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main.js
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var gl;
var tracer = {};
//necessary extensions
var OES_texture_float;
var OES_texture_float_linear;
var OES_texture_half_float;
var OES_texture_half_float_linear;
var OES_standard_derivatives;
var WEBGL_draw_buffers;
var WEBGL_depth_texture;
// shader programs
var poolProg;
var skyProg;
var waterProg = [];
var heightProg;
var causticProg;
var normalProg;
var simulateProg;
var objProg;
var objectProg;
var depthProg;
var windProg;
var rainProg;
var godrayProg;
var postProg;
var reflectProg;
//rendering
var framebuffer;
var renderbuffer;
var framebuffer1;
var renderbuffer1;
var textureSize = 256;
var textureSize1 = 512;
var textureSize2 = 1024;
// matrices
var mvMatrix = mat4.create();
var mvMatrixStack = [];
var pMatrix = mat4.create();
var nmlMatrix = mat4.create();
var eyePos;
var radius = 4.0;
var azimuth = 0.5*Math.PI;
var elevation = 0.5;
var fov = 45.0;
var eye = sphericalToCartesian(radius, azimuth, elevation);
var center = [0.0, 0.0, 0.0];
var up = [0.0, 1.0, 0.0];
var view = mat4.create();
mat4.lookAt(eye, center, up, view);
//fps
var numFramesToAverage = 16;
var frameTimeHistory = [];
var frameTimeIndex = 0;
var totalTimeForFrames = 0;
var then = Date.now() / 1000;
// animating
var accumTime = 0;
//mouse interaction
var time = 0;
var mouseLeftDown = false;
var mouseRightDown = false;
var lastMouseX = null;
var lastMouseY = null;
var preHit = vec3.create(0.0);
//var nxtHit = vec3.create(0.0);
var viewportNormal = vec3.create(0.0);
var mode = 0; // 0- mouse click interaction, 1-sphere interaction
var pool = {}; //a cube without top plane
var sky = {}; //a cube
var water = {}; //a plane
var quad = {};
var sphere = {};
var objRaw; //raw primitive data for obj loading
var objModel; //processed gl object data for obj
var depthModel = {}; //put tmp necessary vbo, ibo info into this object, for drawing depth
var depthTexture; //for light-based depth rendering
var colorTexture; //for light-based depth rendering
var depthTexture2; //for camera-based depth rendering
var colorTexture2; //for camera-based depth rendering
var depthTexture3; //for reflection-based depth rendering
var colorTexture3; //for reclection-based depth rendering
var lightInvDir = vec3.normalize(vec3.create([0.5,1.2,0.3]));
var lightMatrix = mat4.create(); //model view matrix for light
var lightProj = mat4.create(); //projection matrix for light
var reflectProj = mat4.create();
var reflectModelView = mat4.create();
var perm = [151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225,
140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23, 190, 6, 148,
247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32,
57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175,
74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122,
60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54,
65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169,
200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64,
52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212,
207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213,
119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9,
129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104,
218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241,
81, 51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157,
184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93,
222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180 ];
// var grad = [ [1,1,0], [-1,1,0], [1,-1,0], [-1,-1,0],
// [1,0,1], [-1,0,1], [1,0,-1], [-1,0,-1],
// [0,1,1], [0,-1,1], [0,1,-1], [0,-1,-1],
// [1,1,0], [0,-1,1], [-1,1,0], [0,-1,-1] ];
var grad = [ 1,1,0, -1,1,0, 1,-1,0, -1,-1,0,
1,0,1, -1,0,1, 1,0,-1, -1,0,-1,
0,1,1, 0,-1,1, 0,1,-1, 0,-1,-1,
1,1,0, 0,-1,1, -1,1,0, 0,-1,-1 ];
var permTexture;
var gradTexture;
var objTexture;
var reflectTexture;
//user input
var u_CausticOnLocation;
var isSphere;
var sphereRadius;
var currentPoolPattern;
var isGodray;
var rainCounter = 0;
function sphericalToCartesian( r, a, e ) {
var x = r * Math.cos(e) * Math.cos(a);
var y = r * Math.sin(e);
var z = r * Math.cos(e) * Math.sin(a);
return [x,y,z];
}
function initGL(canvas) {
try {
gl = canvas.getContext("experimental-webgl");
gl.viewportWidth = canvas.width;
