157 lines
3.0 KiB
C
157 lines
3.0 KiB
C
/***
|
|
*
|
|
* Copyright (c) 1996-2002, Valve LLC. All rights reserved.
|
|
*
|
|
* This product contains software technology licensed from Id
|
|
* Software, Inc. ("Id Technology"). Id Technology (c) 1996 Id Software, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
****/
|
|
|
|
|
|
#include "vis.h"
|
|
|
|
/*
|
|
|
|
Some textures (sky, water, slime, lava) are considered ambien sound emiters.
|
|
Find an aproximate distance to the nearest emiter of each class for each leaf.
|
|
|
|
*/
|
|
|
|
|
|
/*
|
|
====================
|
|
SurfaceBBox
|
|
|
|
====================
|
|
*/
|
|
void SurfaceBBox (dface_t *s, vec3_t mins, vec3_t maxs)
|
|
{
|
|
int i, j;
|
|
int e;
|
|
int vi;
|
|
float *v;
|
|
|
|
mins[0] = mins[1] = mins[2] = 999999;
|
|
maxs[0] = maxs[1] = maxs[2] = -99999;
|
|
|
|
for (i=0 ; i<s->numedges ; i++)
|
|
{
|
|
e = dsurfedges[s->firstedge+i];
|
|
if (e >= 0)
|
|
vi = dedges[e].v[0];
|
|
else
|
|
vi = dedges[-e].v[1];
|
|
v = dvertexes[vi].point;
|
|
|
|
for (j=0 ; j<3 ; j++)
|
|
{
|
|
if (v[j] < mins[j])
|
|
mins[j] = v[j];
|
|
if (v[j] > maxs[j])
|
|
maxs[j] = v[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
====================
|
|
CalcAmbientSounds
|
|
|
|
====================
|
|
*/
|
|
void CalcAmbientSounds (void)
|
|
{
|
|
int i, j, k, l;
|
|
dleaf_t *leaf, *hit;
|
|
byte *vis;
|
|
dface_t *surf;
|
|
vec3_t mins, maxs;
|
|
float d, maxd;
|
|
int ambient_type;
|
|
texinfo_t *info;
|
|
miptex_t *miptex;
|
|
int ofs;
|
|
float dists[NUM_AMBIENTS];
|
|
float vol;
|
|
|
|
for (i=0 ; i< portalleafs ; i++)
|
|
{
|
|
leaf = &dleafs[i+1];
|
|
|
|
//
|
|
// clear ambients
|
|
//
|
|
for (j=0 ; j<NUM_AMBIENTS ; j++)
|
|
dists[j] = 1020;
|
|
|
|
vis = &uncompressed[i*bitbytes];
|
|
|
|
for (j=0 ; j< portalleafs ; j++)
|
|
{
|
|
if ( !(vis[j>>3] & (1<<(j&7))) )
|
|
continue;
|
|
|
|
//
|
|
// check this leaf for sound textures
|
|
//
|
|
hit = &dleafs[j+1];
|
|
|
|
for (k=0 ; k< hit->nummarksurfaces ; k++)
|
|
{
|
|
surf = &dfaces[dmarksurfaces[hit->firstmarksurface + k]];
|
|
info = &texinfo[surf->texinfo];
|
|
ofs = ((dmiptexlump_t *)dtexdata)->dataofs[info->miptex];
|
|
miptex = (miptex_t *)(&dtexdata[ofs]);
|
|
|
|
if ( !Q_strncasecmp (miptex->name, "!water", 6) )
|
|
ambient_type = AMBIENT_WATER;
|
|
else if ( !Q_strncasecmp (miptex->name, "sky", 3) )
|
|
ambient_type = AMBIENT_SKY;
|
|
else if ( !Q_strncasecmp (miptex->name, "!slime", 6) )
|
|
ambient_type = AMBIENT_WATER; // AMBIENT_SLIME;
|
|
else if ( !Q_strncasecmp (miptex->name, "!lava", 6) )
|
|
ambient_type = AMBIENT_LAVA;
|
|
else if ( !Q_strncasecmp (miptex->name, "!04water", 8) )
|
|
ambient_type = AMBIENT_WATER;
|
|
else
|
|
continue;
|
|
|
|
// find distance from source leaf to polygon
|
|
SurfaceBBox (surf, mins, maxs);
|
|
maxd = 0;
|
|
for (l=0 ; l<3 ; l++)
|
|
{
|
|
if (mins[l] > leaf->maxs[l])
|
|
d = mins[l] - leaf->maxs[l];
|
|
else if (maxs[l] < leaf->mins[l])
|
|
d = leaf->mins[l] - mins[l];
|
|
else
|
|
d = 0;
|
|
if (d > maxd)
|
|
maxd = d;
|
|
}
|
|
|
|
maxd = 0.25;
|
|
if (maxd < dists[ambient_type])
|
|
dists[ambient_type] = maxd;
|
|
}
|
|
}
|
|
|
|
for (j=0 ; j<NUM_AMBIENTS ; j++)
|
|
{
|
|
if (dists[j] < 100)
|
|
vol = 1.0;
|
|
else
|
|
{
|
|
vol = 1.0 - dists[2]*0.002;
|
|
if (vol < 0)
|
|
vol = 0;
|
|
}
|
|
leaf->ambient_level[j] = vol*255;
|
|
}
|
|
}
|
|
}
|
|
|