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[client] Change location of sun vector negation

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Moving the negation into the calculation of the sun angle prevents -0
getting into the vector (not that it makes much difference other than
minor confusion when reading the light data).
This commit is contained in:
Bill Currie 2022-05-09 22:54:47 +09:00
parent cfe7064708
commit 54b6573470
1 changed files with 6 additions and 4 deletions
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10
libs/client/cl_light.c
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@ -91,10 +91,12 @@ static vec4f_t
sun_vector (const vec_t *ang)
{
// ang is yaw, pitch (maybe roll, but ignored
// negative as the vector points *to* the sun, but ang specifies the
// direction from the sun
vec4f_t vec = {
ecos (ang[1]) * ecos (ang[0]),
ecos (ang[1]) * esin (ang[0]),
esin (ang[1]),
-ecos (ang[1]) * ecos (ang[0]),
-ecos (ang[1]) * esin (ang[0]),
-esin (ang[1]),
0,
};
return vec;
@ -120,7 +122,7 @@ parse_sun (lightingdata_t *ldata, plitem_t *entity)
}
VectorSet (1, 1, 1, light.color);
light.color[3] = sunlight;
light.position = -sun_vector (sunangle);
light.position = sun_vector (sunangle);
light.direction = light.position;
light.direction[3] = 1;
light.attenuation = (vec4f_t) { 0, 0, 1, 0 };