mirror of
https://github.com/Shpoike/Quakespasm.git
synced 2024-11-14 00:50:38 +00:00
e007116a5d
Initially I thought that we would never need to draw an alias model that hadn't been precached when R_NewMap runs, but this assumption turned out to be incorrect. This fixes the issue where progs/bolt.mdl wasn't rendering in the Scourge Done Slick demos. git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@1253 af15c1b1-3010-417e-b628-4374ebc0bcbd
614 lines
15 KiB
C
614 lines
15 KiB
C
/*
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Copyright (C) 1996-2001 Id Software, Inc.
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Copyright (C) 2002-2009 John Fitzgibbons and others
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Copyright (C) 2010-2014 QuakeSpasm developers
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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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qmodel_t *aliasmodel;
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aliashdr_t *paliashdr;
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int used[8192]; // qboolean
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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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float s, t;
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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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besttype = 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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int tmp;
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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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// NOTE: 4 == sizeof(int)
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// == sizeof(float)
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memcpy (&tmp, &s, 4);
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commands[numcommands++] = tmp;
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memcpy (&tmp, &t, 4);
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commands[numcommands++] = tmp;
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}
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}
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commands[numcommands++] = 0; // end of list marker
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Con_DPrintf2 ("%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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static void GL_MakeAliasModelDisplayLists_VBO (void);
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static void GLMesh_LoadVertexBuffer (qmodel_t *m, const aliashdr_t *hdr);
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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 (qmodel_t *m, aliashdr_t *hdr)
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{
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int i, j;
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int *cmds;
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trivertx_t *verts;
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float hscale, vscale; //johnfitz -- padded skins
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int count; //johnfitz -- precompute texcoords for padded skins
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int *loadcmds; //johnfitz
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//johnfitz -- padded skins
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hscale = (float)hdr->skinwidth/(float)TexMgr_PadConditional(hdr->skinwidth);
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vscale = (float)hdr->skinheight/(float)TexMgr_PadConditional(hdr->skinheight);
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//johnfitz
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aliasmodel = m;
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paliashdr = hdr; // (aliashdr_t *)Mod_Extradata (m);
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//johnfitz -- generate meshes
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Con_DPrintf2 ("meshing %s...\n",m->name);
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BuildTris ();
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// save the data out
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paliashdr->poseverts = numorder;
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cmds = (int *) Hunk_Alloc (numcommands * 4);
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paliashdr->commands = (byte *)cmds - (byte *)paliashdr;
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//johnfitz -- precompute texcoords for padded skins
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loadcmds = commands;
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while(1)
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{
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*cmds++ = count = *loadcmds++;
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if (!count)
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break;
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if (count < 0)
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count = -count;
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do
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{
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*(float *)cmds++ = hscale * (*(float *)loadcmds++);
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*(float *)cmds++ = vscale * (*(float *)loadcmds++);
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} while (--count);
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}
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//johnfitz
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verts = (trivertx_t *) Hunk_Alloc (paliashdr->numposes * paliashdr->poseverts * 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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// ericw
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GL_MakeAliasModelDisplayLists_VBO ();
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}
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unsigned int r_meshindexbuffer = 0;
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unsigned int r_meshvertexbuffer = 0;
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/*
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================
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GL_MakeAliasModelDisplayLists_VBO
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Saves data needed to build the VBO for this model on the hunk. Afterwards this
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is copied to Mod_Extradata.
