水底3D水母（http://chrysaora.com/）

最新推荐文章于 2022-07-26 14:36:15 发布
最新推荐文章于 2022-07-26 14:36:15 发布
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CC 4.0 BY-SA版权
分类专栏： WebGL 文章标签： float class input animation vector javascript
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/devehe/article/details/6896158
这是一个使用WebGL技术创建的交互式海洋生物模拟场景，包括水母、浮游生物等元素，通过复杂的顶点和片段着色器实现细腻的视觉效果。用户可以通过调试控制台调整光照、粒子数量及大小等参数。

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 <html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
 <title>Chrysaora - WebGL</title>
 <link href="css/style.css" rel="stylesheet" type="text/css">
 <script type="text/javascript" src="js/lib/jquery-1.4.2.min.js"></script>
 <script type="text/javascript" src="js/lib/mjs.js"></script>
  
 <script type="text/javascript" src="js/initWin.js"></script>
 <script type="text/javascript" src="js/initUI.js"></script>
 <script type="text/javascript" src="js/initUniforms.js"></script>
 <script type="text/javascript" src="js/initTextures.js"></script>
 <script type="text/javascript" src="js/initShaders.js"></script>
 <script type="text/javascript" src="js/initBuffers.js"></script>
  
 <script type="text/javascript" src="js/interact.js"></script>
 <script type="text/javascript" src="js/debug.js"></script>
  
 <script type="text/javascript" src="js/tick.js"></script>
 <script type="text/javascript" src="js/simulator.js"></script>
 <script type="text/javascript" src="js/drawSkybox.js"></script>
 <script type="text/javascript" src="js/drawJellyfish.js"></script>
 <script type="text/javascript" src="js/drawPlankton.js"></script>
 <script type="text/javascript" src="js/drawRays.js"></script>
 <script type="text/javascript" src="js/drawGrid.js"></script>
 <script type="text/javascript" src="js/drawScene.js"></script>
  
  
 <script type="text/javascript" src="js/imageCapture.js"></script>
 <script type="text/javascript" src="jsjpg/jpeg_encoder_basic.js"></script>
  
  
 <script id="skybox-vs" type="x-shader/x-vertex">
 attribute vec3 aVertexPosition;
 attribute vec3 aVertexNormal;
 attribute vec3 aVertexColor;
 attribute vec3 aTextureCoord;
 uniform mat4 uWorld;
 uniform mat4 uView;
 uniform mat4 uViewInv;
 uniform mat4 uWorldView;
 uniform mat4 uWorldViewProj;
 uniform mat4 uWorldInvTranspose;
  
 uniform float uNear;
 uniform float uFar;
 uniform vec3 uLightPos;
 uniform float uLightRadius;
 uniform vec4 uLightCol;
 uniform vec4 uLightSpecCol;
 uniform float uSpecPower;
 uniform vec4 uAmbientCol;
 uniform vec4 uFresnelCol;
 uniform float uFresnelPower;
 uniform float uFogDist;
 uniform vec4 uFogTopCol;
 uniform vec4 uFogBottomCol;
  
 uniform float uCurrentTime;
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
   vec3 pos = aVertexPosition;
  
 //matrices
   vWorld =               uWorld * vec4(pos, 1.0);
   vWorldView =           uWorldView * vec4(pos, 1.0);
   vWorldViewProj =       uWorldViewProj * vec4(pos, 1.0);
   vWorldInvTranspose =   uWorldInvTranspose * vec4(pos, 1.0);
   vViewInv =             uViewInv * vec4(pos, 1.0);
  
   //vertex eye vector
   vWorldEyeVec = normalize(vWorld.xyz - uViewInv[3].xyz);
  
   //vertex fog
   vDepth = (vWorldViewProj.z+uNear)/uFar;
   float height = smoothstep(uFogBottomCol.a, uFogTopCol.a, (vWorldEyeVec.y+1.0)/2.0);
   vFogCol = uFogTopCol*height + uFogBottomCol*(1.0-height);
   vFogCol.a = min(max((uFar-uNear)*vDepth/uFogDist,0.0),1.0);
  
 gl_Position = vWorldViewProj;
  
