webvr js meetup initial commit

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

@@ -0,0 +1,56 @@
+/**
+ * @author felixturner / http://airtight.cc/
+ *
+ * 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
+ */
+
+THREE.RGBShiftShader = {
+
+	uniforms: {
+
+		"tDiffuse": { value: null },
+		"amount":   { value: 0.005 },
+		"angle":    { value: 0.0 }
+
+	},
+
+	vertexShader: [
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"vUv = uv;",
+			"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+		"}"
+
+	].join( "\n" ),
+
+	fragmentShader: [
+
+		"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);",
+
+		"}"
+
+	].join( "\n" )
+
+};