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https://github.com/Doodle3D/Doodle3D-Slicer.git
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59 lines
1.1 KiB
JavaScript
59 lines
1.1 KiB
JavaScript
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/**
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* @author tapio / http://tapio.github.com/
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*
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* Brightness and contrast adjustment
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* https://github.com/evanw/glfx.js
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* brightness: -1 to 1 (-1 is solid black, 0 is no change, and 1 is solid white)
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* contrast: -1 to 1 (-1 is solid gray, 0 is no change, and 1 is maximum contrast)
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*/
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THREE.BrightnessContrastShader = {
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uniforms: {
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"tDiffuse": { type: "t", value: null },
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"brightness": { type: "f", value: 0 },
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"contrast": { type: "f", value: 0 }
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},
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vertexShader: [
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"varying vec2 vUv;",
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"void main() {",
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"vUv = uv;",
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"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
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"}"
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].join("\n"),
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fragmentShader: [
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"uniform sampler2D tDiffuse;",
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"uniform float brightness;",
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"uniform float contrast;",
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"varying vec2 vUv;",
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"void main() {",
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"gl_FragColor = texture2D( tDiffuse, vUv );",
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"gl_FragColor.rgb += brightness;",
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"if (contrast > 0.0) {",
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"gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) / (1.0 - contrast) + 0.5;",
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"} else {",
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"gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) * (1.0 + contrast) + 0.5;",
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"}",
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"}"
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].join("\n")
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};
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