gl.viewportHeight = canvas.height;
} catch (e) {
}
if (!gl) {
alert("Initializing WebGL failed.");
}
}
function getShader(gl, id) {
var shaderScript = document.getElementById(id);
if (!shaderScript) {
return null;
}
var str = "";
var k = shaderScript.firstChild;
while (k) {
if (k.nodeType == 3) {
str += k.textContent;
}
k = k.nextSibling;
}
var shader;
if (shaderScript.type == "x-shader/x-fragment") {
shader = gl.createShader(gl.FRAGMENT_SHADER);
} else if (shaderScript.type == "x-shader/x-vertex") {
shader = gl.createShader(gl.VERTEX_SHADER);
} else {
return null;
}
gl.shaderSource(shader, str);
gl.compileShader(shader);
if (!gl.getShaderParameter(shader, gl.COMPILE_STATUS)) {
alert(gl.getShaderInfoLog(shader));
return null;
}
return shader;
}
window.onload = function() {
var gui = new dat.GUI();
//var gui = new dat.GUI({ autoPlace: false });
// var customContainer = document.getElementById('gui-container');
// customContainer.appendChild(gui.domElement);
gui.add(parameters, 'Caustic');
gui.add(parameters, 'Wind');
gui.add(parameters, 'Rain');
gui.add(parameters, 'Object', [ 'sphere', 'duck']);
gui.add(parameters, 'Pool_Pattern', ['white brick', 'marble', 'blue tile', 'golden tile']);
gui.add(parameters, 'Sphere_Radius', 0.1, 0.5);
gui.add(parameters, 'God_rays');
var f1 = gui.addFolder('Debug Image');
f1.add(parameters, 'Depth_From_Light');
f1.add(parameters, 'Depth_From_Camera');
f1.add(parameters, 'Reflection_Texture');
f1.add(parameters, 'Draw_Obj_Reflection');
};
var parameters = new function(){
this.Caustic = true;
this.Object = "duck";
this.Pool_Pattern = "white brick";
this.Sphere_Radius = 0.25;
this.Wind = true;
this.Rain = false;
this.Depth_From_Light = false;
this.Depth_From_Camera = false;
this.God_rays = false;
this.Reflection_Texture = false;
this.Draw_Obj_Reflection = false;
}
function initShaders() {
//-----------------------pool------------------------------
poolProg = gl.createProgram();
gl.attachShader(poolProg, getShader(gl, "pool-vs") );
gl.attachShader( poolProg, getShader(gl, "pool-fs") );
gl.linkProgram(poolProg);
if (!gl.getProgramParameter(poolProg, gl.LINK_STATUS)) {
alert("Could not initialize pool shader.");
}
gl.useProgram(poolProg);
poolProg.vertexPositionAttribute = gl.getAttribLocation(poolProg, "aVertexPosition");
poolProg.textureCoordAttribute = gl.getAttribLocation(poolProg, "aTextureCoord");
poolProg.vertexNormalAttribute = gl.getAttribLocation(poolProg, "aVertexNormal");
poolProg.pMatrixUniform = gl.getUniformLocation(poolProg, "uPMatrix");
poolProg.mvMatrixUniform = gl.getUniformLocation(poolProg, "uMVMatrix");
poolProg.nmlMatrixUniform = gl.getUniformLocation(poolProg, "uNmlMatrix");
poolProg.lightMatrixUniform = gl.getUniformLocation(poolProg, "uLightMatrix");
poolProg.lightProjUniform = gl.getUniformLocation(poolProg, "uLightProj");
poolProg.samplerTileUniform = gl.getUniformLocation(poolProg, "uSamplerTile");
poolProg.samplerWaterUniform = gl.getUniformLocation(poolProg, "uSamplerWater");
poolProg.samplerCausticUniform = gl.getUniformLocation(poolProg, "uSamplerCaustic");
poolProg.samplerDepthUniform = gl.getUniformLocation(poolProg, "uSamplerDepth");
poolProg.samplerGodrayUniform = gl.getUniformLocation(poolProg, "uSamplerGodray");
poolProg.sphereRadiusUniform = gl.getUniformLocation(poolProg, "uSphereRadius");
poolProg.sphereCenterUniform = gl.getUniformLocation(poolProg, "uSphereCenter");
poolProg.causticOnUniform = gl.getUniformLocation(poolProg, "uCausticOn");
poolProg.isSphereUniform = gl.getUniformLocation(poolProg, "uIsSphere");
//-----------------------sphere------------------------------
objProg = gl.createProgram();
gl.attachShader(objProg, getShader(gl, "obj-vs") );
gl.attachShader(objProg, getShader(gl, "obj-fs") );
gl.linkProgram(objProg);
if (!gl.getProgramParameter(objProg, gl.LINK_STATUS)) {
alert("Could not initialize obj shader.");
}
gl.useProgram(objProg);
objProg.vertexPositionAttribute = gl.getAttribLocation(objProg, "aVertexPosition");
// objProg.textureCoordAttribute = gl.getAttribLocation(objProg, "aTextureCoord");
objProg.vertexNormalAttribute = gl.getAttribLocation(objProg, "aVertexNormal");
objProg.pMatrixUniform = gl.getUniformLocation(objProg, "uPMatrix");
objProg.mvMatrixUniform = gl.getUniformLocation(objProg, "uMVMatrix");
objProg.nmlMatrixUniform = gl.getUniformLocation(objProg, "uNmlMatrix");
