/*
 * model.c -- model loading and caching
 * models are the only shared resource between a client and server
 * running on the same machine.
 * $Id: model.c 5171 2013-03-10 12:00:17Z sezero $
 *
 * Copyright (C) 1996-1997  Id Software, Inc.
 * Copyright (C) 1997-1998  Raven Software Corp.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "quakedef.h"
#include "hwal.h"
#include "r_local.h"

qmodel_t	*loadmodel;
static char	loadname[MAX_QPATH];	// for hunk tags

static qmodel_t *Mod_LoadModel (qmodel_t *mod, qboolean crash);
static void Mod_LoadSpriteModel (qmodel_t *mod, void *buffer);
static void Mod_LoadBrushModel (qmodel_t *mod, void *buffer);
static void Mod_LoadAliasModel (qmodel_t *mod, void *buffer);
static void Mod_LoadAliasModelNew (qmodel_t *mod, void *buffer);

static void Mod_Print (void);

static cvar_t	external_ents = {"external_ents", "1", CVAR_ARCHIVE};

static byte	mod_novis[MAX_MAP_LEAFS/8];

#define	MAX_MOD_KNOWN	2048
static qmodel_t	mod_known[MAX_MOD_KNOWN];
static int	mod_numknown;

static vec3_t	aliasmins, aliasmaxs;


/*
===============
Mod_Init
===============
*/
void Mod_Init (void)
{
	Cvar_RegisterVariable (&external_ents);
	Cmd_AddCommand ("mcache", Mod_Print);

	memset (mod_novis, 0xff, sizeof(mod_novis));
}

/*
===============
Mod_Extradata

Caches the data if needed
===============
*/
void *Mod_Extradata (qmodel_t *mod)
{
	void	*r;

	r = Cache_Check (&mod->cache);
	if (r)
		return r;

	Mod_LoadModel (mod, true);

	if (!mod->cache.data)
		Sys_Error ("%s: caching failed", __thisfunc__);
	return mod->cache.data;
}

/*
===============
Mod_PointInLeaf
===============
*/
mleaf_t *Mod_PointInLeaf (vec3_t p, qmodel_t *model)
{
	mnode_t		*node;
	float		d;
	mplane_t	*plane;

	if (!model)
		Sys_Error ("%s: NULL model", __thisfunc__);
	if (!model->nodes)
		Sys_Error ("%s: model w/o nodes : %s", __thisfunc__, model->name);

	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
===================
*/
static byte *Mod_DecompressVis (byte *in, qmodel_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, qmodel_t *model)
{
	if (leaf == model->leafs)
		return mod_novis;
	return Mod_DecompressVis (leaf->compressed_vis, model);
}

/*
===================
Mod_ClearAll
===================
*/
void Mod_ClearAll (void)
{
	int		i;
	qmodel_t	*mod;

	for (i = 0, mod = mod_known; i < mod_numknown; i++, mod++)
	{
		mod->needload = NL_UNREFERENCED;
	}
}

/*
==================
Mod_FindName

==================
*/
qmodel_t *Mod_FindName (const char *name)
{
	int		i;
	qmodel_t	*mod;
	qmodel_t	*avail = NULL;

	if (!name[0])
		Sys_Error ("%s: NULL name", __thisfunc__);

//
// 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 if (mod->type == mod_sprite)
					mod->cache.data = NULL;
			}
			else
				Sys_Error ("mod_numknown == MAX_MOD_KNOWN");
		}
		else
			mod_numknown++;
		q_strlcpy (mod->name, name, MAX_QPATH);
		mod->needload = NL_NEEDS_LOADED;
	}

	return mod;
}

/*
==================
Mod_TouchModel

==================
*/
void Mod_TouchModel (const char *name)
{
	qmodel_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
==================
*/
static qmodel_t *Mod_LoadModel (qmodel_t *mod, qboolean crash)
{
	byte	*buf;
	byte	stackbuf[1024];		// avoid dirtying the cache heap
	int	mod_type;

	if (mod->type == mod_alias)
	{
		if (Cache_Check(&mod->cache))
		{
			mod->needload = NL_PRESENT;
			return mod;
		}
	}
	else if (mod->needload == NL_PRESENT)
	{
		return mod;
	}

//
// load the file
//
	buf = FS_LoadStackFile (mod->name, stackbuf, sizeof(stackbuf), & mod->path_id);
	if (!buf)
	{
		if (crash)
			Sys_Error ("%s: %s not found", __thisfunc__, mod->name);
		return NULL;
	}

//
// allocate a new model
//
	COM_FileBase (mod->name, loadname, sizeof(loadname));

	loadmodel = mod;

//
// fill it in
//

// call the apropriate loader
	mod->needload = NL_PRESENT;
	mod_type = (buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24));
	switch (mod_type)
	{
	case RAPOLYHEADER:
		Mod_LoadAliasModelNew (mod, buf);
		break;
	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
==================
*/
qmodel_t *Mod_ForName (const char *name, qboolean crash)
{
	qmodel_t	*mod;

	mod = Mod_FindName (name);

	return Mod_LoadModel (mod, crash);
}


/*
===============================================================================

					BRUSHMODEL LOADING

===============================================================================
*/

static byte	*mod_base;


/*
=================
Mod_LoadTextures
=================
*/
static void Mod_LoadTextures (lump_t *l)
{
	int		i, j, pixels, num, maxanim, altmax;
	miptex_t	*mt;
	texture_t	*tx, *tx2;
	texture_t	*anims[10];
	texture_t	*altanims[10];
	dmiptexlump_t *m;
	// external WAL texture loading
	char		texname[MAX_QPATH];
	int		mark;
	miptex_wal_t	*mt_wal;

	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 = (texture_t **) Hunk_AllocName (m->nummiptex * sizeof(*loadmodel->textures), "texture");

