├── .gitignore ├── LICENSE ├── README.md ├── arcpy ├── Mesh.lyr └── MeshToolbox.pyt ├── media ├── AddPackages.png ├── App.png ├── App400.png ├── Kernel.png ├── MeshToolbox.png ├── MeshToolbox400.png └── TypeScript.png ├── mesh ├── css │ └── main.css ├── favicon.ico ├── img │ └── gear.png ├── index.html └── js │ ├── heat.js │ ├── kernel.js │ ├── kernel.ts │ └── main.js ├── package.json └── tsconfig.json /.gitignore: -------------------------------------------------------------------------------- 1 | .idea/ 2 | node_modules/ 3 | arcpy/*.xml 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright 2017 Mansour Raad 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Space Time Ripple 2 | 3 | Start by viewing [this application](https://dl.dropboxusercontent.com/u/2193160/mesh/index.html). 4 | 5 | ![](media/App.png) 6 | 7 | Make sure to tilt the map by holding down the right mouse button and sliding the mouse up. Then, slide the bottom slider back and forth to see the data "ripple" through time. This is displaying the density of 1 million [NYC taxi](http://www.nyc.gov/html/tlc/html/about/trip_record_data.shtml) pickups aggregated over 30 minute intervals. This application is based on the new [4.2 ArcGIS API for JavaScript](https://developers.arcgis.com/javascript/) and specifically on the [externalRenderers](https://developers.arcgis.com/javascript/latest/api-reference/esri-views-3d-externalRenderers.html) capabilities, where a JS application can delegate the rendering to custom [WebGL](https://www.khronos.org/webgl/) code. 8 | 9 | This project is divided into 2 sub-projects: 10 | 11 | - An [ArcPy](http://pro.arcgis.com/en/pro-app/arcpy/get-started/what-is-arcpy-.htm) based [Pro](https://pro.arcgis.com/en/pro-app/) toolbox to aggregate and prepare the data. 12 | - A JavaScript application to view the prepared data. 13 | 14 | ## Mesh Toolbox 15 | 16 | ![](media/MeshToolbox.png) 17 | 18 | Make sure to `pip install sortedcontainers`. 19 | 20 | This tool bins over space and time the input point features to produce on the local file system a "space-time-cube" in the form of a [DOJO AMD Module](http://dojotoolkit.org/documentation/tutorials/1.10/modules/). The following is a very simplistic output, but demonstrates the module content. 21 | 22 | ``` 23 | define({ 24 | "mesh": { 25 | "ymax": 40.86254766648426, 26 | "xmin": -74.0984483274695, 27 | "ymin": 40.632320706393344, 28 | "cols": 2, 29 | "rows": 2, 30 | "vertices": [-74.0984483274695, 40.86254766648426, 100, -73.69913039514432, 40.86254766648426, 100, -74.0984483274695, 40.632320706393344, 100, -73.69913039514432, 40.632320706393344, 100], 31 | "xmax": -73.69913039514432, 32 | "indices": [1, 0, 2, 2, 3, 1], 33 | "length": 4 34 | }, 35 | "data": { 36 | "min": 980557.0, 37 | "stddev": 0.0, 38 | "max": 980557.0, 39 | "mean": 980557.0, 40 | "data": [{"datetime": "2012-12-21 00:00:00", "points": [{"w": 0.2, "r": 1, "p": 980557, "c": 0}]}] 41 | } 42 | }); 43 | ``` 44 | 45 | The `mesh` property has the world extent (`xmin`,`ymin`,`xmax`,`ymax`) of the mesh based on the map current extent, and defines the vertices of the nodes forming the mesh as a sequence of triples (lon,lat,elevation). WebGL renders the mesh as a sequence of triangles using the [WebGLRenderingContext.drawElements()](https://developer.mozilla.org/en-US/docs/Web/API/WebGLRenderingContext/drawElements) where the `mode` is set to `gl.TRIANGLES`. The `drawElements` uses the `indicies` and the "converted" (more on this later) `vertices` to draw efficiently and quickly the triangles. 46 | 47 | The `data` property defines the space-time-cube. During the module preparation, the input features are binned by space using their geometry into rows and column tuples and by time using their temporal attribute into interval buckets. In addition, the `mean` and `stddev` of the bin counts are calculate using an [online variance](https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance). The values `min` and `max` values are derived using `mean` ± `stddev` and used to weight the bin count (`p`) and produce a weight `w` ∈ \[0,1\] in the subsequently defined `points` elements. 48 | The `data` sub-property is an array of objects sorted by `datetime` interval buckets and contain a `points` sub-property. The latter is an array of objects with population bin count values (`p`) for a mesh row (`r`) and column (`c`) vertex. 49 | 50 | So for each time interval bucket, the mesh vertices are "elevated" and color coded in proportion to their `w` point value. 51 | 52 | The Interval parameter in the tool accepts a string in the form of a number followed by either a `s` (seconds), `m` (minutes), `d` (days), `w` (weeks). So a string value of `30s` means an interval of 30 seconds, and a string value of `2d` means an interval of 2 days. 53 | 54 | This tool depends on [SortedContainers](http://www.grantjenks.com/docs/sortedcontainers/), so make sure to use `Add Packages` to add the library to your Pro Python environment. 