lygia/v1.1.6/color/luminance)Computes the luminance of the specified linear RGB color using the luminance coefficients from Rec. 709.
Use:
luminance(<vec3|vec4> color)
#ifndef FNC_LUMINANCE
#define FNC_LUMINANCE
float luminance(in vec3 linear) { return dot(linear, vec3(0.21250175, 0.71537574, 0.07212251)); }
float luminance(in vec4 linear) { return luminance( linear.rgb ); }
#endif
Use:
luminance(<float3|float4> color)
#ifndef FNC_LUMINANCE
#define FNC_LUMINANCE
float luminance(in float3 _linear) { return dot(_linear, float3(0.2126, 0.7152, 0.0722)); }
float luminance(in float4 _linear) { return luminance( _linear.rgb ); }
#endif
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