import THREE from 'three'

/**
 * @author alteredq / http://alteredqualia.com/
 *
 * Full-screen textured quad shader
 */

THREE.CopyShader = {

  uniforms: {

    "tDiffuse": { type: "t", value: null },
    "opacity":  { type: "f", value: 1.0 }

  },

  vertexShader: [

    "varying vec2 vUv;",

    "void main() {",

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

    "}"

  ].join("\n"),

  fragmentShader: [

    "uniform float opacity;",

    "uniform sampler2D tDiffuse;",

    "varying vec2 vUv;",

    "void main() {",

      "vec4 texel = texture2D( tDiffuse, vUv );",
      "gl_FragColor = opacity * texel;",

    "}"

  ].join("\n")

};

export default THREE.CopyShader;