objProg.centerUniform = gl.getUniformLocation(objProg, "uCenter");
objProg.sphereCenterUniform = gl.getUniformLocation(objProg, "uSphereCenter");
objProg.sphereRadiusUniform = gl.getUniformLocation(objProg, "uSphereRadius");
objProg.samplerWaterUniform = gl.getUniformLocation(objProg, "uSamplerWater");
objProg.samplerCausticUniform = gl.getUniformLocation(objProg, "uSamplerCaustic");
objProg.isSphereUniform = gl.getUniformLocation(objProg, "uIsSphere");
objProg.causticOnUniform = gl.getUniformLocation(objProg, "uCausticOn");
//objProg.RadiusUniform = gl.getUniformLocation(objProg, "uRadius");
// objProg.diffuseColorUniform = gl.getUniformLocation(objProg, "uDiffuseColor");
// objProg.samplerTileUniform = gl.getUniformLocation(objProg, "uSampler");
//-----------------------sky------------------------------
skyProg = gl.createProgram();
gl.attachShader(skyProg, getShader(gl, "sky-vs") );
gl.attachShader( skyProg, getShader(gl, "sky-fs") );
gl.linkProgram(skyProg);
if (!gl.getProgramParameter(skyProg, gl.LINK_STATUS)) {
alert("Could not initialize sky shader.");
}
gl.useProgram(skyProg);
skyProg.vertexPositionAttribute = gl.getAttribLocation(skyProg, "aVertexPosition");
skyProg.pMatrixUniform = gl.getUniformLocation(skyProg, "uPMatrix");
skyProg.mvMatrixUniform = gl.getUniformLocation(skyProg, "uMVMatrix");
skyProg.samplerSkyUniform = gl.getUniformLocation(skyProg, "uSamplerSky");
//-----------------------water---------------------------------
for(var i=0; i<2; i++){
waterProg[i] = gl.createProgram();
gl.attachShader(waterProg[i], getShader(gl, "water-vs") );
gl.attachShader(waterProg[i], getShader(gl, "water-fs") );
gl.linkProgram(waterProg[i]);
if (!gl.getProgramParameter(waterProg[i], gl.LINK_STATUS)) {
alert("Could not initialize water shader.");
}
gl.useProgram(waterProg[i]);
waterProg[i].vertexPositionAttribute = gl.getAttribLocation(waterProg[i], "aVertexPosition");
waterProg[i].vertexNormalAttribute = gl.getAttribLocation(waterProg[i], "aVertexNormal");
//waterProg.textureCoordAttribute = gl.getAttribLocation(waterProg, "aTextureCoord");
waterProg[i].pMatrixUniform = gl.getUniformLocation(waterProg[i], "uPMatrix");
waterProg[i].mvMatrixUniform = gl.getUniformLocation(waterProg[i], "uMVMatrix");
waterProg[i].rmvMatrixUniform = gl.getUniformLocation(waterProg[i], "uReflectpMatrix");
waterProg[i].rpMatrixUniform = gl.getUniformLocation(waterProg[i], "uReflectmvMatrix");
waterProg[i].samplerSkyUniform = gl.getUniformLocation(waterProg[i], "uSamplerSky");
waterProg[i].samplerTileUniform = gl.getUniformLocation(waterProg[i], "uSamplerTile");
waterProg[i].samplerWaterUniform = gl.getUniformLocation(waterProg[i], "uSamplerWater");
waterProg[i].samplerCausticUniform = gl.getUniformLocation(waterProg[i], "uSamplerCaustic");
waterProg[i].samplerReflectUniform = gl.getUniformLocation(waterProg[i], "uSamplerReflect");
waterProg[i].eyePositionUniform = gl.getUniformLocation(waterProg[i],"uEyePosition");
waterProg[i].nmlMatrixUniform = gl.getUniformLocation(waterProg[i], "uNmlMatrix");
waterProg[i].progNumUniform = gl.getUniformLocation(waterProg[i], "uProgNum");
waterProg[i].sphereCenterUniform = gl.getUniformLocation(waterProg[i], "uSphereCenter");
waterProg[i].sphereRadiusUniform = gl.getUniformLocation(waterProg[i], "uSphereRadius");
waterProg[i].causticOnUniform = gl.getUniformLocation(waterProg[i], "uCausticOn");
waterProg[i].isSphereUniform = gl.getUniformLocation(waterProg[i], "uIsSphere");
waterProg[i].drawObjReflectUniform = gl.getUniformLocation(waterProg[i], "uDrawObjReflect");
}
//-----------------------height------------------------------------------------
heightProg = gl.createProgram();
gl.attachShader(heightProg, getShader(gl, "interact-vs") );
gl.attachShader(heightProg, getShader(gl, "interact-height-fs") );
gl.linkProgram(heightProg);
if (!gl.getProgramParameter(heightProg, gl.LINK_STATUS)) {
alert("Could not initialize height shader.");
}
gl.useProgram(heightProg);
heightProg.vertexPositionAttribute = gl.getAttribLocation(heightProg, "aVertexPosition");
heightProg.samplerWaterUniform = gl.getUniformLocation(heightProg, "uSamplerWater");
heightProg.centerUniform = gl.getUniformLocation(heightProg,"uCenter");
heightProg.radiusUniform = gl.getUniformLocation(heightProg,"uRadius");
heightProg.strengthUniform = gl.getUniformLocation(heightProg,"uStrength");
