topical media & game development
mobile-query-three-docs-symbols-src-plugins-terraingenerator-tquery.terraingenerator.js.htm / htm
<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"> <style>
.KEYW {color: #933;}
.COMM {color: #bbb; font-style: italic;}
.NUMB {color: #393;}
.STRN {color: #393;}
.REGX {color: #339;}
.line {border-right: 1px dotted #666; color: #666; font-style: normal;}
</style></head><body><pre><span class='line'> 1</span> <span class="PUNC">;</span><span class="PUNC">(</span><span class="KEYW">function</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 2</span>
<span class='line'> 3</span> </span><span class="COMM">
<span class='line'> 4</span> * Generate a light map
<span class='line'> 5</span> * TODO make it more tunable
<span class='line'> 6</span> * TODO make that usable standalone
<span class='line'> 7</span>
</span><span class="WHIT">
<span class='line'> 8</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">generateTexture</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">data</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 9</span>
<span class='line'> 10</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">sun</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">THREE.Vector3</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0.5</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 11</span> </span><span class="WHIT"> </span><span class="NAME">sun.normalize</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 12</span>
<span class='line'> 13</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">canvas</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">document.createElement</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="STRN">'canvas'</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 14</span> </span><span class="WHIT"> </span><span class="NAME">canvas.width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 15</span> </span><span class="WHIT"> </span><span class="NAME">canvas.height</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 16</span>
<span class='line'> 17</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">context</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">canvas.getContext</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="STRN">'2d'</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 18</span> </span><span class="WHIT"> </span><span class="NAME">context.fillStyle</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="STRN">'#000'</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 19</span> </span><span class="WHIT"> </span><span class="NAME">context.fillRect</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 20</span>
<span class='line'> 21</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">image</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">context.getImageData</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">canvas.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">canvas.height</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 22</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">image.data</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 23</span>
<span class='line'> 24</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">minColor</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">THREE.Color</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">setRGB</span><span class="PUNC">(</span><span class="NUMB">0.375</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0.125</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 25</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">rngColor</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">THREE.Color</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">.</span><span class="NAME">setRGB</span><span class="PUNC">(</span><span class="NUMB">0.5</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0.375</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0.375</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 26</span>
<span class='line'> 27</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">normal</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">THREE.Vector3</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 28</span> </span><span class="WHIT"> </span><span class="KEYW">for</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">l</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">imageData.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NAME">l</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">4</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">++</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 29</span> </span><span class="WHIT"> </span><span class="COMM">// compute the normal</span><span class="WHIT">
<span class='line'> 30</span> </span><span class="WHIT"> </span><span class="NAME">normal.x</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">data</span><span class="PUNC">[</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="WHIT"> </span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">data</span><span class="PUNC">[</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="WHIT"> </span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 31</span> </span><span class="WHIT"> </span><span class="NAME">normal.y</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 32</span> </span><span class="WHIT"> </span><span class="NAME">normal.z</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">data</span><span class="PUNC">[</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="WHIT"> </span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">-</span><span class="WHIT"> </span><span class="NAME">data</span><span class="PUNC">[</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="WHIT"> </span><span class="PUNC">]</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 33</span> </span><span class="WHIT"> </span><span class="NAME">normal.normalize</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 34</span> </span><span class="WHIT"> </span><span class="COMM">// compute the shade</span><span class="WHIT">
<span class='line'> 35</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">shade</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">normal.dot</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">sun</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 36</span> </span><span class="WHIT"> </span><span class="COMM">// fill the pixel</span><span class="WHIT">
<span class='line'> 37</span> </span><span class="WHIT"> </span><span class="COMM">// - make color tunable</span><span class="WHIT">
<span class='line'> 38</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">factor</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">256.0</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NUMB">0.5</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">data</span><span class="PUNC">[</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">0.015</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 39</span> </span><span class="WHIT"> </span><span class="COMM">//var factor = 256.0;</span><span class="WHIT">
<span class='line'> 40</span> </span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="PUNC">[</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">minColor.r</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">shade</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">rngColor.r</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">factor</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 41</span> </span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="PUNC">[</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">minColor.g</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">shade</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">rngColor.g</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">factor</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 42</span> </span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="PUNC">[</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="PUNC">(</span><span class="NAME">minColor.b</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">shade</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">rngColor.b</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">factor</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 43</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 44</span> </span><span class="WHIT"> </span><span class="COMM">// draw the image in a canvas</span><span class="WHIT">
