three 基础库
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( function () {
/**
* Gamma Correction Shader
* http://en.wikipedia.org/wiki/gamma_correction
*/
const GammaCorrectionShader = {
uniforms: {
'tDiffuse': {
value: null
}
},
vertexShader:
/* glsl */
`
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}`,
fragmentShader:
/* glsl */
`
uniform sampler2D tDiffuse;
varying vec2 vUv;
void main() {
vec4 tex = texture2D( tDiffuse, vUv );
gl_FragColor = LinearTosRGB( tex ); // optional: LinearToGamma( tex, float( GAMMA_FACTOR ) );
}`
};
THREE.GammaCorrectionShader = GammaCorrectionShader;
} )();