y":0,"z":-5,"u":0, "v": 0.968}],
165 |                      [{"x":3,"y":1,"z":-5,"u":0,"v":0},
166 |                       {"x":2,"y":1,"z":-5,"u":1 ,"v":0},
167 |                       {"x":2,"y":0,"z":-5,"u":1,"v": 0.968 },
168 |                       {"x":3,"y":0,"z":-5,"u":0, "v": 0.968}],
169 |                      [{"x":2,"y":1,"z":-5,"u":0,"v":0},
170 |                       {"x":1,"y":1,"z":-5,"u":1 ,"v":0},
171 |                       {"x":1,"y":0,"z":-5,"u":1,"v": 0.968 },
172 |                       {"x":2,"y":0,"z":-5,"u":0, "v": 0.968}],
173 |                      [{"x":0,"y":2,"z":-5,"u":0,"v":0},
174 |                       {"x":-1,"y":2,"z":-5,"u":1 ,"v":0},
175 |                       {"x":-1,"y":1,"z":-5,"u":1,"v":0.968},
176 |                       {"x":0,"y":1,"z":-5,"u":0, "v":0.968}],
177 |                      [{"x":-1,"y":2,"z":-5,"u":0,"v":0},
178 |                       {"x":-2,"y":2,"z":-5,"u":1 ,"v":0},
179 |                       {"x":-2,"y":1,"z":-5,"u":1,"v": 0.968 },
180 |                       {"x":-1,"y":1,"z":-5,"u":0, "v": 0.968}],
181 |                      [{"x":-2,"y":2,"z":-5,"u":0,"v":0},
182 |                       {"x":-3,"y":2,"z":-5,"u":1 ,"v":0},
183 |                       {"x":-3,"y":1,"z":-5,"u":1,"v": 0.968 },
184 |                       {"x":-2,"y":1,"z":-5,"u":0, "v": 0.968}],
185 |                      [{"x":-3,"y":2,"z":-5,"u":0,"v":0},
186 |                       {"x":-4,"y":2,"z":-5,"u":1 ,"v":0},
187 |                       {"x":-4,"y":1,"z":-5,"u":1,"v": 0.968 },
188 |                       {"x":-3,"y":1,"z":-5,"u":0, "v": 0.968}],
189 |                      [{"x":0,"y":1,"z":-5,"u":0,"v":0},
190 |                       {"x":-1,"y":1,"z":-5,"u":1 ,"v":0},
191 |                       {"x":-1,"y":0,"z":-5,"u":1,"v": 0.968 },
192 |                       {"x":0,"y":0,"z":-5,"u":0, "v": 0.968}],
193 |                      [{"x":-1,"y":1,"z":-5,"u":0,"v":0},
194 |                       {"x":-2,"y":1,"z":-5,"u":1 ,"v":0},
195 |                       {"x":-2,"y":0,"z":-5,"u":1,"v": 0.968 },
196 |                       {"x":-1,"y":0,"z":-5,"u":0, "v": 0.968}],
197 |                      [{"x":-2,"y":1,"z":-5,"u":0,"v":0},
198 |                       {"x":-3,"y":1,"z":-5,"u":1 ,"v":0},
199 |                       {"x":-3,"y":0,"z":-5,"u":1,"v": 0.968 },
200 |                       {"x":-2,"y":0,"z":-5,"u":0, "v": 0.968}],
201 |                      [{"x":-3,"y":1,"z":-5,"u":0,"v":0},
202 |                       {"x":-4,"y":1,"z":-5,"u":1 ,"v":0},
203 |                       {"x":-4,"y":0,"z":-5,"u":1,"v": 0.968 },
204 |                       {"x":-3,"y":0,"z":-5,"u":0, "v": 0.968}],
205 |                      [{"x":1,"y":1,"z":-5,"u":0,"v":0},
206 |                       {"x":1,"y":1,"z":-4,"u":1 ,"v":0},
207 |                       {"x":1,"y":0,"z":-4,"u":1,"v": 0.968 },
208 |                       {"x":1,"y":0,"z":-5,"u":0, "v": 0.968}],
209 |                      [{"x":0,"y":1,"z":-5,"u":0,"v":0},
210 |                       {"x":0,"y":1,"z":-4,"u":1 ,"v":0},
211 |                       {"x":0,"y":0,"z":-4,"u":1,"v": 0.968 },
212 |                       {"x":0,"y":0,"z":-5,"u":0, "v": 0.968}],
213 |                      [{"x":0,"y":1,"z":-5,"u":0,"v":0},
214 |                       {"x":1,"y":1,"z":-5,"u":1 ,"v":0},
215 |                       {"x":1,"y":1,"z":-4,"u":1,"v": 0.968 },
216 |                       {"x":0,"y":1,"z":-4,"u":0, "v": 0.968}]],
217 |  "small_brick_wall":[[{"x":-4,"y":2,"z":-4,"u":0,"v":0},
218 |                       {"x":-3,"y":2,"z":-4,"u":1 ,"v":0},
219 |                       {"x":-3,"y":1,"z":-4,"u":1,"v": 0.968 },
220 |                       {"x":-4,"y":1,"z":-4,"u":0, "v": 0.968}],
221 |                      [{"x":-3,"y":2,"z":-4,"u":0,"v":0},
222 |                       {"x":-2,"y":2,"z":-4,"u":1 ,"v":0},
223 |                       {"x":-2,"y":1,"z":-4,"u":1,"v": 0.968 },
224 |                       {"x":-3,"y":1,"z":-4,"u":0, "v": 0.968}],
225 |                      [{"x":-2,"y":2,"z":-4,"u":0,"v":0},
226 |                       {"x":-1,"y":2,"z":-4,"u":1 ,"v":0},
227 |                       {"x":-1,"y":1,"z":-4,"u":1,"v": 0.968 },
228 |                       {"x":-2,"y":1,"z":-4,"u":0, "v": 0.968}],
229 |                      [{"x":-1,"y":2,"z":-4,"u":0,"v":0},
230 |                       {"x":0,"y":2,"z":-4,"u":1 ,"v":0},
231 |                       {"x":0,"y":1,"z":-4,"u":1,"v": 0.968 },
232 |                       {"x":-1,"y":1,"z":-4,"u":0, "v": 0.968}],
233 |                      [{"x":-4,"y":1,"z":-4,"u":0,"v":0},
234 |                       {"x":-3,"y":1,"z":-4,"u":1 ,"v":0},
235 |                       {"x":-3,"y":0,"z":-4,"u":1,"v": 0.968 },
236 |                       {"x":-4,"y":0,"z":-4,"u":0, "v": 0.968}],
237 |                      [{"x":-3,"y":1,"z":-4,"u":0,"v":0},
238 |                       {"x":-2,"y":1,"z":-4,"u":1 ,"v":0},
239 |                       {"x":-2,"y":0,"z":-4,"u":1,"v": 0.968 },
240 |                       {"x":-3,"y":0,"z":-4,"u":0, "v": 0.968}],
241 |                      [{"x":-2,"y":1,"z":-4,"u":0,"v":0},
242 |                       {"x":-1,"y":1,"z":-4,"u":1 ,"v":0},
243 |                       {"x":-1,"y":0,"z":-4,"u":1,"v": 0.968 },
244 |                       {"x":-2,"y":0,"z":-4,"u":0, "v": 0.968}],
245 |                      [{"x":-1,"y":1,"z":-4,"u":0,"v":0},
246 |                       {"x":0,"y":1,"z":-4,"u":1 ,"v":0},
247 |                       {"x":0,"y":0,"z":-4,"u":1,"v": 0.968 },
248 |                       {"x":-1,"y":0,"z":-4,"u":0, "v": 0.968}],
249 |                      [{"x":0,"y":2,"z":-4,"u":0,"v":0},
250 |                       {"x":1,"y":2,"z":-4,"u":1 ,"v":0},
251 |                       {"x":1,"y":1,"z":-4,"u":1,"v":0.968},
252 |                       {"x":0,"y":1,"z":-4,"u":0, "v":0.968}],
253 |                      [{"x":1,"y":2,"z":-4,"u":0,"v":0},
254 |                       {"x":2,"y":2,"z":-4,"u":1 ,"v":0},
255 |                       {"x":2,"y":1,"z":-4,"u":1,"v": 0.968 },
256 |                       {"x":1,"y":1,"z":-4,"u":0, "v": 0.968}],
257 |                      [{"x":2,"y":2,"z":-4,"u":0,"v":0},
258 |                       {"x":3,"y":2,"z":-4,"u":1 ,"v":0},
259 |                       {"x":3,"y":1,"z":-4,"u":1,"v": 0.968 },
260 |                       {"x":2,"y":1,"z":-4,"u":0, "v": 0.968}],
261 |                      [{"x":3,"y":2,"z":-4,"u":0,"v":0},
262 |                       {"x":4,"y":2,"z":-4,"u":1 ,"v":0},
263 |                       {"x":4,"y":1,"z":-4,"u":1,"v": 0.968 },
264 |                       {"x":3,"y":1,"z":-4,"u":0, "v": 0.968}],
265 |                      [{"x":1,"y":1,"z":-4,"u":0,"v":0},
266 |                       {"x":2,"y":1,"z":-4,"u":1 ,"v":0},
267 |                       {"x":2,"y":0,"z":-4,"u":1,"v": 0.968 },
268 |                       {"x":1,"y":0,"z":-4,"u":0, "v": 0.968}],
269 |                      [{"x":2,"y":1,"z":-4,"u":0,"v":0},
270 |                       {"x":3,"y":1,"z":-4,"u":1 ,"v":0},
271 |                       {"x":3,"y":0,"z":-4,"u":1,"v": 0.968 },
272 |                       {"x":2,"y":0,"z":-4,"u":0, "v": 0.968}],
273 |                      [{"x":3,"y":1,"z":-4,"u":0,"v":0},
274 |                       {"x":4,"y":1,"z":-4,"u":1 ,"v":0},
275 |                       {"x":4,"y":0,"z":-4,"u":1,"v": 0.968 },
276 |                       {"x":3,"y":0,"z":-4,"u":0, "v": 0.968}],
277 |                      [{"x":-4,"y":2,"z":1,"u":0,"v":0},
278 |                       {"x":-4,"y":2,"z":0,"u":1 ,"v":0},
279 |                       {"x":-4,"y":1,"z":0,"u":1,"v": 0.968 },
280 |                       {"x":-4,"y":1,"z":1,"u":0, "v": 0.968}],
281 |                      [{"x":-4,"y":2,"z":0,"u":0,"v":0},
282 |                       {"x":-4,"y":2,"z":-1,"u":1 ,"v":0},
283 |                       {"x":-4,"y":1,"z":-1,"u":1,"v": 0.968 },
