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first pass at actually using sliders

(you must fiddle with the origin first, but it does *something*!)
Lucas Stadler 10 lat temu
rodzic
78d7413bda
commit
584a3a38d9
4 zmienionych plików z 58 dodań i 9 usunięć
Widok podzielony Pokaż statystyki zmian
  1. 3 1
      glsl/findSlider.js
  2. 14 0
      glsl/raymarching.html
  3. 29 2
      glsl/raymarching.js
  4. 12 6
      glsl/sliders.js

+ 3 - 1
glsl/findSlider.js
Wyświetl plik 

@ -43,6 +43,7 @@ if (type == "float") {
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return {name: name, type: type, range: vals};
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}
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function findSliders(input) {
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var vars = [];
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input.split("\n").forEach(function(line) {
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  var slider = findSlider(line);
 
@ -51,4 +52,5 @@ input.split("\n").forEach(function(line) {
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  }
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});
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return vars;
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return vars;
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}

+ 14 - 0
glsl/raymarching.html
Wyświetl plik 

@ -0,0 +1,14 @@
1 
<!doctype html>
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<html>
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  <head>
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    <meta charset="utf-8" />
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    <title>Raymarching!</title>
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  </head>
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  <body>
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    <script src="findSlider.js"></script>
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    <script src="sliders.js"></script>
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    <script src="raymarching.js"></script>
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  </body>
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</html>

+ 29 - 2
glsl/raymarching.js
Wyświetl plik 

@ -150,6 +150,9 @@ mat3 setCamera( in vec3 ro, in vec3 ta, float cr ) {
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  return mat3( cu, cv, cw );
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}
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uniform vec3 origin; //#slider[(-10.0,1.0,10.0),(-10.0,2.0,10.0),(-10.0,-1.0,10.0)]
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uniform vec3 color; //#slider[(0.0, 1.0, 1.0),(0.0,0.0,1.0),(0.0,0.0,1.0)]
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void main() {
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  vec2 q = gl_FragCoord.xy / iResolution.xy;
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  vec2 p = -1.0 + 2.0*q;
 
@ -159,7 +162,8 @@ void main() {
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  float time = 15.0 + 0.0; // iGlobalTime
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  // camera
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  vec3 ro = vec3(1.0, 2.0, -1.0); //vec3( -0.5+3.2*cos(0.1*time + 6.0*mo.x), 1.0 + 2.0*mo.y, 0.5 + 3.2*sin(0.1*time + 6.0*mo.x) );
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  //vec3 ro = vec3(1.0, 2.0, -1.0); //vec3( -0.5+3.2*cos(0.1*time + 6.0*mo.x), 1.0 + 2.0*mo.y, 0.5 + 3.2*sin(0.1*time + 6.0*mo.x) );
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  vec3 ro = origin;
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  vec3 ta = vec3(0.0); //vec3( -0.5, -0.4, 0.5 );
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  // camera-to-world transformation
 
@ -172,7 +176,7 @@ void main() {
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  float dist = trace(ro, rd);
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  vec3 col = vec3(dist, dist, dist);
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  col = mix(vec3(1.0, 0.0, 0.0), col, 0.9);
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  col = mix(color, col, 0.9);
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  //col = pow( col, vec3(0.4545));
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  gl_FragColor = vec4( col, 1.0 );
 
@ -241,7 +245,30 @@ void main() {
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  };
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  render();
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  var sidebarEl = document.createElement("div");
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  sidebarEl.style = `
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    position: absolute;
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    top: 0;
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    right: 0;
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    padding: 1ex;
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    font-family: monospace;
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    font-weight: bold;
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    background-color: rgba(255, 255, 255, 0.5);
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  `;
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  document.body.appendChild(sidebarEl);
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  var sliders = findSliders(fragmentShaderSrc);
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  initSliders(gl, program, sliders, function(ev) {
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    render();
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  });
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  addSliders(sidebarEl, sliders);
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} catch (e) {
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  window.error = e;
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  var msg = document.createElement("pre");
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  msg.style = "color: red; position: absolute; right: 0; bottom: 0";
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  msg.textContent = e;

+ 12 - 6
glsl/sliders.js
Wyświetl plik 

@ -72,10 +72,10 @@ function addSliders(parent, sliders) {
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}
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function initSliders(gl, program, sliders, onChange) {
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  return sliders.map(function(slider) {
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  sliders.forEach(function(slider) {
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    switch (slider.type) {
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      case "float":
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        slider.uniform = gl.uniformLocation(program, slider.name);
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        slider.uniform = gl.getUniformLocation(program, slider.name);
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        slider.onChange = function(ev) {
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          gl.uniform1f(slider.uniform, parseFloat(ev.target.value));
 
@ -90,11 +90,17 @@ function initSliders(gl, program, sliders, onChange) {
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      case "vec2":
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      case "vec3":
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        slider.values = slider.range.map((r) => r[1]);
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        slider.uniform = gl.uniformLocation(program, slider.name);
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        slider.uniform = gl.getUniformLocation(program, slider.name);
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        slider.onChange = function(ev, i) {
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          slider.values[0] = parseFloat(ev.target.value);
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          gl.uniform2f(slider.uniform, slider.values[0], slider.values[1]);
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          if (slider.type == "vec2") {
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            gl.uniform2f(slider.uniform, slider.values[0], slider.values[1]);
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          } else if (slider.type == "vec3") {
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            gl.uniform3f(slider.uniform, slider.values[0], slider.values[1], slider.values[2]);
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          } else {
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            throw new Error("unknown slider type " + slider.type);
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          }
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          if (onChange) {
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            onChange(ev, slider, i);
 
@ -109,6 +115,6 @@ function initSliders(gl, program, sliders, onChange) {
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  });
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}
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var sliders = [{"name":" iPosition","type":"vec3","range":[[0.01,0.52,1.03],[0.04,0.55,1.06],[0.07,0.58,1.09]]},{"name":" iResolution","type":"vec2","range":[[0.01,0.52,1.03],[0.04,0.55,1.06]]},{"name":"fancyness","type":"float","range":[0.01,0.52,1.03]}];
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//var sliders = [{"name":" iPosition","type":"vec3","range":[[0.01,0.52,1.03],[0.04,0.55,1.06],[0.07,0.58,1.09]]},{"name":" iResolution","type":"vec2","range":[[0.01,0.52,1.03],[0.04,0.55,1.06]]},{"name":"fancyness","type":"float","range":[0.01,0.52,1.03]}];
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addSliders(document.body, sliders);
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//addSliders(document.body, sliders);