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model.c
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model.c
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/*
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 the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// models.c -- model loading and caching
// models are the only shared resource between a client and server running
// on the same machine.
#include "quakedef.h"
#include "r_local.h"
model_t *loadmodel;
char loadname[32]; // for hunk tags
void Mod_LoadSpriteModel (model_t *mod, void *buffer);
void Mod_LoadBrushModel (model_t *mod, void *buffer);
void Mod_LoadAliasModel (model_t *mod, void *buffer);
model_t *Mod_LoadModel (model_t *mod, qboolean crash);
byte mod_novis[MAX_MAP_LEAFS/8];
#define MAX_MOD_KNOWN 256
model_t mod_known[MAX_MOD_KNOWN];
int mod_numknown;
// values for model_t's needload
#define NL_PRESENT 0
#define NL_NEEDS_LOADED 1
#define NL_UNREFERENCED 2
/*
===============
Mod_Init
===============
*/
void Mod_Init (void)
{
memset (mod_novis, 0xff, sizeof(mod_novis));
}
/*
===============
Mod_Extradata
Caches the data if needed
===============
*/
void *Mod_Extradata (model_t *mod)
{
void *r;
r = Cache_Check (&mod->cache);
if (r)
return r;
Mod_LoadModel (mod, true);
if (!mod->cache.data)
Sys_Error ("Mod_Extradata: caching failed");
return mod->cache.data;
}
/*
===============
Mod_PointInLeaf
===============
*/
mleaf_t *Mod_PointInLeaf (vec3_t p, model_t *model)
{
mnode_t *node;
float d;
mplane_t *plane;
if (!model || !model->nodes)
Sys_Error ("Mod_PointInLeaf: bad model");
node = model->nodes;
while (1)
{
if (node->contents < 0)
return (mleaf_t *)node;
plane = node->plane;
d = DotProduct (p,plane->normal) - plane->dist;
if (d > 0)
node = node->children[0];
else
node = node->children[1];
}
return NULL; // never reached
}
/*
===================
Mod_DecompressVis
===================
*/
byte *Mod_DecompressVis (byte *in, model_t *model)
{
static byte decompressed[MAX_MAP_LEAFS/8];
int c;
byte *out;
int row;
row = (model->numleafs+7)>>3;
out = decompressed;
if (!in)
{ // no vis info, so make all visible
while (row)
{
*out++ = 0xff;
row--;
}
return decompressed;
}
do
{
if (*in)
{
*out++ = *in++;
continue;
}
c = in[1];
in += 2;
while (c)
{
*out++ = 0;
c--;
}
} while (out - decompressed < row);
return decompressed;
}
byte *Mod_LeafPVS (mleaf_t *leaf, model_t *model)
{
if (leaf == model->leafs)
return mod_novis;
return Mod_DecompressVis (leaf->compressed_vis, model);
}
/*
===================
Mod_ClearAll
===================
*/
void Mod_ClearAll (void)
{
int i;
model_t *mod;
for (i=0 , mod=mod_known ; i<mod_numknown ; i++, mod++) {
mod->needload = NL_UNREFERENCED;
//FIX FOR CACHE_ALLOC ERRORS:
if (mod->type == mod_sprite) mod->cache.data = NULL;
}
}
/*
==================
Mod_FindName
==================
*/
model_t *Mod_FindName (char *name)
{
int i;
model_t *mod;
model_t *avail = NULL;
if (!name[0])
Sys_Error ("Mod_ForName: NULL name");
//
// search the currently loaded models
//
for (i=0 , mod=mod_known ; i<mod_numknown ; i++, mod++)
{
if (!strcmp (mod->name, name) )
break;
if (mod->needload == NL_UNREFERENCED)
if (!avail || mod->type != mod_alias)
avail = mod;
}
if (i == mod_numknown)
{
if (mod_numknown == MAX_MOD_KNOWN)
{
if (avail)
{
mod = avail;
if (mod->type == mod_alias)
if (Cache_Check (&mod->cache))
Cache_Free (&mod->cache);
}
else
Sys_Error ("mod_numknown == MAX_MOD_KNOWN");
}
else
mod_numknown++;
strcpy (mod->name, name);
mod->needload = NL_NEEDS_LOADED;
