62 lines
1.7 KiB
HTML
62 lines
1.7 KiB
HTML
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Voronoi Diagram with GPU</title>
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</head>
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<body>
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<div>
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<canvas id="glcanvas" width="512" height="512">
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</canvas>
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</div>
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<script id="vertex-shader" type="x-shader/x-vertex">
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attribute vec2 aVertexPosition;
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varying vec2 uv;
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void main() {
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gl_Position = vec4(aVertexPosition.x, aVertexPosition.y, 0, 1.0);
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uv = vec2(aVertexPosition.x, aVertexPosition.y);
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}
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</script>
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<script id="fragment-shader" type="x-shader/x-fragment">
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#ifdef GL_ES
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precision highp float;
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#endif
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#define POINTS_COUNT %POINTS_COUNT%
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uniform sampler2D diagPointsTex;
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uniform sampler2D diagColorsTex;
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varying vec2 uv;
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void main() {
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int closest = -1;
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float closestDistance = 0.0;
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for (int i = 0; i < POINTS_COUNT; ++i) {
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mediump vec4 _diagPoint = texture2D(diagPointsTex, vec2((float(i)/float(POINTS_COUNT)), 0));
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vec2 diagPoint = vec2(_diagPoint.x, _diagPoint.y);
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float d = length(
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diagPoint - uv
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);
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if (i == 0 || d < closestDistance) {
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closest = i;
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closestDistance = d;
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}
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if (d < 0.008) {
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gl_FragColor = vec4(1, 1, 1, 1);
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return;
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}
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}
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gl_FragColor = texture2D(diagColorsTex, vec2((float(closest)/float(POINTS_COUNT)), 1));
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}
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</script>
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<script src="test3/app.js">
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</script>
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</body>
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</html>
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