//-----------------------caustic------------------------------------------------
causticProg = gl.createProgram();
gl.attachShader(causticProg, getShader(gl, "caustic-vs") );
gl.attachShader(causticProg, getShader(gl, "caustic-fs") );
gl.linkProgram(causticProg);
if (!gl.getProgramParameter(causticProg, gl.LINK_STATUS)) {
alert("Could not initialize caustic shader.");
}
gl.useProgram(causticProg);
causticProg.samplerWaterUniform = gl.getUniformLocation(causticProg, "uSamplerWater");
causticProg.isSphereUniform = gl.getUniformLocation(causticProg, "uIsSphere");
causticProg.vertexPositionAttribute = gl.getAttribLocation(causticProg, "aVertexPosition");
causticProg.OESderivativesUniform = gl.getUniformLocation(causticProg,"OES_standard_derivatives");
causticProg.sphereRadiusUniform = gl.getUniformLocation(causticProg, "uSphereRadius");
causticProg.sphereCenterUniform = gl.getUniformLocation(causticProg, "uSphereCenter");
causticProg.lightMatrixUniform = gl.getUniformLocation(causticProg, "uLightMatrix");
causticProg.lightProjUniform = gl.getUniformLocation(causticProg, "uLightProj");
//-----------------------normal------------------------------------------------
normalProg = gl.createProgram();
gl.attachShader(normalProg, getShader(gl, "interact-vs") );
gl.attachShader(normalProg, getShader(gl, "interact-normal-fs") );
gl.linkProgram(normalProg);
if (!gl.getProgramParameter(normalProg, gl.LINK_STATUS)) {
alert("Could not initialize normal shader.");
}
gl.useProgram(normalProg);
normalProg.vertexPositionAttribute = gl.getAttribLocation(normalProg, "aVertexPosition");
normalProg.samplerWaterUniform = gl.getUniformLocation(normalProg, "uSamplerWater");
normalProg.deltaUniform = gl.getUniformLocation(normalProg,"uDelta");
//-----------------------simulation-----------------------------------------------
simulateProg = gl.createProgram();
gl.attachShader(simulateProg, getShader(gl, "interact-vs") );
gl.attachShader(simulateProg, getShader(gl, "interact-simulate-fs") );
gl.linkProgram(simulateProg);
if (!gl.getProgramParameter(simulateProg, gl.LINK_STATUS)) {
alert("Could not initialize simulate shader.");
}
gl.useProgram(simulateProg);
simulateProg.vertexPositionAttribute = gl.getAttribLocation(simulateProg, "aVertexPosition");
simulateProg.samplerWaterUniform = gl.getUniformLocation(simulateProg, "uSamplerWater");
simulateProg.deltaUniform = gl.getUniformLocation(simulateProg,"uDelta");
//---------------------sphere interaction---------------------------------------------------
objectProg = gl.createProgram();
gl.attachShader(objectProg, getShader(gl, "interact-vs") );
gl.attachShader(objectProg, getShader(gl, "interact-sphere-fs") );
gl.linkProgram(objectProg);
if (!gl.getProgramParameter(objectProg, gl.LINK_STATUS)) {
alert("Could not initialize interact shader.");
}
gl.useProgram(objectProg);
objectProg.vertexPositionAttribute = gl.getAttribLocation(objectProg, "aVertexPosition");
objectProg.samplerWaterUniform = gl.getUniformLocation(objectProg, "uSamplerWater");
objectProg.newCenterUniform = gl.getUniformLocation(objectProg, "uNewCenter");
objectProg.oldCenterUniform = gl.getUniformLocation(objectProg,"uOldCenter");
objectProg.radiusUniform = gl.getUniformLocation(objectProg,"uRadius");
//---------------------obj depth map---------------------------------------------------
depthProg = gl.createProgram();
gl.attachShader(depthProg, getShader(gl, "depth-vs") );
gl.attachShader(depthProg, getShader(gl, "depth-fs") );
gl.linkProgram(depthProg);
if (!gl.getProgramParameter(depthProg, gl.LINK_STATUS)) {
alert("Could not initialize depth shader.");
}
gl.useProgram(depthProg);
depthProg.vertexPositionAttribute = gl.getAttribLocation(depthProg, "aVertexPosition");
depthProg.vertexNormalAttribute = gl.getAttribLocation(depthProg, "aVertexNormal");
depthProg.pMatrixUniform = gl.getUniformLocation(depthProg, "uPMatrix");
depthProg.mvMatrixUniform = gl.getUniformLocation(depthProg, "uMVMatrix");
depthProg.centerUniform = gl.getUniformLocation(depthProg, "uCenter");
depthProg.modeUniform = gl.getUniformLocation(depthProg, "uMode");
//---------------------perlin noise for wind------------------------------------------------
windProg = gl.createProgram();
gl.attachShader(windProg, getShader(gl, "perlin-vs") );
gl.attachShader(windProg, getShader(gl, "perlin-fs") );