 }
 </script>
  
 <script id="skybox-fs" type="x-shader/x-fragment">
 #ifdef GL_ES
 precision highp float;
 #endif
  
 uniform sampler2D uSampler0;
 uniform sampler2D uSampler1;
 uniform sampler2D uSampler2;
 uniform sampler2D uSampler3;
  
  
 uniform float uShaderDebug;
 uniform float uCurrentTime;
 uniform float uNear;
 uniform float uFar;
 uniform float uAlpha;varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) { 
   vec4 composit = vec4(vFogCol.rgb, 1.0);
  
 vec4 finalColor = composit;
   finalColor.a *= uAlpha;
  
   gl_FragColor = finalColor;
 }
 </script><script id="jellyfish-vs" type="x-shader/x-vertex">
 attribute vec3 aVertexPosition;
 attribute vec3 aVertexNormal;
 attribute vec3 aVertexColor;
 attribute vec3 aTextureCoord;
 uniform mat4 uWorld;
 uniform mat4 uView;
 uniform mat4 uViewInv;
 uniform mat4 uWorldView;
 uniform mat4 uWorldViewProj;
 uniform mat4 uWorldInvTranspose;
  
 uniform float uNear;
 uniform float uFar;
 uniform vec3 uLightPos;
 uniform float uLightRadius;
 uniform vec4 uLightCol;
 uniform vec4 uLightSpecCol;
 uniform float uSpecPower;
 uniform vec4 uAmbientCol;
 uniform vec4 uFresnelCol;
 uniform float uFresnelPower;
 uniform float uFogDist;
 uniform vec4 uFogTopCol;
 uniform vec4 uFogBottomCol;
  
 uniform float uCurrentTime;
 uniform mat4 uJoint0;
 uniform mat4 uJoint1;
 uniform mat4 uJoint2;
 uniform mat4 uJoint3;
 uniform mat4 uJoint0InvTranspose;
 uniform mat4 uJoint1InvTranspose;
 uniform mat4 uJoint2InvTranspose;
 uniform mat4 uJoint3InvTranspose;
 uniform float uCurrentJellyfishTime;
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
  
   //Vertex Animation
   float dpi = 6.2831853;
   float pi = 3.14159265;
   float hpi = 1.570796325;
   float lenght = 1.50;
   float time = mod((uCurrentJellyfishTime+aVertexPosition.y*lenght), dpi);
   float time2 = mod((uCurrentJellyfishTime+aVertexPosition.y*lenght), dpi);
  
   if (time < hpi) time = time;
   else if (time < pi) time = hpi;
   else if (time < 3.0*hpi) time = (time*2.0-3.0*hpi);
  
   float offset = smoothstep(0.0,1.,max(0.,-aVertexPosition.y-0.8)/10.);
   vec3 anim = (vec3(aVertexColor.x,aVertexColor.y,aVertexColor.z)/8.0
   *sin((time+time2)/2.0) * (1.-offset));
   vec3 pos = aVertexPosition + anim;
   vec3 nrm = aVertexNormal + anim;
  
   //skinning
   float weight = -aVertexPosition.y/3.0;
   float w0 = max(min(-weight+1.0,1.0),0.0);
   float w1 = max(min(weight,-weight+2.0),0.0);
   float w2 = max(min(weight-1.0,-weight+3.0),0.0);
   float w3 = max(min(weight-2.0,1.0),0.0);
   pos = vec3(uJoint0 * vec4(pos, 1.0))*w0 +
 vec3(uJoint1 * vec4(pos, 1.0))*w1 +
 vec3(uJoint2 * vec4(pos, 1.0))*w2 +
 vec3(uJoint3 * vec4(pos, 1.0))*w3;
   nrm = vec3(uJoint0InvTranspose * vec4(nrm, 1.0))*w0 +
 vec3(uJoint1InvTranspose * vec4(nrm, 1.0))*w1 +
 vec3(uJoint2InvTranspose * vec4(nrm, 1.0))*w2 +
 vec3(uJoint3InvTranspose * vec4(nrm, 1.0))*w3;
  
   //matrices
   vWorld =               uWorld * vec4(pos, 1.0);
   vWorldView =           uWorldView * vec4(pos, 1.0);
   vWorldViewProj =       uWorldViewProj * vec4(pos, 1.0);
   vWorldInvTranspose =   uWorldInvTranspose * vec4(pos, 1.0);
   vViewInv =             uViewInv * vec4(pos, 1.0);
  
   //vertex normal
   vVertexNormal = normalize(nrm);
  
   //vertex eye vector
   vWorldEyeVec = normalize(vWorld.xyz - uViewInv[3].xyz);
  
   //diffuse
   vec3 lightDir = normalize(uLightPos - vWorld.xyz);
   float diffuseProduct = max(dot(normalize(vVertexNormal.xyz), lightDir), 0.0);
   float lightFalloff = pow(max(1.0-(distance(uLightPos, vWorld.xyz)/uLightRadius), 0.0),2.0);
   vDiffuse = uLightCol.rgb * vec3(diffuseProduct * lightFalloff * uLightCol.a);
  
