mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-13 07:47:46 +00:00
c3f5581b0a
Unchained, Ultimate, Ultra, Up Yours, Underworld, Underground, Unified, Unity, etc. You know the drill. This takes care of the "standalone" problem with the wrong name, and the recent snafu with multiple developers working on the same files simultaneously...expect me (and probably others) to start locking dirs when updates are taking place. And yes, this update is really as large as it looks. Software only at the moment, but I will have the makefile updated to build the GL builds as well.
360 lines
7.5 KiB
C
360 lines
7.5 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// gl_mesh.c: triangle model functions
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#include "quakedef.h"
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/*
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=================================================================
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ALIAS MODEL DISPLAY LIST GENERATION
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=================================================================
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*/
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model_t *aliasmodel;
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aliashdr_t *paliashdr;
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qboolean used[8192];
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// the command list holds counts and s/t values that are valid for
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// every frame
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int commands[8192];
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int numcommands;
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// all frames will have their vertexes rearranged and expanded
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// so they are in the order expected by the command list
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int vertexorder[8192];
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int numorder;
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int allverts, alltris;
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int stripverts[128];
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int striptris[128];
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int stripcount;
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/*
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================
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StripLength
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================
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*/
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int StripLength (int starttri, int startv)
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{
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int m1, m2;
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int j;
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mtriangle_t *last, *check;
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int k;
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used[starttri] = 2;
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last = &triangles[starttri];
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stripverts[0] = last->vertindex[(startv)%3];
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stripverts[1] = last->vertindex[(startv+1)%3];
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stripverts[2] = last->vertindex[(startv+2)%3];
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striptris[0] = starttri;
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stripcount = 1;
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m1 = last->vertindex[(startv+2)%3];
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m2 = last->vertindex[(startv+1)%3];
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// look for a matching triangle
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nexttri:
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for (j=starttri+1, check=&triangles[starttri+1] ; j<pheader->numtris ; j++, check++)
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{
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if (check->facesfront != last->facesfront)
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continue;
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for (k=0 ; k<3 ; k++)
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{
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if (check->vertindex[k] != m1)
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continue;
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if (check->vertindex[ (k+1)%3 ] != m2)
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continue;
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// this is the next part of the fan
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// if we can't use this triangle, this tristrip is done
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if (used[j])
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goto done;
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// the new edge
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if (stripcount & 1)
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m2 = check->vertindex[ (k+2)%3 ];
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else
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m1 = check->vertindex[ (k+2)%3 ];
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stripverts[stripcount+2] = check->vertindex[ (k+2)%3 ];
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striptris[stripcount] = j;
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stripcount++;
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used[j] = 2;
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goto nexttri;
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}
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}
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done:
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// clear the temp used flags
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for (j=starttri+1 ; j<pheader->numtris ; j++)
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if (used[j] == 2)
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used[j] = 0;
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return stripcount;
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}
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/*
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===========
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FanLength
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===========
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*/
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int FanLength (int starttri, int startv)
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{
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int m1, m2;
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int j;
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mtriangle_t *last, *check;
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int k;
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used[starttri] = 2;
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last = &triangles[starttri];
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stripverts[0] = last->vertindex[(startv)%3];
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stripverts[1] = last->vertindex[(startv+1)%3];
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stripverts[2] = last->vertindex[(startv+2)%3];
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striptris[0] = starttri;
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stripcount = 1;
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m1 = last->vertindex[(startv+0)%3];
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m2 = last->vertindex[(startv+2)%3];
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// look for a matching triangle
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nexttri:
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for (j=starttri+1, check=&triangles[starttri+1] ; j<pheader->numtris ; j++, check++)
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{
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if (check->facesfront != last->facesfront)
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continue;
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for (k=0 ; k<3 ; k++)
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{
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if (check->vertindex[k] != m1)
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continue;
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if (check->vertindex[ (k+1)%3 ] != m2)
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continue;
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// this is the next part of the fan
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// if we can't use this triangle, this tristrip is done
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if (used[j])
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goto done;
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// the new edge
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m2 = check->vertindex[ (k+2)%3 ];
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stripverts[stripcount+2] = m2;
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striptris[stripcount] = j;
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stripcount++;
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used[j] = 2;
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goto nexttri;
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}
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}
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done:
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// clear the temp used flags
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for (j=starttri+1 ; j<pheader->numtris ; j++)
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if (used[j] == 2)
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used[j] = 0;
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return stripcount;
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}
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/*
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================
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BuildTris
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Generate a list of trifans or strips
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for the model, which holds for all frames