gl.linkProgram(windProg);
if (!gl.getProgramParameter(windProg, gl.LINK_STATUS)) {
alert("Could not initialize wind shader.");
}
gl.useProgram(windProg);
windProg.vertexPositionAttribute = gl.getAttribLocation(windProg, "aVertexPosition");
windProg.samplerWaterUniform = gl.getUniformLocation(windProg, "uSamplerWater");
windProg.samplerPermUniform = gl.getUniformLocation(windProg, "uSamplerPerm");
windProg.samplerGradUniform = gl.getUniformLocation(windProg, "uSamplerGrad");
windProg.timeUniform = gl.getUniformLocation(windProg, "uTime");
//---------------------particle for rain------------------------------------------------
rainProg = gl.createProgram();
gl.attachShader(rainProg, getShader(gl, "rain-vs") );
gl.attachShader(rainProg, getShader(gl, "rain-fs") );
gl.linkProgram(rainProg);
if (!gl.getProgramParameter(rainProg, gl.LINK_STATUS)) {
alert("Could not initialize rain shader.");
}
gl.useProgram(rainProg);
rainProg.vertexPositionAttribute = gl.getAttribLocation(rainProg, "aVertexPosition");
rainProg.pMatrixUniform = gl.getUniformLocation(rainProg, "uPMatrix");
rainProg.mvMatrixUniform = gl.getUniformLocation(rainProg, "uMVMatrix");
//----------------------quad debug shader----------------------------------------------
quadProg = gl.createProgram();
gl.attachShader(quadProg, getShader(gl, "quad-vs"));
gl.attachShader(quadProg, getShader(gl, "quad-fs"));
gl.linkProgram(quadProg);
if (!gl.getProgramParameter(quadProg, gl.LINK_STATUS)) {
alert("Could not initialize quad shader.");
}
gl.useProgram(quadProg);
quadProg.vertexPositionAttribute = gl.getAttribLocation(quadProg, "aVertexPosition");
quadProg.samplerDepthUniform = gl.getUniformLocation(quadProg, "uSamplerDepth");
quadProg.textureCoordAttribute = gl.getAttribLocation(quadProg, "aTextureCoord");
quadProg.modeUniform = gl.getUniformLocation(quadProg, "uMode");
//----------------------god rays----------------------------------------------
godrayProg = gl.createProgram();
gl.attachShader(godrayProg, getShader(gl, "godray-vs") );
gl.attachShader(godrayProg, getShader(gl, "godray-fs") );
gl.linkProgram(godrayProg);
if (!gl.getProgramParameter(godrayProg, gl.LINK_STATUS)) {
alert("Could not initialize godray shader.");
}
gl.useProgram(godrayProg);
godrayProg.vertexPositionAttribute = gl.getAttribLocation(godrayProg, "aVertexPosition");
godrayProg.textureCoordAttribute = gl.getAttribLocation(godrayProg, "aTexcoord");
godrayProg.mvMatrixUniform = gl.getUniformLocation(godrayProg, "uMVMatrix");
godrayProg.pMatrixUniform = gl.getUniformLocation(godrayProg, "uPMatrix");
godrayProg.lightMatrixUniform = gl.getUniformLocation(godrayProg, "uLightMatrix");
godrayProg.samplerInputUniform = gl.getUniformLocation(godrayProg, "uSamplerInput");
godrayProg.passUniform = gl.getUniformLocation(godrayProg, "uPass");
//----------------------obj reflection---------------------------------------------
reflectProg = gl.createProgram();
gl.attachShader(reflectProg, getShader(gl, "reflect-vs") );
gl.attachShader(reflectProg, getShader(gl, "reflect-fs") );
gl.linkProgram(reflectProg);
if (!gl.getProgramParameter(reflectProg, gl.LINK_STATUS)) {
alert("Could not initialize reflect shader.");
}
gl.useProgram(reflectProg);
reflectProg.vertexPositionAttribute = gl.getAttribLocation(reflectProg, "aVertexPosition");
//reflectProg.vertexNormalAttribute = gl.getAttribLocation(reflectProg, "aVertexNormal");
reflectProg.mvMatrixUniform = gl.getUniformLocation(reflectProg, "uMVMatrix");
reflectProg.pMatrixUniform = gl.getUniformLocation(reflectProg, "uPMatrix");
//--------------------post process------------------------------------------------
postProg = gl.createProgram();
gl.attachShader(postProg, getShader(gl, "quad-vs"));
gl.attachShader(postProg, getShader(gl, "postprocess-fs"));
gl.linkProgram(postProg);
if (!gl.getProgramParameter(postProg, gl.LINK_STATUS)) {
alert("Could not initialize quad shader.");
}
gl.useProgram(postProg);
postProg.vertexPositionAttribute = gl.getAttribLocation(postProg, "aVertexPosition");
postProg.samplerGodrayUniform = gl.getUniformLocation(postProg, "uSamplerGodray");
postProg.samplerColorUniform = gl.getUniformLocation(postProg, "uSamplerColor");
postProg.textureCoordAttribute = gl.getAttribLocation(postProg, "aTextureCoord");
// reflectProg.pMatrixUniform = gl.getUniformLocation(reflectProg, "uPMatrix");