	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 (!r_texture_external.integer)
			goto bsp_tex_internal;
		// try an external wal texture file first
		q_snprintf (texname, sizeof(texname), "textures/%s.wal", mt->name);
		if (texname[sizeof(WAL_EXT_DIRNAME)] == '*')
			texname[sizeof(WAL_EXT_DIRNAME)] = WAL_REPLACE_ASTERIX;
		mark = Hunk_LowMark ();
		mt_wal = (miptex_wal_t *)FS_LoadHunkFile(texname, NULL);
		if (mt_wal != NULL)
		{
			mt_wal->ident = LittleLong (mt_wal->ident);
			mt_wal->version = LittleLong (mt_wal->version);
			if (mt_wal->ident == IDWALHEADER && mt_wal->version == WALVERSION)
			{
				mt_wal->width = LittleLong (mt_wal->width);
				mt_wal->height = LittleLong (mt_wal->height);
				for (j = 0; j < MIPLEVELS; j++)
					mt_wal->offsets[j] = LittleLong (mt_wal->offsets[j]);
				if ( (mt_wal->width & 15) || (mt_wal->height & 15) )
				{
					Hunk_FreeToLowMark (mark);
					Sys_Printf ("Texture %s is not 16 aligned", texname);
					goto bsp_tex_internal;
				}

				pixels = mt_wal->width*mt_wal->height/64*85;
				tx = (texture_t *) Hunk_AllocName (sizeof(texture_t) +pixels, "texture");
				loadmodel->textures[i] = tx;

				memcpy (tx->name, mt_wal->name, sizeof(tx->name));

				tx->width = mt_wal->width;
				tx->height = mt_wal->height;
				for (j = 0; j < MIPLEVELS; j++)
					tx->offsets[j] = mt_wal->offsets[j] + sizeof(texture_t) - sizeof(miptex_wal_t);
				// the pixels immediately follow the structures
				memcpy (tx+1, mt_wal+1, pixels);
			}
			else
			{
				if (mt_wal->ident != IDWALHEADER)
					Sys_Printf ("%s: %s is not a valid WAL file\n", __thisfunc__, texname);
				if (mt_wal->version != WALVERSION)
					Sys_Printf ("%s: WAL file %s has unsupported version (%d)\n", __thisfunc__, texname, mt_wal->version);
				Hunk_FreeToLowMark (mark);
				goto bsp_tex_internal;
			}
		}
		else
		{	// load internal bsp pixel data
bsp_tex_internal:
			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 = (texture_t *) Hunk_AllocName (sizeof(texture_t) +pixels, "texture" );
			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 (!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;	// already sequenced

	// find the number of frames in the animation
		memset (anims, 0, sizeof(anims));
		memset (altanims, 0, sizeof(altanims));

		maxanim = tx->name[1];
		altmax = 0;
		if (maxanim >= 'a' && maxanim <= 'z')
			maxanim -= 'a' - 'A';
		if (maxanim >= '0' && maxanim <= '9')
		{
			maxanim -= '0';
			altmax = 0;
			anims[maxanim] = tx;
			maxanim++;
		}
		else if (maxanim >= 'A' && maxanim <= 'J')
		{
			altmax = maxanim - 'A';
			maxanim = 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 > maxanim)
					maxanim = 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 < maxanim; j++)
		{
			tx2 = anims[j];
			if (!tx2)
				Sys_Error ("Missing frame %i of %s",j, tx->name);
			tx2->anim_total = maxanim * ANIM_CYCLE;
			tx2->anim_min = j * ANIM_CYCLE;
			tx2->anim_max = (j+1) * ANIM_CYCLE;
			tx2->anim_next = anims[ (j+1)%maxanim ];
			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 (maxanim)
				tx2->alternate_anims = anims[0];
		}
	}
}

/*
=================
Mod_LoadLighting
=================
*/
static void Mod_LoadLighting (lump_t *l)
{
	if (!l->filelen)
	{
		loadmodel->lightdata = NULL;
		return;
	}
	loadmodel->lightdata = (byte *) Hunk_AllocName ( l->filelen, "light");
	memcpy (loadmodel->lightdata, mod_base + l->fileofs, l->filelen);
}


/*
=================
Mod_LoadVisibility
=================
*/
static void Mod_LoadVisibility (lump_t *l)
{
	if (!l->filelen)
	{
		loadmodel->visdata = NULL;
		return;
	}
	loadmodel->visdata = (byte *) Hunk_AllocName ( l->filelen, "vis");
	memcpy (loadmodel->visdata, mod_base + l->fileofs, l->filelen);
}


/*
=================
Mod_LoadEntities
=================
*/
static void Mod_LoadEntities (lump_t *l)
{
	char	entfilename[MAX_QPATH];
	char		*ents;
	int		mark;
	unsigned int	path_id;

	if (! external_ents.integer)
		goto _load_embedded;

	q_strlcpy(entfilename, loadmodel->name, sizeof(entfilename));
	COM_StripExtension(entfilename, entfilename, sizeof(entfilename));
	q_strlcat(entfilename, ".ent", sizeof(entfilename));
	Con_DPrintf("trying to load %s\n", entfilename);
	mark = Hunk_LowMark();
	ents = (char *) FS_LoadHunkFile (entfilename, &path_id);
	if (ents)
	{
		// use ent file only from the same gamedir as the map
		// itself or from a searchpath with higher priority.
		if (path_id < loadmodel->path_id)
		{
			Hunk_FreeToLowMark(mark);
			Con_DPrintf("ignored %s from a gamedir with lower priority\n", entfilename);
		}
		else
		{
			loadmodel->entities = ents;
			Con_DPrintf("Loaded external entity file %s\n", entfilename);
			return;
		}
	}

_load_embedded:
	if (!l->filelen)
	{
		loadmodel->entities = NULL;
		return;
	}
	loadmodel->entities = (char *) Hunk_AllocName ( l->filelen, "entities");
	memcpy (loadmodel->entities, mod_base + l->fileofs, l->filelen);
}


