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reflect.3Cg
Langue: en
Version: 349322 (ubuntu - 24/10/10)
Section: 3 (Bibliothèques de fonctions)
NAME
reflect - returns the reflectiton vector given an incidence vector and a normal vector.SYNOPSIS
float reflect(float i, float n); float2 reflect(float2 i, float2 n); float3 reflect(float3 i, float3 n); float4 reflect(float4 i, float4 n);
PARAMETERS
- i
- Incidence vector.
- n
- Normal vector.
DESCRIPTION
Returns the reflectiton vector given an incidence vector i and a normal vector n. The resulting vector is the identical number of components as the two input vectors.The normal vector n should be normalized. If n is normalized, the output vector will have the same length as the input incidence vector i.
REFERENCE IMPLEMENTATION
reflect for float3 vectors could be implemented this way:float3 reflect( float3 i, float3 n ) { return i - 2.0 * n * dot(n,i); }
PROFILE SUPPORT
reflect is supported in all profiles.Support in the fp20 is limited.
SEE ALSO
dot, length, refractContenus ©2006-2024 Benjamin Poulain
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