284 |                       {"x":-4,"y":1,"z":0,"u":0, "v": 0.968}],
285 |                      [{"x":-4,"y":2,"z":-1,"u":0,"v":0},
286 |                       {"x":-4,"y":2,"z":-2,"u":1 ,"v":0},
287 |                       {"x":-4,"y":1,"z":-2, "u":1,"v": 0.968 },
288 |                       {"x":-4,"y":1,"z":-1,"u":0, "v": 0.968}],
289 |                      [{"x":-4,"y":2,"z":-2,"u":0,"v":0},
290 |                       {"x":-4,"y":2,"z":-3,"u":1 ,"v":0},
291 |                       {"x":-4,"y":1,"z":-3,"u":1,"v": 0.968 },
292 |                       {"x":-4,"y":1,"z":-2,"u":0, "v": 0.968}],
293 |                      [{"x":-4,"y":2,"z":-3,"u":0,"v":0},
294 |                       {"x":-4,"y":2,"z":-4,"u":1 ,"v":0},
295 |                       {"x":-4,"y":1,"z":-4,"u":1,"v": 0.968 },
296 |                       {"x":-4,"y":1,"z":-3,"u":0, "v": 0.968}],
297 |                      [{"x":-4,"y":1,"z":1,"u":0,"v":0},
298 |                       {"x":-4,"y":1,"z":0,"u":1 ,"v":0},
299 |                       {"x":-4,"y":0,"z":0,"u":1,"v": 0.968 },
300 |                       {"x":-4,"y":0,"z":1,"u":0, "v": 0.968}],
301 |                      [{"x":-4,"y":1,"z":0,"u":0,"v":0},
302 |                       {"x":-4,"y":1,"z":-1,"u":1 ,"v":0},
303 |                       {"x":-4,"y":0,"z":-1,"u":1,"v": 0.968 },
304 |                       {"x":-4,"y":0,"z":0,"u":0, "v": 0.968}],
305 |                      [{"x":-4,"y":1,"z":-1,"u":0,"v":0},
306 |                       {"x":-4,"y":1,"z":-2,"u":1 ,"v":0},
307 |                       {"x":-4,"y":0,"z":-2, "u":1,"v": 0.968 },
308 |                       {"x":-4,"y":0,"z":-1,"u":0, "v": 0.968}],
309 |                      [{"x":-4,"y":1,"z":-2,"u":0,"v":0},
310 |                       {"x":-4,"y":1,"z":-3,"u":1 ,"v":0},
311 |                       {"x":-4,"y":0,"z":-3,"u":1,"v": 0.968 },
312 |                       {"x":-4,"y":0,"z":-2,"u":0, "v": 0.968}],
313 |                      [{"x":-4,"y":1,"z":-3,"u":0,"v":0},
314 |                       {"x":-4,"y":1,"z":-4,"u":1 ,"v":0},
315 |                       {"x":-4,"y":0,"z":-4,"u":1,"v": 0.968 },
316 |                       {"x":-4,"y":0,"z":-3,"u":0, "v": 0.968}],
317 |                      [{"x":4,"y":2,"z":1,"u":0,"v":0},
318 |                       {"x":4,"y":2,"z":0,"u":1 ,"v":0},
319 |                       {"x":4,"y":1,"z":0,"u":1,"v": 0.968 },
320 |                       {"x":4,"y":1,"z":1,"u":0, "v": 0.968}],
321 |                      [{"x":4,"y":2,"z":0,"u":0,"v":0},
322 |                       {"x":4,"y":2,"z":-1,"u":1 ,"v":0},
323 |                       {"x":4,"y":1,"z":-1,"u":1,"v": 0.968 },
324 |                       {"x":4,"y":1,"z":0,"u":0, "v": 0.968}],
325 |                      [{"x":4,"y":2,"z":-1,"u":0,"v":0},
326 |                       {"x":4,"y":2,"z":-2,"u":1 ,"v":0},
327 |                       {"x":4,"y":1,"z":-2, "u":1,"v": 0.968 },
328 |                       {"x":4,"y":1,"z":-1,"u":0, "v": 0.968}],
329 |                      [{"x":4,"y":2,"z":-2,"u":0,"v":0},
330 |                       {"x":4,"y":2,"z":-3,"u":1 ,"v":0},
331 |                       {"x":4,"y":1,"z":-3,"u":1,"v": 0.968 },
332 |                       {"x":4,"y":1,"z":-2,"u":0, "v": 0.968}],
333 |                      [{"x":4,"y":2,"z":-3,"u":0,"v":0},
334 |                       {"x":4,"y":2,"z":-4,"u":1 ,"v":0},
335 |                       {"x":4,"y":1,"z":-4,"u":1,"v": 0.968 },
336 |                       {"x":4,"y":1,"z":-3,"u":0, "v": 0.968}],
337 |                      [{"x":4,"y":1,"z":1,"u":0,"v":0},
338 |                       {"x":4,"y":1,"z":0,"u":1 ,"v":0},
339 |                       {"x":4,"y":0,"z":0,"u":1,"v": 0.968 },
340 |                       {"x":4,"y":0,"z":1,"u":0, "v": 0.968}],
341 |                      [{"x":4,"y":1,"z":0,"u":0,"v":0},
342 |                       {"x":4,"y":1,"z":-1,"u":1 ,"v":0},
343 |                       {"x":4,"y":0,"z":-1,"u":1,"v": 0.968 },
344 |                       {"x":4,"y":0,"z":0,"u":0, "v": 0.968}],
345 |                      [{"x":4,"y":1,"z":-1,"u":0,"v":0},
346 |                       {"x":4,"y":1,"z":-2,"u":1 ,"v":0},
347 |                       {"x":4,"y":0,"z":-2, "u":1,"v": 0.968 },
348 |                       {"x":4,"y":0,"z":-1,"u":0, "v": 0.968}],
349 |                      [{"x":4,"y":1,"z":-2,"u":0,"v":0},
350 |                       {"x":4,"y":1,"z":-3,"u":1 ,"v":0},
351 |                       {"x":4,"y":0,"z":-3,"u":1,"v": 0.968 },
352 |                       {"x":4,"y":0,"z":-2,"u":0, "v": 0.968}],
353 |                      [{"x":4,"y":1,"z":-3,"u":0,"v":0},
354 |                       {"x":4,"y":1,"z":-4,"u":1 ,"v":0},
355 |                       {"x":4,"y":0,"z":-4,"u":1,"v": 0.968 },
356 |                       {"x":4,"y":0,"z":-3,"u":0, "v": 0.968}],
357 |                      [{"x":-4,"y":2,"z":1,"u":0,"v":0},
358 |                       {"x":-3,"y":2,"z":1,"u":1 ,"v":0},
359 |                       {"x":-3,"y":1,"z":1,"u":1,"v": 0.968 },
360 |                       {"x":-4,"y":1,"z":1,"u":0, "v": 0.968}],
361 |                      [{"x":-3,"y":2,"z":1,"u":0,"v":0},
362 |                       {"x":-2,"y":2,"z":1,"u":1 ,"v":0},
363 |                       {"x":-2,"y":1,"z":1,"u":1,"v": 0.968 },
364 |                       {"x":-3,"y":1,"z":1,"u":0, "v": 0.968}],
365 |                      [{"x":-2,"y":2,"z":1,"u":0,"v":0},
366 |                       {"x":-1,"y":2,"z":1,"u":1 ,"v":0},
367 |                       {"x":-1,"y":1,"z":1,"u":1,"v": 0.968 },
368 |                       {"x":-2,"y":1,"z":1,"u":0, "v": 0.968}],
369 |                      [{"x":-1,"y":2,"z":1,"u":0,"v":0},
370 |                       {"x":0,"y":2,"z":1,"u":1 ,"v":0},
371 |                       {"x":0,"y":1,"z":1,"u":1,"v": 0.968 },
372 |                       {"x":-1,"y":1,"z":1,"u":0, "v": 0.968}],
373 |                      [{"x":-4,"y":1,"z":1,"u":0,"v":0},
374 |                       {"x":-3,"y":1,"z":1,"u":1 ,"v":0},
375 |                       {"x":-3,"y":0,"z":1,"u":1,"v": 0.968 },
376 |                       {"x":-4,"y":0,"z":1,"u":0, "v": 0.968}],
377 |                      [{"x":-3,"y":1,"z":1,"u":0,"v":0},
378 |                       {"x":-2,"y":1,"z":1,"u":1 ,"v":0},
379 |                       {"x":-2,"y":0,"z":1,"u":1,"v": 0.968 },
380 |                       {"x":-3,"y":0,"z":1,"u":0, "v": 0.968}],
381 |                      [{"x":-2,"y":1,"z":1,"u":0,"v":0},
382 |                       {"x":-1,"y":1,"z":1,"u":1 ,"v":0},
383 |                       {"x":-1,"y":0,"z":1,"u":1,"v": 0.968 },
384 |                       {"x":-2,"y":0,"z":1,"u":0, "v": 0.968}],
385 |                      [{"x":-1,"y":1,"z":1,"u":0,"v":0},
386 |                       {"x":0,"y":1,"z":1,"u":1 ,"v":0},
387 |                       {"x":0,"y":0,"z":1,"u":1,"v": 0.968 },
388 |                       {"x":-1,"y":0,"z":1,"u":0, "v": 0.968}],
389 |                      [{"x":0,"y":2,"z":1,"u":0,"v":0},
390 |                       {"x":1,"y":2,"z":1,"u":1 ,"v":0},
391 |                       {"x":1,"y":1,"z":1,"u":1,"v":0.968},
392 |                       {"x":0,"y":1,"z":1,"u":0, "v":0.968}],
393 |                      [{"x":1,"y":2,"z":1,"u":0,"v":0},
394 |                       {"x":2,"y":2,"z":1,"u":1 ,"v":0},
395 |                       {"x":2,"y":1,"z":1,"u":1,"v": 0.968 },
396 |                       {"x":1,"y":1,"z":1,"u":0, "v": 0.968}],
397 |                      [{"x":2,"y":2,"z":1,"u":0,"v":0},
398 |                       {"x":3,"y":2,"z":1,"u":1 ,"v":0},
399 |                       {"x":3,"y":1,"z":1,"u":1,"v": 0.968 },
400 |                       {"x":2,"y":1,"z":1,"u":0, "v": 0.968}],
401 |                      [{"x":3,"y":2,"z":1,"u":0,"v":0},
402 |                       {"x":4,"y":2,"z":1,"u":1 ,"v":0},
403 |                       {"x":4,"y":1,"z":1,"u":1,"v": 0.968 },