   //specular
   vec3 lightReflectDir = reflect(lightDir, vVertexNormal);
   float specularProduct = pow(max(dot(lightReflectDir, vWorldEyeVec), 0.0), uSpecPower);
   vSpecular = uLightSpecCol.rgb * vec3(specularProduct * uLightSpecCol.a);
  
   //fresnel
   float fresnelProduct = pow(1.0-max(abs(dot(vVertexNormal, -vWorldEyeVec)), 0.0), uFresnelPower);
   vFresnel = uFresnelCol.rgb * vec3(uFresnelCol.a * fresnelProduct);
  
   //vertex fog
   vDepth = (vWorldViewProj.z+uNear)/uFar;
   float height = smoothstep(uFogBottomCol.a, uFogTopCol.a, (vWorldEyeVec.y+1.0)/2.0);
   vFogCol = uFogTopCol*height + uFogBottomCol*(1.0-height);
   vFogCol.a = min(max((uFar-uNear)*vDepth/uFogDist,0.0),1.0);
  
 //texture coords
   vTextureCoord = aTextureCoord;
  
   //ambient color
   vAmbient = uAmbientCol.rgb * uAmbientCol.a;
  
   gl_Position = vWorldViewProj;
 }
 </script>
  
 <script id="jellyfish-fs" type="x-shader/x-fragment">
 #ifdef GL_ES
 precision highp float;
 #endif
  
 uniform sampler2D uSampler0;
 uniform sampler2D uSampler1;
 uniform sampler2D uSampler2;
 uniform sampler2D uSampler3;
  
  
 uniform float uShaderDebug;
 uniform float uCurrentTime;
 uniform float uNear;
 uniform float uFar;
 uniform float uAlpha;uniform float uCurrentJellyfishTime;
 uniform vec4 uLightCol;
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
   vec3 caustics = texture2D(uSampler1, vec2((vWorld.x)/24., (vWorld.z-vWorld.y)/48.)).rgb;
   vec3 colorMap = texture2D(uSampler0, vec2(vTextureCoord.s, vTextureCoord.t)).rgb;
   float alphaMap = 1.0-texture2D(uSampler2, vec2(vTextureCoord.s, vTextureCoord.t)).r;
  
   caustics *= vDiffuse*2.0;
  
   vec4 composit = vec4(((vAmbient + vDiffuse + caustics)*colorMap.rgb) + vFresnel + vSpecular*alphaMap, alphaMap*0.9); 
  
   composit = vec4(composit.rgb, composit.a*0.8);//add bioluminescence
  
   composit.rgb = mix(composit.rgb, vFogCol.rgb, vFogCol.a);//mix with fog
  
   vec4 finalColor = composit;
  
   if (uShaderDebug == 0.0) {finalColor = vec4(composit); finalColor.a *= uAlpha;}//diffuse
   else if (uShaderDebug == 1.0) {finalColor = vec4(vDiffuse,1.0);}//diffuse
   else if (uShaderDebug == 2.0) {finalColor = vec4(vAmbient,1.0);}//ambient
   else if (uShaderDebug == 3.0) {finalColor = vec4(caustics.rgb,1.0);}//caustics
   else if (uShaderDebug == 4.0) {finalColor = vec4(colorMap.rgb,1.0);}//color
   else if (uShaderDebug == 5.0) {finalColor = vec4(vSpecular,1.0);}//specular
   else if (uShaderDebug == 6.0) {finalColor = vec4(vFresnel,1.0);}//fresnel
   else if (uShaderDebug == 7.0) {finalColor = vec4(vVertexNormal.xyz,1.0);}//normal
   else if (uShaderDebug == 8.0) {finalColor = vec4(vec3(alphaMap),1.0);}//transparency
   else if (uShaderDebug == 9.0) {finalColor = vec4(vec3(0.,1.,0.),1.0);}//chroma
 else if (uShaderDebug == 10.0) {finalColor = vec4(vec3(1.,1.,1.),alphaMap);}//wireframe
  
   gl_FragColor = finalColor;
 }
 </script><script id="vcolor-vs" type="x-shader/x-vertex">
 attribute vec3 aVertexPosition;
 attribute vec3 aVertexNormal;
 attribute vec3 aVertexColor;
 attribute vec3 aTextureCoord;
 uniform mat4 uWorld;
 uniform mat4 uView;
 uniform mat4 uViewInv;
 uniform mat4 uWorldView;
 uniform mat4 uWorldViewProj;
 uniform mat4 uWorldInvTranspose;
  
 uniform float uNear;
 uniform float uFar;
 uniform vec3 uLightPos;
 uniform float uLightRadius;
 uniform vec4 uLightCol;
 uniform vec4 uLightSpecCol;
 uniform float uSpecPower;
 uniform vec4 uAmbientCol;
 uniform vec4 uFresnelCol;
 uniform float uFresnelPower;
 uniform float uFogDist;
 uniform vec4 uFogTopCol;
 uniform vec4 uFogBottomCol;
  
 uniform float uCurrentTime;
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
   vec3 pos = aVertexPosition;
  