// reflectProg.centerUniform = gl.getUniformLocation(reflectProg, "uCenter");
}
function checkCanDrawToTexture(texture){
framebuffer = framebuffer || gl.createFramebuffer();
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);
var result = gl.checkFramebufferStatus(gl.FRAMEBUFFER) == gl.FRAMEBUFFER_COMPLETE;
gl.bindFramebuffer(gl.FRAMEBUFFER, null);
return result;
}
function handleLoadedTexture(texture) {
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGB, gl.RGB, gl.UNSIGNED_BYTE, texture.image);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT );
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT);
//gl.generateMipmap(gl.TEXTURE_2D);
// gl.bindTexture(gl.TEXTURE_2D, null);
}
function initTexture(texture, url) {
console.log("loading texture: " + url);
texture.image = new Image();
texture.image.onload = function () {
handleLoadedTexture(texture)
}
texture.image.src = url;
}
function initCustomeTexture( texture, format, filter, type, width, height, data, wrapS, wrapT){
gl.bindTexture(gl.TEXTURE_2D, texture);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, 1);
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, filter );
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, filter );
wrapS = wrapS ||gl.CLAMP_TO_EDGE;
wrapT = wrapT ||gl.CLAMP_TO_EDGE;
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, wrapS );
gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, wrapT );
data = data||null;
if(type == gl.FLOAT){
if(OES_texture_float){
gl.texImage2D( gl.TEXTURE_2D, 0, format, width, height, 0, format, type, data);
}
else{
alert("OES_texture_float is not enabled.");
}
}
else{
gl.texImage2D( gl.TEXTURE_2D, 0, format, width, height, 0, format, type, data);
}
// gl.bindTexture(gl.TEXTURE_2D, null);
}
function initSkyBoxTexture() {
var ct = 0;
var img = new Array(6);
var urls = [
// "skybox/posx.jpg", "skybox/negx.jpg",
// "skybox/posy.jpg", "skybox/negy.jpg",
// "skybox/posz.jpg", "skybox/negz.jpg"
// "skybox/Sky2.jpg","skybox/Sky3.jpg",
// "skybox/Sky4.jpg","skybox/Sky5.jpg",
// "skybox/Sky0.jpg","skybox/Sky1.jpg"
"skybox/skyright.jpg","skybox/skyleft.jpg",
"skybox/skyup.jpg","skybox/skydown.jpg",
"skybox/skyback.jpg","skybox/skyfront.jpg"
];
for (var i = 0; i < 6; i++) {
img[i] = new Image();
img[i].onload = function() {
ct++;
if (ct == 6) { //upon finish loading tmp 6 images
sky.Texture = gl.createTexture();
gl.bindTexture(gl.TEXTURE_CUBE_MAP, sky.Texture);
var targets = [
gl.TEXTURE_CUBE_MAP_POSITIVE_X, gl.TEXTURE_CUBE_MAP_NEGATIVE_X,
gl.TEXTURE_CUBE_MAP_POSITIVE_Y, gl.TEXTURE_CUBE_MAP_NEGATIVE_Y,
gl.TEXTURE_CUBE_MAP_POSITIVE_Z, gl.TEXTURE_CUBE_MAP_NEGATIVE_Z ];
for (var j = 0; j < 6; j++) {
// console.log("bingding skybox texture: " + targets[j]);
gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, false);
gl.texImage2D(targets[j], 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img[j]);
gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_MAG_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_MIN_FILTER, gl.LINEAR);
gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE);
gl.texParameteri(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE);
}
gl.generateMipmap(gl.TEXTURE_CUBE_MAP);
}
}
// console.log("loading skybox texture: " + urls[i]);
img[i].src = urls[i];
}
}
function mvPushMatrix() {
var copy = mat4.create();
mat4.set(mvMatrix, copy);
mvMatrixStack.push(copy);
}
function mvPopMatrix() {
if (mvMatrixStack.length == 0) {
throw "Invalid popMatrix!";
}
mvMatrix = mvMatrixStack.pop();
}
function setMatrixUniforms(prog) {
gl.uniformMatrix4fv(prog.pMatrixUniform, false, pMatrix);
gl.uniformMatrix4fv(prog.mvMatrixUniform, false, mvMatrix);
}
function degToRad(degrees) {
return degrees * Math.PI / 180;
}
function initBuffers(model, primitive){
model.VBO = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, model.VBO);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(primitive.vertices), gl.STATIC_DRAW);
model.NBO = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, model.NBO);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(primitive.normals), gl.STATIC_DRAW);
model.TBO = gl.createBuffer();
gl.bindBuffer(gl.ARRAY_BUFFER, model.TBO);
gl.bufferData(gl.ARRAY_BUFFER, new Float32Array(primitive.texcoords), gl.STATIC_DRAW);
model.IBO = gl.createBuffer();
gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, model.IBO);
