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Implement the sun lighting calculations.

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The sun(s) won't work right now because the vectors aren't properly set up.
This commit is contained in:
Bill Currie 2013-01-02 21:08:44 +09:00
parent 4d4bcaf3a3
commit 5950803462
1 changed files with 69 additions and 0 deletions
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69
tools/qflight/source/ltface.c
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@ -446,6 +446,71 @@ SingleLightFace (entity_t *light, lightinfo_t *l)
l->lightstyles[mapnum] = light->style;
}
static void
SkyLightFace (entity_t *ent, int sun, lightinfo_t *l)
{
int sun_light = ent->sun_light[sun != 0];
const vec_t *sun_color = ent->sun_color[sun != 0];
const vec_t *sun_dir = ent->sun_dir[sun];
float dist;
int i;
int mapnum;
float angle;
float add;
vec3_t incoming;
lightpoint_t *point;
lightsample_t *sample;
if (sun_light <= 0)
return;
dist = DotProduct (sun_dir, l->facenormal);
// don't bother with lights behind the surface
if (dist <= -0.25)
return;
// if sunlight is set, use a style 0 light map
for (mapnum = 0; mapnum < MAXLIGHTMAPS; mapnum++) {
if (l->lightstyles[mapnum] == 0)
break;
if (l->lightstyles[mapnum] == 255) {
memset (l->sample[mapnum], 0,
sizeof (lightsample_t) * l->numsamples);
break;
}
}
if (mapnum == MAXLIGHTMAPS) {
//printf ("WARNING: Too many light styles on a face\n");
return;
}
// Check each point...
VectorCopy (sun_dir, incoming);
VectorNormalize (incoming);
angle = DotProduct (incoming, l->facenormal);
//anglesense = 0.5; //FIXME
// FIXME global
for (i = 0, point = l->point; i < l->numpoints; i++, point++) {
angle = DotProduct (incoming, l->facenormal);
if (!TestSky (l, point->v, sun_dir))
continue;
add = sun_light;
continue;
add *= angle;
add *= options.extrascale;
sample = &l->sample[mapnum][point->samplepos];
VectorMultAdd (sample->c, add, sun_color, sample->c);
}
}
#if 0
static void
FixMinlight (lightinfo_t *l)
@ -523,6 +588,10 @@ LightFace (lightinfo_t *l, int surfnum)
for (i = 0; i < num_novislights; i++) {
SingleLightFace (novislights[i], l);
}
if (world_entity && world_entity->num_suns) {
for (i = 0; i < world_entity->num_suns; i++)
SkyLightFace (world_entity, i, l);
}
// FixMinlight (&l);