webvr js meetup initial commit

node_modules/three/examples/js/shaders/ToneMapShader.js

@@ -0,0 +1,75 @@
+/**
+ * @author miibond
+ *
+ * Full-screen tone-mapping shader based on http://www.graphics.cornell.edu/~jaf/publications/sig02_paper.pdf
+ */
+
+THREE.ToneMapShader = {
+
+	uniforms: {
+
+		"tDiffuse": { value: null },
+		"averageLuminance":  { value: 1.0 },
+		"luminanceMap":  { value: null },
+		"maxLuminance":  { value: 16.0 },
+		"middleGrey":  { value: 0.6 }
+	},
+
+	vertexShader: [
+
+		"varying vec2 vUv;",
+
+		"void main() {",
+
+			"vUv = uv;",
+			"gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );",
+
+		"}"
+
+	].join( "\n" ),
+
+	fragmentShader: [
+
+		"uniform sampler2D tDiffuse;",
+
+		"varying vec2 vUv;",
+
+		"uniform float middleGrey;",
+		"uniform float maxLuminance;",
+		"#ifdef ADAPTED_LUMINANCE",
+			"uniform sampler2D luminanceMap;",
+		"#else",
+			"uniform float averageLuminance;",
+		"#endif",
+		
+		"const vec3 LUM_CONVERT = vec3(0.299, 0.587, 0.114);",
+
+		"vec3 ToneMap( vec3 vColor ) {",
+			"#ifdef ADAPTED_LUMINANCE",
+				// Get the calculated average luminance 
+				"float fLumAvg = texture2D(luminanceMap, vec2(0.5, 0.5)).r;",
+			"#else",
+				"float fLumAvg = averageLuminance;",
+			"#endif",
+			
+			// Calculate the luminance of the current pixel
+			"float fLumPixel = dot(vColor, LUM_CONVERT);",
+
+			// Apply the modified operator (Eq. 4)
+			"float fLumScaled = (fLumPixel * middleGrey) / fLumAvg;",
+
+			"float fLumCompressed = (fLumScaled * (1.0 + (fLumScaled / (maxLuminance * maxLuminance)))) / (1.0 + fLumScaled);",
+			"return fLumCompressed * vColor;",
+		"}",
+
+		"void main() {",
+
+			"vec4 texel = texture2D( tDiffuse, vUv );",
+			
+			"gl_FragColor = vec4( ToneMap( texel.xyz ), texel.w );",
+
+		"}"
+
+	].join( "\n" )
+
+};