mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-05 20:50:43 +00:00
307 lines
8.4 KiB
C
307 lines
8.4 KiB
C
/*
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gl_model.c
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model loading and caching
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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:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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static const char rcsid[] =
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"$Id$";
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// models are the only shared resource between a client and server running
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// on the same machine.
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "compat.h"
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#include "QF/crc.h"
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#include "QF/model.h"
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#include "QF/msg.h"
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#include "QF/qendian.h"
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#include "QF/sys.h"
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#include "QF/vfs.h"
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#include "d_iface.h"
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#include "r_local.h"
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/*
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ALIAS MODELS
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*/
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aliashdr_t *pheader;
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stvert_t *stverts;
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mtriangle_t *triangles;
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int stverts_size = 0;
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int triangles_size = 0;
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// a pose is a single set of vertexes. a frame may be an animating
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// sequence of poses
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trivertx_t *poseverts[MAXALIASFRAMES];
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int posenum = 0;
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void *
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Mod_LoadAllSkins (int numskins, daliasskintype_t *pskintype, int *pskinindex)
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{
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int snum, gnum, t;
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int skinsize;
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byte *skin;
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int groupskins;
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daliasskingroup_t *pinskingroup;
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daliasskininterval_t *pinskinintervals;
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maliasskindesc_t *pskindesc;
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maliasskingroup_t *paliasskingroup;
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float *poutskinintervals;
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if (numskins < 1 || numskins > MAX_SKINS)
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Sys_Error ("Mod_LoadAliasModel: Invalid # of skins: %d\n", numskins);
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skinsize = pheader->mdl.skinwidth * pheader->mdl.skinheight;
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pskindesc = Hunk_AllocName (numskins * sizeof (maliasskindesc_t),
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loadname);
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*pskinindex = (byte *) pskindesc - (byte *) pheader;
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for (snum = 0; snum < numskins; snum++) {
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pskindesc[snum].type = pskintype->type;
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if (pskintype->type == ALIAS_SKIN_SINGLE) {
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skin = (byte *) (pskintype + 1);
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skin = Mod_LoadSkin (skin, skinsize, snum, 0, false,
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&pskindesc[snum]);
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} else {
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pskintype++;
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pinskingroup = (daliasskingroup_t *) pskintype;
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groupskins = LittleLong (pinskingroup->numskins);
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t = field_offset (maliasskingroup_t, skindescs[groupskins]);
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paliasskingroup = Hunk_AllocName (t, loadname);
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paliasskingroup->numskins = groupskins;
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pskindesc[snum].skin = (byte *) paliasskingroup - (byte *) pheader;
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pinskinintervals = (daliasskininterval_t *) (pinskingroup + 1);
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poutskinintervals = Hunk_AllocName (groupskins * sizeof (float),
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loadname);
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paliasskingroup->intervals =
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(byte *) poutskinintervals - (byte *) pheader;
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for (gnum = 0; gnum < groupskins; gnum++) {
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*poutskinintervals = LittleFloat (pinskinintervals->interval);
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if (*poutskinintervals <= 0)
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Sys_Error ("Mod_LoadAliasSkinGroup: interval<=0");
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poutskinintervals++;
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pinskinintervals++;
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}
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pskintype = (void *) pinskinintervals;
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skin = (byte *) pskintype;
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for (gnum = 0; gnum < groupskins; gnum++) {
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paliasskingroup->skindescs[gnum].type = ALIAS_SKIN_SINGLE;
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skin = Mod_LoadSkin (skin, skinsize, snum, gnum, true,
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&paliasskingroup->skindescs[gnum]);
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}
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}
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pskintype = (daliasskintype_t *) skin;
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}
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return pskintype;
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}
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void
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Mod_LoadAliasModel (model_t *mod, void *buffer, cache_allocator_t allocator)
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{
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int i, j;
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mdl_t *pinmodel, *pmodel;
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stvert_t *pinstverts;
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dtriangle_t *pintriangles;
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int version, numframes;
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int size;
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daliasframetype_t *pframetype;
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daliasskintype_t *pskintype;
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int start, end, total;
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byte *p;
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int len;
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unsigned short crc;
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void *mem;
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int extra = 0; // extra precision bytes
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if (LittleLong (*(unsigned int *) buffer) == POLYHEADER16)
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extra = 1; // extra precision bytes
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CRC_Init (&crc);
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for (len = com_filesize, p = buffer; len; len--, p++)
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CRC_ProcessByte (&crc, *p);
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start = Hunk_LowMark ();
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pinmodel = (mdl_t *) buffer;
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version = LittleLong (pinmodel->version);
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if (version != ALIAS_VERSION)
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Sys_Error ("%s has wrong version number (%i should be %i)",