/*
=================
Mod_LoadVertexes
=================
*/
static void Mod_LoadVertexes (lump_t *l)
{
	dvertex_t	*in;
	mvertex_t	*out;
	int			i, count;

	in = (dvertex_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (mvertex_t *) Hunk_AllocName (count * sizeof(*out), "vertexes");

	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]);
	}
}

/*
=================
Mod_LoadSubmodels
=================
*/
static void Mod_LoadSubmodels (lump_t *l)
{
	dmodel_t	*in;
	dmodel_t	*out;
	int			i, j, count;

	in = (dmodel_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (dmodel_t *) Hunk_AllocName (count * sizeof(*out), "submodels");

	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
=================
*/
static void Mod_LoadEdges (lump_t *l)
{
	dedge_t *in;
	medge_t *out;
	int	i, count;

	in = (dedge_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (medge_t *) Hunk_AllocName ((count + 1) * sizeof(*out), "edges");

	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
=================
*/
static void Mod_LoadTexinfo (lump_t *l)
{
	texinfo_t *in;
	mtexinfo_t *out;
	int	i, j, count;
	int		miptex;
	float	len1, len2;

	in = (texinfo_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (mtexinfo_t *) Hunk_AllocName (count * sizeof(*out), "texture");

	loadmodel->texinfo = out;
	loadmodel->numtexinfo = count;

	for (i = 0; i < count; i++, in++, out++)
	{
		for (j = 0; j < 4; j++)
		{
			out->vecs[0][j] = LittleFloat (in->vecs[0][j]);
			out->vecs[1][j] = LittleFloat (in->vecs[1][j]);
		}
		len1 = VectorLength (out->vecs[0]);
		len2 = VectorLength (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 / floor( (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[]
================
*/
static 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] = (int) floor(mins[i]/16);
		bmaxs[i] = (int) ceil(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
=================
*/
static void Mod_LoadFaces (lump_t *l)
{
	dface_t		*in;
	msurface_t	*out;
	int			i, count, surfnum;
	int			planenum, side;

	in = (dface_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (msurface_t *) Hunk_AllocName (count * sizeof(*out), "faces");

	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 (!strncmp(out->texinfo->texture->name,"sky",3))	// sky
		{
			out->flags |= (SURF_DRAWSKY | SURF_DRAWTILED);
			continue;
		}

		if (out->texinfo->texture->name[0] == '*')		// turbulent
		{
			if (!strncmp(out->texinfo->texture->name, "*BLACK", 6))
			{
				out->flags |= (SURF_DRAWTILED | SURF_DRAWBLACK);
				continue;
			}
			out->flags |= (SURF_DRAWTURB | SURF_DRAWTILED);
			for (i = 0; i < 2; i++)
			{
				out->extents[i] = 16384;
				out->texturemins[i] = -8192;
			}

			if ( (!q_strncasecmp(out->texinfo->texture->name,"*rtex078",8)) ||
					(!q_strncasecmp(out->texinfo->texture->name,"*lowlight",9)) )
				out->flags |= SURF_TRANSLUCENT;

			continue;
		}
	}
}


/*
=================
Mod_SetParent
=================
*/
static 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
=================
*/
static void Mod_LoadNodes (lump_t *l)
{
	int			i, j, count, p;
	dnode_t		*in;
	mnode_t		*out;

	in = (dnode_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (mnode_t *) Hunk_AllocName (count * sizeof(*out), "nodes");

	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
=================
*/
static void Mod_LoadLeafs (lump_t *l)
{
	dleaf_t		*in;
	mleaf_t		*out;
	int			i, j, count, p;

	in = (dleaf_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (mleaf_t *) Hunk_AllocName (count * sizeof(*out), "leafs");

	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
=================
*/
static void Mod_LoadClipnodes (lump_t *l)
{
	dclipnode_t	*in, *out;
	int			i, count;
	hull_t		*hull;

	in = (dclipnode_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (dclipnode_t *) Hunk_AllocName (count * sizeof(*out), "clipnodes");

	loadmodel->clipnodes = out;
	loadmodel->numclipnodes = count;

//player
	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;

//scorpion
	hull = &loadmodel->hulls[2];
	hull->clipnodes = out;
	hull->firstclipnode = 0;
	hull->lastclipnode = count-1;
	hull->planes = loadmodel->planes;
	hull->clip_mins[0] = -24;
	hull->clip_mins[1] = -24;
	hull->clip_mins[2] = -20;
	hull->clip_maxs[0] = 24;
	hull->clip_maxs[1] = 24;
	hull->clip_maxs[2] = 20;

//crouch
	hull = &loadmodel->hulls[3];
	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] = -12;
	hull->clip_maxs[0] = 16;
	hull->clip_maxs[1] = 16;
	hull->clip_maxs[2] = 16;

//hydra -changing in MP to '-8 -8 -8', '8 8 8' for pentacles
	hull = &loadmodel->hulls[4];
	hull->clipnodes = out;
	hull->firstclipnode = 0;
	hull->lastclipnode = count-1;
	hull->planes = loadmodel->planes;
#if 1
	hull->clip_mins[0] = -40;
	hull->clip_mins[1] = -40;
	hull->clip_mins[2] = -42;
	hull->clip_maxs[0] = 40;
	hull->clip_maxs[1] = 40;
	hull->clip_maxs[2] = 42;
#else
	hull->clip_mins[0] = -8;
	hull->clip_mins[1] = -8;
	hull->clip_mins[2] = -8;
	hull->clip_maxs[0] = 8;
	hull->clip_maxs[1] = 8;
	hull->clip_maxs[2] = 8;
#endif