404 |                       {"x":3,"y":1,"z":1,"u":0, "v": 0.968}],
405 |                      [{"x":1,"y":1,"z":1,"u":0,"v":0},
406 |                       {"x":2,"y":1,"z":1,"u":1 ,"v":0},
407 |                       {"x":2,"y":0,"z":1,"u":1,"v": 0.968 },
408 |                       {"x":1,"y":0,"z":1,"u":0, "v": 0.968}],
409 |                      [{"x":2,"y":1,"z":1,"u":0,"v":0},
410 |                       {"x":3,"y":1,"z":1,"u":1 ,"v":0},
411 |                       {"x":3,"y":0,"z":1,"u":1,"v": 0.968 },
412 |                       {"x":2,"y":0,"z":1,"u":0, "v": 0.968}],
413 |                      [{"x":3,"y":1,"z":1,"u":0,"v":0},
414 |                       {"x":4,"y":1,"z":1,"u":1 ,"v":0},
415 |                       {"x":4,"y":0,"z":1,"u":1,"v": 0.968 },
416 |                       {"x":3,"y":0,"z":1,"u":0, "v": 0.968}],
417 |                      [{"x":0,"y":1,"z":1,"u":0,"v":0},
418 |                       {"x":1,"y":1,"z":1,"u":1 ,"v":0},
419 |                       {"x":1,"y":0,"z":1,"u":1,"v":0.968},
420 |                       {"x":0,"y":0,"z":1,"u":0, "v":0.968}]],
421 |  "ceiling":         [[{"x":-4,"y":2,"z":-4,"u":0,"v":0},
422 |                       {"x":-2,"y":2,"z":-4,"u":1 ,"v":0},
423 |                       {"x":-2,"y":2,"z":-3,"u":1,"v": 1 },
424 |                       {"x":-4,"y":2,"z":-3,"u":0, "v": 1}],
425 |                      [{"x":-2,"y":2,"z":-4,"u":0,"v":0},
426 |                       {"x":0,"y":2,"z":-4,"u":1 ,"v":0},
427 |                       {"x":0,"y":2,"z":-3,"u":1,"v": 1 },
428 |                       {"x":-2,"y":2,"z":-3,"u":0, "v": 1}],
429 |                      [{"x":0,"y":2,"z":-4,"u":0,"v":0},
430 |                       {"x":2,"y":2,"z":-4,"u":1 ,"v":0},
431 |                       {"x":2,"y":2,"z":-3,"u":1,"v": 1 },
432 |                       {"x":0,"y":2,"z":-3,"u":0, "v": 1}],
433 |                      [{"x":2,"y":2,"z":-4,"u":0,"v":0},
434 |                       {"x":4,"y":2,"z":-4,"u":1 ,"v":0},
435 |                       {"x":4,"y":2,"z":-3,"u":1,"v": 1 },
436 |                       {"x":2,"y":2,"z":-3,"u":0, "v": 1}],
437 |                      [{"x":-4,"y":2,"z":-3,"u":0,"v":0},
438 |                       {"x":-2,"y":2,"z":-3,"u":1 ,"v":0},
439 |                       {"x":-2,"y":2,"z":-2,"u":1,"v": 1 },
440 |                       {"x":-4,"y":2,"z":-2,"u":0, "v": 1}],
441 |                      [{"x":-2,"y":2,"z":-3,"u":0,"v":0},
442 |                       {"x":0,"y":2,"z":-3,"u":1 ,"v":0},
443 |                       {"x":0,"y":2,"z":-2,"u":1,"v": 1 },
444 |                       {"x":-2,"y":2,"z":-2,"u":0, "v": 1}],
445 |                      [{"x":0,"y":2,"z":-3,"u":0,"v":0},
446 |                       {"x":2,"y":2,"z":-3,"u":1 ,"v":0},
447 |                       {"x":2,"y":2,"z":-2,"u":1,"v": 1 },
448 |                       {"x":0,"y":2,"z":-2,"u":0, "v": 1}],
449 |                      [{"x":2,"y":2,"z":-3,"u":0,"v":0},
450 |                       {"x":4,"y":2,"z":-3,"u":1 ,"v":0},
451 |                       {"x":4,"y":2,"z":-2,"u":1,"v": 1 },
452 |                       {"x":2,"y":2,"z":-2,"u":0, "v": 1}],
453 |                      [{"x":-4,"y":2,"z":-2,"u":0,"v":0},
454 |                       {"x":-2,"y":2,"z":-2,"u":1 ,"v":0},
455 |                       {"x":-2,"y":2,"z":-1,"u":1,"v": 1 },
456 |                       {"x":-4,"y":2,"z":-1,"u":0, "v": 1}],
457 |                      [{"x":-2,"y":2,"z":-2,"u":0,"v":0},
458 |                       {"x":0,"y":2,"z":-2,"u":1 ,"v":0},
459 |                       {"x":0,"y":2,"z":-1,"u":1,"v": 1 },
460 |                       {"x":-2,"y":2,"z":-1,"u":0, "v": 1}],
461 |                      [{"x":0,"y":2,"z":-2,"u":0,"v":0},
462 |                       {"x":2,"y":2,"z":-2,"u":1 ,"v":0},
463 |                       {"x":2,"y":2,"z":-1,"u":1,"v": 1 },
464 |                       {"x":0,"y":2,"z":-1,"u":0, "v": 1}],
465 |                      [{"x":2,"y":2,"z":-2,"u":0,"v":0},
466 |                       {"x":4,"y":2,"z":-2,"u":1 ,"v":0},
467 |                       {"x":4,"y":2,"z":-1,"u":1,"v": 1 },
468 |                       {"x":2,"y":2,"z":-1,"u":0, "v": 1}],
469 |                      [{"x":-4,"y":2,"z":-1,"u":0,"v":0},
470 |                       {"x":-2,"y":2,"z":-1,"u":1 ,"v":0},
471 |                       {"x":-2,"y":2,"z":0,"u":1,"v": 1 },
472 |                       {"x":-4,"y":2,"z":0,"u":0, "v": 1}],
473 |                      [{"x":-2,"y":2,"z":-1,"u":0,"v":0},
474 |                       {"x":0,"y":2,"z":-1,"u":1 ,"v":0},
475 |                       {"x":0,"y":2,"z":0,"u":1,"v": 1 },
476 |                       {"x":-2,"y":2,"z":0,"u":0, "v": 1}],
477 |                      [{"x":0,"y":2,"z":-1,"u":0,"v":0},
478 |                       {"x":2,"y":2,"z":-1,"u":1 ,"v":0},
479 |                       {"x":2,"y":2,"z":0,"u":1,"v": 1 },
480 |                       {"x":0,"y":2,"z":0,"u":0, "v": 1}],
481 |                      [{"x":2,"y":2,"z":-1,"u":0,"v":0},
482 |                       {"x":4,"y":2,"z":-1,"u":1 ,"v":0},
483 |                       {"x":4,"y":2,"z":0,"u":1,"v": 1 },
484 |                       {"x":2,"y":2,"z":0,"u":0, "v": 1}],
485 |                      [{"x":-4,"y":2,"z":0,"u":0,"v":0},
486 |                       {"x":-2,"y":2,"z":0,"u":1 ,"v":0},
487 |                       {"x":-2,"y":2,"z":1,"u":1,"v": 1 },
488 |                       {"x":-4,"y":2,"z":1,"u":0, "v": 1}],
489 |                      [{"x":-2,"y":2,"z":0,"u":0,"v":0},
490 |                       {"x":0,"y":2,"z":0,"u":1 ,"v":0},
491 |                       {"x":0,"y":2,"z":1,"u":1,"v": 1 },
492 |                       {"x":-2,"y":2,"z":1,"u":0, "v": 1}],
493 |                      [{"x":0,"y":2,"z":0,"u":0,"v":0},
494 |                       {"x":2,"y":2,"z":0,"u":1 ,"v":0},
495 |                       {"x":2,"y":2,"z":1,"u":1,"v": 1 },
496 |                       {"x":0,"y":2,"z":1,"u":0, "v": 1}],
497 |                      [{"x":2,"y":2,"z":0,"u":0,"v":0},
498 |                       {"x":4,"y":2,"z":0,"u":1 ,"v":0},
499 |                       {"x":4,"y":2,"z":1,"u":1,"v": 1 },
500 |                       {"x":2,"y":2,"z":1,"u":0, "v": 1}],
501 |                      [{"x":-4,"y":2,"z":-9,"u":0,"v":0},
502 |                       {"x":-2,"y":2,"z":-9,"u":1 ,"v":0},
503 |                       {"x":-2,"y":2,"z":-8,"u":1,"v": 1 },
504 |                       {"x":-4,"y":2,"z":-8,"u":0, "v": 1}],
505 |                      [{"x":-2,"y":2,"z":-9,"u":0,"v":0},
506 |                       {"x":0,"y":2,"z":-9,"u":1 ,"v":0},
507 |                       {"x":0,"y":2,"z":-8,"u":1,"v": 1 },
508 |                       {"x":-2,"y":2,"z":-8,"u":0, "v": 1}],
509 |                      [{"x":0,"y":2,"z":-9,"u":0,"v":0},
510 |                       {"x":2,"y":2,"z":-9,"u":1 ,"v":0},
511 |                       {"x":2,"y":2,"z":-8,"u":1,"v": 1 },
512 |                       {"x":0,"y":2,"z":-8,"u":0, "v": 1}],
513 |                      [{"x":2,"y":2,"z":-9,"u":0,"v":0},
514 |                       {"x":4,"y":2,"z":-9,"u":1 ,"v":0},
515 |                       {"x":4,"y":2,"z":-8,"u":1,"v": 1 },
516 |                       {"x":2,"y":2,"z":-8,"u":0, "v": 1}],
517 |                      [{"x":-4,"y":2,"z":-8,"u":0,"v":0},
518 |                       {"x":-2,"y":2,"z":-8,"u":1 ,"v":0},
519 |                       {"x":-2,"y":2,"z":-7,"u":1,"v": 1 },
520 |                       {"x":-4,"y":2,"z":-7,"u":0, "v": 1}],
521 |                      [{"x":-2,"y":2,"z":-8,"u":0,"v":0},
522 |                       {"x":0,"y":2,"z":-8,"u":1 ,"v":0},
523 |                       {"x":0,"y":2,"z":-7,"u":1,"v": 1 },
524 |                       {"x":-2,"y":2,"z":-7,"u":0, "v": 1}],
525 |                      [{"x":0,"y":2,"z":-8,"u":0,"v":0},
526 |                       {"x":2,"y":2,"z":-8,"u":1 ,"v":0},
527 |                       {"x":2,"y":2,"z":-7,"u":1,"v": 1 },