 //matrices
   vWorld =               uWorld * vec4(pos, 1.0);
   vWorldView =           uWorldView * vec4(pos, 1.0);
   vWorldViewProj =       uWorldViewProj * vec4(pos, 1.0);
   vWorldInvTranspose =   uWorldInvTranspose * vec4(pos, 1.0);
   vViewInv =             uViewInv * vec4(pos, 1.0);
  
   //vertex eye vector
   vWorldEyeVec = normalize(vWorld.xyz - uViewInv[3].xyz);
  
   //vertex fog
   vDepth = (vWorldViewProj.z+uNear)/uFar;
   float height = smoothstep(uFogBottomCol.a, uFogTopCol.a, (vWorldEyeVec.y+1.0)/2.0);
   vFogCol = uFogTopCol*height + uFogBottomCol*(1.0-height);
   vFogCol.a = min(max((uFar-uNear)*vDepth/uFogDist,0.0),1.0);
  
   //vertex color
 vColor = aVertexColor;
  
 gl_Position = vWorldViewProj;
 }
 </script>
  
 <script id="vcolor-fs" type="x-shader/x-fragment">
 #ifdef GL_ES
 precision highp float;
 #endif
  
 uniform sampler2D uSampler0;
 uniform sampler2D uSampler1;
 uniform sampler2D uSampler2;
 uniform sampler2D uSampler3;
  
  
 uniform float uShaderDebug;
 uniform float uCurrentTime;
 uniform float uNear;
 uniform float uFar;
 uniform float uAlpha; 
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
   vec4 composit = vec4(vColor, 1.0);
  
 //mix with fog
 composit.rgb = mix(composit.rgb, vFogCol.rgb, vFogCol.a);
  
 vec4 finalColor = composit;
  
   gl_FragColor = finalColor;
 }
 </script><script id="wire-vs" type="x-shader/x-vertex">
 attribute vec3 aVertexPosition;
 attribute vec3 aVertexNormal;
 attribute vec3 aVertexColor;
 attribute vec3 aTextureCoord;
 uniform mat4 uWorld;
 uniform mat4 uView;
 uniform mat4 uViewInv;
 uniform mat4 uWorldView;
 uniform mat4 uWorldViewProj;
 uniform mat4 uWorldInvTranspose;
  
 uniform float uNear;
 uniform float uFar;
 uniform vec3 uLightPos;
 uniform float uLightRadius;
 uniform vec4 uLightCol;
 uniform vec4 uLightSpecCol;
 uniform float uSpecPower;
 uniform vec4 uAmbientCol;
 uniform vec4 uFresnelCol;
 uniform float uFresnelPower;
 uniform float uFogDist;
 uniform vec4 uFogTopCol;
 uniform vec4 uFogBottomCol;
  
 uniform float uCurrentTime;
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
   vec3 pos = aVertexPosition;
  
 //matrices
   vWorld =               uWorld * vec4(pos, 1.0);
   vWorldView =           uWorldView * vec4(pos, 1.0);
   vWorldViewProj =       uWorldViewProj * vec4(pos, 1.0);
   vWorldInvTranspose =   uWorldInvTranspose * vec4(pos, 1.0);
   vViewInv =             uViewInv * vec4(pos, 1.0);
  
   //vertex eye vector
   vWorldEyeVec = normalize(vWorld.xyz - uViewInv[3].xyz);
  
   //vertex fog
   vDepth = (vWorldViewProj.z+uNear)/uFar;
   float height = smoothstep(uFogBottomCol.a, uFogTopCol.a, (vWorldEyeVec.y+1.0)/2.0);
   vFogCol = uFogTopCol*height + uFogBottomCol*(1.0-height);
   vFogCol.a = min(max((uFar-uNear)*vDepth/uFogDist,0.0),1.0);
  
 //vertex color
   vColor = aVertexColor;
  
 gl_Position = vWorldViewProj;
 }
 </script>
  
 <script id="wire-fs" type="x-shader/x-fragment">
 #ifdef GL_ES
 precision highp float;
 #endif
  
 uniform sampler2D uSampler0;
 uniform sampler2D uSampler1;
 uniform sampler2D uSampler2;
 uniform sampler2D uSampler3;
  
  
 uniform float uShaderDebug;
 uniform float uCurrentTime;
 uniform float uNear;
 uniform float uFar;
 uniform float uAlpha; 
 varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
  
 void main(void) {
   vec4 composit = vec4(vColor.rgb,1.0);
  