55 | 56 | ![](media/AddPackages.png) 57 | 58 | ## JavaScript Application 59 | 60 | The generated space-time cube JavaScript code is loaded at startup time into the application as an AMD module and is rendered using the [4.2 ArcGIS API for JavaScript](https://developers.arcgis.com/javascript/) with the experimental [externalRenderers](https://developers.arcgis.com/javascript/latest/api-reference/esri-views-3d-externalRenderers.html) which enables the application to invoke [WebGL](https://www.khronos.org/webgl/) [shaders](https://webglfundamentals.org/webgl/lessons/webgl-shaders-and-glsl.html). The shaders are compiled and initialized in the `setup` function of an `externalRenderer` instance and continuously invoked in the `render` function. 61 | 62 | The following is a snippet in the `render` function: 63 | 64 | ``` 65 | var camera = context.camera; 66 | gl.uniformMatrix4fv(this.pMatrixUniform, false, camera.projectionMatrix); 67 | gl.uniformMatrix4fv(this.vMatrixUniform, false, camera.viewMatrix); 68 | 69 | externalRenderers.toRenderCoordinates( 70 | this.view, 71 | this.vertices, 72 | 0, 73 | SpatialReference.WGS84, 74 | this.arrPosition, 75 | 0, 76 | appMesh.length); 77 | ``` 78 | 79 | Note how we are taking advantage to the `camera` projection matrix and view matrix properties to populate the vertex shader `uPMatrix` and `uVMatrix` uniforms used in the `gl_Position` calculation. In addition, and this is SOOOO USEFUL, note the usage of the `toRenderCoordinates(...)` function that converts the mesh vertices world coordinates to WebGL coordinates based on the camera position. 80 | 81 | The application enables the user to drag back and forth a slider where the slider position is an index into the space-time cube `data.data` array, where all the `points` associated with that "datetime" will be mapped to the mesh vertices and elevated. 82 | The vertex elevation is proportional to the `w` value of a point. In addition, all the neighboring vertices are also elevated, but in proportion to a kernel distance function providing a smooth elevated surface. 83 | 84 | ![](media/Kernel.png) 85 | 86 | To view the application, place the `mesh` folder in your web server or you can start a simple web server in the `mesh` folder: 87 | 88 | ``` 89 | python -m SimpleHTTPServer 8000 90 | ``` 91 | 92 | Open a browser (preferably Chrome) and navigate to 93 | 94 | ### TypeScript 95 | 96 | Note that the kernel elevation is occurring in the `kernel.ts` code writen in [TypeScript](https://www.typescriptlang.org/). I have to confess that is a bit selfish on my part for "mixing" languages, as JavaScript is not my favorite language, and I long for the days when I used to write statically typed [AS3](https://en.wikipedia.org/wiki/ActionScript) code. Typescript is pretty cool, has great community support and we at Esri have made significant investments in supporting it. Check out [this](https://github.com/Esri/jsapi-resources/tree/master/4.x/typescript) github repo to setup your development environment. 97 | In addition, it is **HIGHLY** recommended to use an IDE like [IntelliJ](https://www.jetbrains.com/idea/) or [WebStorm](https://www.jetbrains.com/help/webstorm/2016.3/typescript-support.html) with TypeScript support If you need to modify the `js/kernel.ts` file. 98 | 99 | ![](media/TypeScript.png) 100 | 101 | ### References 102 | 103 | - 104 | - 105 | 106 | ### Notes to self 107 | 108 | - Initialize the project using `npm init` 109 | - Install TS typings using `npm install --save @types/arcgis-js-api` 110 | -------------------------------------------------------------------------------- /arcpy/Mesh.lyr: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mraad/space-time-ripple/e78787e60fed889cbe00cbed59acbee4ef0d6577/arcpy/Mesh.lyr -------------------------------------------------------------------------------- /arcpy/MeshToolbox.pyt: -------------------------------------------------------------------------------- 1 | # 2 | # http://www.grantjenks.com/docs/sortedcontainers/introduction.html 3 | # pip install sortedcontainers 4 | # 5 | 6 | import arcpy 7 | import json 8 | import os 9 | import time 10 | from datetime import timedelta 11 | from math import * 12 | from sortedcontainers import SortedDict 13 | 14 | 15 | class Toolbox(object): 16 | def __init__(self): 17 | self.label = "MeshToolbox" 18 | self.alias = "MeshToolbox" 19 | self.tools = [MeshTool] 20 | 21 | 22 | class MeshTool(object): 23 | def __init__(self): 24 | self.label = "Mesh Tool" 25 | self.description = "Mesh Tool" 26 | self.canRunInBackground = False 27 | self.input_fc = None 28 | 29 | def getParameterInfo(self): 30 | output_fl = arcpy.Parameter( 31 | name='mesh', 32 | displayName='mesh', 33 | direction='Output', 34 | datatype='Feature Layer', 35 | parameterType='Derived') 36 | output_fl.symbology = os.path.join(os.path.dirname(__file__), "Mesh.lyr") 37 | 38 | input_fc = arcpy.Parameter( 39 | name="input_fc", 40 | displayName="Input Feature Class", 41 | direction="Input", 