webvr js meetup initial commit

node_modules/three/examples/js/shaders/DotScreenShader.js

@@ -0,0 +1,68 @@
+/**
+ * @author alteredq / http://alteredqualia.com/
+ *
+ * Dot screen shader
+ * based on glfx.js sepia shader
+ * https://github.com/evanw/glfx.js
+ */
+
+THREE.DotScreenShader = {
+
+	uniforms: {
+
+		"tDiffuse": { value: null },
+		"tSize":    { value: new THREE.Vector2( 256, 256 ) },
+		"center":   { value: new THREE.Vector2( 0.5, 0.5 ) },
+		"angle":    { value: 1.57 },
+		"scale":    { value: 1.0 }
+
+	},
+
+	vertexShader: [
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"vUv = uv;",
+			"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+		"}"
+
+	].join( "\n" ),
+
+	fragmentShader: [
+
+		"uniform vec2 center;",
+		"uniform float angle;",
+		"uniform float scale;",
+		"uniform vec2 tSize;",
+
+		"uniform sampler2D tDiffuse;",
+
+		"varying vec2 vUv;",
+
+		"float pattern() {",
+
+			"float s = sin( angle ), c = cos( angle );",
+
+			"vec2 tex = vUv * tSize - center;",
+			"vec2 point = vec2( c * tex.x - s * tex.y, s * tex.x + c * tex.y ) * scale;",
+
+			"return ( sin( point.x ) * sin( point.y ) ) * 4.0;",
+
+		"}",
+
+		"void main() {",
+
+			"vec4 color = texture2D( tDiffuse, vUv );",
+
+			"float average = ( color.r + color.g + color.b ) / 3.0;",
+
+			"gl_FragColor = vec4( vec3( average * 10.0 - 5.0 + pattern() ), color.a );",
+
+		"}"
+
+	].join( "\n" )
+
+};