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break out the 1 vs 3 lightmap components code into separate functions and

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do preliminary support for colored alias model lighting
This commit is contained in:
Bill Currie 2002-08-12 04:42:29 +00:00
parent 7e4e294089
commit 1afd2d95b2
1 changed files with 69 additions and 21 deletions
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90
libs/video/renderer/r_light.c
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@ -50,6 +50,7 @@ static const char rcsid[] =
dlight_t *r_dlights;
lightstyle_t r_lightstyle[MAX_LIGHTSTYLES];
vec3_t ambientcolor;
unsigned int r_maxdlights;
@ -318,12 +319,73 @@ R_PushDlights (const vec3_t entorigin)
mplane_t *lightplane;
vec3_t lightspot;
static int
calc_lighting_1 (msurface_t *surf, int ds, int dt)
{
int se_s = ((surf->extents[0] >> 4) + 1);
int se_t = ((surf->extents[0] >> 4) + 1);
int se_size = se_s * se_t;
int r = 0, maps;
byte *lightmap;
unsigned int scale;
ds >>= 4;
dt >>= 4;
lightmap = surf->samples;
if (lightmap) {
lightmap += dt * se_s + ds;
for (maps = 0; maps < MAXLIGHTMAPS && surf->styles[maps] != 255;
maps++) {
scale = d_lightstylevalue[surf->styles[maps]];
r += *lightmap * scale;
lightmap += se_size;
}
r >>= 8;
}
ambientcolor[2] = ambientcolor[1] = ambientcolor[0] = r;
return r;
}
static int
calc_lighting_3 (msurface_t *surf, int ds, int dt)
{
int se_s = ((surf->extents[0] >> 4) + 1);
int se_t = ((surf->extents[0] >> 4) + 1);
int se_size = se_s * se_t * 3;
int r = 0, maps;
byte *lightmap;
float scale;
ds >>= 4;
dt >>= 4;
VectorZero (ambientcolor);
lightmap = surf->samples;
if (lightmap) {
lightmap += dt * se_s * 3 + ds;
for (maps = 0; maps < MAXLIGHTMAPS && surf->styles[maps] != 255;
maps++) {
scale = d_lightstylevalue[surf->styles[maps]] / 256.0;
VectorMA (ambientcolor, scale, lightmap, ambientcolor);
lightmap += se_size;
}
}
r = (ambientcolor[0] + ambientcolor[1] + ambientcolor[2]) / 3;
return r;
}
int
RecursiveLightPoint (mnode_t *node, const vec3_t start, const vec3_t end)
{
int i, r, s, t, ds, dt, maps, side;
unsigned int scale;
byte *lightmap;
int i, r, s, t, ds, dt, side;
float front, back, frac;
mplane_t *plane;
msurface_t *surf;
@ -383,24 +445,10 @@ loop:
if (!surf->samples)
return 0;
ds >>= 4;
dt >>= 4;
lightmap = surf->samples;
r = 0;
if (lightmap) {
lightmap += (dt * ((surf->extents[0] >> 4) + 1) + ds) * mod_lightmap_bytes;
for (maps = 0; maps < MAXLIGHTMAPS && surf->styles[maps] != 255;
maps++) {
scale = d_lightstylevalue[surf->styles[maps]];
r += *lightmap * scale;
lightmap += ((surf->extents[0] >> 4) + 1) *
((surf->extents[1] >> 4) + 1) * mod_lightmap_bytes;
}
r >>= 8;
}
if (r_lightmap_components->int_val == 1)
return calc_lighting_1 (surf, ds, dt);
else
return calc_lighting_3 (surf, ds, dt);
return r;
}