gl.bufferData(gl.ELEMENT_ARRAY_BUFFER, new Uint16Array(primitive.indices), gl.STATIC_DRAW);
model.IBO.numItems = primitive.numIndices;
}
function initObjs(){
//objRaw = loadObj("objs/suzanne.obj");
//objRaw = loadObj("objs/prism.obj");
//objRaw = loadObj("objs/apple.obj");
//objRaw = loadObj("objs/appleHighPoly.obj");
objRaw = loadObj("objs/duck.obj");
//objRaw = loadObj("objs/duckHighPoly.obj");
objRaw.addCallback(function () {
objModel = new createModel(gl, objRaw);
var tmp = {};
tmp.vertices = [];
tmp.indices = [];
tmp.normals = [];
tmp.texcoords = [];
for(var i=0; i<objRaw.numGroups(); i++){
for(var j=0; j<objRaw.vertices(i).length; j++){
tmp.vertices.push(objRaw.vertices(i)[j]);
}
}
for(var i=0; i<objRaw.numGroups(); i++){
for(var j=0; j<objRaw.indices(i).length; j++){
tmp.indices.push(objRaw.indices(i)[j]);
}
}
for(var i=0; i<objRaw.numGroups(); i++){
for(var j=0; j<objRaw.normals(i).length; j++){
tmp.normals.push(objRaw.normals(i)[j]);
}
}
for(var i=0; i<objRaw.numGroups(); i++){
for(var j=0; j<objRaw.texcoords(i).length; j++){
tmp.texcoords.push(objRaw.texcoords(i)[j]);
}
}
//tmp.numIndices = sum + cubePool.numIndices;
tmp.numIndices = tmp.indices.length;
initBuffers(depthModel, tmp);
// console.log("pool indices: " + cubePool.numIndices);
// console.log("obj indices: " + sum);
// console.log("depthModel indices: " + depthModel.IBO.numItems);
});
objRaw.executeCallBackFunc();
registerAsyncObj(gl, objRaw);
}
function handleMouseDown(event) {
if( event.button == 2 ) {
mouseLeftDown = false;
mouseRightDown = true;
}
else {
mouseLeftDown = true;
mouseRightDown = false;
startInteraction(event.clientX, event.clientY);
}
lastMouseX = event.clientX;
lastMouseY = event.clientY;
}
function handleMouseUp(event) {
mouseLeftDown = false;
mouseRightDown = false;
}
function handleMouseMove(event) {
if (!(mouseLeftDown || mouseRightDown)) {
return;
}
var newX = event.clientX;
var newY = event.clientY;
var deltaX = newX - lastMouseX;
var deltaY = newY - lastMouseY;
if( mouseLeftDown ) {
duringInterction(newX, newY);
//radius += 0.01 * deltaY;
//radius = Math.min(Math.max(radius, 2.0), 10.0);
}
else {
azimuth += 0.01 * deltaX;
elevation += 0.01 * deltaY;
elevation = Math.min(Math.max(elevation, -Math.PI/2+0.001), Math.PI/2-0.001);
}
eye = sphericalToCartesian(radius, azimuth, elevation);
view = mat4.create();
mat4.lookAt(eye, center, up, view);
lastMouseX = newX;
lastMouseY = newY;
}
function handleMouseWheel(event){
//console.log("scroll");
var move = event.wheelDelta/240;
if (move < 0 || pMatrix[14] > -2){
// pMatrix = mat4.translate(pMatrix, [0, 0, event.wheelDelta/240]);
}
if(fov+move< 90 && fov+move> 25){
fov += move;
}
return false; // Don't scroll the page
}
function startInteraction(x,y){
initTracer();
var ray = vec3.create();
ray = rayEyeToPixel(x,y);
var hit = vec3.create();
hit = rayIntersectSphere(tracer.eye, ray, sphere.center, sphere.radius);
if(hit!= null){ //sphere interaction
preHit = hit;
viewportNormal = rayEyeToPixel(gl.viewportWidth / 2.0, gl.viewportHeight / 2.0);
vec3.negate(viewportNormal);
mode = 1;
// console.log("--------------hit sphere at " + vec3.str(preHit));
// console.log("--------------viewportNormal="+vec3.str(viewportNormal));
}
else{ //mouse directioin interaction
var scale = -tracer.eye[1] / ray[1];
//move in the direction of ray, until gets the 'y=waterHeight' plane
var point = vec3.create([tracer.eye[0] + ray[0]*scale, tracer.eye[1] + ray[1]*scale, tracer.eye[2] + ray[2]*scale] );
if (Math.abs(point[0]) < 1 && Math.abs(point[2]) < 1) {
drawHeight(point[0],point[2]);
mode = 0;
}
}
}
function duringInterction(x,y){
var ray = vec3.create();
ray = rayEyeToPixel(x,y);
if(mode == 0){ //direct mouse interaction
var scale = -tracer.eye[1] / ray[1];
var point = vec3.create([tracer.eye[0] + ray[0]*scale, tracer.eye[1] + ray[1]*scale, tracer.eye[2] + ray[2]*scale] );
if (Math.abs(point[0]) < 1 && Math.abs(point[2]) < 1) {
drawHeight(point[0],point[2]);
}
}
//var hit = rayIntersectSphere(tracer.eye, ray, sphere.center, sphere.radius);
//if(hit!= null){ //sphere interaction, move sphere around
if(mode == 1){ //sphere interaction, move sphere around
var theEye = vec3.create(tracer.eye);
var preRay = vec3.create(preHit);
var nxtRay = vec3.create(ray);
vec3.subtract(preRay, theEye); //preRay = preHit - eye
