Hollow Flower

index.html

<script src = "https://rawgit.com/wolftype/200c/gh-pages/js/gfx.js"></script>

<script type="text/javascript">


var app = new GFX.App();
var box;

/// On Initialization of the WebGL Application (this happens once)
app.onInit = function(){

  // A CUBE! 
  // We include each vertex on the back side TWICE so that we can attach
  // TWO separate uv coordinates to each
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    //-1.0, -1.0, 1.0,  //bottom left front
    //-1.0, 1.0,  1.0,  //top left front
    //1.0,  1.0,  1.0,  //top right front
    //1.0,  -1.0, 1.0,  //bottom right front

    //-1.0, -1.0, -1.0, //bottom left back
    //-1.0, 1.0,  -1.0, //top left back
    //1.0,  1.0,  -1.0, //top right back
    //1.0,  -1.0, -1.0, //bottom right back

    //second copy of back side:
    //-1.0, -1.0, -1.0, //bottom left back II
    //-1.0, 1.0,  -1.0, //top left back II
    //1.0,  1.0,  -1.0, //top right back II
    //1.0,  -1.0, -1.0, //bottom right back II
   
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,0.6774861812591553,0.0
,0.6774861812591553,1.0
,0.6811837553977966,0.0
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,0.6848812699317932,0.0
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,0.8069000244140625,0.0
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,1.0,0.0
,1.0,1.0

    //uvs to attach to second copy of back face
    //for texturing top and bottom of cube:
  
  
    // 1.0, 0.0,
    // 1.0, 1.0,
    // 0.0, 1.0,
    // 0.0, 0.0,

  ]);  

  //Break Object Vertices Triangles
   var indices = new Uint16Array([
     // 1,0,3,2,1,3, //front
     // 2,3,7,6,2,7, //right
     // 6,7,4,5,6,4, //back
     // 5,4,1,1,4,0, //left
     // //use alternative uvs for top and bottom:
     // 9,1,2,10,9,2, //top
     // 0,8,11,3,0,11 //bottom
     4,0,2,3,1,4,
     4,6,7,5,4,12,
     14,15,13,4,14,
     16,17,15,4,22,
     24,25,23,4,24,
     26,27,25,4,26,
     28,29,27,4,28,30,
     31,29,4,30,32,33,
     31,4,32,34,35,33,
     4,38,40,41,39,4,
     4,42,43,41,4,42,
     44,45,43,4,44,46,
     47,45,4,48,50,51,
     49,4,50,52,53,51,
     4,52,54,55,53,4,
     54,56,57,55,4,58,
     60,61,59,4,60,62,
     63,61,4,62,64,65,
     63,4,64,66,67,65,
     4,66,68,69,67,4,
     68,70,71,69,4,70,
     72,73,71,4,72,74,
     75,73,4,78,80,81,
     79,4,80,82,83,81,
     4,86,88,89,87,4,
     88,90,91,89,4,92,
     94,95,93,4,94,96,
     97,95,4,96,98,99,
     97,4,98,100,101,99,
     4,100,102,103,101,4,
     102,104,105,103,4,104,
     106,107,105,4,106,108,
     109,107,4,108,110,111,
     109,4,110,112,113,111,
4,112,114,115,113,
4,114,116,117,115,
4,116,118,119,117,
4,122,124,125,123,
4,124,126,127,125,
4,126,128,129,127,
4,128,130,131,129,
4,130,132,133,131,
4,132,134,135,133,
4,136,138,139,137,
4,140,142,143,141,
4,142,144,145,143,
4,144,146,147,145,
4,148,150,151,149,
4,150,152,153,151,
4,154,156,157,155,
4,156,158,159,157,
4,158,160,161,159,
4,160,162,163,161,
4,162,164,165,163,
4,166,168,169,167,
4,168,170,171,169,
4,170,172,173,171,
4,174,176,177,175,
4,180,182,183,181,
4,182,184,185,183,
4,186,188,189,187,
4,192,194,195,193,
4,194,196,197,195,
4,196,198,199,197,
4,198,200,201,199,
4,200,202,203,201,
4,202,204,205,203,
4,204,206,207,205,
4,210,212,213,211,
4,212,214,215,213,
4,214,216,217,215,
4,216,218,219,217,
4,222,224,225,223,
4,224,226,227,225,
4,226,228,229,227,
4,228,230,231,229,
4,230,232,233,231,
4,232,234,235,233,
4,234,236,237,235,
4,236,238,239,237,
4,240,242,243,241,
4,242,244,245,243,
4,244,246,247,245,
4,246,248,249,247,
4,248,250,251,249,
4,250,252,253,251,
4,254,256,257,255,
4,258,260,261,259,
4,260,262,263,261,
4,262,264,265,263,
4,264,266,267,265,
4,266,268,269,267,
4,268,270,271,269,
4,270,272,273,271,
4,274,276,277,275,
3,2,4,3,
3,4,5,3,
3,6,8,7,
3,8,9,7,
3,8,10,9,
3,10,11,9,
3,10,12,11,
3,12,13,11,
3,16,18,17,
3,18,19,17,
3,18,20,19,
3,20,21,19,
3,20,22,21,
3,22,23,21,
3,34,36,35,
3,36,37,35,
3,36,38,37,
3,38,39,37,
3,46,48,47,
3,48,49,47,
3,56,58,57,
3,58,59,57,
3,74,76,75,
3,76,77,75,
3,76,78,77,
3,78,79,77,
3,82,84,83,
3,84,85,83,
3,84,86,85,
3,86,87,85,
3,90,92,91,
3,92,93,91,
3,118,120,119,
3,120,121,119,
3,120,122,121,
3,122,123,121,
3,134,136,135,
3,136,137,135,
3,138,140,139,
3,140,141,139,
3,146,148,147,
3,148,149,147,
3,152,154,153,
3,154,155,153,
3,164,166,165,
3,166,167,165,
3,172,174,173,
3,174,175,173,
3,176,178,177,
3,178,179,177,
3,178,180,179,
3,180,181,179,
3,184,186,185,
3,186,187,185,
3,188,190,189,
3,190,191,189,
3,190,192,191,
3,192,193,191,
3,206,208,207,
3,208,209,207,
3,208,210,209,
3,210,211,209,
3,218,220,219,
3,220,221,219,
3,220,222,221,
3,222,223,221,
3,238,240,239,
3,240,241,239,
3,252,254,253,
3,254,255,253,
3,256,258,257,
3,258,259,257,
3,272,274,273,
3,274,275,273,
3,276,278,277,
3,278,279,277,
  ]);


