└── motion_parallax.py


/motion_parallax.py:
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  1 | ###
  2 | ### Author: Xin Li
  3 | ### Description:  In this programming assignment,
  4 | ### In this programming assignment, you will be
  5 | ### building a program that displays a landscape
  6 | ### in a graphics canvas and allows the user to
  7 | ### control the perspective of the landscape by
  8 | ### moving the mouse. The perspective seems to
  9 | ### change due to an effect called motion parallax
 10 | ### , which you should implement in this program.
 11 | ### The above gif shows an example of the user
 12 | ### interacting with a completed version of the
 13 | ### program.
 14 | ### Name of this program is: motion_parallax.py
 15 | from graphics import graphics
 16 | import random
 17 | def main():
 18 |     gui = graphics(600, 600, 'motion_parallax')
 19 |     color_string1, color_string2, color_string3 = random_mountian_color(gui)
 20 |     x_coord = -600
 21 |     x_coord_2 = 0
 22 |     x_coord_3 = 0
 23 |     while True:
 24 |         y_coord = 100
 25 |         y_coord_2 = 50
 26 |         y_coord_3 = 0
 27 |         gui.clear()
 28 |         x = gui.mouse_x // 5 + 200
 29 |         y = gui.mouse_y // 5 + 200
 30 |         blue_canvas(gui, x, y)
 31 |         mountains(gui, x, y, color_string1, color_string2, color_string3)
 32 |         lake_lawn_and_tree_house(gui, x, y)
 33 |         the_birds(gui, x_coord, y_coord)
 34 |         x_coord=change_of_x_coord(x_coord)
 35 |         the_clouds(gui, x_coord_2, y_coord_2)
 36 |         x_coord_2=change_of_x_coord_2(x_coord_2)
 37 | 
 38 |         gui.update_frame(60)
 39 | 
 40 | def blue_canvas(gui, x, y):
 41 |     '''Initially, get a program that generates
 42 |     a square canvas, and fill the canvas with
 43 |     a blue rectangle. The blue rectangle can serve
 44 |     as the sky.
 45 |     '''
 46 |     gui.rectangle(-10, -10, 620, 620, 'sky blue')
 47 |     gui.ellipse(x+150, y-150, 100, 100, 'gold')
 48 | 
 49 | def mountains(gui, x, y, color_string1, color_string2, color_string3):
 50 |     '''Next, work on getting a static landscape
 51 |     displayed. At this point, don鈥檛 worry about
 52 |     the motion parallax, random mountain colors,
 53 |     or the birds. The shapes will be added the canvas
 54 |     in the order you add them programatically.
 55 |     '''
 56 |     gui.triangle(x+50, y-100, x-150, y+250, x+250, y+250, color_string1)
 57 |     gui.triangle(x-150, y-50, x-450, y+250, x+150, y+250, color_string2)
 58 |     gui.triangle(x+200, y-50, x-50, y+250, x+550, y+250, color_string3)
 59 | 
 60 | def lake_lawn_and_tree_house(gui, x, y):
 61 |     gui.rectangle(x-450, y+250, 1000, 300, 'springgreen')
 62 |     i = 0
 63 |     while i <= 620:
 64 |         gui.line(i, y+230, i, y+250, 'springgreen')
 65 |         i += 5
 66 |     gui.rectangle(x+150, y+230, 20, 50, 'brown')
 67 |     gui.ellipse(x+160, y+200, 50, 100, 'green')
 68 |     gui.ellipse(x, y+300, 400, 50, 'blue')
 69 |     gui.rectangle(x+220, y+250, 100, 100, 'gold4')
 70 |     gui.triangle(x+270, y+200, x+220, y+250, x+320, y+250, 'orange')
 71 |     gui.rectangle(x+230, y+275, 40, 40, 'sky blue')
 72 |     gui.rectangle(x+280, y+275, 30, 60, 'brown')
 73 | 
 74 | def random_mountian_color(gui):
 75 |     '''Update the program so that it generates three random colors
 76 |     for the mountains on each program run.
 77 |     '''
 78 |     color_string1 = "blue"
 79 |     color_string2 = "red"
 80 |     color_string3 = "green"
 81 |     red =  random.randint(0,255)
 82 |     green =  random.randint(0,255)
 83 |     blue =  random.randint(0,255)
 84 |     color_string1 = gui.get_color_string(blue, red, green)
 85 |     color_string2 = gui.get_color_string(red, green, blue)
 86 |     color_string3 = gui.get_color_string(green, blue, red)
 87 |     return color_string1, color_string2, color_string3
 88 | 
 89 | 
 90 | def the_birds (gui, x_coord, y_coord):
 91 |     '''add the flying birds to the canvas. You should
 92 |     use a while loop. You are not required to make the
 93 |     birds move, or to be a part of the parallax.
 94 |     '''
 95 |     i = 0
 96 |     while i < 5:
 97 |         gui.line(x_coord+100*i, y_coord+20*i, x_coord+25+100*i, y_coord+10+20*i, 'black', 5)
 98 |         gui.line(x_coord+25+100*i, y_coord+10+20*i, x_coord+50+100*i, y_coord+20*i, 'black', 5)
 99 |         i += 1
100 | def change_of_x_coord(x_coord):
101 |     x_coord += 10
102 |     if x_coord > 620:
103 |         x_coord = -600
104 |     return x_coord
105 | 
106 | def the_clouds (gui, x_coord_2, y_coord_2):
107 |     gui.ellipse(x_coord_2, y_coord_2, 150, 50, 'white')
108 | def change_of_x_coord_2(x_coord_2):
109 |     x_coord_2 += 5
110 |     if x_coord_2 > 700:
111 |         x_coord_2 = -200
112 |     return x_coord_2
113 | main()
114 | 


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