}
return mod;
}
/*
==================
Mod_TouchModel
==================
*/
void Mod_TouchModel (char *name)
{
model_t *mod;
mod = Mod_FindName (name);
if (mod->needload == NL_PRESENT)
{
if (mod->type == mod_alias)
Cache_Check (&mod->cache);
}
}
/*
==================
Mod_LoadModel
Loads a model into the cache
==================
*/
model_t *Mod_LoadModel (model_t *mod, qboolean crash)
{
unsigned *buf;
byte stackbuf[1024]; // avoid dirtying the cache heap
if (mod->type == mod_alias)
{
if (Cache_Check (&mod->cache))
{
mod->needload = NL_PRESENT;
return mod;
}
}
else
{
if (mod->needload == NL_PRESENT)
return mod;
}
//
// because the world is so huge, load it one piece at a time
//
//
// load the file
//
buf = (unsigned *)COM_LoadStackFile (mod->name, stackbuf, sizeof(stackbuf));
if (!buf)
{
if (crash)
Sys_Error ("Mod_NumForName: %s not found", mod->name);
return NULL;
}
//
// allocate a new model
//
COM_FileBase (mod->name, loadname);
loadmodel = mod;
//
// fill it in
//
// call the apropriate loader
mod->needload = NL_PRESENT;
switch (LittleLong(*(unsigned *)buf))
{
case IDPOLYHEADER:
Mod_LoadAliasModel (mod, buf);
break;
case IDSPRITEHEADER:
Mod_LoadSpriteModel (mod, buf);
break;
default:
Mod_LoadBrushModel (mod, buf);
break;
}
return mod;
}
/*
==================
Mod_ForName
Loads in a model for the given name
==================
*/
model_t *Mod_ForName (char *name, qboolean crash)
{
model_t *mod;
mod = Mod_FindName (name);
return Mod_LoadModel (mod, crash);
}
/*
===============================================================================
BRUSHMODEL LOADING
===============================================================================
*/
byte *mod_base;
/*
=================
Mod_LoadTextures
=================
*/
void Mod_LoadTextures (lump_t *l)
{
int i, j, pixels, num, max, altmax;
miptex_t *mt;
texture_t *tx, *tx2;
texture_t *anims[10];
texture_t *altanims[10];
dmiptexlump_t *m;
if (!l->filelen)
{
loadmodel->textures = NULL;
return;
}
m = (dmiptexlump_t *)(mod_base + l->fileofs);
m->nummiptex = LittleLong (m->nummiptex);
loadmodel->numtextures = m->nummiptex;
loadmodel->textures = Hunk_AllocName (m->nummiptex * sizeof(*loadmodel->textures) , loadname);
for (i=0 ; i<m->nummiptex ; i++)
{
m->dataofs[i] = LittleLong(m->dataofs[i]);
if (m->dataofs[i] == -1)
continue;
mt = (miptex_t *)((byte *)m + m->dataofs[i]);
mt->width = LittleLong (mt->width);
mt->height = LittleLong (mt->height);
for (j=0 ; j<MIPLEVELS ; j++)
mt->offsets[j] = LittleLong (mt->offsets[j]);
if ( (mt->width & 15) || (mt->height & 15) )
Sys_Error ("Texture %s is not 16 aligned", mt->name);
pixels = mt->width*mt->height/64*85;
tx = Hunk_AllocName (sizeof(texture_t) +pixels, loadname );
loadmodel->textures[i] = tx;
memcpy (tx->name, mt->name, sizeof(tx->name));
tx->width = mt->width;
tx->height = mt->height;
for (j=0 ; j<MIPLEVELS ; j++)
tx->offsets[j] = mt->offsets[j] + sizeof(texture_t) - sizeof(miptex_t);
// the pixels immediately follow the structures
memcpy ( tx+1, mt+1, pixels);
if (!Q_strncmp(mt->name,"sky",3))
R_InitSky (tx);
}
//
// sequence the animations
//
for (i=0 ; i<m->nummiptex ; i++)
{
tx = loadmodel->textures[i];
if (!tx || tx->name[0] != '+')
continue;
if (tx->anim_next)
continue; // allready sequenced
// find the number of frames in the animation
memset (anims, 0, sizeof(anims));
memset (altanims, 0, sizeof(altanims));
max = tx->name[1];
altmax = 0;
if (max >= 'a' && max <= 'z')
max -= 'a' - 'A';
if (max >= '0' && max <= '9')
{
max -= '0';
