three
Version:
JavaScript 3D library
58 lines (36 loc) • 1.39 kB
JavaScript
console.warn( "THREE.BrightnessContrastShader: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation." );
/**
* Brightness and contrast adjustment
* https://github.com/evanw/glfx.js
* brightness: -1 to 1 (-1 is solid black, 0 is no change, and 1 is solid white)
* contrast: -1 to 1 (-1 is solid gray, 0 is no change, and 1 is maximum contrast)
*/
THREE.BrightnessContrastShader = {
uniforms: {
"tDiffuse": { value: null },
"brightness": { value: 0 },
"contrast": { value: 0 }
},
vertexShader: [
"varying vec2 vUv;",
"void main() {",
" vUv = uv;",
" gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
"}"
].join( "\n" ),
fragmentShader: [
"uniform sampler2D tDiffuse;",
"uniform float brightness;",
"uniform float contrast;",
"varying vec2 vUv;",
"void main() {",
" gl_FragColor = texture2D( tDiffuse, vUv );",
" gl_FragColor.rgb += brightness;",
" if (contrast > 0.0) {",
" gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) / (1.0 - contrast) + 0.5;",
" } else {",
" gl_FragColor.rgb = (gl_FragColor.rgb - 0.5) * (1.0 + contrast) + 0.5;",
" }",
"}"
].join( "\n" )
};