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Original code by MH from RMQEngine
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================
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*/
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void GL_MakeAliasModelDisplayLists_VBO (void)
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{
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int i, j;
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int maxverts_vbo;
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trivertx_t *verts;
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unsigned short *indexes;
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aliasmesh_t *desc;
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if (!gl_glsl_alias_able)
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return;
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// first, copy the verts onto the hunk
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verts = (trivertx_t *) Hunk_Alloc (paliashdr->numposes * paliashdr->numverts * sizeof(trivertx_t));
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paliashdr->vertexes = (byte *)verts - (byte *)paliashdr;
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for (i=0 ; i<paliashdr->numposes ; i++)
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for (j=0 ; j<paliashdr->numverts ; j++)
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verts[i*paliashdr->numverts + j] = poseverts[i][j];
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// there can never be more than this number of verts and we just put them all on the hunk
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maxverts_vbo = pheader->numtris * 3;
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desc = (aliasmesh_t *) Hunk_Alloc (sizeof (aliasmesh_t) * maxverts_vbo);
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// there will always be this number of indexes
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indexes = (unsigned short *) Hunk_Alloc (sizeof (unsigned short) * maxverts_vbo);
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pheader->indexes = (intptr_t) indexes - (intptr_t) pheader;
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pheader->meshdesc = (intptr_t) desc - (intptr_t) pheader;
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pheader->numindexes = 0;
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pheader->numverts_vbo = 0;
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for (i = 0; i < pheader->numtris; i++)
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{
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for (j = 0; j < 3; j++)
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{
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int v;
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// index into hdr->vertexes
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unsigned short vertindex = triangles[i].vertindex[j];
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// basic s/t coords
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int s = stverts[vertindex].s;
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int t = stverts[vertindex].t;
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// check for back side and adjust texcoord s
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if (!triangles[i].facesfront && stverts[vertindex].onseam) s += pheader->skinwidth / 2;
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// see does this vert already exist
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for (v = 0; v < pheader->numverts_vbo; v++)
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{
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// it could use the same xyz but have different s and t
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if (desc[v].vertindex == vertindex && (int) desc[v].st[0] == s && (int) desc[v].st[1] == t)
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{
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// exists; emit an index for it
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indexes[pheader->numindexes++] = v;
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// no need to check any more
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break;
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}
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}
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if (v == pheader->numverts_vbo)
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{
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// doesn't exist; emit a new vert and index
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indexes[pheader->numindexes++] = pheader->numverts_vbo;
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desc[pheader->numverts_vbo].vertindex = vertindex;
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desc[pheader->numverts_vbo].st[0] = s;
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desc[pheader->numverts_vbo++].st[1] = t;
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}
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}
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}
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// upload immediately
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GLMesh_LoadVertexBuffer (aliasmodel, pheader);
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}
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#define NUMVERTEXNORMALS 162
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extern float r_avertexnormals[NUMVERTEXNORMALS][3];
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/*
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================
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GLMesh_LoadVertexBuffer
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Upload the given alias model's mesh to a VBO
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Original code by MH from RMQEngine
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================
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*/
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static void GLMesh_LoadVertexBuffer (qmodel_t *m, const aliashdr_t *hdr)
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{
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int totalvbosize = 0;
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const aliasmesh_t *desc;
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const short *indexes;
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const trivertx_t *trivertexes;
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byte *vbodata;
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int f;
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if (!gl_glsl_alias_able)
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return;
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// count the sizes we need
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// ericw -- RMQEngine stored these vbo*ofs values in aliashdr_t, but we must not
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// mutate Mod_Extradata since it might be reloaded from disk, so I moved them to qmodel_t
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// (test case: roman1.bsp from arwop, 64mb heap)
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m->vboindexofs = 0;
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m->vboxyzofs = 0;
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totalvbosize += (hdr->numposes * hdr->numverts_vbo * sizeof (meshxyz_t)); // ericw -- what RMQEngine called nummeshframes is called numposes in QuakeSpasm
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m->vbostofs = totalvbosize;
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totalvbosize += (hdr->numverts_vbo * sizeof (meshst_t));
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if (!hdr->numindexes) return;
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if (!totalvbosize) return;
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// grab the pointers to data in the extradata
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desc = (aliasmesh_t *) ((byte *) hdr + hdr->meshdesc);
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indexes = (short *) ((byte *) hdr + hdr->indexes);
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trivertexes = (trivertx_t *) ((byte *)hdr + hdr->vertexes);
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// upload indices buffer
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GL_DeleteBuffersFunc (1, &m->meshindexesvbo);
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GL_GenBuffersFunc (1, &m->meshindexesvbo);
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GL_BindBufferFunc (GL_ELEMENT_ARRAY_BUFFER, m->meshindexesvbo);
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GL_BufferDataFunc (GL_ELEMENT_ARRAY_BUFFER, hdr->numindexes * sizeof (unsigned short), indexes, GL_STATIC_DRAW);
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// create the vertex buffer (empty)
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vbodata = (byte *) malloc(totalvbosize);
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memset(vbodata, 0, totalvbosize);
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// fill in the vertices at the start of the buffer
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for (f = 0; f < hdr->numposes; f++) // ericw -- what RMQEngine called nummeshframes is called numposes in QuakeSpasm
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{
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int v;
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meshxyz_t *xyz = (meshxyz_t *) (vbodata + (f * hdr->numverts_vbo * sizeof (meshxyz_t)));
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const trivertx_t *tv = trivertexes + (hdr->numverts * f);
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for (v = 0; v < hdr->numverts_vbo; v++)
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{
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trivertx_t trivert = tv[desc[v].vertindex];
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xyz[v].xyz[0] = trivert.v[0];
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xyz[v].xyz[1] = trivert.v[1];
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xyz[v].xyz[2] = trivert.v[2];
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xyz[v].xyz[3] = 1; // need w 1 for 4 byte vertex compression
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// map the normal coordinates in [-1..1] to [-127..127] and store in an unsigned char.