528 |                       {"x":0,"y":2,"z":-7,"u":0, "v": 1}],
529 |                      [{"x":2,"y":2,"z":-8,"u":0,"v":0},
530 |                       {"x":4,"y":2,"z":-8,"u":1 ,"v":0},
531 |                       {"x":4,"y":2,"z":-7,"u":1,"v": 1 },
532 |                       {"x":2,"y":2,"z":-7,"u":0, "v": 1}],
533 |                      [{"x":-4,"y":2,"z":-7,"u":0,"v":0},
534 |                       {"x":-2,"y":2,"z":-7,"u":1 ,"v":0},
535 |                       {"x":-2,"y":2,"z":-6,"u":1,"v": 1 },
536 |                       {"x":-4,"y":2,"z":-6,"u":0, "v": 1}],
537 |                      [{"x":-2,"y":2,"z":-7,"u":0,"v":0},
538 |                       {"x":0,"y":2,"z":-7,"u":1 ,"v":0},
539 |                       {"x":0,"y":2,"z":-6,"u":1,"v": 1 },
540 |                       {"x":-2,"y":2,"z":-6,"u":0, "v": 1}],
541 |                      [{"x":0,"y":2,"z":-7,"u":0,"v":0},
542 |                       {"x":2,"y":2,"z":-7,"u":1 ,"v":0},
543 |                       {"x":2,"y":2,"z":-6,"u":1,"v": 1 },
544 |                       {"x":0,"y":2,"z":-6,"u":0, "v": 1}],
545 |                      [{"x":2,"y":2,"z":-7,"u":0,"v":0},
546 |                       {"x":4,"y":2,"z":-7,"u":1 ,"v":0},
547 |                       {"x":4,"y":2,"z":-6,"u":1,"v": 1 },
548 |                       {"x":2,"y":2,"z":-6,"u":0, "v": 1}],
549 |                      [{"x":-4,"y":2,"z":-6,"u":0,"v":0},
550 |                       {"x":-2,"y":2,"z":-6,"u":1 ,"v":0},
551 |                       {"x":-2,"y":2,"z":-5,"u":1,"v": 1 },
552 |                       {"x":-4,"y":2,"z":-5,"u":0, "v": 1}],
553 |                      [{"x":-2,"y":2,"z":-6,"u":0,"v":0},
554 |                       {"x":0,"y":2,"z":-6,"u":1 ,"v":0},
555 |                       {"x":0,"y":2,"z":-5,"u":1,"v": 1 },
556 |                       {"x":-2,"y":2,"z":-5,"u":0, "v": 1}],
557 |                      [{"x":0,"y":2,"z":-6,"u":0,"v":0},
558 |                       {"x":2,"y":2,"z":-6,"u":1 ,"v":0},
559 |                       {"x":2,"y":2,"z":-5,"u":1,"v": 1 },
560 |                       {"x":0,"y":2,"z":-5,"u":0, "v": 1}],
561 |                      [{"x":2,"y":2,"z":-6,"u":0,"v":0},
562 |                       {"x":4,"y":2,"z":-6,"u":1 ,"v":0},
563 |                       {"x":4,"y":2,"z":-5,"u":1,"v": 1 },
564 |                       {"x":2,"y":2,"z":-5,"u":0, "v": 1}]]}


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson02.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../../config/boot', __FILE__)
 2 | 
 3 | class Window < Gosu::Window
 4 |   def initialize
 5 |     super(800, 600, false)
 6 |     self.caption = "Lesson #2 - Polygons"
 7 |   end
 8 | 
 9 |   def update
10 |   end
11 | 
12 |   def draw
13 |     gl do
14 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # see lesson01
15 |       glMatrixMode(GL_PROJECTION) # see lesson01
16 |       glLoadIdentity  # see lesson01
17 |       gluPerspective(45.0, width / height, 0.1, 100.0) # see lesson01
18 |       glMatrixMode(GL_MODELVIEW) # see lesson01
19 |       glLoadIdentity # see lesson01
20 | 
21 |       glTranslatef(-2, 0, -10) # see lesson01
22 | 
23 |       glBegin(GL_TRIANGLES) # see lesson01
24 |         glVertex3f( 0,  1, 0) # see lesson01
25 |         glVertex3f( 1, -1, 0)
26 |         glVertex3f(-1, -1, 0)
27 |       glEnd
28 |     end
29 |   end
30 | 
31 |   def button_down(id)
32 |     if id == Gosu::KbEscape
33 |       close
34 |     end
35 |   end
36 | end
37 | 
38 | window = Window.new
39 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson03.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../../config/boot', __FILE__)
 2 | 
 3 | class Window < Gosu::Window
 4 |   def initialize
 5 |     super(800, 600, false)
 6 |     self.caption = "Lesson #3 - Adding colors"
 7 |   end
 8 | 
 9 |   def update
10 |   end
11 | 
12 |   def draw
13 |     gl do
14 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) #explained in nehe lesson02 [see lesson01]
15 | 
16 |       glMatrixMode(GL_PROJECTION) # see lesson01
17 |       glLoadIdentity  # see lesson01
18 | 
19 |       gluPerspective(45.0, width / height, 0.1, 100.0) # see lesson01
20 | 
21 |       glMatrixMode(GL_MODELVIEW) # see lesson01
22 |       glLoadIdentity # see lesson01
23 | 
24 |       glTranslatef(-2, 0, -10) # see lesson01
25 | 
26 |       glBegin(GL_TRIANGLES) # see lesson01
27 |         glColor3f(1, 0, 0) # sets color to be used using RBG
28 |         glVertex3f( 0,1, 0)
29 |         glColor3f(0, 1, 0)
30 |         glVertex3f( 1, -1, 0)
31 |         glColor3f(0, 0, 1)
32 |         glVertex3f(-1, -1, 0)
33 |       glEnd
34 |     end
35 |   end
36 | 
37 |   def button_down(id)
38 |     if id == Gosu::KbEscape
39 |       close
40 |     end
41 |   end
42 | end
43 | 
44 | window = Window.new
45 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson04.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../../config/boot', __FILE__)
 2 | 
 3 | class Window < Gosu::Window
 4 |   attr_accessor :rotation_angle
 5 | 
 6 |   def initialize
 7 |     super(800, 600, false)
 8 |     self.caption = "Lesson #4 - Rotation animation"
 9 |     @rotation_angle = 0
10 |   end
11 | 
12 |   def update
13 |     @rotation_angle += 0.2
14 |   end
15 | 
16 |   def draw
17 |     gl do
18 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # see lesson01
19 | 
20 |       glMatrixMode(GL_PROJECTION) # see lesson01
21 |       glLoadIdentity
22 | 
23 |       gluPerspective(45.0, width / height, 0.1, 100.0) # see lesson01
24 | 
25 |       glMatrixMode(GL_MODELVIEW) # see lesson01
26 |       glLoadIdentity # see lesson01
27 | 
28 |       glTranslatef(-2, 0, -10) # see lesson01
29 | 
30 |       glRotatef(@rotation_angle, 0, 1, 0) # rotate object around vector set by traveling to x,y,z from current unit, angle is in degrees
31 | 
32 |       glBegin(GL_TRIANGLES) # see lesson01
33 |         glColor3f(1, 0, 0) #  see nehe03
34 |         glVertex3f( 0,1, 0)
35 |         glColor3f(0, 1, 0)
36 |         glVertex3f( 1, -1, 0)
37 |         glColor3f(0, 0, 1)
38 |         glVertex3f(-1, -1, 0)
39 |       glEnd
40 |     end
41 |   end
42 | 
43 |   def button_down(id)
44 |     close if id == Gosu::KbEscape
45 |   end
46 | end
47 | 
48 | window = Window.new
49 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson05.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../../config/boot', __FILE__)
 2 | 
 3 | class Window < Gosu::Window
 4 |   attr_accessor :rotation_angle
 5 | 
 6 |   def initialize
 7 |     super(800, 600, false)
 8 |     self.caption = "Lesson #5 - 3D Shapes"
 9 |     @rotation_angle = 0
10 |   end
11 | 
12 |   def update
13 |     @rotation_angle += 0.2
14 |   end
15 | 
16 |   def draw
17 |     gl do
18 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # see lesson01
19 | 
20 |       glMatrixMode(GL_PROJECTION) # see lesson01
21 |       glLoadIdentity  # see lesson01
22 | 
23 |       gluPerspective(45.0, width / height, 0.1, 100.0) # see lesson01
24 | 
25 |       glMatrixMode(GL_MODELVIEW) # see lesson01
26 |       glLoadIdentity # see lesson01
27 | 
28 |       glTranslatef(0, 0, -7) # see lesson01
29 | 
30 |       glRotatef(@rotation_angle, 0.0, 1.0, 0.0) # see nehe04
31 | 
32 |       glBegin(GL_TRIANGLES) # see lesson01
33 |         glColor3f(1, 0, 0)
34 |         glVertex3f( 0,  1, 0)
35 |         glColor3f(0, 1, 0)
36 |         glVertex3f(-1, -1, 1)
37 |         glColor3f(0, 0, 1)
38 |         glVertex3f(1, -1, 1)
39 | 
40 |         glColor3f(1, 0, 0)
41 |         glVertex3f( 0,  1, 0)
42 |         glColor3f(0, 1, 0)
43 |         glVertex3f( 1, -1, 1)
44 |         glColor3f(0, 0, 1)
45 |         glVertex3f(1, -1, -1)
46 | 
47 |         glColor3f(1, 0, 0)
48 |         glVertex3f( 0,  1, 0)
49 |         glColor3f(0, 0, 1)
50 |         glVertex3f(-1, -1, 1)
51 |         glColor3f(0, 0, 1)
52 |         glVertex3f(-1, -1, -1)
