Functions for environment-mapped reflections. More...

#include "R2CubeMaps.h"

Include dependency graph for R2EnvironmentReflection.h:

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Functions
vec4	R2_environmentReflection (const samplerCube t, const vec3 v_eye, const vec3 n_eye, const mat4x4 view_inv)

Detailed Description

Functions for environment-mapped reflections.

Definition in file R2EnvironmentReflection.h.

Function Documentation

§ R2_environmentReflection()

vec4 R2_environmentReflection	(	const samplerCube	t,
		const vec3	v_eye,
		const vec3	n_eye,
		const mat4x4	view_inv
	)

Calculate a reflection based on the eye-space view direction v_eye and eye-space surface normal n_eye. The reflection vector is transformed to world-space using the inverse view transform view_inv and sampled from the right-handed cube map t.

Parameters

t	A right-handed cube map
v_eye	An eye-space view direction
n_eye	An eye-space surface normal
view_inv	An eye-space-to-world-space matrix

Definition at line 24 of file R2EnvironmentReflection.h.

 {
   vec3 v_eye_n = normalize (v_eye);
   vec3 n_eye_n = normalize (n_eye);
   vec3 r       = reflect (v_eye_n, n_eye_n);
   vec4 r_world = view_inv * vec4 (r, 0.0);
   return R2_cubeMapTextureRH (t, r_world.xyz);
 }