42 | datatype="Table View", 43 | parameterType="Required") 44 | 45 | num_cells = arcpy.Parameter( 46 | name="num_cells", 47 | displayName="Num Cells", 48 | direction="Input", 49 | datatype="Long", 50 | parameterType="Required") 51 | num_cells.value = 10 52 | 53 | min_count = arcpy.Parameter( 54 | name="min_count", 55 | displayName="Min Count Per Cell", 56 | direction="Input", 57 | datatype="Long", 58 | parameterType="Required") 59 | min_count.value = 1 60 | 61 | interval = arcpy.Parameter( 62 | name="interval", 63 | displayName="Time Interval", 64 | direction="Input", 65 | datatype="String", 66 | parameterType="Required") 67 | interval.value = "30m" 68 | 69 | path = arcpy.Parameter( 70 | name="path", 71 | displayName="JS Output File", 72 | direction="Input", 73 | datatype="String", 74 | parameterType="Required") 75 | path.value = os.path.join(os.path.dirname(__file__), "heat.js") 76 | 77 | date_field = arcpy.Parameter( 78 | name="date_field", 79 | displayName="Date Field", 80 | direction="Input", 81 | datatype="String", 82 | parameterType="Required") 83 | date_field.filter.type = "ValueList" 84 | date_field.filter.list = [] 85 | 86 | case_field = arcpy.Parameter( 87 | name="case_field", 88 | displayName="Case Field", 89 | direction="Input", 90 | datatype="String", 91 | parameterType="Required") 92 | case_field.filter.type = "ValueList" 93 | case_field.filter.list = [] 94 | 95 | bbox = arcpy.Parameter( 96 | name="bbox", 97 | displayName="Bounding Box", 98 | direction="Input", 99 | datatype="GPExtent", 100 | parameterType="Required") 101 | 102 | return [output_fl, input_fc, num_cells, date_field, case_field, min_count, interval, path, bbox] 103 | 104 | def isLicensed(self): 105 | return True 106 | 107 | def updateParameters(self, parameters): 108 | input_fc = parameters[1].value 109 | if self.input_fc != input_fc: 110 | self.input_fc = input_fc 111 | date_field = parameters[3] 112 | case_field = parameters[4] 113 | date_list = [] 114 | case_list = [] 115 | description = arcpy.Describe(input_fc) 116 | for field in description.fields: 117 | if field.type == "Date": 118 | date_list.append(field.name) 119 | if field.type in ["Double", "Integer", "Single", "SmallInteger"]: 120 | case_list.append(field.name) 121 | date_list = sorted(date_list) 122 | date_field.filter.list = date_list 123 | date_field.value = date_list[0] if len(date_list) > 0 else "" 124 | case_list = sorted(case_list) 125 | case_field.filter.list = case_list 126 | case_field.value = case_list[0] if len(case_list) > 0 else "" 127 | 128 | def updateMessages(self, parameters): 129 | return 130 | 131 | def create_mesh(self, extent_84, cells): 132 | arcpy.SetProgressorLabel("Creating mesh...") 133 | 134 | xmin = extent_84.XMin 135 | ymin = extent_84.YMin 136 | xmax = extent_84.XMax 137 | ymax = extent_84.YMax 138 | 139 | cols = cells 140 | rows = cells 141 | 142 | # Generate indices to triangle vertices 143 | indicies = [] 144 | for r0 in range(0, rows - 1): 145 | for c0 in range(0, cols - 1): 146 | r1 = r0 + 1 147 | c1 = c0 + 1 148 | tl = r0 * cols + c0 149 | tr = r0 * cols + c1 150 | bl = r1 * cols + c0 151 | br = r1 * cols + c1 152 | indicies.extend([tr, tl, bl, bl, br, tr]) 153 | 154 | x_del = (xmax - xmin) / (cols - 1) 155 | y_del = (ymax - ymin) / (rows - 1) 156 | 157 | # Generate vertices locations 158 | vertices = [] 159 | y = ymax 160 | for _ in range(0, rows): 161 | ofs = xmin 162 | for _ in range(0, cols): 163 | vertices.extend([ofs, y, 100]) 164 | ofs += x_del 165 | y -= y_del 166 | 167 | obj = { 168 | 'rows': rows, 169 | 'cols': cols, 170 | 'xmin': xmin, 171 | 'ymin': ymin, 172 | 'xmax': xmax, 173 | 'ymax': ymax, 174 | 'length': cols * rows, 175 | 'vertices': vertices, 176 | 'indices': indicies 177 | } 178 | return obj 179 | 180 | def create_data(self, extent_84, sr_84, input_fc, cells, min_count, interval, date_field, case_field): 181 | int_text = interval[-1] 182 | int_nume = int(interval[:-1]) 183 | if int_text == "s": 184 | seconds = timedelta(seconds=int_nume).total_seconds() 185 | elif int_text == "m": 186 | seconds = timedelta(minutes=int_nume).total_seconds() 187 | elif int_text == "h": 188 | seconds = timedelta(hours=int_nume).total_seconds() 189 | elif int_text == "d": 190 | seconds = timedelta(days=int_nume).total_seconds() 191 | elif int_text == "w": 192 | seconds = timedelta(weeks=int_nume).total_seconds() 193 | else: 194 | seconds = int(interval) 195 | 196 | time_dict = SortedDict() 197 | xmin = extent_84.XMin 198 | ymin = extent_84.YMin 199 | xmax = extent_84.XMax 200 | ymax = extent_84.YMax 201 | x_fac = cells / (xmax - xmin) 202 | y_fac = cells / (ymax - ymin) 203 | result = arcpy.management.GetCount(input_fc) 204 | max_range = int(result.getOutput(0)) 205 | step_max = int(max(1, max_range / 100)) 206 | step_cnt = 0 207 | arcpy.SetProgressor("step", "Searching...", 0, max_range, step_max) 208 | # Query space and time attributes from features 209 | fields = ["SHAPE@X", "SHAPE@Y", date_field, case_field] 210 | with arcpy.da.SearchCursor(input_fc, fields, spatial_reference=sr_84) as cursor: 211 | for elem in cursor: 212 | step_cnt += 1 213 | arcpy.SetProgressorPosition(step_cnt) 214 | shape_x = elem[0] 215 | shape_y = elem[1] 216 | # Make sure it is in the map extent 217 | if xmin < shape_x < xmax and ymin < shape_y < ymax: 218 | date_value = elem[2] 219 | case_value = elem[3] 220 | # Snap X/Y to ROW/COL bucket 221 | col = floor(x_fac * (shape_x - xmin)) 222 | row = cells - floor(y_fac * (shape_y - ymin)) 223 | tup = (row, col) 224 | # Snap TIME to a temporal bucket 225 | time_key = int(time.mktime(date_value.timetuple()) / seconds) 226 | if time_key in time_dict: 227 | time_val = time_dict[time_key] 228 | if tup in time_val: 229 | prev_val, prev_cnt = time_val[tup] 230 | time_val[tup] = (max(prev_val, case_value), prev_cnt + 1) 231 | else: 232 | time_val[tup] = (case_value, 1) 233 | else: 234 | time_dict[time_key] = {tup: (case_value, 1)} 235 | arcpy.SetProgressor("default") 236 | arcpy.SetProgressorLabel("Creating data...") 237 | p_n = 0 238 | p_mu = 0.0 239 | p_m2 = 0.0 240 | data = [] 241 | # Go back through the data and calc mean and stdev in one pass 242 | for tk, tv in time_dict.items(): 243 | points = [] 244 | for rc_tup, case_tup in tv.items(): 245 | case_value, case_count = case_tup 246 | if case_count >= min_count: 247 | row, col = rc_tup 248 | p = case_value # plot the max value 249 | points.append({"r": row, "c": col, "p": p, "w": 1.0}) 250 | p_n += 1 251 | delta = p - p_mu 252 | p_mu += delta / p_n 253 | delta2 = p - p_mu 254 | p_m2 += delta * delta2 255 | if points: 256 | date_text = time.strftime('%Y-%m-%d %H:%M:%S', time.gmtime(tk * seconds)) 257 | data.append({"datetime": date_text, "points": points}) 258 | s2 = p_m2 / (p_n - 1) if p_n > 1 else 0.0 259 | sd = sqrt(s2) 260 | p_min = p_mu - sd 261 | p_max = p_mu + sd 262 | p_del = p_max - p_min if p_max > p_min else 1.0 263 | arcpy.SetProgressorLabel("Normalizing data...") 264 | # Go back again and normalize between mean +/- 1 stddev where min weight is 0.2 265 | for elem in data: 266 | for point in elem["points"]: 267 | p = point["p"] 268 | if p < p_min: 269 | w = 0.2 270 | elif p > p_max: 271 | w = 1.0 272 | else: 273 | w = 0.2 + 0.8 * (p - p_min) / p_del 274 | point["w"] = w 275 | return {"data": data, "min": p_min, "max": p_max, "mean": p_mu, "stddev": sd} 276 | 277 | def execute(self, parameters, messages): 278 | input_fc = parameters[1].value 279 | num_cells = parameters[2].value 280 | date_field = parameters[3].value 281 | case_field = parameters[4].value 282 | min_count = parameters[5].value 283 | interval = parameters[6].value 284 | output_file = parameters[7].value 285 | bbox = parameters[8].value 286 | 287 | sr_84 = arcpy.SpatialReference(4326) 288 | extent_84 = bbox.projectAs(sr_84.exportToString()) 289 | 290 | # if hasattr(arcpy, "mapping"): 291 | # map_doc = arcpy.mapping.MapDocument('CURRENT') 292 | # df = arcpy.mapping.ListDataFrames(map_doc)[0] 293 | # extent_84 = df.extent.projectAs(sr_84) 294 | # else: 295 | # gis_project = arcpy.mp.ArcGISProject('CURRENT') 296 | # map_frame = gis_project.listMaps()[0] 297 | # extent_84 = map_frame.defaultCamera.getExtent().projectAs(sr_84) 298 | 299 | mesh = self.create_mesh(extent_84, num_cells + 1) 300 | 301 | data = self.create_data(extent_84, sr_84, input_fc, num_cells, min_count, interval, date_field, case_field) 302 | 303 | arcpy.SetProgressorLabel("Saving JS...") 304 | obj = {"mesh": mesh, "data": data} 305 | with open(output_file, "w") as text_file: 306 | text_file.write("define(") 307 | json.dump(obj, text_file) 308 | text_file.write(");") 309 | 310 | out_nm = "Mesh" 311 | # ws = "in_memory" 312 | ws = arcpy.env.scratchGDB 313 | fc = ws + "/" + out_nm 314 | 315 | if arcpy.Exists(fc): 316 | arcpy.management.Delete(fc) 317 | 318 | arcpy.SetProgressorLabel("Creating Mesh FeatureClass...") 319 | arcpy.management.CreateFeatureclass(ws, out_nm, 'POLYGON', 320 | spatial_reference=sr_84, 321 | has_m='DISABLED', 322 | has_z='DISABLED') 323 | with arcpy.da.InsertCursor(fc, ["SHAPE@"]) as cursor: 324 | v = mesh["vertices"] 325 | i = mesh["indices"] 326 | idx_len = len(i) 327 | idx = 0 328 | while idx < idx_len: 329 | ii = i[idx] * 3 330 | jj = i[idx + 1] * 3 331 | kk = i[idx + 2] * 3 332 | ix = v[ii] 333 | iy = v[ii + 1] 334 | jx = v[jj] 335 | jy = v[jj + 1] 336 | kx = v[kk] 337 | ky = v[kk + 1] 338 | shape = [(ix, iy), (jx, jy), (kx, ky)] 339 | cursor.insertRow([shape]) 340 | idx += 3 341 | 342 | parameters[0].value = fc 343 | -------------------------------------------------------------------------------- /media/AddPackages.png: -------------------------------------------------------------------------------- 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https://raw.githubusercontent.com/mraad/space-time-ripple/e78787e60fed889cbe00cbed59acbee4ef0d6577/media/TypeScript.png -------------------------------------------------------------------------------- /mesh/css/main.css: -------------------------------------------------------------------------------- 1 | html, 2 | body { 3 | padding: 0; 4 | margin: 0; 5 | width: 100%; 6 | height: 100%; 7 | color: #c8c8c8; 8 | overflow: hidden; 9 | background-color: #505050; 10 | font-family: 'Helvetica', 'Arial', sans-serif; 11 | } 12 | 13 | .bg { 14 | background-color: rgba(0, 0, 0, 0.5); 15 | } 16 | 17 | #panelView { 18 | position: absolute; 19 | width: 100%; 20 | height: 100%; 21 | display: block; 22 | overflow: hidden; 23 | } 24 | 25 | #panelBottom { 26 | position: absolute; 27 | bottom: 18px; 28 | width: 100%; 29 | height: 80px; 30 | overflow: hidden; 31 | } 32 | 33 | #panelDate { 34 | position: absolute; 35 | top: 10px; 36 | left: 10px; 37 | right: 10px; 38 | height: 20px; 39 | line-height: 20px; 40 | font-size: 18px; 41 | } 42 | 43 | #panelSlider { 44 | position: absolute; 45 | bottom: 10px; 46 | left: 10px; 47 | right: 10px; 48 | height: 30px; 49 | line-height: 30px; 50 | } 51 | 52 | .dijitSliderBar { 53 | border-style: solid; 54 | border-color: black; 55 | background-color: #787878; 56 | cursor: pointer; 57 | -webkit-tap-highlight-color: transparent; 58 | } 59 | 60 | .dijitSliderImageHandle { 61 | margin: 0; 62 | padding: 0; 63 | position: relative !important; 64 | border: 8px solid #ffffff; 65 | width: 0; 66 | height: 0; 67 | border-radius: 8px; 68 | cursor: pointer; 69 | -webkit-tap-highlight-color: transparent; 70 | } 71 | 72 | #panelSettings { 73 | position: absolute; 74 | top: 10px; 75 | right: -240px; 76 | width: 240px; 77 | height: 500px; 78 | font-size: 12px; 79 | -webkit-transition: all 0.5s; 80 | -moz-transition: all 0.5s; 81 | -o-transition: all 0.5s; 82 | transition: all 0.5s; 83 | } 84 | 85 | .open { 86 | right: 0px !important; 87 | } 88 | 89 | #icon { 90 | position: absolute; 91 | left: -40px; 92 | top: 10px; 93 | width: 40px; 94 | height: 48px; 95 | border-radius: 24px 0 0 24px; 96 | line-height: 48px; 97 | background-position: center center; 98 | background-repeat: no-repeat; 99 | background-size: 18px; 100 | background-image: url(../img/gear.png); 101 | cursor: pointer; 102 | } 103 | 104 | .inner { 105 | position: absolute; 106 | left: 10px; 107 | right: 10px; 108 | top: 10px; 109 | bottom: 10px; 110 | } 111 | 112 | .row { 113 | width: 100%; 114 | height: 24px; 115 | line-height: 24px; 116 | } 117 | 118 | .switch { 119 | float: left; 120 | width: 50%; 121 | text-align: center; 122 | background-color: #6e6e6e; 123 | border-radius: 3px; 124 | cursor: pointer; 125 | } 126 | 127 | .on { 128 | background-color: #ffffff; 129 | } 130 | 131 | .swatch { 132 | float: right; 133 | width: 18px; 134 | height: 18px; 135 | cursor: pointer; 136 | margin: 2px; 137 | border: 1px solid #ffffff; 138 | } 139 | 140 | .dijitColorPalette { 141 | border: none !important; 142 | background: transparent !important; 143 | } 144 | 145 | .dijitColorPalette .dijitColorPaletteSwatch { 146 | height: 12px; 147 | width: 12px; 148 | } 149 | 150 | .dijitColorPalette .dijitPaletteImg { 151 | border: none !important; 152 | } 153 | -------------------------------------------------------------------------------- /mesh/favicon.ico: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mraad/space-time-ripple/e78787e60fed889cbe00cbed59acbee4ef0d6577/mesh/favicon.ico -------------------------------------------------------------------------------- /mesh/img/gear.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/mraad/space-time-ripple/e78787e60fed889cbe00cbed59acbee4ef0d6577/mesh/img/gear.png -------------------------------------------------------------------------------- /mesh/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | WebGL Mesh 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
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MESH
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SURFACE
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START COLOR 27 |
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END COLOR 32 |
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RADIUS
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45 | 46 | 47 | -------------------------------------------------------------------------------- /mesh/js/kernel.js: -------------------------------------------------------------------------------- 1 | define(["require", "exports"], function (require, exports) { 2 | "use strict"; 3 | var HMatrix = (function () { 4 | function HMatrix(numRows, numCols) { 5 | this.size = numRows * numCols; 6 | this.cols = numCols; 7 | this.farr = new Float32Array(this.size); 8 | } 9 | HMatrix.prototype.update = function (r, c, w) { 10 | var index = r * this.cols + c; 11 | this.farr[index] += w; 12 | }; 13 | return HMatrix; 14 | }()); 15 | var KernelCalculator = (function () { 16 | function KernelCalculator() { 17 | this.lastRadius = -1.0; 18 | this.blurSize = 0.0; 19 | } 20 | KernelCalculator.prototype.calculateKernel = function (pointArr, size, radius) { 21 | var numRows = size[0], numCols = size[1]; 22 | var maxRows = numRows - 1; 23 | var maxCols = numCols - 1; 24 | var numPoints = pointArr.length; 25 | // Calculate the kernel 26 | if (this.lastRadius !