altmax = 0;
anims[max] = tx;
max++;
}
else if (max >= 'A' && max <= 'J')
{
altmax = max - 'A';
max = 0;
altanims[altmax] = tx;
altmax++;
}
else
Sys_Error ("Bad animating texture %s", tx->name);
for (j=i+1 ; j<m->nummiptex ; j++)
{
tx2 = loadmodel->textures[j];
if (!tx2 || tx2->name[0] != '+')
continue;
if (strcmp (tx2->name+2, tx->name+2))
continue;
num = tx2->name[1];
if (num >= 'a' && num <= 'z')
num -= 'a' - 'A';
if (num >= '0' && num <= '9')
{
num -= '0';
anims[num] = tx2;
if (num+1 > max)
max = num + 1;
}
else if (num >= 'A' && num <= 'J')
{
num = num - 'A';
altanims[num] = tx2;
if (num+1 > altmax)
altmax = num+1;
}
else
Sys_Error ("Bad animating texture %s", tx->name);
}
#define ANIM_CYCLE 2
// link them all together
for (j=0 ; j<max ; j++)
{
tx2 = anims[j];
if (!tx2)
Sys_Error ("Missing frame %i of %s",j, tx->name);
tx2->anim_total = max * ANIM_CYCLE;
tx2->anim_min = j * ANIM_CYCLE;
tx2->anim_max = (j+1) * ANIM_CYCLE;
tx2->anim_next = anims[ (j+1)%max ];
if (altmax)
tx2->alternate_anims = altanims[0];
}
for (j=0 ; j<altmax ; j++)
{
tx2 = altanims[j];
if (!tx2)
Sys_Error ("Missing frame %i of %s",j, tx->name);
tx2->anim_total = altmax * ANIM_CYCLE;
tx2->anim_min = j * ANIM_CYCLE;
tx2->anim_max = (j+1) * ANIM_CYCLE;
tx2->anim_next = altanims[ (j+1)%altmax ];
if (max)
tx2->alternate_anims = anims[0];
}
}
}
/*
=================
Mod_LoadLighting
=================
*/
void Mod_LoadLighting (lump_t *l)
{
if (!l->filelen)
{
loadmodel->lightdata = NULL;
return;
}
loadmodel->lightdata = Hunk_AllocName ( l->filelen, loadname);
memcpy (loadmodel->lightdata, mod_base + l->fileofs, l->filelen);
}
/*
=================
Mod_LoadVisibility
=================
*/
void Mod_LoadVisibility (lump_t *l)
{
if (!l->filelen)
{
loadmodel->visdata = NULL;
return;
}
loadmodel->visdata = Hunk_AllocName ( l->filelen, loadname);
memcpy (loadmodel->visdata, mod_base + l->fileofs, l->filelen);
}
/*
=================
Mod_LoadEntities
=================
*/
void Mod_LoadEntities (lump_t *l)
{
if (!l->filelen)
{
loadmodel->entities = NULL;
return;
}
loadmodel->entities = Hunk_AllocName ( l->filelen, loadname);
memcpy (loadmodel->entities, mod_base + l->fileofs, l->filelen);
}
/*
=================
Mod_LoadVertexes
=================
*/
void Mod_LoadVertexes (lump_t *l)
{
dvertex_t *in;
mvertex_t *out;
int i, count;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->vertexes = out;
loadmodel->numvertexes = count;
for ( i=0 ; i<count ; i++, in++, out++)
{
out->position[0] = LittleFloat (in->point[0]);
out->position[1] = LittleFloat (in->point[1]);
out->position[2] = LittleFloat (in->point[2]);
out->position[3] = LittleFloat (in->point[3]);
}
}
/*
=================
Mod_LoadSubmodels
=================
*/
void Mod_LoadSubmodels (lump_t *l)
{
dmodel_t *in;
dmodel_t *out;
int i, j, count;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->submodels = out;
loadmodel->numsubmodels = count;
for ( i=0 ; i<count ; i++, in++, out++)
{
for (j=0 ; j<3 ; j++)
{ // spread the mins / maxs by a pixel
out->mins[j] = LittleFloat (in->mins[j]) - 1;
out->maxs[j] = LittleFloat (in->maxs[j]) + 1;
out->origin[j] = LittleFloat (in->origin[j]);
}
for (j=0 ; j<MAX_MAP_HULLS ; j++)
out->headnode[j] = LittleLong (in->headnode[j]);
out->visleafs = LittleLong (in->visleafs);
out->firstface = LittleLong (in->firstface);
out->numfaces = LittleLong (in->numfaces);
}
}
/*
=================
Mod_LoadEdges
=================
*/
void Mod_LoadEdges (lump_t *l)
{
dedge_t *in;
medge_t *out;
