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Small optimisation

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This commit is contained in:
Luke Benstead 2020-05-22 07:32:02 +01:00
parent 9bfb0c6eea
commit d932811be4
1 changed files with 6 additions and 3 deletions
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9
GL/lighting.c
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@ -10,7 +10,7 @@
/* Lighting will not be calculated if the attenuation
* multiplier ends up less than this value */
#define ATTENUATION_THRESHOLD 0.01f
#define ATTENUATION_THRESHOLD 100.0f
static GLfloat SCENE_AMBIENT [] = {0.2f, 0.2f, 0.2f, 1.0f};
static GLboolean VIEWER_IN_EYE_COORDINATES = GL_TRUE;
@ -553,9 +553,12 @@ void _glPerformLighting(Vertex* vertices, EyeSpaceData* es, const int32_t count)
) + (LIGHTS[i].quadratic_attenuation * D * D)
);
att = MATH_Fast_Invert(att);
/* Anything over the attenuation threshold will
* be a tiny value after inversion (< 0.01f) so
* let's just skip the lighting at that point */
if(att < ATTENUATION_THRESHOLD) {
att = MATH_Fast_Invert(att);
if(att >= ATTENUATION_THRESHOLD) {
float Hx = (Lx + Vx);
float Hy = (Ly + Vy);
float Hz = (Lz + Vz);