mirror of
https://github.com/dyuri/repa-shader.git
synced 2025-12-16 11:14:25 +00:00
77 lines
2.3 KiB
HTML
77 lines
2.3 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><repa-shader> demo</title>
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<script type="module" src="../src/repa-texture.js"></script>
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<script type="module" src="../src/repa-shader.js"></script>
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<style>
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body {
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margin: 0;
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padding: 0;
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background: repeating-linear-gradient(45deg, #333, #333 10px, #666 10px, #666 20px);
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min-height: 100vh;
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display: flex;
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align-items: center;
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justify-content: center;
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flex-direction: column;
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}
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#fsinput {
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width: 90vw;
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height: 50vh;
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}
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</style>
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</head>
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<body>
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<repa-shader id="demoshader" fs-input="fsinput" alpha mouse width=512 height=512>
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<repa-texture src="avatar.png" name="tex_avatar" wrap="mirrored_repeat"></repa-texture>
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<repa-texture t3d src="3dt.png" name="test3d" filter="linear" width=32 height=32 depth=32></repa-texture>
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<repa-texture t3d name="generated" filter="linear" width=32 height=32 depth=32></repa-texture>
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void main() {
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vec2 uv = gl_FragCoord.xy / resolution.xy;
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vec3 col = texture(tex_avatar, uv).rgb;
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col *= texture(test3d, vec3(uv.xy, mouse.x)).rrr;
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col *= texture(generated, vec3(uv.xy, mouse.y)).rgb;
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float dist = distance(uv, mouse.xy);
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float circle = smoothstep(.025, .026, dist) * .5 + .5;
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vec4 acolor = vec4(col * circle, circle);
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outColor = vec4(acolor);
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}
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</repa-shader>
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<div>
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<textarea id="fsinput"></textarea>
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</div>
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<button id="update">Update</button>
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<script>
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const updateButton = document.getElementById('update');
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updateButton.addEventListener('click', () => {
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const fsinput = document.getElementById('fsinput');
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const shader = document.querySelector('repa-shader');
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shader.render(fsinput.value);
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});
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setTimeout(() => {
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// generate texture data
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const generated3DT = document.querySelector('repa-texture[name="generated"]');
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const size = 32;
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const t3data = new Uint8Array(size * size * size * 4);
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for (let i = 0; i < size; i++) {
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for (let j = 0; j < size; j++) {
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for (let k = 0; k < size; k++) {
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let index = i * size * size + j * size + k;
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t3data[index*4] = i * 4 % 255;
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t3data[index*4+1] = j * 4 % 255;
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t3data[index*4+2] = k * 4 % 255;
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t3data[index*4+3] = 255;
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}
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}
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}
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generated3DT.content = t3data;
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}, 100);
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</script>
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</body>
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</html>
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