mirror of
https://github.com/nzp-team/dquakeplus.git
synced 2024-11-26 22:01:13 +00:00
493 lines
12 KiB
C++
493 lines
12 KiB
C++
/*
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
Copyright (C) 2007 Peter Mackay and Chris Swindle.
|
|
|
|
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 the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
// gl_mesh.c: triangle model functions
|
|
|
|
#include <string.h>
|
|
|
|
extern "C"
|
|
{
|
|
#include "../quakedef.h"
|
|
}
|
|
|
|
/*
|
|
=================================================================
|
|
|
|
ALIAS MODEL DISPLAY LIST GENERATION
|
|
|
|
=================================================================
|
|
*/
|
|
|
|
model_t *aliasmodel;
|
|
aliashdr_t *paliashdr;
|
|
|
|
int 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
|
|
================
|
|
*/
|
|
static 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->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->numtris ; j++)
|
|
if (used[j] == 2)
|
|
used[j] = 0;
|
|
|
|
return stripcount;
|
|
}
|
|
|
|
/*
|
|
===========
|
|
FanLength
|
|
===========
|
|
*/
|
|
static 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->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->numtris ; j++)
|
|
if (used[j] == 2)
|
|
used[j] = 0;
|
|
|
|
return stripcount;
|
|
}
|
|
|
|
|
|
/*
|
|
================
|
|
BuildTrisSingleTriGroup
|
|
by blubswillrule
|
|
because though I do appreciate the ram saving abilities of generating tristrips and fans, I do not enjoy the increased amount of gpu rendering calls due to having to pass each tristrip or trifan inividually
|
|
we're going to instead build one continuous array of triangles such that we can pass the entire model in one single draw call.
|
|
After testing:
|
|
rendering fps gains were negative (due to having more vertices), so let's not use this after all, hehe...
|
|
================
|
|
*/
|
|
/*
|
|
static void BuildTris (void)
|
|
{
|
|
int j, k;
|
|
int startv;
|
|
float s, t;
|
|
int len;
|
|
int bestverts[3072];//1024
|
|
int besttris[1024];
|
|
|
|
//
|
|
// build tristrips
|
|
//
|
|
|
|
numorder = 0;
|
|
numcommands = 0;
|
|
memset (used, 0, sizeof(used));
|
|
|
|
startv = 0;
|
|
|
|
mtriangle_t *check;
|
|
check = &triangles[0];
|
|
for(j = 0; j < pheader -> numtris; j++,check++)
|
|
{
|
|
besttris[j] = j;
|
|
for(k = 0; k < 3; k++)
|
|
{
|
|
//stripverts[stripcount+2] = check->vertindex[ (k+2)%3 ];
|
|
bestverts[(j * 3) + k] = check->vertindex[k];
|
|
}
|
|
}
|
|
|
|
len = pheader->numtris * 3;
|
|
commands[numcommands++] = len;
|
|
for (j=0 ; j< len; j++)
|
|
{
|
|
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->skinwidth / 2; // on back side
|
|
s = (s + 0.5) / pheader->skinwidth;
|
|
t = (t + 0.5) / pheader->skinheight;
|
|
|
|
*(float *)&commands[numcommands++] = s;
|
|
*(float *)&commands[numcommands++] = t;
|
|
}
|
|
commands[numcommands++] = 0; // end of list marker
|
|
allverts += len;
|
|
alltris += pheader->numtris;
|
|
}
|
|
*/
|
|
|
|
|
|
/*
|
|
================
|
|
BuildTris
|
|
|
|
Generate a list of trifans or strips
|
|
for the model, which holds for all frames
|
|
================
|
|
*/
|
|
|
|
static void BuildTris (void)
|
|
{
|
|
int i, j, k;
|
|
int startv;
|
|
float s, t;
|
|
int len, bestlen, besttype;
|
|
int bestverts[1024];
|
|
int besttris[1024];
|
|
int type;
|
|
|
|
//
|
|
// build tristrips
|
|
//
|
|
numorder = 0;
|
|
numcommands = 0;
|
|
besttype = 0;
|
|
memset (used, 0, sizeof(used));
|
|
for (i=0 ; i<pheader->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->skinwidth / 2; // on back side
|
|
s = (s + 0.5) / pheader->skinwidth;
|
|
t = (t + 0.5) / pheader->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->numtris, numorder, numcommands);
|
|
|
|
allverts += numorder;
|
|
alltris += pheader->numtris;
|
|
}
|
|
|
|
#if MS2WRITING
|
|
/*
|
|
================
|
|
GL_MakeAliasModelDisplayLists
|
|
================
|
|
*/
|
|
void GL_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr)
|
|
{
|
|
aliasmodel = m;
|
|
paliashdr = hdr; // (aliashdr_t *)Mod_Extradata (m);
|
|
|
|
BuildTris();
|
|
|
|
// save the data out
|
|
|
|
paliashdr->poseverts = numorder;
