mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-29 15:23:02 +00:00
eae11661e4
strncat is not the maximum length of the destination string, but of the SOURCE string, thus strncat (dest, src, sizeof (dest)) is incorrect. It should be strncat (dest, src, sizeof (text) - strlen (dest)). Even then, no terminating nul will be written if src is too long, but at least it won't crash the stack:)
388 lines
8.3 KiB
C
388 lines
8.3 KiB
C
/*
|
|
gl_mesh.c
|
|
|
|
gl_mesh.c: triangle model functions
|
|
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
|
|
#include "bothdefs.h" // needed by: common.h, net.h, client.h
|
|
#include "qendian.h"
|
|
#include "quakefs.h"
|
|
#include "bspfile.h" // needed by: glquake.h
|
|
#include "vid.h"
|
|
#include "sys.h"
|
|
#include "mathlib.h" // needed by: protocol.h, render.h, client.h,
|
|
// modelgen.h, glmodel.h
|
|
#include "wad.h"
|
|
#include "draw.h"
|
|
#include "cvar.h"
|
|
#include "net.h" // needed by: client.h
|
|
#include "protocol.h" // needed by: client.h
|
|
#include "cmd.h"
|
|
#include "sbar.h"
|
|
#include "render.h" // needed by: client.h, model.h, glquake.h
|
|
#include "client.h" // need cls in this file
|
|
#include "model.h" // needed by: glquake.h
|
|
#include "console.h"
|
|
#include "glquake.h"
|
|
|
|
/*
|
|
=================================================================
|
|
|
|
ALIAS MODEL DISPLAY LIST GENERATION
|
|
|
|
=================================================================
|
|
*/
|
|
|
|
model_t *aliasmodel;
|
|
aliashdr_t *paliashdr;
|
|
|
|
qboolean used[8192];
|
|
|
|
// the command list holds counts and s/t values that are valid for
|
|
// every frame
|
|
int commands[8192];
|
|
int numcommands;
|
|
|
|
// all frames will have their vertexes rearranged and expanded
|
|
// so they are in the order expected by the command list
|
|
int vertexorder[8192];
|
|
int numorder;
|
|
|
|
int allverts, alltris;
|
|
|
|
int stripverts[128];
|
|
int striptris[128];
|
|
int stripcount;
|
|
|
|
/*
|
|
================
|
|
StripLength
|
|
================
|
|
*/
|
|
int StripLength (int starttri, int startv)
|
|
{
|
|
int m1, m2;
|
|
int j;
|
|
mtriangle_t *last, *check;
|
|
int k;
|
|
|
|
used[starttri] = 2;
|
|
|
|
last = &triangles[starttri];
|
|
|
|
stripverts[0] = last->vertindex[(startv)%3];
|
|
stripverts[1] = last->vertindex[(startv+1)%3];
|
|
stripverts[2] = last->vertindex[(startv+2)%3];
|
|
|
|
striptris[0] = starttri;
|
|
stripcount = 1;
|
|
|
|
m1 = last->vertindex[(startv+2)%3];
|
|
m2 = last->vertindex[(startv+1)%3];
|
|
|
|
// look for a matching triangle
|
|
nexttri:
|
|
for (j=starttri+1, check=&triangles[starttri+1] ; j<pheader->mdl.numtris ; j++, check++)
|
|
{
|
|
if (check->facesfront != last->facesfront)
|
|
continue;
|
|
for (k=0 ; k<3 ; k++)
|
|
{
|
|
if (check->vertindex[k] != m1)
|
|
continue;
|
|
if (check->vertindex[ (k+1)%3 ] != m2)
|
|
continue;
|
|
|
|
// this is the next part of the fan
|
|
|
|
// if we can't use this triangle, this tristrip is done