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// this introduces some error (less than 0.004), but the normals were very coarse
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// to begin with
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xyz[v].normal[0] = 127 * r_avertexnormals[trivert.lightnormalindex][0];
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xyz[v].normal[1] = 127 * r_avertexnormals[trivert.lightnormalindex][1];
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xyz[v].normal[2] = 127 * r_avertexnormals[trivert.lightnormalindex][2];
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|
xyz[v].normal[3] = 0; // unused; for 4-byte alignment
|
|
}
|
|
}
|
|
|
|
// fill in the ST coords at the end of the buffer
|
|
{
|
|
meshst_t *st;
|
|
float hscale, vscale;
|
|
|
|
//johnfitz -- padded skins
|
|
hscale = (float)hdr->skinwidth/(float)TexMgr_PadConditional(hdr->skinwidth);
|
|
vscale = (float)hdr->skinheight/(float)TexMgr_PadConditional(hdr->skinheight);
|
|
//johnfitz
|
|
|
|
st = (meshst_t *) (vbodata + m->vbostofs);
|
|
for (f = 0; f < hdr->numverts_vbo; f++)
|
|
{
|
|
st[f].st[0] = hscale * ((float) desc[f].st[0] + 0.5f) / (float) hdr->skinwidth;
|
|
st[f].st[1] = vscale * ((float) desc[f].st[1] + 0.5f) / (float) hdr->skinheight;
|
|
}
|
|
}
|
|
|
|
// upload vertexes buffer
|
|
GL_DeleteBuffersFunc (1, &m->meshvbo);
|
|
GL_GenBuffersFunc (1, &m->meshvbo);
|
|
GL_BindBufferFunc (GL_ARRAY_BUFFER, m->meshvbo);
|
|
GL_BufferDataFunc (GL_ARRAY_BUFFER, totalvbosize, vbodata, GL_STATIC_DRAW);
|
|
|
|
free (vbodata);
|
|
|
|
// invalidate the cached bindings
|
|
GL_ClearBufferBindings ();
|
|
}
|
|
|
|
/*
|
|
================
|
|
GLMesh_LoadVertexBuffers
|
|
|
|
Loop over all precached alias models, and upload each one to a VBO.
|
|
================
|
|
*/
|
|
void GLMesh_LoadVertexBuffers (void)
|
|
{
|
|
int j;
|
|
qmodel_t *m;
|
|
const aliashdr_t *hdr;
|
|
|
|
if (!gl_glsl_alias_able)
|
|
return;
|
|
|
|
for (j = 1; j < MAX_MODELS; j++)
|
|
{
|
|
if (!(m = cl.model_precache[j])) break;
|
|
if (m->type != mod_alias) continue;
|
|
|
|
hdr = (const aliashdr_t *) Mod_Extradata (m);
|
|
|
|
GLMesh_LoadVertexBuffer (m, hdr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
GLMesh_DeleteVertexBuffers
|
|
|
|
Delete VBOs for all loaded alias models
|
|
================
|
|
*/
|
|
void GLMesh_DeleteVertexBuffers (void)
|
|
{
|
|
int j;
|
|
qmodel_t *m;
|
|
|
|
if (!gl_glsl_alias_able)
|
|
return;
|
|
|
|
for (j = 1; j < MAX_MODELS; j++)
|
|
{
|
|
if (!(m = cl.model_precache[j])) break;
|
|
if (m->type != mod_alias) continue;
|
|
|
|
GL_DeleteBuffersFunc (1, &m->meshvbo);
|
|
m->meshvbo = 0;
|
|
|
|
GL_DeleteBuffersFunc (1, &m->meshindexesvbo);
|
|
m->meshindexesvbo = 0;
|
|
}
|
|
|
|
GL_ClearBufferBindings ();
|
|
}
|