 //mix with fog
   composit.rgb = mix(composit.rgb, vFogCol.rgb, vFogCol.a);
  
 vec4 finalColor = composit;
  
   gl_FragColor = finalColor;
 }
 </script><script id="plankton-vs" type="x-shader/x-vertex">
 attribute vec3 aVertexPosition;
 attribute vec3 aVertexNormal;
 attribute vec3 aVertexColor;
 attribute vec3 aTextureCoord;
 uniform mat4 uWorld;
 uniform mat4 uView;
 uniform mat4 uViewInv;
 uniform mat4 uWorldView;
 uniform mat4 uWorldViewProj;
 uniform mat4 uWorldInvTranspose;
  
 uniform float uNear;
 uniform float uFar;
 uniform vec3 uLightPos;
 uniform float uLightRadius;
 uniform vec4 uLightCol;
 uniform vec4 uLightSpecCol;
 uniform float uSpecPower;
 uniform vec4 uAmbientCol;
 uniform vec4 uFresnelCol;
 uniform float uFresnelPower;
 uniform float uFogDist;
 uniform vec4 uFogTopCol;
 uniform vec4 uFogBottomCol;
  
 uniform float uCurrentTime;
 uniform vec3 uParticlePosition;
 uniform vec3 uParticleScale;
 uniform vec3 uPBbox;
 uniform mat4 uParticleMatrix;
 uniform float uPID;
 uniform float uPAlpha;
 uniform float uRAlpha;varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
 varying float pFade;
  
 void main(void) {
   //Vertex Animation
   vec3 pos = aVertexPosition;
  
   float rotationSpeed = uCurrentTime*sin(uPID);
   mat4 rotation = mat4(
         vec4( cos(rotationSpeed),  sin(rotationSpeed),  0.0,  0.0),
         vec4(-sin(rotationSpeed),  cos(rotationSpeed),  0.0,  0.0),
         vec4(0.0,   0.0,  1.0,  0.0),
     vec4(0.0,   0.0,  0.0,  1.0)
   ); 
  
   pos = vec3(uParticleMatrix * rotation * vec4(aVertexPosition, 1.0)) * uParticleScale + uParticlePosition;
  
 //matrices
   vWorld =               uWorld * vec4(pos, 1.0);
   vWorldView =           uWorldView * vec4(pos, 1.0);
   vWorldViewProj =       uWorldViewProj * vec4(pos, 1.0);
   vWorldInvTranspose =   uWorldInvTranspose * vec4(pos, 1.0);
   vViewInv =             uViewInv * vec4(pos, 1.0);
  
   //vertex normal
   vVertexNormal = normalize((uWorldInvTranspose * vec4(aVertexNormal, 1.)).xyz);
  
   //vertex eye vector
   vWorldEyeVec = normalize(vWorld.xyz - uViewInv[3].xyz);
  
   //diffuse light
 vec3 lightDir = normalize(uLightPos - vWorld.xyz);
   float diffuseProduct = max(dot(normalize(vVertexNormal.xyz), lightDir), 0.0);
   float lightFalloff = pow(max(1.0-(distance(uLightPos, vWorld.xyz)/uLightRadius), 0.0),2.0);
   vDiffuse = uLightCol.rgb * vec3(diffuseProduct * lightFalloff * uLightCol.a);
  
   //particle fade to bounding box
   pFade = min(1.0,uPBbox[0]-abs(uParticlePosition[0]));
   pFade *= min(1.0,uPBbox[1]-abs(uParticlePosition[1]));
   pFade *= min(1.0,uPBbox[2]-abs(uParticlePosition[2]));
  
   //vertex fog
   vDepth = (vWorldViewProj.z+uNear)/uFar;
   float height = smoothstep(uFogBottomCol.a, uFogTopCol.a, (vWorldEyeVec.y+1.0)/2.0);
   vFogCol = uFogTopCol*height + uFogBottomCol*(1.0-height);
   vFogCol.a = min(max((uFar-uNear)*vDepth/uFogDist,0.0),1.0);
  
 //texture coords
   vTextureCoord = aTextureCoord;
  
   //vertex color
   vColor = aVertexColor;
  
