mirror of
https://github.com/dyuri/repa-shader.git
synced 2025-12-16 11:14:25 +00:00
69 lines
1.8 KiB
HTML
69 lines
1.8 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-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 fs-input="fsinput" alpha mouse snippets="noise.glsl" width=512 height=512>
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<script type="x-shader/x-fragment">
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void main() {
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vec2 uv = gl_FragCoord.xy / resolution.xy;
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vec3 col = .5 + .5 * cos(uv.xyx + time + vec3(0, 2, 4));
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float dist = distance(uv, mouse);
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float circle = smoothstep(.15, .2, dist);
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vec4 acolor = vec4(col * (1. - circle), (1. - circle)) + circle * texture(backbuffer, uv - vec2(.01, .01)) * .9;
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outColor = vec4(acolor);
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}
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</script>
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<script type="x-shader/x-fragmen">
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// https://twigl.app/?ol=true&ss=-NOAlYulOVLklxMdxBDx
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void main() {
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vec2 n,N,q,p=FC.xy/r.y;
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float S=9.,a,j;
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for(mat2 m=rotate2D(5.);j++<30.;){
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p*=m;
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n*=m;
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q=p*S+j+n+t;
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a+=dot(cos(q)/S,r/r);
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n+=q=sin(q);
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N+=q/(S+60.);
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S*=1.2;
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}
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o+=pow(max(o-o,(a+.5)*.1*vec4(6,1,2,0)+.003/length(N)),o-o+.45);
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}
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</script>
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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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</script>
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</body>
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</html>
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