JadeOolong/testWebGL.html at master · LyonsLab/JadeOolong · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <title>twgl.js - primitives</title>
    <style>
      html, body {
        margin: 0px;
        width: 100%;
        height: 100%;
        overflow: hidden;
        font-family: monospace;
      }
      canvas {
        width: 100%;
        height: 100%;
      }
      #b {
        position: absolute;
        top: 10px;
        width: 100%;
        text-align: center;
        z-index: 2;
      }
    </style>
  </head>
  <body>
    <canvas id="c"></canvas>
    <div id="b">WebGL Performance Test</div>
  </body>
  <script id="vs" type="notjs">
uniform mat4 u_worldViewProjection;
uniform vec3 u_lightWorldPos;
uniform mat4 u_world;
uniform mat4 u_viewInverse;
uniform mat4 u_worldInverseTranspose;

attribute vec4 a_position;
attribute vec3 a_normal;
attribute vec2 a_texcoord;

varying vec4 v_position;
varying vec2 v_texCoord;
varying vec3 v_normal;
varying vec3 v_surfaceToLight;
varying vec3 v_surfaceToView;

void main() {
  v_texCoord = a_texcoord;
  v_position = (u_worldViewProjection * a_position);
  v_normal = (u_worldInverseTranspose * vec4(a_normal, 0)).xyz;
  v_surfaceToLight = u_lightWorldPos - (u_world * a_position).xyz;
  v_surfaceToView = (u_viewInverse[3] - (u_world * a_position)).xyz;
  gl_Position = v_position;
}
  </script>
  <script id="fs" type="notjs">
precision mediump float;

varying vec4 v_position;
varying vec2 v_texCoord;
varying vec3 v_normal;
varying vec3 v_surfaceToLight;
varying vec3 v_surfaceToView;

uniform vec4 u_lightColor;
uniform vec4 u_diffuseMult;
uniform sampler2D u_diffuse;
uniform vec4 u_specular;
uniform float u_shininess;
uniform float u_specularFactor;

vec4 lit(float l ,float h, float m) {
  return vec4(1.0,
              abs(l),//max(l, 0.0),
              (l > 0.0) ? pow(max(0.0, h), m) : 0.0,
              1.0);
}

void main() {
  vec4 diffuseColor = texture2D(u_diffuse, v_texCoord) * u_diffuseMult;
  vec3 a_normal = normalize(v_normal);
  vec3 surfaceToLight = normalize(v_surfaceToLight);
  vec3 surfaceToView = normalize(v_surfaceToView);
  vec3 halfVector = normalize(surfaceToLight + surfaceToView);
  vec4 litR = lit(dot(a_normal, surfaceToLight),
                    dot(a_normal, halfVector), u_shininess);
  vec4 outColor = vec4((
  u_lightColor * (diffuseColor * litR.y +
                u_specular * litR.z * u_specularFactor)).rgb,
      diffuseColor.a);
  gl_FragColor = outColor;
}
  </script>
  <script src="./js/twgl/dist/twgl-full.min.js"></script>
  <script src="./js/twgl/3rdparty/chroma.min.js"></script>
  <script>
    "use strict";
    var startTime = new Date().getTime();
    twgl.setAttributePrefix("a_");
    var m4 = twgl.m4;
    var gl = twgl.getWebGLContext(document.getElementById("c"));
    var programInfo = twgl.createProgramInfo(gl, ["vs", "fs"]);

    var shapes = [
      twgl.primitives.createSphereBufferInfo(gl, 0.1, 24, 12)
    ];

    function rand(min, max) {
      return min + Math.random() * (max - min);
    }

    // Shared values
    var lightWorldPosition = [1, 8, -10];
    var lightColor = [1, 1, 1, 1];
    var camera = m4.identity();
    var view = m4.identity();
    var viewProjection = m4.identity();

/*     var tex = twgl.createTexture(gl, {
      min: gl.NEAREST,
      mag: gl.NEAREST,
      src: [
        255, 255, 255, 255,
        192, 192, 192, 255,
        192, 192, 192, 255,
        255, 255, 255, 255,
      ],
    }); */

    //var objects = [];
    var drawObjects = [];
    var numObjects = 10*1000;
    var baseHue = rand(0, 360);
    for (var ii = 0; ii < numObjects; ++ii) {
        var uniforms = {
            //u_lightWorldPos: lightWorldPosition,
            //u_lightColor: lightColor,
            u_diffuseMult: chroma.hsv((baseHue + rand(0, 60)) % 360, 0.4, 0.8).gl(),
            //u_specular: [1, 1, 1, 1],
            //u_shininess: 50,
            //u_specularFactor: 1,
            //u_diffuse: tex,
            u_viewInverse: camera,
            u_world: m4.identity(),
            u_worldInverseTranspose: m4.identity(),
            u_worldViewProjection: m4.identity(),
        };

        drawObjects.push({
            programInfo: programInfo,
            bufferInfo: shapes[ii % shapes.length],
            uniforms: uniforms,
        });
    }

    // Position objects
    var projection = m4.perspective(30 * Math.PI / 180, gl.canvas.clientWidth / gl.canvas.clientHeight, 0.5, 100);
    var eye = [1, 4, -50];
    var target = [0, 0, 0];
    var up = [0, 1, 0];

    m4.lookAt(eye, target, up, camera);
    m4.inverse(camera, view);
    m4.multiply(view, projection, viewProjection);
    drawObjects.forEach(function(obj) {
        var uni = obj.uniforms;
        var randVal = rand(1, 1000);
        var world = uni.u_world;
        m4.identity(world);
        m4.translate(world, [rand(-10, 10), rand(-10, 10), rand(-10, 10)], world);
        m4.transpose(m4.inverse(world, uni.u_worldInverseTranspose), uni.u_worldInverseTranspose);
        m4.multiply(uni.u_world, viewProjection, uni.u_worldViewProjection);
    });

    // Setup input event handlers
    var zPos = 1;
    window.onkeypress = function(event) {
    	if (event.keyCode == 97) {
            drawObjects.forEach(function(obj) {
                var uni = obj.uniforms;
                var randVal = rand(1, 1000);
                var world = uni.u_world;
                m4.identity(world);
                //m4.translate(world, [rand(-10, 10), rand(-10, 10), rand(-10, 10)], world);
                m4.transpose(m4.inverse(world, uni.u_worldInverseTranspose), uni.u_worldInverseTranspose);
                m4.rotateX(world, 30 * Math.PI / 180, world);
                m4.rotateY(world, 30 * Math.PI / 180, world);
                m4.rotateZ(world, 30 * Math.PI / 180, world);
                m4.multiply(uni.u_world, viewProjection, uni.u_worldViewProjection);
            });

    		requestAnimationFrame(render);
    	}
    	else if (event.keyCode == 115) {

    	}
    };

    // Render function
    function render() {
        twgl.resizeCanvasToDisplaySize(gl.canvas);
        gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);

        gl.enable(gl.DEPTH_TEST);
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);

        twgl.drawObjectList(gl, drawObjects);

        //requestAnimationFrame(render);
    }
    requestAnimationFrame(render);

    console.log("done " + (new Date().getTime()-startTime) + "ms");
  </script>
</html>