|
|
if (used[j])
|
|
goto done;
|
|
|
|
// the new edge
|
|
if (stripcount & 1)
|
|
m2 = check->vertindex[ (k+2)%3 ];
|
|
else
|
|
m1 = check->vertindex[ (k+2)%3 ];
|
|
|
|
stripverts[stripcount+2] = check->vertindex[ (k+2)%3 ];
|
|
striptris[stripcount] = j;
|
|
stripcount++;
|
|
|
|
used[j] = 2;
|
|
goto nexttri;
|
|
}
|
|
}
|
|
done:
|
|
|
|
// clear the temp used flags
|
|
for (j=starttri+1 ; j<pheader->mdl.numtris ; j++)
|
|
if (used[j] == 2)
|
|
used[j] = 0;
|
|
|
|
return stripcount;
|
|
}
|
|
|
|
/*
|
|
===========
|
|
FanLength
|
|
===========
|
|
*/
|
|
int FanLength (int starttri, int startv)
|
|
{
|
|
int m1, m2;
|
|
int j;
|
|
mtriangle_t *last, *check;
|
|
int k;
|
|
|
|
used[starttri] = 2;
|
|
|
|
last = &triangles[starttri];
|
|
|
|
stripverts[0] = last->vertindex[(startv)%3];
|
|
stripverts[1] = last->vertindex[(startv+1)%3];
|
|
stripverts[2] = last->vertindex[(startv+2)%3];
|
|
|
|
striptris[0] = starttri;
|
|
stripcount = 1;
|
|
|
|
m1 = last->vertindex[(startv+0)%3];
|
|
m2 = last->vertindex[(startv+2)%3];
|
|
|
|
|
|
// look for a matching triangle
|
|
nexttri:
|
|
for (j=starttri+1, check=&triangles[starttri+1] ; j<pheader->mdl.numtris ; j++, check++)
|
|
{
|
|
if (check->facesfront != last->facesfront)
|
|
continue;
|
|
for (k=0 ; k<3 ; k++)
|
|
{
|
|
if (check->vertindex[k] != m1)
|
|
continue;
|
|
if (check->vertindex[ (k+1)%3 ] != m2)
|
|
continue;
|
|
|
|
// this is the next part of the fan
|
|
|
|
// if we can't use this triangle, this tristrip is done
|
|
if (used[j])
|
|
goto done;
|
|
|
|
// the new edge
|
|
m2 = check->vertindex[ (k+2)%3 ];
|
|
|
|
stripverts[stripcount+2] = m2;
|
|
striptris[stripcount] = j;
|
|
stripcount++;
|
|
|
|
used[j] = 2;
|
|
goto nexttri;
|
|
}
|
|
}
|
|
done:
|
|
|
|
// clear the temp used flags
|
|
for (j=starttri+1 ; j<pheader->mdl.numtris ; j++)
|
|
if (used[j] == 2)
|
|
used[j] = 0;
|
|
|
|
return stripcount;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
BuildTris
|
|
|
|
Generate a list of trifans or strips
|
|
for the model, which holds for all frames
|
|
================
|
|
*/
|
|
void BuildTris (void)
|
|
{
|
|
int i, j, k;
|
|
int startv;
|
|
float s, t;
|
|
int len, bestlen, besttype = 0;
|
|
int bestverts[1024];
|
|
int besttris[1024];
|
|
int type;
|
|
|
|
//
|
|
// build tristrips
|
|
//
|
|
numorder = 0;
|
|
numcommands = 0;
|
|
memset (used, 0, sizeof(used));
|
|
for (i=0 ; i<pheader->mdl.numtris ; i++)
|
|
{
|
|
// pick an unused triangle and start the trifan
|
|
if (used[i])
|
|
continue;
|
|
|
|
bestlen = 0;
|
|
for (type = 0 ; type < 2 ; type++)
|
|
// type = 1;
|
|
{
|
|
for (startv =0 ; startv < 3 ; startv++)
|
|
{
|
|
if (type == 1)
|
|
len = StripLength (i, startv);
|
|
else
|
|
len = FanLength (i, startv);
|
|
if (len > bestlen)
|
|
{
|
|
besttype = type;
|
|
bestlen = len;
|
|
for (j=0 ; j<bestlen+2 ; j++)
|
|
bestverts[j] = stripverts[j];
|
|
for (j=0 ; j<bestlen ; j++)
|
|
besttris[j] = striptris[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