   //ambient color
   vAmbient = uAmbientCol.rgb * uAmbientCol.a;
  
 gl_Position = vWorldViewProj;
 }
 </script>
  
 <script id="plankton-fs" type="x-shader/x-fragment">
 #ifdef GL_ES
 precision highp float;
 #endif
  
 uniform sampler2D uSampler0;
 uniform sampler2D uSampler1;
 uniform sampler2D uSampler2;
 uniform sampler2D uSampler3;
  
  
 uniform float uShaderDebug;
 uniform float uCurrentTime;
 uniform float uNear;
 uniform float uFar;
 uniform float uAlpha; 
 uniform vec3 uParticlePosition;
 uniform vec3 uParticleScale;
 uniform vec3 uPBbox;
 uniform mat4 uParticleMatrix;
 uniform float uPID;
 uniform float uPAlpha;
 uniform float uRAlpha;varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
 varying float pFade;
  
 void main(void) {
   vec4 composit = vec4(1.0,1.0,1.0,1.0);
  
 //color and transpatency
     vec3 caustics = texture2D(uSampler1, vec2((vWorld.x)/24.+uCurrentTime/20., (vWorld.z-vWorld.y)/48.+uCurrentTime/40.)).rgb;
     vec4 colorMap = texture2D(uSampler0, vec2((vTextureCoord.s+uPID)*.25, (vTextureCoord.t+floor(uPID*.25))*.25));
     float transparency = colorMap.r * caustics.r * pFade * uPAlpha;
  
 //mix with fog additive
 composit = vec4((vAmbient + vDiffuse + caustics)*colorMap.rgb, transparency*(1.0-vFogCol.a));
  
 vec4 finalColor = composit;
  
   finalColor.a *= uAlpha;
   if (uShaderDebug == 9.0) {finalColor = vec4(vec3(0.,1.,0.)*finalColor.a*100.,1.0);}//chroma
  
   gl_FragColor = finalColor;
 }
 </script><script id="ray-vs" type="x-shader/x-vertex">
 attribute vec3 aVertexPosition;
 attribute vec3 aVertexNormal;
 attribute vec3 aVertexColor;
 attribute vec3 aTextureCoord;
 uniform mat4 uWorld;
 uniform mat4 uView;
 uniform mat4 uViewInv;
 uniform mat4 uWorldView;
 uniform mat4 uWorldViewProj;
 uniform mat4 uWorldInvTranspose;
  
 uniform float uNear;
 uniform float uFar;
 uniform vec3 uLightPos;
 uniform float uLightRadius;
 uniform vec4 uLightCol;
 uniform vec4 uLightSpecCol;
 uniform float uSpecPower;
 uniform vec4 uAmbientCol;
 uniform vec4 uFresnelCol;
 uniform float uFresnelPower;
 uniform float uFogDist;
 uniform vec4 uFogTopCol;
 uniform vec4 uFogBottomCol;
  
 uniform float uCurrentTime;
 uniform vec3 uParticlePosition;
 uniform vec3 uParticleScale;
 uniform vec3 uPBbox;
 uniform mat4 uParticleMatrix;
 uniform float uPID;
 uniform float uPAlpha;
 uniform float uRAlpha;varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
 varying float pFade;
  
 void main(void) {
  
   //Vertex Animation
   vec3 pos = vec3(uParticleMatrix * vec4(aVertexPosition, 1.0)) + uParticlePosition;
  
 //matrices
   vWorld =               uWorld * vec4(pos, 1.0);
   vWorldView =           uWorldView * vec4(pos, 1.0);
   vWorldViewProj =       uWorldViewProj * vec4(pos, 1.0);
   vWorldInvTranspose =   uWorldInvTranspose * vec4(pos, 1.0);
   vViewInv =             uViewInv * vec4(pos, 1.0);
  
   //vertex eye vector
   vWorldEyeVec = normalize(vWorld.xyz - uViewInv[3].xyz);
  
   //particle fade to bounding box edges
   pFade = min(1.0,3.0*uPBbox[0]-abs(uParticlePosition[0]));
   pFade *= min(1.0,3.0*uPBbox[2]-abs(uParticlePosition[2]));
  
   //vertex fog
   vDepth = (vWorldViewProj.z+uNear)/uFar;
   float height = smoothstep(uFogBottomCol.a, uFogTopCol.a, (vWorldEyeVec.y+1.0)/2.0);
   vFogCol = uFogTopCol*height + uFogBottomCol*(1.0-height);
   vFogCol.a = min(max((uFar-uNear)*vDepth/uFogDist,0.0),1.0);
  
 //texture coords
   vTextureCoord = aTextureCoord;
  