== radius) { 27 | this.lastRadius = radius; 28 | this.blurSize = Math.round(radius * 2.0); 29 | var deno = -2.0 * radius * radius; 30 | var nume = radius / (2.0 * Math.sqrt(2.0 * Math.PI)); 31 | var kernelSize = this.blurSize * 2 + 1; 32 | this.kernel = new Float32Array(kernelSize); 33 | for (var i = 0; i < kernelSize; i++) { 34 | var d0 = i - this.blurSize; 35 | var d2 = d0 * d0; 36 | this.kernel[i] = Math.exp(d2 / deno) * nume; 37 | } 38 | } 39 | // Update "2D" matrix values with kernel weighting 40 | var matrix = new HMatrix(numRows, numCols); 41 | for (var i = 0; i < numPoints; i++) { 42 | var py = pointArr[i].r; 43 | var px = pointArr[i].c; 44 | var sc = px - this.blurSize; 45 | var sr = py - this.blurSize; 46 | var cmin = Math.max(0, sc); 47 | var cmax = Math.min(maxCols, px + this.blurSize); 48 | var rmin = Math.max(0, sr); 49 | var rmax = Math.min(maxRows, py + this.blurSize); 50 | for (var r = rmin; r <= rmax; r++) { 51 | var ky = this.kernel[r - sr]; 52 | for (var c = cmin; c <= cmax; c++) { 53 | matrix.update(r, c, pointArr[i].w * ky * this.kernel[c - sc]); 54 | } 55 | } 56 | } 57 | return matrix.farr; 58 | }; 59 | return KernelCalculator; 60 | }()); 61 | return KernelCalculator; 62 | }); 63 | -------------------------------------------------------------------------------- /mesh/js/kernel.ts: -------------------------------------------------------------------------------- 1 | import promiseUtils = require("esri/core/promiseUtils"); 2 | /** 3 | */ 4 | type HSize = [number, number]; 5 | 6 | interface HPoint { 7 | r: number, 8 | c: number, 9 | w: number 10 | } 11 | 12 | class HMatrix { 13 | size: number; 14 | cols: number; 15 | farr: Float32Array; 16 | 17 | constructor(numRows: number, numCols: number) { 18 | this.size = numRows * numCols; 19 | this.cols = numCols; 20 | this.farr = new Float32Array(this.size); 21 | } 22 | 23 | update(r: number, c: number, w: number) { 24 | const index = r * this.cols + c; 25 | this.farr[index] += w; 26 | } 27 | 28 | } 29 | 30 | class KernelCalculator { 31 | lastRadius: number = -1.0; 32 | blurSize: number = 0.0; 33 | kernel: Float32Array; 34 | 35 | calculateKernel(pointArr: Array, size: HSize, radius: number) { 36 | const [numRows, numCols] = size; 37 | const maxRows = numRows - 1; 38 | const maxCols = numCols - 1; 39 | const numPoints = pointArr.length; 40 | // Calculate the kernel 41 | if (this.lastRadius !== radius) { 42 | this.lastRadius = radius; 43 | this.blurSize = Math.round(radius * 2.0); 44 | const deno = -2.0 * radius * radius; 45 | const nume = radius / (2.0 * Math.sqrt(2.0 * Math.PI)); 46 | const kernelSize = this.blurSize * 2 + 1; 47 | this.kernel = new Float32Array(kernelSize); 48 | for (let i = 0; i < kernelSize; i++) { 49 | const d0 = i - this.blurSize; 50 | const d2 = d0 * d0; 51 | this.kernel[i] = Math.exp(d2 / deno) * nume; 52 | } 53 | } 54 | // Update "2D" matrix values with kernel weighting 55 | const matrix = new HMatrix(numRows, numCols); 56 | for (let i = 0; i < numPoints; i++) { 57 | const py = pointArr[i].r; 58 | const px = pointArr[i].c; 59 | const sc = px - this.blurSize; 60 | const sr = py - this.blurSize; 61 | const cmin = Math.max(0, sc); 62 | const cmax = Math.min(maxCols, px + this.blurSize); 63 | const rmin = Math.max(0, sr); 64 | const rmax = Math.min(maxRows, py + this.blurSize); 65 | for (let r = rmin; r <= rmax; r++) { 66 | const ky = this.kernel[r - sr]; 67 | for (let c = cmin; c <= cmax; c++) { 68 | matrix.update(r, c, pointArr[i].w * ky * this.kernel[c - sc]); 69 | } 70 | } 71 | } 72 | return matrix.farr; 73 | } 74 | 75 | } 76 | 77 | export = KernelCalculator; 78 | -------------------------------------------------------------------------------- /mesh/js/main.js: -------------------------------------------------------------------------------- 1 | require({ 2 | packages: [{ 3 | name: "app", 4 | location: window.location.pathname.substring(0, window.location.pathname.lastIndexOf('/')) + '/js' 5 | }] 6 | }, [ 7 | "dojo/dom", 8 | "dojo/dom-attr", 9 | "dojo/dom-class", 10 | "dojo/dom-construct", 11 | "dojo/dom-style", 12 | "dojo/_base/lang", 13 | "dojo/on", 14 | "esri/Map", 15 | "esri/Camera", 16 | "esri/Color", 17 | "esri/geometry/SpatialReference", 18 | "esri/geometry/Extent", 19 | "esri/views/SceneView", 20 | "esri/views/3d/externalRenderers", 21 | "esri/core/declare", 22 | "dijit/ColorPalette", 23 | "dijit/form/HorizontalSlider", 24 | "app/kernel", 25 | "app/heat", 26 | "dojo/domReady!" 