lygia/v1.2.0/lighting/ior/2eta)index of refraction to ratio of index of refraction
Use:
<float|vec3|vec4> ior2eta(<float|vec3|vec4> ior)
#ifndef FNC_IOR2ETA
#define FNC_IOR2ETA
float ior2eta( const in float ior ) { return 1.0/ior; }
vec3 ior2eta( const in vec3 ior ) { return 1.0/ior; }
vec4 ior2eta( const in vec4 ior ) { return vec4(1.0/ior.rgb, ior.a); }
#endif
Use:
<float|float3|float4> ior2eta(<float|float3|float4> ior)
#ifndef FNC_IOR2ETA
#define FNC_IOR2ETA
float ior2eta( const float ior ) { return 1.0/ior; }
float3 ior2eta( const float3 ior ) { return 1.0/ior; }
float4 ior2eta( const float4 ior ) { return float4(1.0/ior.rgb, ior.a); }
#endif
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