quakeforge/libs/models/alias/model_alias.c

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/*
gl_model.c
model loading and caching
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
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static const char rcsid[] =
"$Id$";
// models are the only shared resource between a client and server running
// on the same machine.
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/crc.h"
#include "QF/model.h"
#include "QF/msg.h"
#include "QF/qendian.h"
#include "QF/sys.h"
#include "QF/vfs.h"
#include "d_iface.h"
#include "r_local.h"
#include "compat.h"
aliashdr_t *pheader;
stvert_t *stverts;
mtriangle_t *triangles;
int stverts_size = 0;
int triangles_size = 0;
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// a pose is a single set of vertexes. a frame may be an animating
// sequence of poses
trivertx_t *poseverts[MAXALIASFRAMES];
int posenum = 0;
int aliasbboxmins[3], aliasbboxmaxs[3];
void *
Mod_LoadAllSkins (int numskins, daliasskintype_t *pskintype, int *pskinindex)
{
int snum, gnum, t;
int skinsize;
byte *skin;
int groupskins;
daliasskingroup_t *pinskingroup;
daliasskininterval_t *pinskinintervals;
maliasskindesc_t *pskindesc;
maliasskingroup_t *paliasskingroup;
float *poutskinintervals;
if (numskins < 1 || numskins > MAX_SKINS)
Sys_Error ("Mod_LoadAliasModel: Invalid # of skins: %d", numskins);
skinsize = pheader->mdl.skinwidth * pheader->mdl.skinheight;
pskindesc = Hunk_AllocName (numskins * sizeof (maliasskindesc_t),
loadname);
*pskinindex = (byte *) pskindesc - (byte *) pheader;
for (snum = 0; snum < numskins; snum++) {
pskindesc[snum].type = pskintype->type;
if (pskintype->type == ALIAS_SKIN_SINGLE) {
skin = (byte *) (pskintype + 1);
skin = Mod_LoadSkin (skin, skinsize, snum, 0, false,
&pskindesc[snum]);
} else {
pskintype++;
pinskingroup = (daliasskingroup_t *) pskintype;
groupskins = LittleLong (pinskingroup->numskins);
t = field_offset (maliasskingroup_t, skindescs[groupskins]);
paliasskingroup = Hunk_AllocName (t, loadname);
paliasskingroup->numskins = groupskins;
pskindesc[snum].skin = (byte *) paliasskingroup - (byte *) pheader;
pinskinintervals = (daliasskininterval_t *) (pinskingroup + 1);
poutskinintervals = Hunk_AllocName (groupskins * sizeof (float),
loadname);
paliasskingroup->intervals =
(byte *) poutskinintervals - (byte *) pheader;
for (gnum = 0; gnum < groupskins; gnum++) {
*poutskinintervals = LittleFloat (pinskinintervals->interval);
if (*poutskinintervals <= 0)
Sys_Error ("Mod_LoadAliasSkinGroup: interval<=0");
poutskinintervals++;
pinskinintervals++;
}
pskintype = (void *) pinskinintervals;
skin = (byte *) pskintype;
for (gnum = 0; gnum < groupskins; gnum++) {
paliasskingroup->skindescs[gnum].type = ALIAS_SKIN_SINGLE;
skin = Mod_LoadSkin (skin, skinsize, snum, gnum, true,
&paliasskingroup->skindescs[gnum]);
}
}
pskintype = (daliasskintype_t *) skin;
}
return pskintype;
}
void
Mod_LoadAliasModel (model_t *mod, void *buffer, cache_allocator_t allocator)
{
int i, j;
mdl_t *pinmodel, *pmodel;
stvert_t *pinstverts;
dtriangle_t *pintriangles;
int version, numframes;
int size;
daliasframetype_t *pframetype;
daliasskintype_t *pskintype;
int start, end, total;
byte *p;
int len;
unsigned short crc;
void *mem;
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int extra = 0; // extra precision bytes
if (LittleLong (*(unsigned int *) buffer) == POLYHEADER16)
extra = 1; // extra precision bytes
CRC_Init (&crc);
for (len = com_filesize, p = buffer; len; len--, p++)
CRC_ProcessByte (&crc, *p);
start = Hunk_LowMark ();
pinmodel = (mdl_t *) buffer;
version = LittleLong (pinmodel->version);
if (version != ALIAS_VERSION)
Sys_Error ("%s has wrong version number (%i should be %i)",
mod->name, version, ALIAS_VERSION);
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// allocate space for a working header, plus all the data except the
// frames, skin and group info
size = field_offset (aliashdr_t, frames[LittleLong (pinmodel->numframes)]);
pheader = Hunk_AllocName (size, loadname);
memset (pheader, 0, size);
pmodel = &pheader->mdl;
pheader->model = (byte *) pmodel - (byte *) pheader;
pheader->crc = crc;