53 | 
54 |         glColor3f(1, 0, 0)
55 |         glVertex3f( 0,  1, 0)
56 |         glColor3f(0, 1, 0)
57 |         glVertex3f(-1, -1, -1)
58 |         glColor3f(0, 0, 1)
59 |         glVertex3f(1, -1, -1)
60 |       glEnd
61 | 
62 |       glColor3f(1, 0, 0)
63 |       glBegin(GL_QUADS)
64 |         glVertex3f(1, -1, 1)
65 |         glVertex3f(1, -1, -1)
66 |         glVertex3f(-1, -1, -1)
67 |         glVertex3f(-1, -1, 1)
68 |       glEnd
69 |     end
70 |   end
71 | 
72 |   def button_down(id)
73 |     close if id == Gosu::KbEscape
74 |   end
75 | end
76 | 
77 | window = Window.new
78 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson06.rb:
--------------------------------------------------------------------------------
 1 | require File.expand_path('../../config/boot', __FILE__)
 2 | 
 3 | class Texture
 4 |   attr_accessor :info
 5 |   def initialize(window)
 6 |     @image = Gosu::Image.new(window, "resources/nehe/lesson06/ruby.png", true)
 7 |     @info = @image.gl_tex_info
 8 |   end
 9 | end
10 | class Window < Gosu::Window
11 | 
12 |   def initialize
13 |     super(800, 600, false)
14 |     self.caption = "Lesson #6 - Texture Mapping"
15 |     @texture = Texture.new(self)
16 |     @texture_info = @texture.info
17 |     @x_angle = @y_angle = @z_angle = 0
18 |   end
19 | 
20 |   def update
21 |     @x_angle += 0.3
22 |     @y_angle += 0.2
23 |     @z_angle += 0.4
24 |   end
25 | 
26 |   def draw
27 |     gl do
28 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) #see lesson 01
29 | 
30 |       glEnable(GL_DEPTH_TEST) # enables depth testing
31 | 
32 |       # Our depth function. Everything that is less or equal the actual value gets drawn. Depth buffet value is 1/z
33 |       glDepthFunc(GL_LEQUAL)
34 | 
35 |       glMatrixMode(GL_PROJECTION) #see lesson01
36 |       glLoadIdentity # see lesson01
37 | 
38 |       gluPerspective(45.0, width / height, 0.1, 100.0) #see lesson 01
39 |       glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST) #Perspective correction calculation for most correct/highest quality value
40 |       glMatrixMode(GL_MODELVIEW)  #see lesson 01
41 |       glLoadIdentity #see lesson 01
42 | 
43 |       glTranslate(0, 0, -10) #see lesson 01
44 | 
45 |       glEnable(GL_TEXTURE_2D) #see lesson 01
46 |       glBindTexture(GL_TEXTURE_2D, @texture_info.tex_name) #see lesson 01
47 | 
48 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR) #linear filter when image is larger than actual texture
49 |       glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR) #linear filter when image is smaller than actual texture
50 |       glRotatef(@x_angle, 1, 0, 0) # see nehe04
51 |       glRotatef(@y_angle, 0, 1, 0) # see nehe04
52 |       glRotatef(@z_angle, 0, 0, 1) # see nehe04
53 | 
54 |       glBegin(GL_QUADS)
55 |         glTexCoord2f(0, 0); glVertex3f(-1, -1,  1) # see lesson 01
56 |         glTexCoord2f(1, 0); glVertex3f( 1, -1,  1)
57 |         glTexCoord2f(1, 1); glVertex3f( 1,  1,  1)
58 |         glTexCoord2f(0, 1); glVertex3f(-1,  1,  1)
59 |         glTexCoord2f(1, 0); glVertex3f(-1, -1, -1)
60 |         glTexCoord2f(1, 1); glVertex3f(-1,  1, -1)
61 |         glTexCoord2f(0, 1); glVertex3f( 1,  1, -1)
62 |         glTexCoord2f(0, 0); glVertex3f( 1, -1, -1)
63 | 
64 |         glTexCoord2f(0, 1); glVertex3f(-1,  1, -1)
65 |         glTexCoord2f(0, 0); glVertex3f(-1,  1,  1)
66 |         glTexCoord2f(1, 0); glVertex3f( 1,  1,  1)
67 |         glTexCoord2f(1, 1); glVertex3f( 1,  1, -1)
68 | 
69 |         glTexCoord2f(1, 1); glVertex3f(-1, -1, -1)
70 |         glTexCoord2f(0, 1); glVertex3f( 1, -1, -1)
71 |         glTexCoord2f(0, 0); glVertex3f( 1, -1,  1)
72 |         glTexCoord2f(1, 0); glVertex3f(-1, -1,  1)
73 | 
74 |         glTexCoord2f(1, 0); glVertex3f( 1, -1, -1)
75 |         glTexCoord2f(1, 1); glVertex3f( 1,  1, -1)
76 |         glTexCoord2f(0, 1); glVertex3f( 1,  1,  1)
77 |         glTexCoord2f(0, 0); glVertex3f( 1, -1,  1)
78 | 
79 |         glTexCoord2f(0, 0); glVertex3f(-1, -1, -1)
80 |         glTexCoord2f(1, 0); glVertex3f(-1, -1,  1)
81 |         glTexCoord2f(1, 1); glVertex3f(-1,  1,  1)
82 |         glTexCoord2f(0, 1); glVertex3f(-1,  1, -1)
83 |       glEnd
84 |     end
85 |   end
86 | 
87 |   def button_down(id)
88 |     if id == Gosu::KbEscape
89 |       close
90 |     end
91 |   end
92 | end
93 | 
94 | window = Window.new
95 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson07.rb:
--------------------------------------------------------------------------------
  1 | require File.expand_path('../../config/boot', __FILE__)
  2 | 
  3 | class Texture
  4 |   attr_accessor :info
  5 |   def initialize(window)
  6 |     @image = Gosu::Image.new(window, "resources/nehe/lesson07/crate.png", true)
  7 |     @info = @image.gl_tex_info
  8 |   end
  9 | end
 10 | 
 11 | class Window < Gosu::Window
 12 |   attr_accessor :current_filter
 13 | 
 14 |   def initialize
 15 |     super(800, 600, false)
 16 |     self.caption = "Lesson #7 - Texture Filters, Lighting and Keyboard Control"
 17 |     initialize_light
 18 |     initialize_textures
 19 |     @x_angle  = @y_angle = 0
 20 |     @x_change  = @y_change = 0.2
 21 |     @z_depth  = -5
 22 |     @light_on = false
 23 |   end
 24 | 
 25 |   def initialize_light
 26 |     @ambient_light = [0.5, 0.5, 0.5, 1] # ambient light - lights all objects on the scene equally, format is RGBA
 27 |     @diffuse_light = [1, 1, 1, 1] # diffuse light is created by the light source and reflects off the surface of an object, format is also RGBA
 28 |     @light_postion = [0, 0, 2, 1] # position of the light source from the current point
 29 |   end
 30 | 
 31 |   def initialize_textures
 32 |     glGetError
 33 |     #note that window needs to keep texture variables and not just tex_name which is a fixnum in order to
 34 |     #reference texture and prevent it collected by the GC
 35 |     @nearest = Texture.new(self)
 36 |     glBindTexture(GL_TEXTURE_2D, @nearest.info.tex_name); # see lesson 1
 37 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST) # Nearest filter is the worst on quality
 38 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST) # but fastest and lowest need for processing power
 39 | 
 40 |     @linear = Texture.new(self)
 41 |     glBindTexture(GL_TEXTURE_2D, @linear.info.tex_name);
 42 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR) # Linear filter, good quality - high demands see nehe06
 43 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR)
 44 | 
 45 |     @minimap = Texture.new(self)
 46 |     glBindTexture(GL_TEXTURE_2D, @minimap.info.tex_name);
 47 |     texture = glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_FLOAT) #use texture data to get data for buildimg a mipmap
 48 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)
 49 |     # Mipmapping. OpenGL tried to build different sized high quality texture. When you draw it OpenGL will select the best
 50 |     # looking texture from ones it built and draw that instead of resizing the original image which can cause detail loss
 51 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST)
 52 |     gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB, GL_FLOAT, texture) # building mipmaps
 53 |     @filters = [@nearest.info.tex_name, @linear.info.tex_name, @minimap.info.tex_name]
 54 |   end
 55 | 
 56 |   def update
 57 |     @z_depth -= 0.2 if button_down? Gosu::Button::KbPageUp
 58 |     @z_depth += 0.2 if button_down? Gosu::Button::KbPageDown
 59 |     @x_change -= 0.01 if button_down? Gosu::Button::KbUp
 60 |     @x_change += 0.01 if button_down? Gosu::Button::KbDown
 61 |     @y_change -= 0.01 if button_down? Gosu::Button::KbLeft
 62 |     @y_change += 0.01 if button_down? Gosu::Button::KbRight
 63 |     @x_angle += @x_change
 64 |     @y_angle += @y_change
 65 |   end
 66 | 
 67 |   def change_filter!
