lygia/v1.2.0/color/palette/spectral/geoffrey)Use:
<vec3> spectral_geoffrey(<float> x)
#ifndef FNC_SPECTRAL_GEOFFREY
#define FNC_SPECTRAL_GEOFFREY
vec3 spectral_geoffrey(float t) {
vec3 r = (t * 2.0 - 0.5) * 2.1 - vec3(1.8, 1.14, 0.3);
return 0.99 - r * r;
}
#endif
Use:
<float3> spectral_geoffrey(<float> x)
#ifndef FNC_SPECTRAL_GEOFFREY
#define FNC_SPECTRAL_GEOFFREY
float3 spectral_geoffrey(float t) {
float3 r = (t * 2.0 - 0.5) * 2.1 - float3(1.8, 1.14, 0.3);
return 0.99 - r * r;
}
#endif
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