27 | ], function (dom, 28 | domAttr, 29 | domClass, 30 | domConstruct, 31 | domStyle, 32 | lang, 33 | on, 34 | Map, 35 | Camera, 36 | Color, 37 | SpatialReference, 38 | Extent, 39 | SceneView, 40 | externalRenderers, 41 | declare, 42 | ColorPalette, 43 | HorizontalSlider, 44 | KernelCalculator, 45 | appHeat) { 46 | 47 | "use strict"; 48 | 49 | const appData = appHeat.data.data; 50 | const appMesh = appHeat.mesh; 51 | 52 | const MeshRend = declare(null, { 53 | view: null, 54 | vertices: appMesh.vertices, 55 | program: null, 56 | pMatrixUniform: null, 57 | vMatrixUniform: null, 58 | aPosition: null, 59 | uColorOrig: null, 60 | uColorDest: null, 61 | aMult: null, 62 | bufPosition: null, 63 | bufMult: null, 64 | bufIndex: null, 65 | arrPosition: new Float32Array(3 * appMesh.length), 66 | arrColorOrig: [0, 0, 0], 67 | arrColorDest: [0, 0, 0], 68 | arrMult: new Float32Array(appMesh.length), 69 | /** 70 | * Dojo constructor 71 | */ 72 | constructor: function (view) { 73 | this.view = view; 74 | }, 75 | /** 76 | * Called once after this external renderer is added to the scene. 77 | * This is part of the external renderer interface. 78 | */ 79 | setup: function (context) { 80 | try { 81 | this.initShaders(context); 82 | } finally { 83 | context.resetWebGLState(); 84 | } 85 | }, 86 | /** 87 | * Called each time the scene is rendered. 88 | * This is part of the external renderer interface. 89 | */ 90 | render: function (context) { 91 | const gl = context.gl; 92 | 93 | gl.useProgram(this.program); 94 | 95 | gl.enable(gl.DEPTH_TEST); 96 | gl.enable(gl.CULL_FACE); 97 | gl.enable(gl.BLEND); 98 | gl.blendFuncSeparate( 99 | gl.SRC_ALPHA, 100 | gl.ONE_MINUS_SRC_ALPHA, 101 | gl.ONE, 102 | gl.ONE_MINUS_SRC_ALPHA 103 | ); 104 | 105 | var camera = context.camera; 106 | gl.uniformMatrix4fv(this.pMatrixUniform, false, camera.projectionMatrix); 107 | gl.uniformMatrix4fv(this.vMatrixUniform, false, camera.viewMatrix); 108 | 109 | externalRenderers.toRenderCoordinates( 110 | this.view, 111 | this.vertices, 112 | 0, 113 | SpatialReference.WGS84, 114 | this.arrPosition, 115 | 0, 116 | appMesh.length); 117 | 118 | this.draw(gl); 119 | 120 | externalRenderers.requestRender(this.view); 121 | // cleanup 122 | context.resetWebGLState(); 123 | // fix for bug in the JS API 4.2, related to RibbonLineMaterial 124 | gl.blendFuncSeparate( 125 | gl.SRC_ALPHA, 126 | gl.ONE_MINUS_SRC_ALPHA, 127 | gl.ONE, 128 | gl.ONE_MINUS_SRC_ALPHA 129 | ); 130 | }, 131 | draw: function (gl) { 132 | gl.uniform3fv(this.uColorOrig, new Float32Array(this.arrColorOrig)); 133 | gl.uniform3fv(this.uColorDest, new Float32Array(this.arrColorDest)); 134 | 135 | gl.bindBuffer(gl.ARRAY_BUFFER, this.bufPosition); 136 | gl.bufferData(gl.ARRAY_BUFFER, this.arrPosition, gl.STATIC_DRAW); 137 | gl.vertexAttribPointer(this.aPosition, 3, gl.FLOAT, false, 0, 0); 138 | gl.enableVertexAttribArray(this.aPosition); 139 | 140 | gl.bindBuffer(gl.ARRAY_BUFFER, this.bufMult); 141 | gl.bufferData(gl.ARRAY_BUFFER, this.arrMult, gl.STATIC_DRAW); 142 | gl.vertexAttribPointer(this.aMult, 1, gl.FLOAT, false, 0, 0); 143 | gl.enableVertexAttribArray(this.aMult); 144 | 145 | gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.bufIndex); 146 | 147 | const glMode = _mode !== "mesh" ? gl.TRIANGLES : gl.LINES; 148 | gl.drawElements(glMode, appMesh.indices.length, gl.UNSIGNED_SHORT, 0); 149 | }, 150 | initShaders: function (context) { 151 | const gl = context.gl; 152 | const v = 'uniform mat4 uPMatrix;' + 153 | 'uniform mat4 uVMatrix;' + 154 | 'attribute vec3 aPosition;' + 155 | 'attribute float aMult;' + 156 | 'varying float vMult;' + 157 | 'void main(void) {' + 158 | 'vMult = clamp(aMult*2.0,0.0,0.95);' + 159 | 'gl_Position = uPMatrix * uVMatrix * vec4(aPosition, 1.0);' + 160 | 'gl_Position.z -= 1.0;' + 161 | '}'; 162 | const f = 'precision mediump float;' + 163 | 'uniform vec3 uColorOrig;' + 164 | 'uniform vec3 uColorDest;' + 165 | 'varying float vMult;' + 166 | 'void main(void) {' + 167 | 'gl_FragColor = (1.0 - vMult) * vec4(uColorOrig, vMult) + vMult * vec4(uColorDest, vMult);' + 168 | '}'; 169 | 170 | const vShader = gl.createShader(gl.VERTEX_SHADER); 171 | const fShader = gl.createShader(gl.FRAGMENT_SHADER); 172 | 173 | gl.shaderSource(vShader, v); 174 | gl.shaderSource(fShader, f); 175 | 176 | gl.compileShader(vShader); 177 | if (!gl.getShaderParameter(vShader, gl.COMPILE_STATUS)) { 178 | alert(gl.getShaderInfoLog(vShader)); 179 | return; 180 | } 181 | gl.compileShader(fShader); 182 | if (!gl.getShaderParameter(fShader, gl.COMPILE_STATUS)) { 183 | alert(gl.getShaderInfoLog(fShader)); 184 | return; 185 | } 186 | 187 | this.program = gl.createProgram(); 188 | 189 | gl.attachShader(this.program, vShader); 190 | gl.attachShader(this.program, fShader); 191 | 192 | gl.linkProgram(this.program); 193 | if (!gl.getProgramParameter(this.program, gl.LINK_STATUS)) { 194 | alert(gl.getShaderInfoLog(this.program)); 195 | return; 196 | } 197 | 198 | this.pMatrixUniform = gl.getUniformLocation(this.program, 'uPMatrix'); 199 | this.vMatrixUniform = gl.getUniformLocation(this.program, 'uVMatrix'); 200 | 201 | this.aPosition = gl.getAttribLocation(this.program, 'aPosition'); 202 | this.uColorOrig = gl.getUniformLocation(this.program, 'uColorOrig'); 203 | this.uColorDest = gl.getUniformLocation(this.program, 'uColorDest'); 204 | this.aMult = gl.getAttribLocation(this.program, 'aMult'); 205 | 206 | this.bufPosition = gl.createBuffer(); 207 | this.bufMult = gl.createBuffer(); 208 | this.bufIndex = gl.createBuffer(); 209 | 210 | gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, this.bufIndex); 211 | gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(appMesh.indices), gl.STATIC_DRAW); 212 | } 213 | }); 214 | 215 | var map = new Map({ 216 | basemap: 'dark-gray' 217 | }); 218 | 219 | var view = new SceneView({ 220 | container: 'panelView', 221 | map: map, 222 | extent: new Extent({xmin: appMesh.xmin, ymin: appMesh.ymin, xmax: appMesh.xmax, ymax: appMesh.ymax}) 223 | }); 224 | view.then(function () { 225 | updateUI(); 226 | }, function (err) { 227 | alert('Error:' + err); 228 | }); 229 | 230 | var _dtIndex = 0; 231 | var _mode = "mesh"; 232 | var _origColor = "#0000ff"; 233 | var _destColor = "#ff0000"; 234 | var _radius = 2; 235 | var _meshRend; 236 | var _heatmapCalc; 237 | 238 | const _size = [appMesh.rows, appMesh.cols]; 239 | 240 | function updateUI() { 241 | _meshRend = new MeshRend(view); 242 | externalRenderers.add(view, _meshRend); 243 | 244 | _heatmapCalc = new KernelCalculator(); 245 | 246 | new HorizontalSlider({ 247 | value: 0, 248 | minimum: 0, 249 | maximum: Math.max(0, appData.length - 1), 250 | discreteValues: appData.length, 251 | intermediateChanges: true, 252 | showButtons: false, 253 | style: "width:90%;", 254 | onChange: horizontalSlider_changeHandler 255 | }, "panelSlider").startup(); 256 | 257 | on(dom.byId("icon"), "click", toggleSettings); 258 | on(dom.byId("switchMesh"), "click", lang.hitch(this, setMode, "mesh")); 259 | on(dom.byId("switchSurface"), "click", lang.hitch(this, setMode, "surface")); 260 | 261 | new ColorPalette({ 262 | palette: "7x10", 263 | onChange: function (val) { 264 | changeOrigColor(val); 265 | } 266 | }, "startColor").startup(); 267 | 268 | new ColorPalette({ 269 | palette: "7x10", 270 | onChange: function (val) { 271 | changeDestColor(val); 272 | } 273 | }, "endColor").startup(); 274 | 275 | new HorizontalSlider({ 276 | value: 2, 277 | minimum: 1, 278 | maximum: 5, 279 | discreteValues: 10, 280 | intermediateChanges: true, 281 | showButtons: false, 282 | style: "width:90%;", 283 | onChange: radiusSlider_changeHandler 284 | }, "radiusSlider").startup(); 285 | 286 | updateViz(); 287 | } 288 | 289 | function updateViz() { 290 | const sRGB = normalizeRGB(Color.fromHex(_origColor).toRgb()); 291 | const eRGB = normalizeRGB(Color.fromHex(_destColor).toRgb()); 292 | const data = appData[_dtIndex]; 293 | dom.byId("panelDate").innerHTML = data.datetime; 294 | const zArr = _heatmapCalc.calculateKernel(data.points, _size, _radius); 295 | const vertices = appMesh.vertices.slice(0); 296 | var z = 2; 297 | for (var i = 0; i < appMesh.length; i++) { 298 | vertices[z] = 25 + 5000 * zArr[i]; 299 | z += 3; 300 | } 301 | _meshRend.arrColorOrig = sRGB; 302 | _meshRend.arrColorDest = eRGB; 303 | _meshRend.arrMult = zArr; 304 | _meshRend.vertices = vertices; 305 | } 306 | 307 | function normalizeRGB(rgb) { 308 | const r = rgb[0] / 255; 309 | const g = rgb[1] / 255; 310 | const b = rgb[2] / 255; 311 | return [r, g, b]; 312 | } 313 | 314 | function horizontalSlider_changeHandler(index) { 315 | _dtIndex = index; 316 | updateViz(); 317 | } 318 | 319 | function toggleSettings() { 320 | domClass.toggle("panelSettings", "open"); 321 | } 322 | 323 | function setMode(value) { 324 | _mode = value; 325 | if (_mode === "mesh") { 326 | domClass.add("switchMesh", "on"); 327 | domClass.remove("switchSurface", "on"); 328 | } else { 329 | domClass.remove("switchMesh", "on"); 330 | domClass.add("switchSurface", "on"); 331 | } 332 | } 333 | 334 | function changeOrigColor(value) { 335 | _origColor = value; 336 | domStyle.set("startSwatch", "background-color", value); 337 | updateViz(); 338 | } 339 | 340 | function changeDestColor(value) { 341 | _destColor = value; 342 | domStyle.set("endSwatch", "background-color", value); 343 | updateViz(); 344 | } 345 | 346 | function radiusSlider_changeHandler(value) { 347 | _radius = value; 348 | updateViz(); 349 | } 350 | 351 | }); 352 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "space-time-ripple", 3 | "version": "1.0.0", 4 | "description": "Space Time Ripple", 5 | "scripts": { 6 | "test": "echo \"Error: no test specified\" && exit 1" 7 | }, 8 | "repository": { 9 | "type": "git", 10 | "url": "git+https://github.com/mraad/space-time-ripple.git" 11 | }, 12 | "author": "Mansour Raad", 13 | "license": "Apache License 2.0", 14 | "bugs": { 15 | "url": "https://github.com/mraad/space-time-ripple/issues" 16 | }, 17 | "homepage": "https://github.com/mraad/space-time-ripple#readme", 18 | "dependencies": { 19 | "@types/arcgis-js-api": "^4.2.0" 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /tsconfig.json: -------------------------------------------------------------------------------- 1 | { 2 | "compilerOptions": { 3 | "module": "amd", 4 | "target": "es5" 5 | } 6 | } 7 | --------------------------------------------------------------------------------