 68 |     index = @filters.index(current_filter)
 69 |     index > 1 ? index = 0 : index += 1
 70 |     @current_filter = @filters[index]
 71 |   end
 72 | 
 73 |   def current_filter
 74 |     @current_filter ||= @filters.first
 75 |   end
 76 | 
 77 |   def draw
 78 |     gl do
 79 |       glClearColor(0,0,0,0.5) #see lesson 01
 80 |       glClearDepth(1) #see lesson 01
 81 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) #see lesson 01
 82 |       glEnable(GL_DEPTH_TEST) # see nehe06
 83 |       glDepthFunc(GL_LEQUAL) # see nehe06
 84 | 
 85 |       glMatrixMode(GL_PROJECTION) #see lesson01
 86 |       glLoadIdentity # see lesson01
 87 |       gluPerspective(45.0, width / height, 0.1, 100.0) #see lesson 01
 88 |       glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST) #Perspective correction calculation for most correct/highest quality value
 89 |       glMatrixMode(GL_MODELVIEW)  #see lesson 01
 90 |       glLoadIdentity #see lesson 01
 91 | 
 92 | 
 93 |       glEnable(GL_TEXTURE_2D) #see lesson01
 94 |       glShadeModel(GL_SMOOTH) # selects smooth shading
 95 |       glLightfv(GL_LIGHT1, GL_AMBIENT, @ambient_light) # sets ambient light for light source
 96 |       glLightfv(GL_LIGHT1, GL_DIFFUSE, @diffuse_light) # sets diffuse light for light source
 97 |       glLightfv(GL_LIGHT1, GL_POSITION, @light_postion) # sets position of light
 98 |       glEnable(GL_LIGHT1) # enables prepared light source
 99 |       @light_on ? glEnable(GL_LIGHTING) : glDisable(GL_LIGHTING) # enables / disables lighting of the scene based on light switch
100 |       glTranslate(0, 0, @z_depth) #see lesson 01
101 | 
102 |       glBindTexture(GL_TEXTURE_2D, current_filter) #see lesson 01
103 |       glRotatef(@x_angle, 1, 0, 0) # see nehe04
104 |       glRotatef(@y_angle, 0, 1, 0) # see nehe04
105 | 
106 |       glBegin(GL_QUADS)
107 |         # normal pointing to viewer. Normal is a line from the middle of the polygon at 90 degree angle. It is needed to tell opengl which
108 |         # direction the polygon is facing.
109 |         glNormal3f(0, 0, 1)
110 |         glTexCoord2f(0, 0); glVertex3f(-1, -1,  1) # see lesson 01
111 |         glTexCoord2f(1, 0); glVertex3f( 1, -1,  1)
112 |         glTexCoord2f(1, 1); glVertex3f( 1,  1,  1)
113 |         glTexCoord2f(0, 1); glVertex3f(-1,  1,  1)
114 | 
115 |         glNormal3f(0, 0, -1) # normal point away from viewer
116 |         glTexCoord2f(1, 0); glVertex3f(-1, -1, -1)
117 |         glTexCoord2f(1, 1); glVertex3f(-1,  1, -1)
118 |         glTexCoord2f(0, 1); glVertex3f( 1,  1, -1)
119 |         glTexCoord2f(0, 0); glVertex3f( 1, -1, -1)
120 | 
121 |         glNormal3f(0, 1, 0)
122 |         glTexCoord2f(0, 1); glVertex3f(-1,  1, -1)
123 |         glTexCoord2f(0, 0); glVertex3f(-1,  1,  1)
124 |         glTexCoord2f(1, 0); glVertex3f( 1,  1,  1)
125 |         glTexCoord2f(1, 1); glVertex3f( 1,  1, -1)
126 | 
127 |         glNormal3f(0, -1, 0)
128 |         glTexCoord2f(1, 1); glVertex3f(-1, -1, -1)
129 |         glTexCoord2f(0, 1); glVertex3f( 1, -1, -1)
130 |         glTexCoord2f(0, 0); glVertex3f( 1, -1,  1)
131 |         glTexCoord2f(1, 0); glVertex3f(-1, -1,  1)
132 | 
133 |         glNormal3f(1, 0, 0)
134 |         glTexCoord2f(1, 0); glVertex3f( 1, -1, -1)
135 |         glTexCoord2f(1, 1); glVertex3f( 1,  1, -1)
136 |         glTexCoord2f(0, 1); glVertex3f( 1,  1,  1)
137 |         glTexCoord2f(0, 0); glVertex3f( 1, -1,  1)
138 | 
139 |         glNormal3f(-1, 0, 0)
140 |         glTexCoord2f(0, 0); glVertex3f(-1, -1, -1)
141 |         glTexCoord2f(1, 0); glVertex3f(-1, -1,  1)
142 |         glTexCoord2f(1, 1); glVertex3f(-1,  1,  1)
143 |         glTexCoord2f(0, 1); glVertex3f(-1,  1, -1)
144 |       glEnd
145 |     end
146 |   end
147 | 
148 |   def button_down(id)
149 |     case id
150 |     when Gosu::Button::KbEscape then close
151 |     when Gosu::Button::KbL then @light_on = !@light_on # switch light on or off is L is pressed
152 |     when Gosu::Button::KbF then change_filter! # change filter if F is pressed
153 |     end
154 |   end
155 | end
156 | 
157 | window = Window.new
158 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson08.rb:
--------------------------------------------------------------------------------
  1 | require File.expand_path('../../config/boot', __FILE__)
  2 | 
  3 | class Texture
  4 |   attr_accessor :info
  5 |   def initialize(window)
  6 |     @image = Gosu::Image.new(window, "resources/nehe/lesson08/Glass.bmp", true)
  7 |     @info = @image.gl_tex_info
  8 |   end
  9 | end
 10 | 
 11 | class Window < Gosu::Window
 12 |   attr_accessor :current_filter
 13 | 
 14 |   def initialize
 15 |     super(800, 600, false)
 16 |     self.caption = "Lesson #8 - Texture blending, transparency"
 17 |     initialize_light
 18 |     initialize_textures
 19 |     @x_angle  = @y_angle = 0
 20 |     @x_change  = @y_change = 0.2
 21 |     @z_depth  = -5
 22 |     @light_on = false
 23 |     @blending
 24 |   end
 25 | 
 26 |   def initialize_light
 27 |     @ambient_light = [0.5, 0.5, 0.5, 1] # see nehe07
 28 |     @diffuse_light = [1, 1, 1, 1] # see nehe07
 29 |     @light_postion = [0, 0, 2, 1] # see nehe07
 30 |   end
 31 | 
 32 |   def initialize_textures
 33 |     glGetError
 34 |     @nearest = Texture.new(self)
 35 |     glBindTexture(GL_TEXTURE_2D, @nearest.info.tex_name) # see lesson 1
 36 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST) # see nehe07
 37 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST) # see nehe07
 38 | 
 39 |     @linear = Texture.new(self)
 40 |     glBindTexture(GL_TEXTURE_2D, @linear.info.tex_name)
 41 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR) # see nehe06
 42 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR)
 43 | 
 44 |     @minimap = Texture.new(self)
 45 |     glBindTexture(GL_TEXTURE_2D, @minimap.info.tex_name)
 46 |     texture = glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_FLOAT) # see nehe07
 47 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)
 48 | 
 49 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST) # see nehe07
 50 |     gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 128, 128, GL_RGB, GL_FLOAT, texture) # see nehe07
 51 |     @filters = [@nearest.info.tex_name, @linear.info.tex_name, @minimap.info.tex_name]
 52 |   end
 53 | 
 54 |   def update
 55 |     @z_depth -= 0.2 if button_down? Gosu::Button::KbPageUp
 56 |     @z_depth += 0.2 if button_down? Gosu::Button::KbPageDown
 57 |     @x_change -= 0.01 if button_down? Gosu::Button::KbUp
 58 |     @x_change += 0.01 if button_down? Gosu::Button::KbDown
 59 |     @y_change -= 0.01 if button_down? Gosu::Button::KbLeft
 60 |     @y_change += 0.01 if button_down? Gosu::Button::KbRight
 61 |     @x_angle += @x_change
 62 |     @y_angle += @y_change
 63 |   end
 64 | 
 65 |   def change_filter!