var t1 = vec3.dot(viewportNormal, preRay);
var t2 = vec3.dot(viewportNormal, nxtRay);
var t = t1/t2;
vec3.scale(nxtRay, t);
// console.log("-----------------------");
// console.log("pre ray: " + vec3.str(preRay));
// console.log("nxt ray: " + vec3.str(nxtRay));
var nxtHit = vec3.create();
nxtHit = vec3.add(theEye, nxtRay);
var offsetHit = vec3.create(nxtHit);
vec3.subtract(offsetHit, preHit); //offsetHit = nxtHit - preHit
// console.log("pre hit: " + vec3.str(preHit));
// console.log("nxt hit: " + vec3.str(nxtHit));
// console.log("hit offset: " + vec3.str(offsetHit));
if(vec3.length(offsetHit)>0.0){ //change location
vec3.add(sphere.center, offsetHit);
//make sure the sphere is in the boundary of pool
sphere.center[0] = Math.max(sphere.radius - 1.0, Math.min(1.0 - sphere.radius, sphere.center[0]));
if(isSphere == 1){
sphere.center[1] = Math.max(sphere.radius - 0.65 - 0.3, Math.min(10, sphere.center[1]));
}else{
sphere.center[1] = Math.max(sphere.radius - 0.65 - 0.3 - 0.1, Math.min(10, sphere.center[1]));
}
sphere.center[2] = Math.max(sphere.radius - 1.0, Math.min(1.0 - sphere.radius, sphere.center[2]));
//console.log("drag center: " + vec3.str(sphere.center));
}
preHit = nxtHit;
}
}
function drawScene() {
gl.viewport(0, 0, gl.viewportWidth, gl.viewportHeight);
mat4.perspective(fov, gl.viewportWidth / gl.viewportHeight, 1.0, 40.0, pMatrix);
mat4.identity(mvMatrix);
mat4.multiply(mvMatrix,view);
mat4.inverse(mvMatrix,nmlMatrix);
mat4.transpose(nmlMatrix,nmlMatrix);
if(parameters.Caustic == true) u_CausticOnLocation = 1.0;
else u_CausticOnLocation = 0.0;
if(parameters.Object == "sphere") isSphere = 1;
else isSphere = 0;
if(isSphere == 1){
sphereRadius = parameters.Sphere_Radius;
sphereObj = createSphere(sphereRadius, 12, 12);
initBuffers(sphere, sphereObj);
sphere.radius = sphereObj.radius;
//initObjs();
}else{
sphere.radius = 0.23;
}
if(parameters.Pool_Pattern == "white brick" && currentPoolPattern != "white brick"){
initTexture(pool.Texture, "tile/tile3.jpg");
currentPoolPattern = "white brick";
}
if(parameters.Pool_Pattern == "marble" && currentPoolPattern != "marble") {
initTexture(pool.Texture, "tile/tile2.jpg");
currentPoolPattern = "marble";
}
if(parameters.Pool_Pattern == "blue tile" && currentPoolPattern != "blue tile"){
initTexture(pool.Texture, "tile/tile4.jpg");
currentPoolPattern = "blue tile";
}
if(parameters.Pool_Pattern == "golden tile" && currentPoolPattern != "golden tile"){
initTexture(pool.Texture, "tile/tile5.jpg");
currentPoolPattern = "golden tile";
}
// if(isSphere == 0){
var lightView = mat4.lookAt(lightInvDir, vec3.create([0,0,0]), vec3.create([0,1,0])); //from the point of view of the light
lightProj = mat4.ortho(-2,2,-2,2,-4,4); //axis-aligned box (-10,10),(-10,10),(-10,20) on the X,Y and Z axes
mat4.identity(lightMatrix);
mat4.multiply(lightMatrix, lightView);
drawDepth(colorTexture,depthTexture, lightMatrix, lightProj,depthModel, false); //depth from light
initTracer();
var ray = vec3.create();
var cam = vec3.create(tracer.eye);
//cam.z = - cam.z;
var inverseCenter = vec3.create(sphere.center);
if(sphere.center[1] > 0.0){
inverseCenter[1] = -inverseCenter[1];
}
ray = vec3.subtract(inverseCenter, cam);
vec3.normalize(ray);
var scale = -cam[1] / ray[1];
var point = vec3.create([cam[0] + ray[0]*scale, cam[1] + ray[1]*scale, cam[2] + ray[2]*scale] );
//var point = vec3.create([sphere.center[0], 0, sphere.center[2]]);
var upVector = vec3.create();
var forwardVector = vec3.create();
var rightVector = vec3.create();
forwardVector = vec3.subtract(vec3.create([0,0,0]), cam);
rightVector = vec3.cross(forwardVector, up);
reflectProj = mat4.ortho(-2,2,-2,2,-4,4);
var center = vec3.create(sphere.center);
forwardVector = vec3.subtract(center, point);
//upVector = vec3.cross(rightVector,forwardVector);
upVector = vec3.subtract(cam, point);
vec3.normalize(upVector);
// if (Math.abs(point[0]) < 1 && Math.abs(point[2]) < 1) { //water plane
var reflectView = mat4.lookAt(point, sphere.center, upVector); //[eye, center, up]
mat4.identity(reflectModelView);
mat4.multiply(reflectModelView, reflectView);
drawDepth(colorTexture3, depthTexture3, reflectModelView, reflectProj, depthModel, true, 1); //color from the point of reflections
// }
// }
if(isSphere == 1){
drawDepth(colorTexture2, depthTexture2, mvMatrix, pMatrix, sphere, false); //depth from camera
}