int i, count;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( (count + 1) * sizeof(*out), loadname);
loadmodel->edges = out;
loadmodel->numedges = count;
for ( i=0 ; i<count ; i++, in++, out++)
{
out->v[0] = (unsigned short)LittleShort(in->v[0]);
out->v[1] = (unsigned short)LittleShort(in->v[1]);
}
}
/*
=================
Mod_LoadTexinfo
=================
*/
void Mod_LoadTexinfo (lump_t *l)
{
texinfo_t *in;
mtexinfo_t *out;
int i, j, count;
int miptex;
float len1, len2;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->texinfo = out;
loadmodel->numtexinfo = count;
for ( i=0 ; i<count ; i++, in++, out++)
{
for (j=0 ; j<8 ; j++)
out->vecs[0][j] = LittleFloat (in->vecs[0][j]);
len1 = Length (out->vecs[0]);
len2 = Length (out->vecs[1]);
len1 = (len1 + len2)/2;
if (len1 < 0.32)
out->mipadjust = 4;
else if (len1 < 0.49)
out->mipadjust = 3;
else if (len1 < 0.99)
out->mipadjust = 2;
else
out->mipadjust = 1;
#if 0
if (len1 + len2 < 0.001)
out->mipadjust = 1; // don't crash
else
out->mipadjust = 1 / floorf( (len1+len2)/2 + 0.1 );
#endif
miptex = LittleLong (in->miptex);
out->flags = LittleLong (in->flags);
if (!loadmodel->textures)
{
out->texture = r_notexture_mip; // checkerboard texture
out->flags = 0;
}
else
{
if (miptex >= loadmodel->numtextures)
Sys_Error ("miptex >= loadmodel->numtextures");
out->texture = loadmodel->textures[miptex];
if (!out->texture)
{
out->texture = r_notexture_mip; // texture not found
out->flags = 0;
}
}
}
}
/*
================
CalcSurfaceExtents
Fills in s->texturemins[] and s->extents[]
================
*/
void CalcSurfaceExtents (msurface_t *s)
{
float mins[2], maxs[2], val;
int i,j, e;
mvertex_t *v;
mtexinfo_t *tex;
int bmins[2], bmaxs[2];
mins[0] = mins[1] = 999999;
maxs[0] = maxs[1] = -99999;
tex = s->texinfo;
for (i=0 ; i<s->numedges ; i++)
{
e = loadmodel->surfedges[s->firstedge+i];
if (e >= 0)
v = &loadmodel->vertexes[loadmodel->edges[e].v[0]];
else
v = &loadmodel->vertexes[loadmodel->edges[-e].v[1]];
for (j=0 ; j<2 ; j++)
{
val = v->position[0] * tex->vecs[j][0] +
v->position[1] * tex->vecs[j][1] +
v->position[2] * tex->vecs[j][2] +
tex->vecs[j][3];
if (val < mins[j])
mins[j] = val;
if (val > maxs[j])
maxs[j] = val;
}
}
for (i=0 ; i<2 ; i++)
{
bmins[i] = floorf(mins[i]/16);
bmaxs[i] = ceilf(maxs[i]/16);
s->texturemins[i] = bmins[i] * 16;
s->extents[i] = (bmaxs[i] - bmins[i]) * 16;
if ( !(tex->flags & TEX_SPECIAL) && s->extents[i] > 256)
Sys_Error ("Bad surface extents");
}
}
/*
=================
Mod_LoadFaces
=================
*/
void Mod_LoadFaces (lump_t *l)
{
dface_t *in;
msurface_t *out;
int i, count, surfnum;
int planenum, side;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->surfaces = out;
loadmodel->numsurfaces = count;
for ( surfnum=0 ; surfnum<count ; surfnum++, in++, out++)
{
out->firstedge = LittleLong(in->firstedge);
out->numedges = LittleShort(in->numedges);
out->flags = 0;
planenum = LittleShort(in->planenum);
side = LittleShort(in->side);
if (side)
out->flags |= SURF_PLANEBACK;
out->plane = loadmodel->planes + planenum;
out->texinfo = loadmodel->texinfo + LittleShort (in->texinfo);
CalcSurfaceExtents (out);
// lighting info
for (i=0 ; i<MAXLIGHTMAPS ; i++)
out->styles[i] = in->styles[i];
i = LittleLong(in->lightofs);
if (i == -1)
out->samples = NULL;
else
out->samples = loadmodel->lightdata + i;
// set the drawing flags flag
if (!Q_strncmp(out->texinfo->texture->name,"sky",3)) // sky
{
out->flags |= (SURF_DRAWSKY | SURF_DRAWTILED);
continue;
}
if (!Q_strncmp(out->texinfo->texture->name,"*",1)) // turbulent