//golem - maybe change to '-28 -28 -40', '28 28 40' for Yakman
	hull = &loadmodel->hulls[5];
	hull->clipnodes = out;
	hull->firstclipnode = 0;
	hull->lastclipnode = count-1;
	hull->planes = loadmodel->planes;
#if 0	//use yak sizes
	hull->clip_mins[0] = -28;
	hull->clip_mins[1] = -28;
	hull->clip_mins[2] = -40;
	hull->clip_maxs[0] = 28;
	hull->clip_maxs[1] = 28;
	hull->clip_maxs[2] = 40;
#else
	hull->clip_mins[0] = -48;
	hull->clip_mins[1] = -48;
	hull->clip_mins[2] = -50;
	hull->clip_maxs[0] = 48;
	hull->clip_maxs[1] = 48;
	hull->clip_maxs[2] = 50;
#endif

	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]);
	}
}

/*
=================
Mod_MakeHull0

Duplicate the drawing hull structure as a clipping hull
=================
*/
static void Mod_MakeHull0 (void)
{
	mnode_t		*in, *child;
	dclipnode_t	*out;
	int			i, j, count;
	hull_t		*hull;

	hull = &loadmodel->hulls[0];

	in = loadmodel->nodes;
	count = loadmodel->numnodes;
	out = (dclipnode_t *) Hunk_AllocName (count * sizeof(*out), "hull0");

	hull->clipnodes = out;
	hull->firstclipnode = 0;
	hull->lastclipnode = count-1;
	hull->planes = loadmodel->planes;

	for (i = 0; i < count; i++, out++, in++)
	{
		out->planenum = in->plane - loadmodel->planes;
		for (j = 0; j < 2; j++)
		{
			child = in->children[j];
			if (child->contents < 0)
				out->children[j] = child->contents;
			else
				out->children[j] = child - loadmodel->nodes;
		}
	}
}

/*
=================
Mod_LoadMarksurfaces
=================
*/
static void Mod_LoadMarksurfaces (lump_t *l)
{
	int		i, j, count;
	short		*in;
	msurface_t	**out;

	in = (short *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (msurface_t **) Hunk_AllocName (count * sizeof(*out), "marksurfaces");

	loadmodel->marksurfaces = out;
	loadmodel->nummarksurfaces = count;

	for (i = 0; i < count; i++)
	{
		j = LittleShort(in[i]);
		if (j >= loadmodel->numsurfaces)
			Sys_Error ("%s: bad surface number", __thisfunc__);
		out[i] = loadmodel->surfaces + j;
	}
}

/*
=================
Mod_LoadSurfedges
=================
*/
static void Mod_LoadSurfedges (lump_t *l)
{
	int		i, count;
	int		*in, *out;

	in = (int *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (int *) Hunk_AllocName (count * sizeof(*out), "surfedges");

	loadmodel->surfedges = out;
	loadmodel->numsurfedges = count;

	for (i = 0; i < count; i++)
		out[i] = LittleLong (in[i]);
}


/*
=================
Mod_LoadPlanes
=================
*/
static void Mod_LoadPlanes (lump_t *l)
{
	int			i, j;
	mplane_t	*out;
	dplane_t	*in;
	int			count;
	int			bits;

	in = (dplane_t *)(mod_base + l->fileofs);
	if (l->filelen % sizeof(*in))
		Sys_Error ("%s: funny lump size in %s", __thisfunc__, loadmodel->name);
	count = l->filelen / sizeof(*in);
	out = (mplane_t *) Hunk_AllocName (count * 2 * sizeof(*out), "planes");

	loadmodel->planes = out;
	loadmodel->numplanes = count;

	for (i = 0; i < count; i++, in++, out++)
	{
		bits = 0;
		for (j = 0; j < 3; j++)
		{
			out->normal[j] = LittleFloat (in->normal[j]);
			if (out->normal[j] < 0)
				bits |= 1<<j;
		}

		out->dist = LittleFloat (in->dist);
		out->type = LittleLong (in->type);
		out->signbits = bits;
	}
}

/*
=================
RadiusFromBounds
=================
*/
static float RadiusFromBounds (vec3_t mins, vec3_t maxs)
{
	int		i;
	vec3_t	corner;

	for (i = 0; i < 3; i++)
	{
		corner[i] = fabs(mins[i]) > fabs(maxs[i]) ? fabs(mins[i]) : fabs(maxs[i]);
	}

	return VectorLength (corner);
}

/*
=================
Mod_LoadBrushModel
=================
*/
static void Mod_LoadBrushModel (qmodel_t *mod, void *buffer)
{
	int			i, j;
	dheader_t	*header;
	dmodel_t	*bm;

	loadmodel->type = mod_brush;

	header = (dheader_t *)buffer;

	i = LittleLong (header->version);
	if (i != BSPVERSION)
		Sys_Error ("%s: %s has wrong version number (%i should be %i)", __thisfunc__, mod->name, i, BSPVERSION);

// swap all the lumps
	mod_base = (byte *)header;

	for (i = 0; i < (int) sizeof(dheader_t) / 4; i++)
		((int *)header)[i] = LittleLong ( ((int *)header)[i]);

// load into heap

	Mod_LoadVertexes (&header->lumps[LUMP_VERTEXES]);
	Mod_LoadEdges (&header->lumps[LUMP_EDGES]);
	Mod_LoadSurfedges (&header->lumps[LUMP_SURFEDGES]);
	Mod_LoadTextures (&header->lumps[LUMP_TEXTURES]);
	Mod_LoadLighting (&header->lumps[LUMP_LIGHTING]);
	Mod_LoadPlanes (&header->lumps[LUMP_PLANES]);
	Mod_LoadTexinfo (&header->lumps[LUMP_TEXINFO]);
	Mod_LoadFaces (&header->lumps[LUMP_FACES]);
	Mod_LoadMarksurfaces (&header->lumps[LUMP_MARKSURFACES]);
	Mod_LoadVisibility (&header->lumps[LUMP_VISIBILITY]);
	Mod_LoadLeafs (&header->lumps[LUMP_LEAFS]);
	Mod_LoadNodes (&header->lumps[LUMP_NODES]);
	Mod_LoadClipnodes (&header->lumps[LUMP_CLIPNODES]);
	Mod_LoadEntities (&header->lumps[LUMP_ENTITIES]);
	Mod_LoadSubmodels (&header->lumps[LUMP_MODELS]);

