webvr js meetup initial commit

node_modules/three/examples/js/shaders/NormalMapShader.js

@@ -0,0 +1,53 @@
+/**
+ * @author alteredq / http://alteredqualia.com/
+ *
+ * Normal map shader
+ * - compute normals from heightmap
+ */
+
+THREE.NormalMapShader = {
+
+	uniforms: {
+
+		"heightMap":  { value: null },
+		"resolution": { value: new THREE.Vector2( 512, 512 ) },
+		"scale":      { value: new THREE.Vector2( 1, 1 ) },
+		"height":     { value: 0.05 }
+
+	},
+
+	vertexShader: [
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"vUv = uv;",
+			"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+		"}"
+
+	].join( "\n" ),
+
+	fragmentShader: [
+
+		"uniform float height;",
+		"uniform vec2 resolution;",
+		"uniform sampler2D heightMap;",
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"float val = texture2D( heightMap, vUv ).x;",
+
+			"float valU = texture2D( heightMap, vUv + vec2( 1.0 / resolution.x, 0.0 ) ).x;",
+			"float valV = texture2D( heightMap, vUv + vec2( 0.0, 1.0 / resolution.y ) ).x;",
+
+			"gl_FragColor = vec4( ( 0.5 * normalize( vec3( val - valU, val - valV, height  ) ) + 0.5 ), 1.0 );",
+
+		"}"
+
+	].join( "\n" )
+
+};