53 lines
No EOL
1.5 KiB
HTML
53 lines
No EOL
1.5 KiB
HTML
<!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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<title>WebGL Demo</title>
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<script id="vertex-shader-2d" type="notjs">
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// an attribute will receive data from a buffer
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attribute vec4 a_position;
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varying vec4 b_position;
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uniform mat4 mat_thing;
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// all shaders have a main function
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void main() {
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// gl_Position is a special variable a vertex shader
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// is responsible for setting
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gl_Position = a_position * mat_thing;
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b_position = a_position;
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}
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</script>
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<script id="fragment-shader-2d" type="notjs">
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// fragment shaders don't have a default precision so we need
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// to pick one. mediump is a good default
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precision mediump float;
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varying vec4 b_position;
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uniform float size_thing;
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uniform float dist_thing;
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void main() {
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// gl_FragColor is a special variable a fragment shader
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// is responsible for setting
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float dist = (log(distance(b_position.xy,vec2(0.0))) - size_thing + dist_thing) / log(2.0) * 0.1;
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gl_FragColor = vec4((mod(dist,0.1) - 0.1 + 0.1 * dist_thing) * 50.0 * vec3(1,1,1),1); // return redish-purple
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}
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</script>
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<script src="/js/twgl.min.js" type="module"></script>
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<script src="/js/index.js" type="module"></script>
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<link rel="stylesheet" href="main.css">
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</head>
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<body>
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<canvas id="c" width="640" height="480"></canvas>
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<div class='hud'>
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hud
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</div>
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</body>
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</html> |