 66 |     index = @filters.index(current_filter)
 67 |     index > 1 ? index = 0 : index += 1
 68 |     @current_filter = @filters[index]
 69 |   end
 70 | 
 71 |   def current_filter
 72 |     @current_filter ||= @filters.first
 73 |   end
 74 | 
 75 |   def draw
 76 |     gl do
 77 |       glClearColor(0,0,0,0.5) #see lesson 01
 78 |       glClearDepth(1) #see lesson 01
 79 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) #see lesson 01
 80 |       glEnable(GL_DEPTH_TEST) # see nehe06
 81 |       glDepthFunc(GL_LEQUAL) # see nehe06
 82 | 
 83 |       glMatrixMode(GL_PROJECTION) #see lesson01
 84 |       glLoadIdentity # see lesson01
 85 |       gluPerspective(45.0, width / height, 0.1, 100.0) #see lesson 01
 86 |       glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST) #see nehe07
 87 |       glMatrixMode(GL_MODELVIEW)  #see lesson 01
 88 |       glLoadIdentity #see lesson 01
 89 | 
 90 |       glColor4f(1.0,1.0,1.0,0.5) # full brightness, 50% opacity
 91 |       glBlendFunc(GL_SRC_ALPHA,GL_ONE) # blending function for translucency based on alpha source
 92 | 
 93 |       glEnable(GL_TEXTURE_2D) #see lesson01
 94 |       glShadeModel(GL_SMOOTH) # see nehe07
 95 |       glLightfv(GL_LIGHT1, GL_AMBIENT, @ambient_light) # see nehe07
 96 |       glLightfv(GL_LIGHT1, GL_DIFFUSE, @diffuse_light) # see nehe07
 97 |       glLightfv(GL_LIGHT1, GL_POSITION, @light_postion) # see nehe07
 98 |       glEnable(GL_LIGHT1) # see nehe07
 99 |       @light_on ? glEnable(GL_LIGHTING) : glDisable(GL_LIGHTING) # see nehe07
100 |       if @blending
101 |         glEnable(GL_BLEND) # enable blending
102 |         glDisable(GL_DEPTH_TEST) # disable depth
103 |       else
104 |         glDisable(GL_BLEND)
105 |       	glEnable(GL_DEPTH_TEST)
106 |       end
107 |       glTranslate(0, 0, @z_depth) #see lesson 01
108 | 
109 |       glBindTexture(GL_TEXTURE_2D, current_filter) #see lesson 01
110 |       glRotatef(@x_angle, 1, 0, 0) # see nehe04
111 |       glRotatef(@y_angle, 0, 1, 0) # see nehe04
112 | 
113 |       glBegin(GL_QUADS)
114 |         glNormal3f(0, 0, 1) # see nehe07
115 |         glTexCoord2f(0, 0); glVertex3f(-1, -1,  1) # see lesson 01
116 |         glTexCoord2f(1, 0); glVertex3f( 1, -1,  1)
117 |         glTexCoord2f(1, 1); glVertex3f( 1,  1,  1)
118 |         glTexCoord2f(0, 1); glVertex3f(-1,  1,  1)
119 | 
120 |         glNormal3f(0, 0, -1)
121 |         glTexCoord2f(1, 0); glVertex3f(-1, -1, -1)
122 |         glTexCoord2f(1, 1); glVertex3f(-1,  1, -1)
123 |         glTexCoord2f(0, 1); glVertex3f( 1,  1, -1)
124 |         glTexCoord2f(0, 0); glVertex3f( 1, -1, -1)
125 | 
126 |         glNormal3f(0, 1, 0)
127 |         glTexCoord2f(0, 1); glVertex3f(-1,  1, -1)
128 |         glTexCoord2f(0, 0); glVertex3f(-1,  1,  1)
129 |         glTexCoord2f(1, 0); glVertex3f( 1,  1,  1)
130 |         glTexCoord2f(1, 1); glVertex3f( 1,  1, -1)
131 | 
132 |         glNormal3f(0, -1, 0)
133 |         glTexCoord2f(1, 1); glVertex3f(-1, -1, -1)
134 |         glTexCoord2f(0, 1); glVertex3f( 1, -1, -1)
135 |         glTexCoord2f(0, 0); glVertex3f( 1, -1,  1)
136 |         glTexCoord2f(1, 0); glVertex3f(-1, -1,  1)
137 | 
138 |         glNormal3f(1, 0, 0)
139 |         glTexCoord2f(1, 0); glVertex3f( 1, -1, -1)
140 |         glTexCoord2f(1, 1); glVertex3f( 1,  1, -1)
141 |         glTexCoord2f(0, 1); glVertex3f( 1,  1,  1)
142 |         glTexCoord2f(0, 0); glVertex3f( 1, -1,  1)
143 | 
144 |         glNormal3f(-1, 0, 0)
145 |         glTexCoord2f(0, 0); glVertex3f(-1, -1, -1)
146 |         glTexCoord2f(1, 0); glVertex3f(-1, -1,  1)
147 |         glTexCoord2f(1, 1); glVertex3f(-1,  1,  1)
148 |         glTexCoord2f(0, 1); glVertex3f(-1,  1, -1)
149 |       glEnd
150 |     end
151 |   end
152 | 
153 |   def button_down(id)
154 |     case id
155 |     when Gosu::Button::KbEscape then close
156 |     when Gosu::Button::KbL then @light_on = !@light_on
157 |     when Gosu::Button::KbF then change_filter!
158 |     when Gosu::Button::KbB then @blending = !@blending
159 |     end
160 |   end
161 | end
162 | 
163 | window = Window.new
164 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson09.rb:
--------------------------------------------------------------------------------
  1 | require File.expand_path('../../config/boot', __FILE__)
  2 | 
  3 | class Texture
  4 |   attr_accessor :index
  5 |   def initialize(window)
  6 |     @image = Gosu::Image.new(window, "resources/nehe/lesson09/Star.bmp", true)
  7 |     @index = @image.gl_tex_info.tex_name
  8 |   end
  9 | end
 10 | 
 11 | class Star
 12 |   attr_accessor :colors, :distance, :angle
 13 | 
 14 |   def color_randomly
 15 |     self.colors = [rand(256), rand(256), rand(256)]
 16 |   end
 17 | end
 18 | 
 19 | class Window < Gosu::Window
 20 |   STAR_NUMBER = 50
 21 | 
 22 |   def initialize
 23 |     super(800, 600, false)
 24 |     self.caption = "Lesson #9 - Moving bitmaps in 3D space"
 25 |     @texture = Texture.new(self)
 26 |     initialize_defaults
 27 |     initialize_stars
 28 |   end
 29 | 
 30 |   def initialize_defaults
 31 |     @twinkle_on = false
 32 |     @tilt       = 90
 33 |     @zoom       = -15
 34 |     @spin       = 0
 35 |   end
 36 | 
 37 |   def initialize_stars
 38 |     @stars = []
 39 |     STAR_NUMBER.times do |i|
 40 |       @stars << Star.new.tap do |star|
 41 |         star.angle = 0
 42 |         star.distance = 7 * i.to_f / STAR_NUMBER
 43 |         star.color_randomly
 44 |       end
 45 |     end
 46 |   end
 47 | 
 48 |   def update
 49 |     @zoom -= 0.2 if button_down? Gosu::Button::KbPageUp
 50 |     @zoom += 0.2 if button_down? Gosu::Button::KbPageDown
 51 |     @tilt -= 0.5 if button_down? Gosu::Button::KbUp
 52 |     @tilt += 0.5 if button_down? Gosu::Button::KbDown
 53 |     @spin += 0.01
 54 |   end
 55 | 
 56 |   def draw_star(star)
 57 |     red, green, blue = * star.colors
 58 |     glColor4ub(red, green, blue, 255)
 59 |     glBegin(GL_QUADS)
 60 |       glTexCoord2f(0, 0); glVertex3f(-1,-1, 0)
 61 |       glTexCoord2f(1, 0); glVertex3f( 1,-1, 0)
 62 |       glTexCoord2f(1, 1); glVertex3f( 1, 1, 0)
 63 |       glTexCoord2f(0, 1); glVertex3f(-1, 1, 0)
 64 |     glEnd
 65 |   end
 66 | 
 67 |   # see lesson 01 and nehe02
 68 |   def init_scene
 69 |     glEnable(GL_TEXTURE_2D)
 70 |     glShadeModel(GL_SMOOTH)
 71 |     glClearColor(0,0,0,0.5)
 72 |     glClearDepth(1)
 73 |     glBlendFunc(GL_SRC_ALPHA,GL_ONE) #see nehe08
 74 |     glEnable(GL_BLEND)
 75 |   end
 76 | 
 77 |   # see lesson 01
 78 |   def add_perspective_to_scene
 79 |     glMatrixMode(GL_PROJECTION)
 80 |     glLoadIdentity
 81 |     gluPerspective(45.0, width / height, 0.1, 100.0)
 82 |     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST) #see nehe07
 83 |   end
 84 | 
 85 |   def draw
 86 |     gl do
 87 |       init_scene
 88 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
 89 |     	glBindTexture(GL_TEXTURE_2D, @texture.index)
 90 | 
 91 |     	@stars.each_with_index do |star, i|
 92 |         add_perspective_to_scene
 93 | 
 94 |         glMatrixMode(GL_MODELVIEW)  #see lesson 01
 95 |         glLoadIdentity              #see lesson 01
 96 | 
 97 |         glTranslatef(0, 0, @zoom)   #see lesson 01
 98 | 
 99 |         glRotatef(@tilt, 1, 0, 0)   # rotate it by x direction
100 |         glRotatef(star.angle, 0, 1, 0) # rotate it by y direction
101 |         glTranslatef(star.distance, 0, 0) # move on the x direction
102 | 
103 |         # since we are using a flat texture we want it always look flat and correct regardless how much spinning and rotation are we doing. We
104 |         # can archive that by canceling the rotations that we are doing before we draw our stars. IMPORTANT: Cancellation by happen in the reverse order
105 |         glRotatef(-star.angle, 0, 1, 0)
106 |         glRotatef(-@tilt, 1, 0, 0)
107 | 
108 |         draw_star(@stars[rand(@stars.size)]) if @twinkle_on # we make star swinkle by drawing another random non spinning star on the bottom of it
109 | 
110 |         glRotatef(@spin,0,0,1) #spin the star on z axis
111 |         draw_star(star)
112 | 
113 |         star.angle += i.to_f / @stars.size # increase the angle for next frame
114 |         star.distance -= 0.01 # move stars to closer and closer to the center
115 | 
116 |         if (star.distance < 0) # if it reaches center, restart its distance and reset the color
117 |           star.distance += 5
118 |           star.color_randomly
119 |         end
120 |       end
121 |     end