<span class='line'> 45</span> </span><span class="WHIT"> </span><span class="NAME">context.putImageData</span><span class="PUNC">(</span><span class="NAME">image</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 46</span>
<span class='line'> 47</span> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">canvas</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 48</span>
<span class='line'> 49</span> </span><span class="WHIT"> </span><span class="COMM">// Scaled 4x</span><span class="WHIT">
<span class='line'> 50</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">canvasScaled</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">document.createElement</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="STRN">'canvas'</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 51</span> </span><span class="WHIT"> </span><span class="NAME">canvasScaled.width</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">4</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 52</span> </span><span class="WHIT"> </span><span class="NAME">canvasScaled.height</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">4</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 53</span>
<span class='line'> 54</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">context</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">canvasScaled.getContext</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="STRN">'2d'</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 55</span> </span><span class="WHIT"> </span><span class="NAME">context.scale</span><span class="PUNC">(</span><span class="NUMB">4</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">4</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 56</span> </span><span class="WHIT"> </span><span class="NAME">context.drawImage</span><span class="PUNC">(</span><span class="NAME">canvas</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 57</span>
<span class='line'> 58</span>
<span class='line'> 59</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">image</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">context.getImageData</span><span class="PUNC">(</span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">canvasScaled.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">canvasScaled.height</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 60</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">image.data</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 61</span> </span><span class="WHIT"> </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NAME">imageData.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">4</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 62</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">v</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Math.floor</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">Math.random</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">5</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 63</span> </span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="PUNC">[</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">v</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 64</span> </span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="PUNC">[</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">v</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 65</span> </span><span class="WHIT"> </span><span class="NAME">imageData</span><span class="PUNC">[</span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NUMB">2</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">v</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 66</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 67</span> </span><span class="WHIT"> </span><span class="NAME">context.putImageData</span><span class="PUNC">(</span><span class="NAME">image</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 68</span>
<span class='line'> 69</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">canvasScaled</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 70</span>
<span class='line'> 71</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 72</span>
<span class='line'> 73</span> </span><span class="COMM">
<span class='line'> 74</span> * Generate a terrain from Perlin
<span class='line'> 75</span> * TODO make it more tunable
<span class='line'> 76</span> * TODO make that usable standalone
<span class='line'> 77</span>
</span><span class="WHIT">
<span class='line'> 78</span> </span><span class="KEYW">function</span><span class="WHIT"> </span><span class="NAME">generateHeight</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="WHIT">
<span class='line'> 79</span> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 80</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">size</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 81</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">heights</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">Float32Array</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">size</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 82</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">perlin</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">ImprovedNoise</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 83</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">z</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Math.random</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">100</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 84</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">quality</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">1</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 85</span>
<span class='line'> 86</span> </span><span class="WHIT"> </span><span class="COMM">// zero the heights</span><span class="WHIT">
<span class='line'> 87</span> </span><span class="WHIT"> </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NAME">size</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">++</span><span class="PUNC">)</span><span class="WHIT"> </span><span class="NAME">heights</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 88</span>
<span class='line'> 89</span> </span><span class="COMM">// TODO find out what are all those constant and make them tunable</span><span class="WHIT">
<span class='line'> 90</span>
<span class='line'> 91</span> </span><span class="WHIT"> </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">j</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NUMB">4</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">j</span><span class="PUNC">++</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 92</span> </span><span class="WHIT"> </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">y</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">y</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NAME">height</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">y</span><span class="PUNC">++</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 93</span> </span><span class="WHIT"> </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">x</span><span class="PUNC">++</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">i</span><span class="PUNC">++</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'> 94</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="WHIT"> </span><span class="NAME">y</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">width</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 95</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">noise</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">perlin.noise</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">x</span><span class="WHIT"> </span><span class="PUNC">/</span><span class="WHIT"> </span><span class="NAME">quality</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">y</span><span class="WHIT"> </span><span class="PUNC">/</span><span class="WHIT"> </span><span class="NAME">quality</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">z</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 96</span> </span><span class="WHIT"> </span><span class="NAME">heights</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">+</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">Math.abs</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">noise</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NAME">quality</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="WHIT"> </span><span class="NUMB">1.75</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="NUMB">2</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'> 97</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 98</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'> 99</span> </span><span class="WHIT"> </span><span class="NAME">quality</span><span class="WHIT"> </span><span class="PUNC">*</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">5</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>100</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>101</span> </span><span class="WHIT"> </span><span class="COMM">// return the generated heights</span><span class="WHIT">