  //Create and Bind two new array buffers and a new element array buffer
  flower = new GFX.Mesh();

  //Allocate Some Data on the GPU and copy position data over
  flower.vertexBuffer.bind();
  flower.vertexBuffer.alloc( vertices.byteLength );
  flower.vertexBuffer.data(vertices);

  //Allocate Some Data on the GPU and copy tex data over
  flower.texBuffer.bind();
  flower.texBuffer.alloc( texCoord.byteLength );
  flower.texBuffer.data(texCoord);

  //Allocate Some Data on the GPU and copy index data over
  flower.indexBuffer.bind();
  flower.indexBuffer.alloc( indices.byteLength );
  flower.indexBuffer.data(indices);
}


// Render the scene
app.onRender = function() {

  var scene = this.scene;

  scene.color = [0.8,0.8,0.8,1.0];

  //rotate scene camera about y axis
   scene.camera.frame.rotateX( Math.sin( scene.time) * Math.PI /8.*2 );
    scene.camera.frame.rotateY( Math.cos( scene.time) * Math.PI / 8. );
     scene.camera.frame.rotateZ( Math.sin( scene.time) * Math.PI/4. );


  //begin scene render, send matrices over to shader uniform
  scene.begin();

    //Send Time Variable over to GPU
    scene.shader.setUniformFloat("u_time", scene.time )
 
    //enable attributes in shader
    scene.shader.enableAttribute( "position" );
    scene.shader.enableAttribute( "uv" );

    flower.frame.rotateX( scene.time );
    flower.frame.rotateY( Math.PI / 8. );

    //upload model matrix
    flower.uploadModel(scene.shader)

    //Bind Vertex Buffer
    flower.vertexBuffer.bind();
    //Point Buffer to Attribute in shader
    scene.shader.pointAttribute("position", 3);

    //Bind TexCoord Buffer
    flower.texBuffer.bind();
    //Point Buffer to Attribute in Shader
    scene.shader.pointAttribute("uv", 2)

    //Bind Index Buffer and Draw based on Indices
    flower.indexBuffer.bind();
    //Draw the indices
    flower.indexBuffer.drawElements(GL.TRIANGLES);

   //or just draw the vertex array buffer directly as points (can also use GL.LINES, GL.LINE_STRIP, GL.TRIANGLES, etc)
   //  box.vertexBuffer.bind();
   //  box.vertexBuffer.drawArrays(GL.POINTS);

  scene.end();
}

</script>

<!-- VERTEX SHADER -->
<script id="gfxvert" type="text/glsl">

  #ifdef GL_ES
  precision lowp float;
  #endif

  attribute vec3 position;      //Position
  attribute vec2 uv;            //Texture;


  uniform mat4 model;           //Model Matrix
  uniform mat4 view;            //View Matrix
  uniform mat4 projection;      //Projection Matrix

  varying vec2 vuv;             //Texture Coordiante to Output to Fragment Shader

  void main() {
    vuv = uv;
    gl_Position = projection * view * model * vec4(position, 1.0);
    gl_PointSize = 10.0;
  }
</script>


<!-- FRAGMENT SHADER -->
<script id="gfxfrag" type="text/glsl">

  #ifdef GL_ES
  precision lowp float;
  #endif

  uniform float u_time;

  varying vec2 vuv;

  void main() {
    vec2 st = vuv;
    st = fract(st*2.0);
    vec3 color = vec3(st.x * abs(sin(u_time))*3.14*3.14,
    sin(u_time), 
    st.y * abs(cos(u_time))*3.14*3.14);
    gl_FragColor = vec4(color,1.0);
  }
</script>

<body onload=app.start()>
<canvas id="gfxcanvas" width=640 height=480> No <code> canvas </code> tag support </canvas>

</body>
</html>