You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
1.7 KiB
88 lines
1.7 KiB
2 years ago
|
( function () {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Full-screen tone-mapping shader based on http://www.cis.rit.edu/people/faculty/ferwerda/publications/sig02_paper.pdf
|
||
|
|
*/
|
||
|
|
var ToneMapShader = {
|
||
|
|
uniforms: {
|
||
|
|
'tDiffuse': {
|
||
|
|
value: null
|
||
|
|
},
|
||
|
|
'averageLuminance': {
|
||
|
|
value: 1.0
|
||
|
|
},
|
||
|
|
'luminanceMap': {
|
||
|
|
value: null
|
||
|
|
},
|
||
|
|
'maxLuminance': {
|
||
|
|
value: 16.0
|
||
|
|
},
|
||
|
|
'minLuminance': {
|
||
|
|
value: 0.01
|
||
|
|
},
|
||
|
|
'middleGrey': {
|
||
|
|
value: 0.6
|
||
|
|
}
|
||
|
|
},
|
||
|
|
vertexShader:
|
||
|
|
/* glsl */
|
||
|
|
`
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vUv = uv;
|
||
|
|
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
|
||
|
|
|
||
|
|
}`,
|
||
|
|
fragmentShader:
|
||
|
|
/* glsl */
|
||
|
|
`
|
||
|
|
|
||
|
|
#include <common>
|
||
|
|
|
||
|
|
uniform sampler2D tDiffuse;
|
||
|
|
|
||
|
|
varying vec2 vUv;
|
||
|
|
|
||
|
|
uniform float middleGrey;
|
||
|
|
uniform float minLuminance;
|
||
|
|
uniform float maxLuminance;
|
||
|
|
#ifdef ADAPTED_LUMINANCE
|
||
|
|
uniform sampler2D luminanceMap;
|
||
|
|
#else
|
||
|
|
uniform float averageLuminance;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
vec3 ToneMap( vec3 vColor ) {
|
||
|
|
#ifdef ADAPTED_LUMINANCE
|
||
|
|
// Get the calculated average luminance
|
||
|
|
float fLumAvg = texture2D(luminanceMap, vec2(0.5, 0.5)).r;
|
||
|
|
#else
|
||
|
|
float fLumAvg = averageLuminance;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Calculate the luminance of the current pixel
|
||
|
|
float fLumPixel = linearToRelativeLuminance( vColor );
|
||
|
|
|
||
|
|
// Apply the modified operator (Eq. 4)
|
||
|
|
float fLumScaled = (fLumPixel * middleGrey) / max( minLuminance, fLumAvg );
|
||
|
|
|
||
|
|
float fLumCompressed = (fLumScaled * (1.0 + (fLumScaled / (maxLuminance * maxLuminance)))) / (1.0 + fLumScaled);
|
||
|
|
return fLumCompressed * vColor;
|
||
|
|
}
|
||
|
|
|
||
|
|
void main() {
|
||
|
|
|
||
|
|
vec4 texel = texture2D( tDiffuse, vUv );
|
||
|
|
|
||
|
|
gl_FragColor = vec4( ToneMap( texel.xyz ), texel.w );
|
||
|
|
|
||
|
|
}`
|
||
|
|
};
|
||
|
|
|
||
|
|
THREE.ToneMapShader = ToneMapShader;
|
||
|
|
|
||
|
|
} )();
|