	Mod_MakeHull0 ();

	mod->numframes = 2;		// regular and alternate animation

//
// set up the submodels (FIXME: this is confusing)
//
	for (i = 0; i < mod->numsubmodels; i++)
	{
		bm = &mod->submodels[i];

		mod->hulls[0].firstclipnode = bm->headnode[0];
		for (j = 1; j < MAX_MAP_HULLS; j++)
		{
			mod->hulls[j].firstclipnode = bm->headnode[j];
			mod->hulls[j].lastclipnode = mod->numclipnodes-1;
		}

		mod->firstmodelsurface = bm->firstface;
		mod->nummodelsurfaces = bm->numfaces;

		VectorCopy (bm->maxs, mod->maxs);
		VectorCopy (bm->mins, mod->mins);

		mod->radius = RadiusFromBounds (mod->mins, mod->maxs);

		mod->numleafs = bm->visleafs;

		if (i < mod->numsubmodels-1)
		{	// duplicate the basic information
			char	name[10];

			q_snprintf (name, sizeof(name), "*%i", i+1);
			loadmodel = Mod_FindName (name);
			*loadmodel = *mod;
			strcpy (loadmodel->name, name);
			mod = loadmodel;
		}
	}
}

/*
==============================================================================

ALIAS MODELS

==============================================================================
*/

static float	aliastransform2[3][4];

/*
================
R_AliasTransformVector
================
*/
static void R_AliasTransformVector2 (vec3_t in, vec3_t out)
{
	out[0] = DotProduct(in, aliastransform2[0]) + aliastransform2[0][3];
	out[1] = DotProduct(in, aliastransform2[1]) + aliastransform2[1][3];
	out[2] = DotProduct(in, aliastransform2[2]) + aliastransform2[2][3];
}

/*
=================
Mod_LoadAliasFrame
=================
*/
static void *Mod_LoadAliasFrame (void *pin, int *pframeindex, int numv,
	trivertx_t *pbboxmin, trivertx_t *pbboxmax, aliashdr_t *pheader,
	char *name, newmdl_t *pmodel)
{
	trivertx_t	*pframe, *pinframe;
	int		i, j;
	daliasframe_t	*pdaliasframe;
	vec3_t		in, out;

	pdaliasframe = (daliasframe_t *)pin;

	strcpy (name, pdaliasframe->name);

	for (i = 0; i < 3; i++)
	{
	// these are byte values, so we don't have to worry about
	// endianness
		pbboxmin->v[i] = pdaliasframe->bboxmin.v[i];
		pbboxmax->v[i] = pdaliasframe->bboxmax.v[i];
	}

	pinframe = (trivertx_t *)(pdaliasframe + 1);
	pframe = (trivertx_t *) Hunk_AllocName (numv * sizeof(*pframe), loadname);

	*pframeindex = (byte *)pframe - (byte *)pheader;

	aliastransform2[0][0] = pmodel->scale[0];
	aliastransform2[1][1] = pmodel->scale[1];
	aliastransform2[2][2] = pmodel->scale[2];
	aliastransform2[0][3] = pmodel->scale_origin[0];
	aliastransform2[1][3] = pmodel->scale_origin[1];
	aliastransform2[2][3] = pmodel->scale_origin[2];

	for (j = 0; j < numv; j++)
	{
		int		k;

		in[0] = pinframe[j].v[0];
		in[1] = pinframe[j].v[1];
		in[2] = pinframe[j].v[2];
		R_AliasTransformVector2(in, out);

	// these are all byte values, so no need to deal with endianness
		pframe[j].lightnormalindex = pinframe[j].lightnormalindex;

		for (k = 0; k < 3; k++)
		{
			pframe[j].v[k] = pinframe[j].v[k];

			if (aliasmins[k] > out[k])
				aliasmins[k] = out[k];
			if (aliasmaxs[k] < out[k])
				aliasmaxs[k] = out[k];
		}
	}

	pinframe += numv;

	return (void *)pinframe;
}


/*
=================
Mod_LoadAliasGroup
=================
*/
static void *Mod_LoadAliasGroup (void *pin, int *pframeindex, int numv,
	trivertx_t *pbboxmin, trivertx_t *pbboxmax, aliashdr_t *pheader,
	char *name, newmdl_t *pmodel)
{
	daliasgroup_t		*pingroup;
	maliasgroup_t		*paliasgroup;
	int			i, numframes;
	daliasinterval_t	*pin_intervals;
	float			*poutintervals;
	void			*ptemp;

	pingroup = (daliasgroup_t *)pin;

	numframes = LittleLong (pingroup->numframes);

	paliasgroup = (maliasgroup_t *) Hunk_AllocName (sizeof(maliasgroup_t) + (numframes - 1) * sizeof(paliasgroup->frames[0]), loadname);

	paliasgroup->numframes = numframes;

	for (i = 0; i < 3; i++)
	{
	// these are byte values, so we don't have to worry about endianness
		pbboxmin->v[i] = pingroup->bboxmin.v[i];
		pbboxmax->v[i] = pingroup->bboxmax.v[i];
	}

