description of shadermaterial

definition.js

/*global THREE:true requestAnimationFrame:true shaders:true*/

var shaders = {
    splat:{
        defines : {"USE_DIFFUSE2" : true},
        uniforms:{
            "alpha1" : { type: "t", value: null },
            
            "diffuse1" : { type: "t", value: null },
            "multiplier1" : {type: "f", value: 16.0 },
            "offset1" : {type: "f", value: 0.5 },
            
            "diffuse2" : { type: "t", value: null, defined: "USE_DIFFUSE2"},
            "multiplier2" : {type: "f", value: 1.0, defined: "USE_DIFFUSE2" },
            "offset2" : {type: "f", value: 0, defined: "USE_DIFFUSE2"}
            
        },
        vertexShader:[
            "varying vec2 vUv;",
            "",
            "void main() {",
            "  ",
            "  vUv = uv;",
            "  vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
            "  gl_Position = projectionMatrix * mvPosition;",
            "  ",
            "}"
        ].join("\n"),
        fragmentShader:[
            "uniform sampler2D alpha1;",
            
            "uniform sampler2D diffuse1;",
            "uniform float multiplier1;",
            "uniform float offset1;",
            
            "#ifdef USE_DIFFUSE2",

            "  uniform sampler2D diffuse2;",
            "  uniform float multiplier2;",
            "  uniform float offset2;",
            "#endif",
            
            "varying vec2 vUv;",
            "",
            "void main() {",
            "  vec4 alphaBlend = texture2D( alpha1, vUv);",
            "  vec4 texel1 = texture2D( diffuse1, offset1 + vUv * multiplier1 );",
            "  #ifdef USE_DIFFUSE2",
            "    vec4 texel2 = texture2D( diffuse2, offset2 + vUv * multiplier2 );",
            "  #endif",
            "  gl_FragColor = texel1;",
            "}"
        ].join("\n")
        
        
    }
    
    
};