<span class='line'>102</span> </span><span class="WHIT"> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="NAME">heights</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>103</span> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>104</span>
<span class='line'>105</span>
<span class='line'>106</span> </span><span class="COMM">
<span class='line'>107</span> * terrain generator geometry
<span class='line'>108</span> *
<span class='line'>109</span> * all hard work in http://mrdoob.github.com/three.js/examples/webgl_geometry_terrain.html
class='line'>110</span>
</span><span class="WHIT">
<span class='line'>111</span> </span><span class="NAME">tQuery.register</span><span class="PUNC">(</span><span class="STRN">'generateTerrainGeometry'</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="KEYW">function</span><span class="PUNC">(</span><span class="NAME">opts</span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>112</span> </span><span class="WHIT">
<span class='line'>113</span> </span><span class="NAME">opts</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">tQuery.extend</span><span class="PUNC">(</span><span class="NAME">opts</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>114</span> </span><span class="WHIT"> </span><span class="NAME">width</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">10</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>115</span> </span><span class="WHIT"> </span><span class="NAME">height</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">10</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>116</span> </span><span class="WHIT"> </span><span class="NAME">segmentsW</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">128</span><span class="PUNC">*</span><span class="NUMB">2</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>117</span> </span><span class="WHIT"> </span><span class="NAME">segmentsH</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NUMB">128</span><span class="PUNC">*</span><span class="NUMB">2</span><span class="WHIT">
<span class='line'>118</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>119</span>
<span class='line'>120</span> </span><span class="WHIT"> </span><span class="COMM">// build basic geometry</span><span class="WHIT">
<span class='line'>121</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">tGeometry</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">THREE.PlaneGeometry</span><span class="PUNC">(</span><span class="NAME">opts.width</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">opts.height</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">opts.segmentsW</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">opts.segmentsH</span><span class="PUNC">-</span><span class="NUMB">1</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>122</span> </span><span class="WHIT"> </span><span class="NAME">tGeometry.dynamic</span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>123</span>
<span class='line'>124</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">heights</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">generateHeight</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">opts.segmentsW</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">opts.segmentsH</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>125</span> </span><span class="KEYW">for</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NUMB">0</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC"><</span><span class="WHIT"> </span><span class="NAME">tGeometry.vertices.length</span><span class="PUNC">;</span><span class="WHIT"> </span><span class="NAME">i</span><span class="WHIT"> </span><span class="PUNC">++</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>126</span> </span><span class="COMM">// TODO find out what are all those constant and make them tunable</span><span class="WHIT">
<span class='line'>127</span> </span><span class="WHIT"> </span><span class="NAME">tGeometry.vertices</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="PUNC">.</span><span class="NAME">position.z</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">heights</span><span class="PUNC">[</span><span class="NAME">i</span><span class="PUNC">]</span><span class="WHIT"> </span><span class="PUNC">/</span><span class="WHIT"> </span><span class="NUMB">375</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>128</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="WHIT">
<span class='line'>129</span> </span><span class="WHIT">
<span class='line'>130</span> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">canvas</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="NAME">generateTexture</span><span class="PUNC">(</span><span class="WHIT"> </span><span class="NAME">heights</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">opts.segmentsW</span><span class="PUNC">,</span><span class="WHIT"> </span><span class="NAME">opts.segmentsH</span><span class="WHIT"> </span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>131</span> </span><span class="WHIT"> </span><span class="KEYW">var</span><span class="WHIT"> </span><span class="NAME">texture</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">new</span><span class="WHIT"> </span><span class="NAME">THREE.Texture</span><span class="PUNC">(</span><span class="NAME">canvas</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>132</span> </span><span class="WHIT"> </span><span class="NAME">texture.needsUpdate</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>133</span>
<span class='line'>134</span> </span><span class="WHIT"> </span><span class="COMM">// mark the vertices as dirty</span><span class="WHIT">
<span class='line'>135</span> </span><span class="WHIT"> </span><span class="NAME">tGeometry.__dirtyVertices</span><span class="WHIT"> </span><span class="PUNC">=</span><span class="WHIT"> </span><span class="KEYW">true</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>136</span> </span><span class="WHIT"> </span><span class="NAME">tGeometry.computeBoundingBox</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>137</span> </span><span class="WHIT"> </span><span class="NAME">tGeometry.computeCentroids</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>138</span> </span><span class="NAME">tGeometry.computeFaceNormals</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>139</span> </span><span class="WHIT"> </span><span class="NAME">tGeometry.computeVertexNormals</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>140</span> </span><span class="WHIT">
<span class='line'>141</span> </span><span class="KEYW">return</span><span class="WHIT"> </span><span class="PUNC">{</span><span class="WHIT">
<span class='line'>142</span> </span><span class="WHIT"> </span><span class="NAME">geometry</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NAME">tQuery</span><span class="PUNC">(</span><span class="NAME">tGeometry</span><span class="PUNC">)</span><span class="PUNC">,</span><span class="WHIT">
<span class='line'>143</span> </span><span class="WHIT"> </span><span class="NAME">texture</span><span class="WHIT"> </span><span class="PUNC">:</span><span class="WHIT"> </span><span class="NAME">texture</span><span class="WHIT">
<span class='line'>144</span> </span><span class="WHIT"> </span><span class="PUNC">}</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>145</span> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">;</span><span class="WHIT">
<span class='line'>146</span>
<span class='line'>147</span> </span><span class="PUNC">}</span><span class="PUNC">)</span><span class="PUNC">(</span><span class="PUNC">)</span><span class="PUNC">;</span></pre></body></html>
(C) Æliens
04/09/2009
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