Initial commit

js/HorizontalColorationPass.js

@@ -0,0 +1,54 @@
+/**
+ * @author rezmason
+ */
+
+THREE.HorizontalColorationPass = function (colors) {
+  const values = new Uint8Array([].concat(...colors.map(color => color.toArray().map(component => Math.floor(component * 255)))));
+
+  this.dataTexture = new THREE.DataTexture(
+    values,
+    values.length / 3,
+    1,
+    THREE.RGBFormat,
+    THREE.UnsignedByteType,
+    THREE.UVMapping);
+  this.dataTexture.magFilter = THREE.LinearFilter;
+  this.dataTexture.needsUpdate = true;
+
+  this.shader = {
+    uniforms: {
+      tDiffuse: { value: null },
+      tColorData: { value: this.dataTexture },
+    },
+
+    vertexShader: `
+      varying vec2 vUv;
+      void main() {
+        vUv = uv;
+        gl_Position = vec4( position, 1.0 );
+      }
+    `,
+
+    fragmentShader: `
+      uniform sampler2D tDiffuse;
+      uniform sampler2D tColorData;
+      varying vec2 vUv;
+
+      void main() {
+        float value = texture2D(tDiffuse, vUv).r;
+        vec3 value2 = texture2D(tColorData, vUv).rgb;
+        gl_FragColor = vec4(value2 * value, 1.0);
+      }
+    `
+  };
+
+  THREE.ShaderPass.call(this, this.shader);
+};
+
+THREE.HorizontalColorationPass.prototype = Object.assign( Object.create( THREE.Pass.prototype ), {
+  constructor: THREE.HorizontalColorationPass,
+  render: function() {
+    this.uniforms[ "tColorData" ].value = this.dataTexture;
+    THREE.ShaderPass.prototype.render.call(this, ...arguments);
+  }
+});