1 files changed, 71 insertions, 0 deletions
diff --git a/downloads/LuminosityHighPassShader.js b/downloads/LuminosityHighPassShader.js
new file mode 100644
index 0000000..a5eab35
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+++ b/downloads/LuminosityHighPassShader.js
@@ -0,0 +1,71 @@
+( function () {
+
+	/**
+ * Luminosity
+ * http://en.wikipedia.org/wiki/Luminosity
+ */
+
+	const LuminosityHighPassShader = {
+		shaderID: 'luminosityHighPass',
+		uniforms: {
+			'tDiffuse': {
+				value: null
+			},
+			'luminosityThreshold': {
+				value: 1.0
+			},
+			'smoothWidth': {
+				value: 1.0
+			},
+			'defaultColor': {
+				value: new THREE.Color( 0x000000 )
+			},
+			'defaultOpacity': {
+				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 vec3 defaultColor;
+		uniform float defaultOpacity;
+		uniform float luminosityThreshold;
+		uniform float smoothWidth;
+
+		varying vec2 vUv;
+
+		void main() {
+
+			vec4 texel = texture2D( tDiffuse, vUv );
+
+			vec3 luma = vec3( 0.299, 0.587, 0.114 );
+
+			float v = dot( texel.xyz, luma );
+
+			vec4 outputColor = vec4( defaultColor.rgb, defaultOpacity );
+
+			float alpha = smoothstep( luminosityThreshold, luminosityThreshold + smoothWidth, v );
+
+			gl_FragColor = mix( outputColor, texel, alpha );
+
+		}`
+	};
+
+	THREE.LuminosityHighPassShader = LuminosityHighPassShader;
+
+} )();