   //vertex color
   vColor = aVertexColor;
  
 gl_Position = vWorldViewProj;
 }
 </script>
  
 <script id="ray-fs" type="x-shader/x-fragment">
 #ifdef GL_ES
 precision highp float;
 #endif
  
 uniform sampler2D uSampler0;
 uniform sampler2D uSampler1;
 uniform sampler2D uSampler2;
 uniform sampler2D uSampler3;
  
  
 uniform float uShaderDebug;
 uniform float uCurrentTime;
 uniform float uNear;
 uniform float uFar;
 uniform float uAlpha; 
 uniform vec3 uParticlePosition;
 uniform vec3 uParticleScale;
 uniform vec3 uPBbox;
 uniform mat4 uParticleMatrix;
 uniform float uPID;
 uniform float uPAlpha;
 uniform float uRAlpha;varying vec3 vWorldEyeVec;
 varying vec4 vWorld;
 varying vec4 vWorldView;
 varying vec4 vWorldViewProj;
 varying vec4 vWorldInvTranspose;
 varying vec4 vViewInv;
 varying vec3 vTextureCoord;
 varying vec3 vVertexNormal;
 varying vec3 vColor;
 varying vec3 vSpecular;
 varying vec3 vDiffuse;
 varying vec3 vAmbient;
 varying vec3 vFresnel;
 varying float vDepth;
 varying vec4 vFogCol;
  
 varying float pFade;
  
 void main(void) {
   vec4 composit = vec4(1.0,1.0,1.0,1.0);
  
 //color and transpatency
 float colorMap = texture2D(uSampler0, vec2(vTextureCoord.s, vTextureCoord.t)).r;
   float transparency = colorMap * pFade * uRAlpha *.05;
  
 //mix with fog additive
 composit = vec4(vec3(vFogCol.rgb)*2.0, transparency*(1.0-vFogCol.a));
  
 vec4 finalColor = composit;
   finalColor.a *= uAlpha;
  
   gl_FragColor = finalColor;
 }
 </script>
 <script type="text/javascript">
 $(document).ready(function(){
   webGLStart();
 });
 </script>
  
