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HTML/ThreeJS/node_modules/three/examples/js/shaders/RGBShiftShader.js

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+( function () {
+
+	/**
+ * RGB Shift Shader
+ * Shifts red and blue channels from center in opposite directions
+ * Ported from http://kriss.cx/tom/2009/05/rgb-shift/
+ * by Tom Butterworth / http://kriss.cx/tom/
+ *
+ * amount: shift distance (1 is width of input)
+ * angle: shift angle in radians
+ */
+	const RGBShiftShader = {
+		uniforms: {
+			'tDiffuse': {
+				value: null
+			},
+			'amount': {
+				value: 0.005
+			},
+			'angle': {
+				value: 0.0
+			}
+		},
+		vertexShader:
+  /* glsl */
+  `
+
+		varying vec2 vUv;
+
+		void main() {
+
+			vUv = uv;
+			gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
+
+		}`,
+		fragmentShader:
+  /* glsl */
+  `
+
+		uniform sampler2D tDiffuse;
+		uniform float amount;
+		uniform float angle;
+
+		varying vec2 vUv;
+
+		void main() {
+
+			vec2 offset = amount * vec2( cos(angle), sin(angle));
+			vec4 cr = texture2D(tDiffuse, vUv + offset);
+			vec4 cga = texture2D(tDiffuse, vUv);
+			vec4 cb = texture2D(tDiffuse, vUv - offset);
+			gl_FragColor = vec4(cr.r, cga.g, cb.b, cga.a);
+
+		}`
+	};
+
+	THREE.RGBShiftShader = RGBShiftShader;
+
+} )();