70 lines
2.2 KiB
JavaScript
70 lines
2.2 KiB
JavaScript
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// define namespaces
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var THREEx = THREEx || {};
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THREEx.ShaderLib = THREEx.ShaderLib || {};
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THREEx.UniformsLib = THREEx.UniformsLib || {};
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// cel shader from ro.me - http://www.ro.me/tech/cel-shader - Apache License 2.0
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THREEx.UniformsLib['cel'] = {
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"uDirLightPos" : { type: "v3", value: new THREE.Vector3(1,0,0) },
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"uDirLightColor" : { type: "c" , value: new THREE.Color( 0xeeeeee ) },
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"uAmbientLightColor" : { type: "c" , value: new THREE.Color( 0x050505 ) },
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"uBaseColor" : { type: "c" , value: new THREE.Color( 0xff0000 ) }
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};
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THREEx.ShaderLib['cel'] = {
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vertexShader: [
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"varying vec3 vNormal;",
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"varying vec3 vRefract;",
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"void main() {",
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"vec4 mPosition = objectMatrix * vec4( position, 1.0 );",
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"vec4 mvPosition = modelViewMatrix * vec4( position, 1.0 );",
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"vec3 nWorld = normalize ( mat3( objectMatrix[0].xyz, objectMatrix[1].xyz, objectMatrix[2].xyz ) * normal );",
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"vNormal = normalize( normalMatrix * normal );",
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"vec3 I = mPosition.xyz - cameraPosition;",
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"vRefract = refract( normalize( I ), nWorld, 1.02 );",
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"gl_Position = projectionMatrix * mvPosition;",
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"}"
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].join( "\n" ),
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fragmentShader: [
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"uniform vec3 uBaseColor;",
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"uniform vec3 uDirLightPos;",
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"uniform vec3 uDirLightColor;",
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"uniform vec3 uAmbientLightColor;",
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"varying vec3 vNormal;",
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"varying vec3 vRefract;",
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"void main() {",
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"float directionalLightWeighting = max( dot( normalize( vNormal ), uDirLightPos ), 0.0);",
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"vec3 lightWeighting = uAmbientLightColor + uDirLightColor * directionalLightWeighting;",
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"float intensity = smoothstep( - 0.5, 1.0, pow( length(lightWeighting), 20.0 ) );",
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"intensity += length(lightWeighting) * 0.2;",
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"float cameraWeighting = dot( normalize( vNormal ), vRefract );",
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"intensity += pow( 1.0 - length( cameraWeighting ), 6.0 );",
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"intensity = intensity * 0.2 + 0.3;",
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"if ( intensity < 0.50 ) {",
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"gl_FragColor = vec4( 2.0 * intensity * uBaseColor, 1.0 );",
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"} else {",
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"gl_FragColor = vec4( 1.0 - 2.0 * ( 1.0 - intensity ) * ( 1.0 - uBaseColor ), 1.0 );",
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"}",
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"}"
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].join( "\n" )
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};
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