	*pframeindex = (byte *)paliasgroup - (byte *)pheader;

	pin_intervals = (daliasinterval_t *)(pingroup + 1);

	poutintervals = (float *) Hunk_AllocName (numframes * sizeof(float), loadname);

	paliasgroup->intervals = (byte *)poutintervals - (byte *)pheader;

	for (i = 0; i < numframes; i++)
	{
		*poutintervals = LittleFloat (pin_intervals->interval);
		if (*poutintervals <= 0.0)
			Sys_Error ("%s: interval <= 0", __thisfunc__);

		poutintervals++;
		pin_intervals++;
	}

	ptemp = (void *)pin_intervals;

	for (i = 0; i < numframes; i++)
	{
		ptemp = Mod_LoadAliasFrame (ptemp,
						&paliasgroup->frames[i].frame,
						numv,
						&paliasgroup->frames[i].bboxmin,
						&paliasgroup->frames[i].bboxmax,
						pheader, name, pmodel);
	}

	return ptemp;
}


/*
=================
Mod_LoadAliasSkin
=================
*/
static void *Mod_LoadAliasSkin (void *pin, int *pskinindex, int skinsize,
	aliashdr_t *pheader)
{
	int		i;
	byte		*pskin, *pinskin;
	unsigned short	*pusskin;

	pskin = (byte *) Hunk_AllocName (skinsize * r_pixbytes, loadname);
	pinskin = (byte *)pin;
	*pskinindex = (byte *)pskin - (byte *)pheader;

	if (r_pixbytes == 1)
	{
		memcpy (pskin, pinskin, skinsize);
	}
	else if (r_pixbytes == 2)
	{
		pusskin = (unsigned short *)pskin;

		for (i = 0; i < skinsize; i++)
			pusskin[i] = d_8to16table[pinskin[i]];
	}
	else
	{
		Sys_Error ("%s: driver set invalid r_pixbytes: %d", __thisfunc__, r_pixbytes);
	}

	pinskin += skinsize;

	return ((void *)pinskin);
}


/*
=================
Mod_LoadAliasSkinGroup
=================
*/
static void *Mod_LoadAliasSkinGroup (void *pin, int *pskinindex, int skinsize,
	aliashdr_t *pheader)
{
	daliasskingroup_t	*pinskingroup;
	maliasskingroup_t	*paliasskingroup;
	int			i, numskins;
	daliasskininterval_t	*pinskinintervals;
	float			*poutskinintervals;
	void			*ptemp;

	pinskingroup = (daliasskingroup_t *)pin;

	numskins = LittleLong (pinskingroup->numskins);

	paliasskingroup = (maliasskingroup_t *) Hunk_AllocName (sizeof(maliasskingroup_t) + (numskins - 1) * sizeof(paliasskingroup->skindescs[0]), loadname);

	paliasskingroup->numskins = numskins;

	*pskinindex = (byte *)paliasskingroup - (byte *)pheader;

	pinskinintervals = (daliasskininterval_t *)(pinskingroup + 1);

	poutskinintervals = (float *) Hunk_AllocName (numskins * sizeof(float),loadname);

	paliasskingroup->intervals = (byte *)poutskinintervals - (byte *)pheader;

	for (i = 0; i < numskins; i++)
	{
		*poutskinintervals = LittleFloat (pinskinintervals->interval);
		if (*poutskinintervals <= 0)
			Sys_Error ("%s: interval <= 0", __thisfunc__);

		poutskinintervals++;
		pinskinintervals++;
	}

	ptemp = (void *)pinskinintervals;

	for (i = 0; i < numskins; i++)
	{
		ptemp = Mod_LoadAliasSkin (ptemp,
				&paliasskingroup->skindescs[i].skin, skinsize, pheader);
	}

	return ptemp;
}


/*
=================
Mod_LoadAliasModelNew
loads new expanded header format needed to do vert opts
=================
*/
static void Mod_LoadAliasModelNew (qmodel_t *mod, void *buffer)
{
	int			i, j;
	newmdl_t		*pinmodel;
	newmdl_t		*pmodel;
	stvert_t		*pstverts, *pinstverts;
	aliashdr_t		*pheader;
	mtriangle_t		*ptri;
	dnewtriangle_t		*pintriangles;
	int			version, numframes, numskins;
	int			size;
	daliasframetype_t	*pframetype;
	daliasskintype_t	*pskintype;
	maliasskindesc_t	*pskindesc;
	int			skinsize;
	int			start, end, total;

	start = Hunk_LowMark ();

	pinmodel = (newmdl_t *)buffer;

	version = LittleLong (pinmodel->version);
	if (version != ALIAS_NEWVERSION)
		Sys_Error ("%s has wrong version number (%i should be %i)",
				 mod->name, version, ALIAS_NEWVERSION);

//
// allocate space for a working header, plus all the data except the frames,
// skin and group info
//
	size = 	sizeof (aliashdr_t) +
			(LittleLong (pinmodel->numframes) - 1) * sizeof (pheader->frames[0]) +
			sizeof (newmdl_t) +
			LittleLong (pinmodel->num_st_verts) * sizeof (stvert_t) +
			LittleLong (pinmodel->numtris) * sizeof (mtriangle_t);

	pheader = (aliashdr_t *) Hunk_AllocName (size, loadname);
	pmodel = (newmdl_t *) ((byte *)&pheader[1] +
			(LittleLong (pinmodel->numframes) - 1) * sizeof (pheader->frames[0]));

//	mod->cache.data = pheader;
	mod->flags = LittleLong (pinmodel->flags);

//
// endian-adjust and copy the data, starting with the alias model header
//
	pmodel->boundingradius = LittleFloat (pinmodel->boundingradius);
	pmodel->numskins = LittleLong (pinmodel->numskins);
	pmodel->skinwidth = LittleLong (pinmodel->skinwidth);
	pmodel->skinheight = LittleLong (pinmodel->skinheight);

	if (pmodel->skinheight > MAX_SKIN_HEIGHT)
		Sys_Error ("model %s has a skin taller than %d", mod->name, MAX_SKIN_HEIGHT);

	pmodel->numverts = LittleLong (pinmodel->numverts);
	//use the new num
	pmodel->num_st_verts = LittleLong (pinmodel->num_st_verts);

	if (pmodel->numverts <= 0)
		Sys_Error ("model %s has no vertices", mod->name);
	if (pmodel->num_st_verts <= 0)
		Sys_Error ("model %s has no ST vertices", mod->name);
	if (pmodel->numverts > MAXALIASVERTS)
		Sys_Error ("model %s has too many vertices", mod->name);

	pmodel->numtris = LittleLong (pinmodel->numtris);

	if (pmodel->numtris <= 0)
		Sys_Error ("model %s has no triangles", mod->name);

	pmodel->numframes = LittleLong (pinmodel->numframes);
	pmodel->size = LittleFloat (pinmodel->size) * ALIAS_BASE_SIZE_RATIO;
	mod->synctype = (synctype_t) 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]);
	}

	numskins = pmodel->numskins;
	numframes = pmodel->numframes;

	if (pmodel->skinwidth & 0x03)
		Sys_Error ("%s: skinwidth not multiple of 4", __thisfunc__);

	pheader->model = (byte *)pmodel - (byte *)pheader;