// mark the tris on the best strip as used
|
|
for (j=0 ; j<bestlen ; j++)
|
|
used[besttris[j]] = 1;
|
|
|
|
if (besttype == 1)
|
|
commands[numcommands++] = (bestlen+2);
|
|
else
|
|
commands[numcommands++] = -(bestlen+2);
|
|
|
|
for (j=0 ; j<bestlen+2 ; j++)
|
|
{
|
|
// emit a vertex into the reorder buffer
|
|
k = bestverts[j];
|
|
vertexorder[numorder++] = k;
|
|
|
|
// emit s/t coords into the commands stream
|
|
s = stverts[k].s;
|
|
t = stverts[k].t;
|
|
if (!triangles[besttris[0]].facesfront && stverts[k].onseam)
|
|
s += pheader->mdl.skinwidth / 2; // on back side
|
|
s = (s + 0.5) / pheader->mdl.skinwidth;
|
|
t = (t + 0.5) / pheader->mdl.skinheight;
|
|
|
|
*(float *)&commands[numcommands++] = s;
|
|
*(float *)&commands[numcommands++] = t;
|
|
}
|
|
}
|
|
|
|
commands[numcommands++] = 0; // end of list marker
|
|
|
|
Con_DPrintf ("%3i tri %3i vert %3i cmd\n", pheader->mdl.numtris, numorder, numcommands);
|
|
|
|
allverts += numorder;
|
|
alltris += pheader->mdl.numtris;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
GL_MakeAliasModelDisplayLists
|
|
================
|
|
*/
|
|
void GL_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr)
|
|
{
|
|
int i, j;
|
|
int *cmds;
|
|
trivertx_t *verts;
|
|
char cache[MAX_QPATH], fullpath[MAX_OSPATH];
|
|
QFile *f;
|
|
|
|
aliasmodel = m;
|
|
paliashdr = hdr; // (aliashdr_t *)Mod_Extradata (m);
|
|
|
|
//
|
|
// look for a cached version
|
|
//
|
|
strcpy (cache, "glquake/");
|
|
COM_StripExtension (m->name+strlen("progs/"), cache+strlen("glquake/"));
|
|
strncat (cache, ".ms2", sizeof(cache) - strlen (cache));
|
|
|
|
COM_FOpenFile (cache, &f);
|
|
if (f)
|
|
{
|
|
Qread (f, &numcommands, 4);
|
|
Qread (f, &numorder, 4);
|
|
Qread (f, &commands, numcommands * sizeof(commands[0]));
|
|
Qread (f, &vertexorder, numorder * sizeof(vertexorder[0]));
|
|
Qclose (f);
|
|
}
|
|
else
|
|
{
|
|
//
|
|
// build it from scratch
|
|
//
|
|
Con_Printf ("meshing %s...\n",m->name);
|
|
|
|
BuildTris (); // trifans or lists
|
|
|
|
//
|
|
// save out the cached version
|
|
//
|
|
snprintf (fullpath, sizeof(fullpath), "%s/%s", com_gamedir, cache);
|
|
f = Qopen (fullpath, "wb");
|
|
if (!f) {
|
|
COM_CreatePath (fullpath);
|
|
f = Qopen (fullpath, "wb");
|
|
}
|
|
|
|
if (f)
|
|
{
|
|
Qwrite (f, &numcommands, 4);
|
|
Qwrite (f, &numorder, 4);
|
|
Qwrite (f, &commands, numcommands * sizeof(commands[0]));
|
|
Qwrite (f, &vertexorder, numorder * sizeof(vertexorder[0]));
|
|
Qclose (f);
|
|
}
|
|
}
|
|
|
|
|
|
// save the data out
|
|
|
|
paliashdr->poseverts = numorder;
|
|
|
|
cmds = Hunk_Alloc (numcommands * 4);
|
|
paliashdr->commands = (byte *)cmds - (byte *)paliashdr;
|
|
memcpy (cmds, commands, numcommands * 4);
|
|
|
|
verts = Hunk_Alloc (paliashdr->numposes * paliashdr->poseverts
|
|
* sizeof(trivertx_t) );
|
|
paliashdr->posedata = (byte *)verts - (byte *)paliashdr;
|
|
for (i=0 ; i<paliashdr->numposes ; i++)
|
|
for (j=0 ; j<numorder ; j++)
|
|
*verts++ = poseverts[i][vertexorder[j]];
|
|
}
|
|
|