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- /**
- * Sepia tone shader
- * based on glfx.js sepia shader
- * https://github.com/evanw/glfx.js
- */
- var SepiaShader = {
- uniforms: {
- 'tDiffuse': { value: null },
- 'amount': { value: 1.0 }
- },
- vertexShader: [
- 'varying vec2 vUv;',
- 'void main() {',
- ' vUv = uv;',
- ' gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',
- '}'
- ].join( '\n' ),
- fragmentShader: [
- 'uniform float amount;',
- 'uniform sampler2D tDiffuse;',
- 'varying vec2 vUv;',
- 'void main() {',
- ' vec4 color = texture2D( tDiffuse, vUv );',
- ' vec3 c = color.rgb;',
- ' color.r = dot( c, vec3( 1.0 - 0.607 * amount, 0.769 * amount, 0.189 * amount ) );',
- ' color.g = dot( c, vec3( 0.349 * amount, 1.0 - 0.314 * amount, 0.168 * amount ) );',
- ' color.b = dot( c, vec3( 0.272 * amount, 0.534 * amount, 1.0 - 0.869 * amount ) );',
- ' gl_FragColor = vec4( min( vec3( 1.0 ), color.rgb ), color.a );',
- '}'
- ].join( '\n' )
- };
- export { SepiaShader };
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