Temporarily added linearToRelativeLuminance.

Fixes #63.

Author: vanruesc

src/materials/glsl/bokeh2/shader.frag

@@ -1,5 +1,14 @@
 #include <common>
 
+// https://en.wikipedia.org/wiki/Relative_luminance
+float linearToRelativeLuminance(const in vec3 color) {
+
+	vec3 weights = vec3(0.2126, 0.7152, 0.0722);
+
+	return dot(weights, color.rgb);
+
+}
+
 uniform sampler2D tDiffuse;
 uniform sampler2D tDepth;
 

src/materials/glsl/film/shader.frag

@@ -20,6 +20,15 @@ varying vec2 vUv;
 
 	#include <common>
 
+	// https://en.wikipedia.org/wiki/Relative_luminance
+	float linearToRelativeLuminance(const in vec3 color) {
+
+		vec3 weights = vec3(0.2126, 0.7152, 0.0722);
+
+		return dot(weights, color.rgb);
+
+	}
+
 	uniform float greyscaleIntensity;
 
 #elif defined(SEPIA)

src/materials/glsl/luminosity/shader.frag

@@ -1,5 +1,14 @@
 #include <common>
 
+// https://en.wikipedia.org/wiki/Relative_luminance
+float linearToRelativeLuminance(const in vec3 color) {
+
+	vec3 weights = vec3(0.2126, 0.7152, 0.0722);
+
+	return dot(weights, color.rgb);
+
+}
+
 uniform sampler2D tDiffuse;
 uniform float distinction;
 uniform vec2 range;

src/materials/glsl/tone-mapping/shader.frag

@@ -1,5 +1,14 @@
 #include <common>
 
+// https://en.wikipedia.org/wiki/Relative_luminance
+float linearToRelativeLuminance(const in vec3 color) {
+
+	vec3 weights = vec3(0.2126, 0.7152, 0.0722);
+
+	return dot(weights, color.rgb);
+
+}
+
 uniform sampler2D tDiffuse;
 uniform float middleGrey;
 uniform float maxLuminance;