three-shaders/shaders/ColorifyShader.js

three-shaders - a library of shaders included with Three.js library

/**
 * @author alteredq / http://alteredqualia.com/
 *
 * Colorify shader
 */

var THREE = require('three');

function ColorifyShader() {

	return {

	uniforms: {

		tDiffuse: { value: null },
		color:    { value: new THREE.Color( 0xffffff ) }

	},

	vertexShader: `

		varying vec2 vUv;

		void main() {

			vUv = uv;
			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );

		}

	`,

	fragmentShader: `

		uniform vec3 color;
		uniform sampler2D tDiffuse;

		varying vec2 vUv;

		void main() {

			vec4 texel = texture2D( tDiffuse, vUv );

			vec3 luma = vec3( 0.299, 0.587, 0.114 );
			float v = dot( texel.xyz, luma );

			gl_FragColor = vec4( v * color, texel.w );

		}

	`
	}

};

module.exports = ColorifyShader;