|
|
|
|
int* cmds = static_cast<int*>(Hunk_Alloc (numcommands * 4));
|
|
paliashdr->commands = (byte *)cmds - (byte *)paliashdr;
|
|
memcpy (cmds, commands, numcommands * 4);
|
|
|
|
trivertx_t* verts = static_cast<trivertx_t*>(Hunk_Alloc (paliashdr->numposes * paliashdr->poseverts
|
|
* sizeof(trivertx_t) ));
|
|
paliashdr->posedata = (byte *)verts - (byte *)paliashdr;
|
|
for (int i=0 ; i<paliashdr->numposes ; i++)
|
|
for (int j=0 ; j<numorder ; j++)
|
|
*verts++ = poseverts[i][vertexorder[j]];
|
|
}
|
|
#else
|
|
|
|
void ScaleVerts (byte *original, vec3_t scaled)
|
|
{
|
|
scaled[0] = (float)original[0] * paliashdr->scale[0] + paliashdr->scale_origin[0];
|
|
scaled[1] = (float)original[1] * paliashdr->scale[1] + paliashdr->scale_origin[1];
|
|
scaled[2] = (float)original[2] * paliashdr->scale[2] + paliashdr->scale_origin[2];
|
|
}
|
|
|
|
/*
|
|
================
|
|
GL_MakeAliasModelDisplayLists
|
|
================
|
|
*/
|
|
void GL_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr)
|
|
{
|
|
int i, j;
|
|
int *cmds;
|
|
trivertx_t *verts;
|
|
|
|
aliasmodel = m;
|
|
paliashdr = hdr; // (aliashdr_t *)Mod_Extradata (m);
|
|
|
|
|
|
// Tonik: don't cache anything, because it seems just as fast
|
|
// (if not faster) to rebuild the tris instead of loading them from disk
|
|
|
|
BuildTris(); // trifans or lists
|
|
|
|
// save the data out
|
|
|
|
paliashdr->poseverts = numorder;
|
|
|
|
cmds = static_cast<int*>(Hunk_Alloc (numcommands * 4));
|
|
paliashdr->commands = (byte *)cmds - (byte *)paliashdr;
|
|
memcpy (cmds, commands, numcommands * 4);
|
|
|
|
verts = static_cast<trivertx_t*>(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]];
|
|
|
|
// code for elimination of muzzleflashes on viewmodels
|
|
/*if (m->modhint == MOD_WEAPON && qmb_initialized && r_part_muzzleflash.value)
|
|
{
|
|
vec3_t scaledf0, scaledf1; // scaled versions of the verts (need to prescale for comparison)
|
|
float vdiff; // difference in front to back movement
|
|
qboolean *nodraw; // true if the vert is a muzzleflash
|
|
|
|
// get pointers to the verts
|
|
trivertx_t *vertsf0 = (trivertx_t *)((byte *)hdr + hdr->posedata);
|
|
trivertx_t *vertsfi = (trivertx_t *)((byte *)hdr + hdr->posedata);
|
|
|
|
// set up the nodraw buffer
|
|
nodraw = static_cast<qboolean*>(malloc (numorder * sizeof(qboolean)));
|
|
|
|
// setthese pointers to the 0th and 1st frames
|
|
vertsf0 += hdr->frames[0].firstpose * hdr->poseverts;
|
|
vertsfi += hdr->frames[1].firstpose * hdr->poseverts;
|
|
|
|
// now go through them and compare. we expect that (a) the animation is sensible and there's no major
|
|
// difference between the 2 frames to be expected, and (b) any verts that do exhibit a major difference
|
|
// can be assumed to belong to the muzzleflash
|
|
for (j = 0; j < numorder; j++)
|
|
{
|
|
ScaleVerts (vertsf0->v, scaledf0);
|
|
ScaleVerts (vertsfi->v, scaledf1);
|
|
|
|
// get difference in front to back movement
|
|
vdiff = scaledf1[0] - scaledf0[0];
|
|
|
|
// if it's above a certain treshold, assume a muzzleflash and mark for nodraw
|
|
// 10 is the approx lowest range of visible front to back in a view model, so that seems reasonable to work with
|
|
if (vdiff > 10)
|
|
nodraw[j] = qtrue;
|
|
else nodraw[j] = qfalse;
|
|
|
|
// next set of verts
|
|
vertsf0++;
|
|
vertsfi++;
|
|
}
|
|
|
|
// copy the relevant verts from the first frame to every other frame
|
|
for (i = 1; i < paliashdr->numframes; i++)
|
|
{
|
|
// get pointers to the verts again
|
|
vertsf0 = (trivertx_t *)((byte *) hdr + hdr->posedata);
|
|
vertsfi = (trivertx_t *)((byte *) hdr + hdr->posedata);
|
|
|
|
// set these pointers to the 0th and i'th frames
|
|
vertsf0 += hdr->frames[0].firstpose * hdr->poseverts;
|
|
vertsfi += hdr->frames[i].firstpose * hdr->poseverts;
|
|
|
|
for (j = 0; j < numorder; j++)
|
|
{
|
|
// copy the verts from frame 0
|
|
if (nodraw[j])
|
|
{
|
|
vertsfi->v[0] = vertsf0->v[0];
|
|
vertsfi->v[1] = vertsf0->v[1];
|
|
vertsfi->v[2] = vertsf0->v[2];
|
|
}
|
|
|
|
// next set of verts
|
|
vertsf0++;
|
|
vertsfi++;
|
|
}
|
|
}
|
|
|
|
// release the nodraw buffer
|
|
free (nodraw);
|
|
}*/
|
|
}
|
|
#endif
|