122 |   end
123 | 
124 |   def button_down(id)
125 |     case id
126 |     when Gosu::Button::KbEscape then close
127 |     when Gosu::Button::KbT then @twinkle_on = !@twinkle_on
128 |     end
129 |   end
130 | end
131 | 
132 | window = Window.new
133 | window.show


--------------------------------------------------------------------------------
/using_nehe_lessons/lesson10.rb:
--------------------------------------------------------------------------------
  1 | require 'gosu'
  2 | require 'json'
  3 | require 'gl'
  4 | require 'glu'
  5 | require 'glut'
  6 | include Gl
  7 | include Glu
  8 | 
  9 | class Texture
 10 |   attr_accessor :info
 11 |   def initialize(window)
 12 |     @image = Gosu::Image.new(window, "resources/nehe/lesson10/Mud.bmp", true)
 13 |     @info = @image.gl_tex_info
 14 |   end
 15 | end
 16 | 
 17 | class Vertex
 18 |   attr_reader :x, :y, :z, :u, :v
 19 | 
 20 |   def initialize(coords)
 21 |     coords.each do |coordinate, value|
 22 |       instance_variable_set(:"@#{coordinate}", value)
 23 |     end
 24 |   end
 25 | end
 26 | 
 27 | class Triangle
 28 |   attr_accessor :vertexes
 29 |   def initialize
 30 |     @vertexes = []
 31 |   end
 32 | end
 33 | 
 34 | class Window < Gosu::Window
 35 |   attr_accessor :triangles, :current_filter
 36 | 
 37 |   def initialize
 38 |     super(800, 600, false)
 39 |     self.caption = "Lesson #10 - Loading and moving through 3D World"
 40 |     @texture = Texture.new(self)
 41 |     setup_world
 42 |     init_defaults
 43 |     init_lights
 44 |     init_textures
 45 |   end
 46 | 
 47 |   def setup_world
 48 |     triangle_data = JSON.parse(File.read('resources/nehe/lesson10/world.json'))
 49 |     @triangles = triangle_data.inject([]) do |acc, vertexes|
 50 |       acc << Triangle.new.tap do |triangle|
 51 |         vertexes.each do |vertex|
 52 |           triangle.vertexes << Vertex.new(vertex)
 53 |         end
 54 |       end
 55 |       acc
 56 |     end
 57 |   end
 58 | 
 59 |   def init_defaults
 60 |     @light_on = false
 61 |     @blending = false
 62 |     @bouncing = @bouncing_angle = 0
 63 |     @x_pos = @look_up_or_down_pos = @y_angle = @look_up_or_down = 0
 64 |     @degree_radian_conversion = 0.0174532925 # pi / 180
 65 |   end
 66 | 
 67 |   def init_lights
 68 |      # see nehe07 for details on how lighting work
 69 |     @ambient_light = [0.5, 0.5, 0.5, 1]
 70 |     @diffuse_light = [1, 1, 1, 1]
 71 |     @light_postion = [0, 0, 2, 1]
 72 |   end
 73 |   def init_textures
 74 |      # see nehe07 for details on how filters work
 75 |     glGetError
 76 |     @nearest = Texture.new(self)
 77 |     glBindTexture(GL_TEXTURE_2D, @nearest.info.tex_name)
 78 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST)
 79 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST)
 80 | 
 81 |     @linear = Texture.new(self)
 82 |     glBindTexture(GL_TEXTURE_2D, @linear.info.tex_name)
 83 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)
 84 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR)
 85 | 
 86 |     @minimap = Texture.new(self)
 87 |     glBindTexture(GL_TEXTURE_2D, @minimap.info.tex_name)
 88 |     texture = glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_FLOAT)
 89 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR)
 90 | 
 91 |     glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR_MIPMAP_NEAREST)
 92 |     gluBuild2DMipmaps(GL_TEXTURE_2D, 3, 256, 256, GL_RGB, GL_FLOAT, texture)
 93 |     @filters = [@nearest.info.tex_name, @linear.info.tex_name, @minimap.info.tex_name]
 94 |   end
 95 | 
 96 |   def init_scene
 97 |     #basics of creating a scene. see lesson 1 and others
 98 |     glEnable(GL_TEXTURE_2D)
 99 |     glBlendFunc(GL_SRC_ALPHA,GL_ONE)
100 |     glShadeModel(GL_SMOOTH)
101 |     glClearColor(0,0,0,0)
102 |     glClearDepth(1)
103 |     glEnable(GL_DEPTH_TEST)
104 |     glDepthFunc(GL_LEQUAL)
105 |     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST)
106 |   end
107 | 
108 | 
109 |   def add_perspective_to_scene
110 |     # see lesson 01
111 |     glMatrixMode(GL_PROJECTION)
112 |     glLoadIdentity
113 |     gluPerspective(45.0, width / height, 0.1, 100.0)
114 |     glMatrixMode(GL_MODELVIEW)
115 |     glLoadIdentity
116 |   end
117 | 
118 |   def update
119 |     @y_angle -= 1.5 if button_down? Gosu::Button::KbRight
120 |     @y_angle += 1.5 if button_down? Gosu::Button::KbLeft
121 | 
122 |     if button_down?(Gosu::Button::KbUp)
123 |       @x_pos -= Math.sin(@y_angle * @degree_radian_conversion) * 0.05
124 |       @look_up_or_down_pos -= Math.cos(@y_angle * @degree_radian_conversion) * 0.05
125 |       @bouncing_angle > 359 ? @bouncing_angle = 0 : @bouncing_angle += 10 # bouncing and bouncing angle gives illusion of walking
126 |       @bouncing = Math.sin(@bouncing_angle * @degree_radian_conversion) / 20 # use sinusoid for bouncing
127 |     end
128 |     if button_down?(Gosu::Button::KbDown)
129 |       @x_pos += Math.sin(@y_angle * @degree_radian_conversion) * 0.05
130 |       @look_up_or_down_pos += Math.cos(@y_angle * @degree_radian_conversion) * 0.05
131 |       @bouncing_angle <= 1 ? @bouncing_angle = 359 : @bouncing_angle -= 10 # bouncing and bouncing angle gives illusion of walking
132 |       @bouncing = Math.sin(@bouncing_angle * @degree_radian_conversion) / 20 # use sinusoid for bouncing
133 |     end
134 |     @look_up_or_down -= 0.2 if button_down? Gosu::Button::KbPageUp
135 |     @look_up_or_down += 0.2 if button_down? Gosu::Button::KbPageDown
136 |   end
137 | 
138 |   def draw
139 |     gl do
140 |       init_scene
141 |       add_perspective_to_scene
142 |       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT) # see lesson01
143 | 
144 |       glLightfv(GL_LIGHT1, GL_AMBIENT, @ambient_light) # see lighting lesson nehe07
145 |       glLightfv(GL_LIGHT1, GL_DIFFUSE, @diffuse_light)
146 |       glLightfv(GL_LIGHT1, GL_POSITION, @light_postion)
147 |       glEnable(GL_LIGHT1)
148 | 
149 |       @light_on ? glEnable(GL_LIGHTING) : glDisable(GL_LIGHTING) # see nehe07
150 |       if @blending # for blending see nehe08
151 |         glEnable(GL_BLEND)
152 |         glDisable(GL_DEPTH_TEST)
153 |       else
154 |         glDisable(GL_BLEND)
155 |         glEnable(GL_DEPTH_TEST)
156 |       end
157 | 
158 |       # For user to be able to walk around normally we would move the camera around and draw the 3D environment relative to the camera position.
159 |       # This is slow and hard to code. What we will do is this:
160 |       # 1. Rotate and translate the camera position according to user commands
161 |       # 2. Rotate the world around the origin in the opposite direction of the camera rotation (giving the illusion that the camera has been rotated)
162 |       # 3. Translate the world in the opposite manner that the camera has been translated (again, giving the illusion that the camera has moved)
163 |       x = -@x_pos
164 |       y = -@bouncing - 0.25
165 |       z = -@look_up_or_down_pos
166 |       scene_angle = 360 - @y_angle
167 | 
168 |       glRotatef(@look_up_or_down,1,0,0) #rotate to be able to look up or down
169 |       glRotatef(scene_angle,0,1,0); #rotate based on direction user is facing
170 |       glTranslate(x, y, z) #translate the world in opposite of camera
171 |       glBindTexture(GL_TEXTURE_2D, current_filter) #see lesson 01
172 |       triangles.each do |triangle|
173 |         draw_triangle(triangle)
174 |       end
175 |     end
176 |   end
177 | 
178 |   def draw_triangle(triangle)
179 |     glBegin(GL_TRIANGLES)
180 |       glNormal3f(0, 0, 1)
181 |       triangle.vertexes.each do |vertex|
182 |         glTexCoord2f(vertex.u, vertex.v)
183 |         glVertex3f(vertex.x, vertex.y, vertex.z)
184 |       end
185 |     glEnd
186 |   end
187 | 
188 |   def change_filter!
189 |     index = @filters.index(current_filter)
190 |     index > 1 ? index = 0 : index += 1
191 |     @current_filter = @filters[index]
192 |   end
193 | 
194 |   def current_filter
195 |     @current_filter ||= @filters.first
196 |   end
197 | 
198 |   def button_down(id)
199 |     case id
200 |     when Gosu::Button::KbEscape then close
201 |     when Gosu::Button::KbL then @light_on = !@light_on
202 |     when Gosu::Button::KbF then change_filter!
203 |     when Gosu::Button::KbB then @blending = !@blending
204 |     end
205 |   end
206 | end
207 | 
208 | window = Window.new
209 | window.show


--------------------------------------------------------------------------------