//
// load the skins
//
	skinsize = pmodel->skinheight * pmodel->skinwidth;

	if (numskins < 1)
		Sys_Error ("%s: Invalid # of skins: %d", __thisfunc__, numskins);

	pskintype = (daliasskintype_t *)&pinmodel[1];

	pskindesc = (maliasskindesc_t *) Hunk_AllocName (numskins * sizeof(maliasskindesc_t), loadname);

	pheader->skindesc = (byte *)pskindesc - (byte *)pheader;

	for (i = 0; i < numskins; i++)
	{
		aliasskintype_t	skintype;

		skintype = (aliasskintype_t) LittleLong (pskintype->type);
		pskindesc[i].type = skintype;

		if (skintype == ALIAS_SKIN_SINGLE)
		{
			pskintype = (daliasskintype_t *)
					Mod_LoadAliasSkin (pskintype + 1,
								&pskindesc[i].skin,
								skinsize, pheader);
		}
		else
		{
			pskintype = (daliasskintype_t *)
					Mod_LoadAliasSkinGroup (pskintype + 1,
								&pskindesc[i].skin,
								skinsize, pheader);
		}
	}

//
// set base s and t vertices
//
	pstverts = (stvert_t *)&pmodel[1];
	pinstverts = (stvert_t *)pskintype;

	pheader->stverts = (byte *)pstverts - (byte *)pheader;

	//jfm: change for new models (use num_st_verts)
	for (i = 0; i < pmodel->num_st_verts; i++)
	{
		pstverts[i].onseam = LittleLong (pinstverts[i].onseam);
	// put s and t in 16.16 format
		pstverts[i].s = LittleLong (pinstverts[i].s) << 16;
		pstverts[i].t = LittleLong (pinstverts[i].t) << 16;
	}

//
// set up the triangles
//
	//jfm: change for new models (use num_st_verts)
	ptri = (mtriangle_t *)&pstverts[pmodel->num_st_verts];
	pintriangles = (dnewtriangle_t *)&pinstverts[pmodel->num_st_verts];

	pheader->triangles = (byte *)ptri - (byte *)pheader;

	for (i = 0; i < pmodel->numtris; i++)
	{
		ptri[i].facesfront = LittleLong (pintriangles[i].facesfront);

		for (j = 0; j < 3; j++)
		{
			ptri[i].vertindex[j] = LittleShort (pintriangles[i].vertindex[j]);
			ptri[i].stindex[j] = LittleShort (pintriangles[i].stindex[j]);
		}
	}

//
// load the frames
//
	if (numframes < 1)
		Sys_Error ("%s: Invalid # of frames: %d", __thisfunc__, numframes);

	pframetype = (daliasframetype_t *)&pintriangles[pmodel->numtris];

	aliasmins[0] = aliasmins[1] = aliasmins[2] = 32768;
	aliasmaxs[0] = aliasmaxs[1] = aliasmaxs[2] = -32768;

	for (i = 0; i < numframes; i++)
	{
		aliasframetype_t	frametype;

		frametype = (aliasframetype_t) LittleLong (pframetype->type);
		pheader->frames[i].type = frametype;

		if (frametype == ALIAS_SINGLE)
		{
			pframetype = (daliasframetype_t *)
					Mod_LoadAliasFrame (pframetype + 1,
								&pheader->frames[i].frame,
								pmodel->numverts,
								&pheader->frames[i].bboxmin,
								&pheader->frames[i].bboxmax,
								pheader, pheader->frames[i].name,
								pmodel);
		}
		else
		{
			pframetype = (daliasframetype_t *)
					Mod_LoadAliasGroup (pframetype + 1,
								&pheader->frames[i].frame,
								pmodel->numverts,
								&pheader->frames[i].bboxmin,
								&pheader->frames[i].bboxmax,
								pheader, pheader->frames[i].name,
								pmodel);
		}
	}

	mod->type = mod_alias;

// FIXME: do this right
//	mod->mins[0] = mod->mins[1] = mod->mins[2] = -16;
//	mod->maxs[0] = mod->maxs[1] = mod->maxs[2] = 16;
	mod->mins[0] = aliasmins[0];
	mod->mins[1] = aliasmins[1];
	mod->mins[2] = aliasmins[2];
	mod->maxs[0] = aliasmaxs[0];
	mod->maxs[1] = aliasmaxs[1];
	mod->maxs[2] = aliasmaxs[2];
//
// move the complete, relocatable alias model to the cache
//
	end = Hunk_LowMark ();
	total = end - start;

	Cache_Alloc (&mod->cache, total, mod->name);
	if (!mod->cache.data)
		return;
	memcpy (mod->cache.data, pheader, total);

	Hunk_FreeToLowMark (start);
}

/*
=================
Mod_LoadAliasModel
loads old model fmt, converts to new
=================
*/
static void Mod_LoadAliasModel (qmodel_t *mod, void *buffer)
{
	int			i, j;
	mdl_t			*pinmodel;
	newmdl_t		*pmodel;
	stvert_t		*pstverts, *pinstverts;
	aliashdr_t		*pheader;
	mtriangle_t		*ptri;
	dtriangle_t		*pintriangles;
	int			version, numframes, numskins;
	int			size;
	daliasframetype_t	*pframetype;
	daliasskintype_t	*pskintype;
	maliasskindesc_t	*pskindesc;
	int			skinsize;
	int			start, end, total;