{
out->flags |= (SURF_DRAWTURB | SURF_DRAWTILED);
for (i=0 ; i<2 ; i++)
{
out->extents[i] = 16384;
out->texturemins[i] = -8192;
}
continue;
}
}
}
/*
=================
Mod_SetParent
=================
*/
void Mod_SetParent (mnode_t *node, mnode_t *parent)
{
node->parent = parent;
if (node->contents < 0)
return;
Mod_SetParent (node->children[0], node);
Mod_SetParent (node->children[1], node);
}
/*
=================
Mod_LoadNodes
=================
*/
void Mod_LoadNodes (lump_t *l)
{
int i, j, count, p;
dnode_t *in;
mnode_t *out;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->nodes = out;
loadmodel->numnodes = count;
for ( i=0 ; i<count ; i++, in++, out++)
{
for (j=0 ; j<3 ; j++)
{
out->minmaxs[j] = LittleShort (in->mins[j]);
out->minmaxs[3+j] = LittleShort (in->maxs[j]);
}
p = LittleLong(in->planenum);
out->plane = loadmodel->planes + p;
out->firstsurface = LittleShort (in->firstface);
out->numsurfaces = LittleShort (in->numfaces);
for (j=0 ; j<2 ; j++)
{
p = LittleShort (in->children[j]);
if (p >= 0)
out->children[j] = loadmodel->nodes + p;
else
out->children[j] = (mnode_t *)(loadmodel->leafs + (-1 - p));
}
}
Mod_SetParent (loadmodel->nodes, NULL); // sets nodes and leafs
}
/*
=================
Mod_LoadLeafs
=================
*/
void Mod_LoadLeafs (lump_t *l)
{
dleaf_t *in;
mleaf_t *out;
int i, j, count, p;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->leafs = out;
loadmodel->numleafs = count;
for ( i=0 ; i<count ; i++, in++, out++)
{
for (j=0 ; j<3 ; j++)
{
out->minmaxs[j] = LittleShort (in->mins[j]);
out->minmaxs[3+j] = LittleShort (in->maxs[j]);
}
p = LittleLong(in->contents);
out->contents = p;
out->firstmarksurface = loadmodel->marksurfaces +
LittleShort(in->firstmarksurface);
out->nummarksurfaces = LittleShort(in->nummarksurfaces);
p = LittleLong(in->visofs);
if (p == -1)
out->compressed_vis = NULL;
else
out->compressed_vis = loadmodel->visdata + p;
out->efrags = NULL;
for (j=0 ; j<4 ; j++)
out->ambient_sound_level[j] = in->ambient_level[j];
}
}
/*
=================
Mod_LoadClipnodes
=================
*/
void Mod_LoadClipnodes (lump_t *l)
{
dclipnode_t *in, *out;
int i, count;
hull_t *hull;
in = (void *)(mod_base + l->fileofs);
if (l->filelen % sizeof(*in))
Sys_Error ("MOD_LoadBmodel: funny lump size in %s",loadmodel->name);
count = l->filelen / sizeof(*in);
out = Hunk_AllocName ( count*sizeof(*out), loadname);
loadmodel->clipnodes = out;
loadmodel->numclipnodes = count;
hull = &loadmodel->hulls[1];
hull->clipnodes = out;
hull->firstclipnode = 0;
hull->lastclipnode = count-1;
hull->planes = loadmodel->planes;
hull->clip_mins[0] = -16;
hull->clip_mins[1] = -16;
hull->clip_mins[2] = -24;
hull->clip_maxs[0] = 16;
hull->clip_maxs[1] = 16;
hull->clip_maxs[2] = 32;
hull = &loadmodel->hulls[2];
hull->clipnodes = out;
hull->firstclipnode = 0;
hull->lastclipnode = count-1;
hull->planes = loadmodel->planes;
hull->clip_mins[0] = -32;
hull->clip_mins[1] = -32;
hull->clip_mins[2] = -24;
hull->clip_maxs[0] = 32;
hull->clip_maxs[1] = 32;
hull->clip_maxs[2] = 64;
hull = &loadmodel->hulls[3];
hull->clipnodes = out;
hull->firstclipnode = 0;
hull->lastclipnode = count-1;
hull->planes = loadmodel->planes;
hull->clip_mins[0] = -12;
hull->clip_mins[1] = -12;
hull->clip_mins[2] = -32;
hull->clip_maxs[0] = 12;
hull->clip_maxs[1] = 12;
hull->clip_maxs[2] = 12;
for (i=0 ; i<count ; i++, out++, in++)
{
out->planenum = LittleLong(in->planenum);
out->children[0] = LittleShort(in->children[0]);
out->children[1] = LittleShort(in->children[1]);