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mod->name, version, ALIAS_VERSION);
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// allocate space for a working header, plus all the data except the
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// frames, skin and group info
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size = field_offset (aliashdr_t, frames[LittleLong (pinmodel->numframes)]);
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pheader = Hunk_AllocName (size, loadname);
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memset (pheader, 0, size);
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pmodel = &pheader->mdl;
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pheader->model = (byte *) pmodel - (byte *) pheader;
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pheader->crc = crc;
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mod->flags = LittleLong (pinmodel->flags);
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// endian-adjust and copy the data, starting with the alias model header
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pmodel->boundingradius = LittleFloat (pinmodel->boundingradius);
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pmodel->numskins = LittleLong (pinmodel->numskins);
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pmodel->skinwidth = LittleLong (pinmodel->skinwidth);
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pmodel->skinheight = LittleLong (pinmodel->skinheight);
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if (pmodel->skinheight > MAX_LBM_HEIGHT)
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Sys_Error ("model %s has a skin taller than %d", mod->name,
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MAX_LBM_HEIGHT);
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pmodel->numverts = LittleLong (pinmodel->numverts);
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if (pmodel->numverts <= 0)
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Sys_Error ("model %s has no vertices", mod->name);
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if (pmodel->numverts > stverts_size)
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{
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stverts = realloc (stverts, pmodel->numverts * sizeof (stvert_t));
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if (!stverts)
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Sys_Error ("model_alias: out of memory");
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stverts_size = pmodel->numverts;
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}
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pmodel->numtris = LittleLong (pinmodel->numtris);
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if (pmodel->numtris <= 0)
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Sys_Error ("model %s has no triangles", mod->name);
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if (pmodel->numtris > triangles_size)
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{
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triangles = realloc (triangles, pmodel->numtris * sizeof (mtriangle_t));
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if (!triangles)
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Sys_Error ("model_alias: out of memory");
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triangles_size = pmodel->numtris;
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}
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pmodel->numframes = LittleLong (pinmodel->numframes);
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numframes = pmodel->numframes;
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if (numframes < 1)
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Sys_Error ("Mod_LoadAliasModel: Invalid # of frames: %d\n", numframes);
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pmodel->size = LittleFloat (pinmodel->size) * ALIAS_BASE_SIZE_RATIO;
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mod->synctype = LittleLong (pinmodel->synctype);
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mod->numframes = pmodel->numframes;
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for (i = 0; i < 3; i++) {
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pmodel->scale[i] = LittleFloat (pinmodel->scale[i]);
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pmodel->scale_origin[i] = LittleFloat (pinmodel->scale_origin[i]);
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pmodel->eyeposition[i] = LittleFloat (pinmodel->eyeposition[i]);
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}
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// load the skins
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pskintype = (daliasskintype_t *) &pinmodel[1];
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pskintype =
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Mod_LoadAllSkins (pheader->mdl.numskins, pskintype, &pheader->skindesc);
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// load base s and t vertices
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pinstverts = (stvert_t *) pskintype;
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for (i = 0; i < pheader->mdl.numverts; i++) {
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stverts[i].onseam = LittleLong (pinstverts[i].onseam);
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stverts[i].s = LittleLong (pinstverts[i].s);
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stverts[i].t = LittleLong (pinstverts[i].t);
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}
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// load triangle lists
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pintriangles = (dtriangle_t *) &pinstverts[pheader->mdl.numverts];
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for (i = 0; i < pheader->mdl.numtris; i++) {
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triangles[i].facesfront = LittleLong (pintriangles[i].facesfront);
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for (j = 0; j < 3; j++) {
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triangles[i].vertindex[j] =
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LittleLong (pintriangles[i].vertindex[j]);
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}
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}
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// load the frames
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posenum = 0;
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pframetype = (daliasframetype_t *) &pintriangles[pheader->mdl.numtris];
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for (i = 0; i < numframes; i++) {
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aliasframetype_t frametype;
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frametype = LittleLong (pframetype->type);
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pheader->frames[i].type = frametype;
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if (frametype == ALIAS_SINGLE) {
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pframetype = (daliasframetype_t *)
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Mod_LoadAliasFrame (pframetype + 1, &posenum,
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&pheader->frames[i], extra);
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} else {
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pframetype = (daliasframetype_t *)
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Mod_LoadAliasGroup (pframetype + 1, &posenum,
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&pheader->frames[i], extra);
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}
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}
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pheader->numposes = posenum;
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mod->type = mod_alias;
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// FIXME: do this right
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mod->mins[0] = mod->mins[1] = mod->mins[2] = -16;
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mod->maxs[0] = mod->maxs[1] = mod->maxs[2] = 16;
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// build the draw lists
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Mod_MakeAliasModelDisplayLists (mod, pheader, buffer, com_filesize, extra);
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Mod_FinalizeAliasModel (mod, pheader);
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// move the complete, relocatable alias model to the cache
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end = Hunk_LowMark ();
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total = end - start;
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mem = allocator (&mod->cache, total, loadname);
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if (!mem)
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return; // FIXME: shouldn't this call Hunk_FreeToLowMark too?!?!
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memcpy (mem, pheader, total);
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Hunk_FreeToLowMark (start);
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}
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