Accueil / npm / three@0.172.0 / examples / jsm / shaders / SepiaShader.js
SepiaShader.js
/**
* Sepia tone shader
* based on glfx.js sepia shader
* https://github.com/evanw/glfx.js
*/
const SepiaShader = {
name: 'SepiaShader',
uniforms: {
'tDiffuse': { value: null },
'amount': { value: 1.0 }
},
vertexShader: /* glsl */`
varying vec2 vUv;
void main() {
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
}`,
fragmentShader: /* glsl */`
uniform float amount;
uniform sampler2D tDiffuse;
varying vec2 vUv;
void main() {
vec4 color = texture2D( tDiffuse, vUv );
vec3 c = color.rgb;
color.r = dot( c, vec3( 1.0 - 0.607 * amount, 0.769 * amount, 0.189 * amount ) );
color.g = dot( c, vec3( 0.349 * amount, 1.0 - 0.314 * amount, 0.168 * amount ) );
color.b = dot( c, vec3( 0.272 * amount, 0.534 * amount, 1.0 - 0.869 * amount ) );
gl_FragColor = vec4( min( vec3( 1.0 ), color.rgb ), color.a );
}`
};
export { SepiaShader };