 </head>
 <body>
     <div id="statusBar">
         Time: <span id="current-time"></span> | Frame rate: <span id="frameRate">NaN</span> | debug console: <a href="javascript:toggleConsole()"><b>[+]</b> | stop: <a href="javascript:stop()"><b>[+]</b> | reset: <a href="javascript:resetCanvas()"><b>[+]</b></a>
     </div>
     <div id="console">
         <div class="console-field" id="debugCamera">
             <b>camera</b>
             near <input type="text" class="textboxDebug" id="near">
             far <input type="text" class="textboxDebug" id="far">
             fov <input type="text" class="textboxDebug" id="fov"><br />
        </div>
        <div class="console-field" id="debugShader">
           <b>shader debug</b>
             <input type="radio" name="shaderDebug" value="0"> composit <br/>
             <input type="radio" name="shaderDebug" value="1"> diffuse <br/>
             <input type="radio" name="shaderDebug" value="2"> ambient<br/>
             <input type="radio" name="shaderDebug" value="3"> caustics <br/>
             <input type="radio" name="shaderDebug" value="4"> color <br/>
             <input type="radio" name="shaderDebug" value="5"> specular <br/>
             <input type="radio" name="shaderDebug" value="6"> fresnel <br/>
             <input type="radio" name="shaderDebug" value="7"> normal <br/>
             <input type="radio" name="shaderDebug" value="8"> alpha <br/>
             <input type="radio" name="shaderDebug" value="9"> key <br/>
             <input type="radio" name="shaderDebug" value="10"> wireframe <br/>
         </div>
        <div class="console-field" id="debugModel">
           <b>model debug</b>
             <input type="checkbox" name="showJellyfish" value="1"> show jellyfish </br>
             <input type="checkbox" name="showSkeleton" value="1"> show skeleton </br>
             <input type="checkbox" name="showTargets" value="1"> show targets </br>
             <input type="checkbox" name="showParticles" value="1"> show particles </br>
             <input type="checkbox" name="showRays" value="1"> show rays </br>
             <input type="checkbox" name="showGrid" value="1"> show grid </br>
             <input type="checkbox" name="showSkybox" value="1"> show skybox </br>
         </div>
        <div class="console-field" id="debugJellyfish">
           <b>jellyfish debug</b>
             <span class="input-section">count</span>
             <input type="text" class="textboxDebug" id="jCount" /><br />
             <span class="input-section">size</span>
             <input type="text" class="textboxDebug" id="jScale" />
             <input type="text" class="textboxDebug" id="jScaleRandom"  /><br />
             <span class="input-section">Turbulence</span>
             <input type="text" class="textboxDebug" id="jTurb" /><br />
             <span class="input-section">speed</span>
             <input type="text" class="textboxDebug" id="jSpeed" /><br />
         </div>
        <div class="console-field"  id="debugParticle">
           <b>particle debug</b>
             <span class="input-section">count</span>
             <input type="text" class="textboxDebug" id="pCount" /><br />
             <span class="input-section">bbox</span>
             <input type="text" class="textboxDebug" id="pBboxX" />
             <input type="text" class="textboxDebug" id="pBboxY" />
             <input type="text" class="textboxDebug" id="pBboxZ" /><br />
             <span class="input-section">flow</span>
             <input type="text" class="textboxDebug" id="pFlowX" />
             <input type="text" class="textboxDebug" id="pFlowY" />
             <input type="text" class="textboxDebug" id="pFlowZ" /><br />
             <span class="input-section">turbulence</span>
             <input type="text" class="textboxDebug" id="pTurbAmp" />
             <input type="text" class="textboxDebug" id="pTurbFreq" /><br />
             <span class="input-section">size</span>
             <input type="text" class="textboxDebug" id="pScale" />
             <input type="text" class="textboxDebug" id="pScaleRandom" /><br />
             <span class="input-section">alpha</span>
             <input type="text" class="textboxDebug" id="pAlpha" />
         </div>
        <div class="console-field"  id="debugParticle">
           <b>ray debug</b>
             <span class="input-section">ray count</span>
             <input type="text" class="textboxDebug" id="rCount" /><br />
             <span class="input-section">ray speed</span>
             <input type="text" class="textboxDebug" id="rSpeed" /><br />
             <span class="input-section">alpha</span>
             <input type="text" class="textboxDebug" id="rAlpha" /><br />
         </div>
         <div class="console-field" id="debugLighting">
           <b>Directional light</b>
             <span class="input-section">position</span>
             <input type="text" class="textboxDebug" id="lightX" />
             <input type="text" class="textboxDebug" id="lightY" />
             <input type="text" class="textboxDebug" id="lightZ" /><br />
             <span class="input-section">color</span>
             <input type="text" class="textboxDebug" id="lightR" />
             <input type="text" class="textboxDebug" id="lightG" />
             <input type="text" class="textboxDebug" id="lightB" />
             <input type="text" class="textboxDebug" id="lightA" /><br />
             <span class="input-section">spec color</span>
             <input type="text" class="textboxDebug" id="lightSpecR" />
             <input type="text" class="textboxDebug" id="lightSpecG" />
             <input type="text" class="textboxDebug" id="lightSpecB" />
             <input type="text" class="textboxDebug" id="lightSpecA" /><br />
             <span class="input-section">radius</span>
             <input type="text" class="textboxDebug" id="lightRadius" /><br />
             <span class="input-section">spec power</span>
             <input type="text" class="textboxDebug" id="lightSpecPower" /><br />
           <b>Ambient light</b>
             <span class="input-section">color</span>
             <input type="text"  class="textboxDebug" id="ambientR" />
             <input type="text"  class="textboxDebug" id="ambientG" />
             <input type="text"  class="textboxDebug" id="ambientB" />
             <input type="text"  class="textboxDebug" id="ambientA" />
           <b>fog</b>
             <span class="input-section">fogTop</span>
             <input type="text"  class="textboxDebug" id="fogTopR" />
             <input type="text"  class="textboxDebug" id="fogTopG" />
             <input type="text"  class="textboxDebug" id="fogTopB" />
             <input type="text"  class="textboxDebug" id="fogTopA" /></br>
             <span class="input-section">fogBottom</span>
             <input type="text"  class="textboxDebug" id="fogBottomR" />
             <input type="text"  class="textboxDebug" id="fogBottomG" />
             <input type="text"  class="textboxDebug" id="fogBottomB" />
             <input type="text"  class="textboxDebug" id="fogBottomA" /></br>
             <span class="input-section">fogDistance</span>
             <input type="text"  class="textboxDebug" id="fogDist" />
           <b>fresnel</b>
             <span class="input-section">color</span>
             <input type="text"  class="textboxDebug" id="fresnelR" />
             <input type="text"  class="textboxDebug" id="fresnelG" />
             <input type="text"  class="textboxDebug" id="fresnelB" />
             <input type="text"  class="textboxDebug" id="fresnelA" /><br/>
             <span class="input-section">power</span>
             <input type="text"  class="textboxDebug" id="fresnelPower" />
           <b>animation</b>
             <span class="input-section">lightBlendVector</span>
             <input type="text"  class="textboxDebug" id="lightBlendX" />
             <input type="text"  class="textboxDebug" id="lightBlendY" />
         </div>
     </div>
     <canvas id="webgl-canvas"></canvas>
 <script type="text/javascript">
  
   var _gaq = _gaq || [];
   _gaq.push(['_setAccount', 'UA-258449-47']);
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