texture content setting refactor, 3d shader example

2026-09-23 19:44:21 +00:00 · 2023-04-05 14:01:47 +02:00
parent 96f41ea6b3
commit 0d5187a310
6 changed files with 75 additions and 10 deletions
@@ -0,0 +1,73 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>&lt;repa-shader&gt; demo</title>
+  <script type="module" src="../src/repa-texture.js"></script>
+  <script type="module" src="../src/repa-shader.js"></script>
+  <style>
+    body {
+      margin: 0;
+      padding: 0;
+      background: repeating-linear-gradient(45deg, #333, #333 10px, #666 10px, #666 20px);
+      min-height: 100vh;
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      flex-direction: column;
+    }
+    #fsinput {
+      width: 90vw;
+      height: 50vh;
+    }
+  </style>
+</head>
+<body>
+  <repa-shader id="demoshader" fs-input="fsinput" alpha mouse snippets="noise.glsl" width=512 height=512>
+    <repa-texture src="avatar.png" name="tex_avatar" wrap="mirrored_repeat"></repa-texture>
+    <repa-texture src="futas.mp4"></repa-texture>
+    <!-- repa-texture filter="nearest">[[1, 2, 3, 4, 5, 6, 128, 255], [255, 128, 64, 32, 4, 3, 2, 1]]</repa-texture -->
+    <!-- repa-texture src="webcam"></repa-texture -->
+    <!-- repa-texture ref="demoshader"></repa-texture -->
+<script type="x-shader/x-fragmen[DELETE]t">
+// https://twigl.app/?ol=true&ss=-NOAlYulOVLklxMdxBDx
+void main() {
+  vec2 n,N,q,p=FC.xy/r.y;
+  float S=9.,a,j;
+  for(mat2 m=rotate2D(5.);j++<30.;){
+    p*=m;
+    n*=m;
+    q=p*S+j+n+t;
+    a+=dot(cos(q)/S,r/r);
+    n+=q=sin(q);
+    N+=q/(S+60.);
+    S*=1.2;
+  }
+  o+=pow(max(o-o,(a+.5)*.1*vec4(6,1,2,0)+.003/length(N)),o-o+.45);
+}
+</script>
+void main() {
+  vec2 uv = gl_FragCoord.xy / resolution.xy;
+  vec3 col = .5 + .5 * cos(uv.xyx + time + vec3(0, 2, 4));
+  col *= texture(tex_avatar, uv).rgb;
+
+  float dist = distance(uv, mouse.xy);
+  float circle = smoothstep(.1, .2, dist) * .5 + .5;
+  vec4 acolor = vec4(col * circle, circle);
+  outColor = vec4(acolor);
+}
+  </repa-shader>
+  <div>
+    <textarea id="fsinput"></textarea>
+  </div>
+  <button id="update">Update</button>
+<script>
+const updateButton = document.getElementById('update');
+updateButton.addEventListener('click', () => {
+  const fsinput = document.getElementById('fsinput');
+  const shader = document.querySelector('repa-shader');
+  shader.render(fsinput.value);
+});
+</script>
+</body>
+</html>