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================
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*/
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void BuildTris (void)
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{
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int i, j, k;
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int startv;
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mtriangle_t *last, *check;
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int m1, m2;
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int striplength;
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trivertx_t *v;
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mtriangle_t *tv;
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float s, t;
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int index;
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int len, bestlen, besttype;
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int bestverts[1024];
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int besttris[1024];
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int type;
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//
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// build tristrips
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//
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numorder = 0;
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numcommands = 0;
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memset (used, 0, sizeof(used));
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for (i=0 ; i<pheader->numtris ; i++)
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{
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// pick an unused triangle and start the trifan
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if (used[i])
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continue;
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bestlen = 0;
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for (type = 0 ; type < 2 ; type++)
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// type = 1;
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{
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for (startv =0 ; startv < 3 ; startv++)
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{
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if (type == 1)
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len = StripLength (i, startv);
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else
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len = FanLength (i, startv);
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if (len > bestlen)
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{
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besttype = type;
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bestlen = len;
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for (j=0 ; j<bestlen+2 ; j++)
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bestverts[j] = stripverts[j];
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for (j=0 ; j<bestlen ; j++)
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besttris[j] = striptris[j];
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}
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}
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}
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// mark the tris on the best strip as used
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for (j=0 ; j<bestlen ; j++)
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used[besttris[j]] = 1;
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if (besttype == 1)
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commands[numcommands++] = (bestlen+2);
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else
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commands[numcommands++] = -(bestlen+2);
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for (j=0 ; j<bestlen+2 ; j++)
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{
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// emit a vertex into the reorder buffer
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k = bestverts[j];
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vertexorder[numorder++] = k;
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// emit s/t coords into the commands stream
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s = stverts[k].s;
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t = stverts[k].t;
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if (!triangles[besttris[0]].facesfront && stverts[k].onseam)
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s += pheader->skinwidth / 2; // on back side
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s = (s + 0.5) / pheader->skinwidth;
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t = (t + 0.5) / pheader->skinheight;
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*(float *)&commands[numcommands++] = s;
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*(float *)&commands[numcommands++] = t;
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}
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}
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commands[numcommands++] = 0; // end of list marker
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Con_DPrintf ("%3i tri %3i vert %3i cmd\n", pheader->numtris, numorder, numcommands);
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allverts += numorder;
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alltris += pheader->numtris;
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}
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/*
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================
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GL_MakeAliasModelDisplayLists
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================
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*/
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void GL_MakeAliasModelDisplayLists (model_t *m, aliashdr_t *hdr)
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{
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int i, j;
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maliasgroup_t *paliasgroup;
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int *cmds;
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trivertx_t *verts;
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char cache[MAX_QPATH], fullpath[MAX_OSPATH], *c;
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FILE *f;
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int len;
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byte *data;
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aliasmodel = m;
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paliashdr = hdr; // (aliashdr_t *)Mod_Extradata (m);
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//
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// look for a cached version
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//
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strcpy (cache, "glquake/");
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COM_StripExtension (m->name+strlen("progs/"), cache+strlen("glquake/"));
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strcat (cache, ".ms2");
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COM_FOpenFile (cache, &f);
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if (f)
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{
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fread (&numcommands, 4, 1, f);
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fread (&numorder, 4, 1, f);
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fread (&commands, numcommands * sizeof(commands[0]), 1, f);
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fread (&vertexorder, numorder * sizeof(vertexorder[0]), 1, f);
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fclose (f);
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}
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else
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{
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//
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// build it from scratch
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//
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Con_Printf ("meshing %s...\n",m->name);
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BuildTris (); // trifans or lists
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//
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// save out the cached version
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//
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sprintf (fullpath, "%s/%s", com_gamedir, cache);
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f = fopen (fullpath, "wb");
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if (f)
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{
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fwrite (&numcommands, 4, 1, f);
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fwrite (&numorder, 4, 1, f);
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fwrite (&commands, numcommands * sizeof(commands[0]), 1, f);
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fwrite (&vertexorder, numorder * sizeof(vertexorder[0]), 1, f);
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fclose (f);
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}
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}
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// save the data out
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paliashdr->poseverts = numorder;
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cmds = Hunk_Alloc (numcommands * 4);
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paliashdr->commands = (byte *)cmds - (byte *)paliashdr;
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memcpy (cmds, commands, numcommands * 4);
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verts = Hunk_Alloc (paliashdr->numposes * paliashdr->poseverts
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* sizeof(trivertx_t) );
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paliashdr->posedata = (byte *)verts - (byte *)paliashdr;
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for (i=0 ; i<paliashdr->numposes ; i++)
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for (j=0 ; j<numorder ; j++)
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*verts++ = poseverts[i][vertexorder[j]];
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}
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