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->ident = LittleLong (pinmodel->ident);
pmodel->boundingradius = LittleFloat (pinmodel->boundingradius);
pmodel->numskins = LittleLong (pinmodel->numskins);
pmodel->skinwidth = LittleLong (pinmodel->skinwidth);
pmodel->skinheight = LittleLong (pinmodel->skinheight);
if (pmodel->skinheight > MAX_LBM_HEIGHT)
Sys_Error ("model %s has a skin taller than %d", mod->name,
MAX_LBM_HEIGHT);
pmodel->numverts = LittleLong (pinmodel->numverts);
if (pmodel->numverts <= 0)
Sys_Error ("model %s has no vertices", mod->name);
if (pmodel->numverts > stverts_size)
{
stverts = realloc (stverts, pmodel->numverts * sizeof (stvert_t));
if (!stverts)
Sys_Error ("model_alias: out of memory");
stverts_size = pmodel->numverts;
}
pmodel->numtris = LittleLong (pinmodel->numtris);
if (pmodel->numtris <= 0)
Sys_Error ("model %s has no triangles", mod->name);
if (pmodel->numtris > triangles_size)
{
triangles = realloc (triangles, pmodel->numtris * sizeof (mtriangle_t));
if (!triangles)
Sys_Error ("model_alias: out of memory");
triangles_size = pmodel->numtris;
}
pmodel->numframes = LittleLong (pinmodel->numframes);
numframes = pmodel->numframes;
if (numframes < 1)
Sys_Error ("Mod_LoadAliasModel: Invalid # of frames: %d", numframes);
pmodel->size = LittleFloat (pinmodel->size) * ALIAS_BASE_SIZE_RATIO;
mod->synctype = LittleLong (pinmodel->synctype);
mod->numframes = pmodel->numframes;
for (i = 0; i < 3; i++) {
pmodel->scale[i] = LittleFloat (pinmodel->scale[i]);
pmodel->scale_origin[i] = LittleFloat (pinmodel->scale_origin[i]);
pmodel->eyeposition[i] = LittleFloat (pinmodel->eyeposition[i]);
}
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// load the skins
pskintype = (daliasskintype_t *) &pinmodel[1];
pskintype =
Mod_LoadAllSkins (pheader->mdl.numskins, pskintype, &pheader->skindesc);
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// load base s and t vertices
pinstverts = (stvert_t *) pskintype;
for (i = 0; i < pheader->mdl.numverts; i++) {
stverts[i].onseam = LittleLong (pinstverts[i].onseam);
stverts[i].s = LittleLong (pinstverts[i].s);
stverts[i].t = LittleLong (pinstverts[i].t);
}
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// load triangle lists
pintriangles = (dtriangle_t *) &pinstverts[pheader->mdl.numverts];
for (i = 0; i < pheader->mdl.numtris; i++) {
triangles[i].facesfront = LittleLong (pintriangles[i].facesfront);
for (j = 0; j < 3; j++) {
triangles[i].vertindex[j] =
LittleLong (pintriangles[i].vertindex[j]);
}
}
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// load the frames
posenum = 0;
pframetype = (daliasframetype_t *) &pintriangles[pheader->mdl.numtris];
aliasbboxmins[0] = aliasbboxmins[1] = aliasbboxmins[2] = 99999;
aliasbboxmaxs[0] = aliasbboxmaxs[1] = aliasbboxmaxs[2] = -99999;
for (i = 0; i < numframes; i++) {
aliasframetype_t frametype;
frametype = LittleLong (pframetype->type);
pheader->frames[i].type = frametype;
if (frametype == ALIAS_SINGLE) {
pframetype = (daliasframetype_t *)
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Mod_LoadAliasFrame (pframetype + 1, &posenum,
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&pheader->frames[i], extra);
} else {
pframetype = (daliasframetype_t *)
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Mod_LoadAliasGroup (pframetype + 1, &posenum,
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&pheader->frames[i], extra);
}
}
pheader->numposes = posenum;
mod->type = mod_alias;
for (i = 0; i < 3; i++) {
mod->mins[i] = aliasbboxmins[i] * pheader->mdl.scale[i] +
pheader->mdl.scale_origin[i];
mod->maxs[i] = aliasbboxmaxs[i] * pheader->mdl.scale[i] +
pheader->mdl.scale_origin[i];
}
// build the draw lists
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Mod_MakeAliasModelDisplayLists (mod, pheader, buffer, com_filesize, extra);
Mod_FinalizeAliasModel (mod, pheader);
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// move the complete, relocatable alias model to the cache
end = Hunk_LowMark ();
total = end - start;
mem = allocator (&mod->cache, total, loadname);
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if (mem)
memcpy (mem, pheader, total);
Hunk_FreeToLowMark (start);
}