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Readability improvements and minor speedup in R_AddDynamicLights.

This commit is contained in:
Forest Hale 2000-06-26 07:42:29 +00:00
parent 9bd5bd4ffb
commit 4698dc0d7d
1 changed files with 29 additions and 40 deletions
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69
source/gl_rsurf.c
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@ -108,8 +108,7 @@ R_AddDynamicLights (msurface_t *surf)
{
int lnum;
int sd, td;
float dist, rada, radb;
float red, green, blue, brightness;
float dist, maxdist, radb, brightness, red, green, blue, f;
vec3_t impact, local;
int s, t;
int i;
@ -126,57 +125,47 @@ R_AddDynamicLights (msurface_t *surf)
if ( !(surf->dlightbits & (1<<lnum) ) )
continue; // not lit by this light
dist = DotProduct (cl_dlights[lnum].origin, surf->plane->normal)
- surf->plane->dist;
dist = DotProduct (cl_dlights[lnum].origin, surf->plane->normal) - surf->plane->dist;
for (i=0 ; i<3 ; i++)
impact[i] = cl_dlights[lnum].origin[i] -
surf->plane->normal[i]*dist;
impact[i] = cl_dlights[lnum].origin[i] - surf->plane->normal[i]*dist;
local[0] = DotProduct (impact, tex->vecs[0]) + tex->vecs[0][3]
- surf->texturemins[0];
local[1] = DotProduct (impact, tex->vecs[1]) + tex->vecs[1][3]
- surf->texturemins[1];
local[0] = DotProduct (impact, tex->vecs[0]) + tex->vecs[0][3] - surf->texturemins[0];
local[1] = DotProduct (impact, tex->vecs[1]) + tex->vecs[1][3] - surf->texturemins[1];
s = bound (0, local[0]+0.5, (smax-1)*16);
t = bound (0, local[1]+0.5, (tmax-1)*16);
sd = local[0] - s;
td = local[1] - t;
dist *= dist;
// get brightest color's value
red = cl_dlights[lnum].color[0];
green = cl_dlights[lnum].color[1];
blue = cl_dlights[lnum].color[2];
brightness = max(red, max(green, blue));
rada = (cl_dlights[lnum].radius * cl_dlights[lnum].radius * 8) / (4.0/16.0); // comparison to min acceptable light
if (rada*brightness >= (sd*sd + td*td + dist)) {
radb = cl_dlights[lnum].radius
* cl_dlights[lnum].radius * (256.0*4.0);
bl = blocklights;
for (t = 0; t < tmax; t++)
maxdist = cl_dlights[lnum].radius*cl_dlights[lnum].radius; // for comparisons to minimum acceptable light
// if (cl_dlights[lnum].dark) // negate for darklight
// radb = cl_dlights[lnum].radius*cl_dlights[lnum].radius*-256.0*16.0; // negate and multiply by 256 for the code below
// else
radb = cl_dlights[lnum].radius*cl_dlights[lnum].radius*256.0*16.0; // multiply by 256 for the code below
bl = blocklights;
for (t = 0 ; t<tmax ; t++)
{
td = local[1] - t*16;
td = td*td + dist;
if (td < maxdist) // make sure some part of it is visible on this line
{
td = local[1] - t*16;
td = td*td + dist;
if (rada >= td) // any visible this line?
for (s=0 ; s<smax ; s++)
{
for (s = 0; s < smax; s++)
sd = local[0] - s*16;
if ((f = sd*sd+td) < maxdist)
{
sd = local[0] - s*16;
if (rada >= (sd*sd+td)) // minimum light
{
brightness = radb / (sd*sd+td);
*bl++ += brightness * red;
*bl++ += brightness * green;
*bl++ += brightness * blue;
} else
bl+=3; // skip pixel
brightness = radb / f;
*bl++ += brightness * red;
*bl++ += brightness * green;
*bl++ += brightness * blue;
}
} else
bl+=smax*3; // skip line
else
bl += 3; // skip pixel
}
}
else
bl+=smax*3; // skip line
}
}
}