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56 lines
939 B
56 lines
939 B
( function () {
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/**
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* Vignette shader
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* based on PaintEffect postprocess from ro.me
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* http://code.google.com/p/3-dreams-of-black/source/browse/deploy/js/effects/PaintEffect.js
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*/
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const VignetteShader = {
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uniforms: {
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'tDiffuse': {
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value: null
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},
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'offset': {
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value: 1.0
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},
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'darkness': {
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value: 1.0
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}
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},
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vertexShader:
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/* glsl */
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`
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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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fragmentShader:
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/* glsl */
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`
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uniform float offset;
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uniform float darkness;
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uniform sampler2D tDiffuse;
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varying vec2 vUv;
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void main() {
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// Eskil's vignette
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vec4 texel = texture2D( tDiffuse, vUv );
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vec2 uv = ( vUv - vec2( 0.5 ) ) * vec2( offset );
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gl_FragColor = vec4( mix( texel.rgb, vec3( 1.0 - darkness ), dot( uv, uv ) ), texel.a );
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}`
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};
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THREE.VignetteShader = VignetteShader;
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} )();
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