/*	// rjr FIXME
	if (!strcmp(loadmodel->name, "models/paladin.mdl"))
	{
		unsigned short	crc;
		byte	*p;
		int		len;
		char	st[40];

		CRC_Init(&crc);
		for (len = fs_filesize, p = (byte *)buffer; len; len--, p++)
			CRC_ProcessByte(&crc, *p);

		q_snprintf (st, sizeof(st), "%d", (int) crc);
	// rjr FIXME
		Info_SetValueForKey (cls.userinfo, "pmodel", st, MAX_INFO_STRING);//"emodel"

	// rjr FIXME
		if (cls.state >= ca_connected)
		{
			MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
			q_snprintf (st, sizeof(st), "setinfo %s %d", "pmodel", (int)crc);//"emodel"
			SZ_Print (&cls.netchan.message, st);
		}
	}
*/
	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);

//
// allocate space for a working header, plus all the data except the frames,
// skin and group info
//
	size = 	sizeof (aliashdr_t) +
			(LittleLong (pinmodel->numframes) - 1) * sizeof (pheader->frames[0]) +
			sizeof (newmdl_t) +
			LittleLong (pinmodel->numverts) * sizeof (stvert_t) +
			LittleLong (pinmodel->numtris) * sizeof (mtriangle_t);

	pheader = (aliashdr_t *) Hunk_AllocName (size, loadname);
	pmodel = (newmdl_t *) ((byte *)&pheader[1] +
			(LittleLong (pinmodel->numframes) - 1) * sizeof (pheader->frames[0]));

//	mod->cache.data = pheader;
	mod->flags = LittleLong (pinmodel->flags);

//
// endian-adjust and copy the data, starting with the alias model header
//
	pmodel->boundingradius = LittleFloat (pinmodel->boundingradius);
	pmodel->numskins = LittleLong (pinmodel->numskins);
	pmodel->skinwidth = LittleLong (pinmodel->skinwidth);
	pmodel->skinheight = LittleLong (pinmodel->skinheight);

	if (pmodel->skinheight > MAX_SKIN_HEIGHT)
		Sys_Error ("model %s has a skin taller than %d", mod->name, MAX_SKIN_HEIGHT);

	pmodel->numverts = LittleLong (pinmodel->numverts);
	pmodel->num_st_verts = LittleLong (pinmodel->numverts);

	if (pmodel->numverts <= 0)
		Sys_Error ("model %s has no vertices", mod->name);
	if (pmodel->numverts > MAXALIASVERTS)
		Sys_Error ("model %s has too many vertices", mod->name);

	pmodel->numtris = LittleLong (pinmodel->numtris);

	if (pmodel->numtris <= 0)
		Sys_Error ("model %s has no triangles", mod->name);

	pmodel->numframes = LittleLong (pinmodel->numframes);
	pmodel->size = LittleFloat (pinmodel->size) * ALIAS_BASE_SIZE_RATIO;
	mod->synctype = (synctype_t) 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]);
	}

	numskins = pmodel->numskins;
	numframes = pmodel->numframes;

	if (pmodel->skinwidth & 0x03)
		Sys_Error ("%s: skinwidth not multiple of 4", __thisfunc__);

	pheader->model = (byte *)pmodel - (byte *)pheader;

//
// load the skins
//
	skinsize = pmodel->skinheight * pmodel->skinwidth;

	if (numskins < 1)
		Sys_Error ("%s: Invalid # of skins: %d", __thisfunc__, numskins);

	pskintype = (daliasskintype_t *)&pinmodel[1];

	pskindesc = (maliasskindesc_t *) Hunk_AllocName (numskins * sizeof(maliasskindesc_t), loadname);

	pheader->skindesc = (byte *)pskindesc - (byte *)pheader;

	for (i = 0; i < numskins; i++)
	{
		aliasskintype_t	skintype;

		skintype = (aliasskintype_t) LittleLong (pskintype->type);
		pskindesc[i].type = skintype;

		if (skintype == ALIAS_SKIN_SINGLE)
		{
			pskintype = (daliasskintype_t *)
					Mod_LoadAliasSkin (pskintype + 1,
								&pskindesc[i].skin,
								skinsize, pheader);
		}
		else
		{
			pskintype = (daliasskintype_t *)
					Mod_LoadAliasSkinGroup (pskintype + 1,
								&pskindesc[i].skin,
								skinsize, pheader);
		}
	}

//
// set base s and t vertices
//
	pstverts = (stvert_t *)&pmodel[1];
	pinstverts = (stvert_t *)pskintype;

	pheader->stverts = (byte *)pstverts - (byte *)pheader;

	//jfm: change for new models (use num_st_verts)
	for (i = 0; i < pmodel->num_st_verts; i++)
	{
		pstverts[i].onseam = LittleLong (pinstverts[i].onseam);
	// put s and t in 16.16 format
		pstverts[i].s = LittleLong (pinstverts[i].s) << 16;
		pstverts[i].t = LittleLong (pinstverts[i].t) << 16;
	}

//
// set up the triangles
//
	//jfm: change for new models (use num_st_verts)
	ptri = (mtriangle_t *)&pstverts[pmodel->num_st_verts];
	pintriangles = (dtriangle_t *)&pinstverts[pmodel->num_st_verts];

	pheader->triangles = (byte *)ptri - (byte *)pheader;

	for (i = 0; i < pmodel->numtris; i++)
	{
		ptri[i].facesfront = LittleLong (pintriangles[i].facesfront);

		for (j = 0; j < 3; j++)
		{
#if 0
			if (pintriangles[i].vertindex[j] > Q_MAXSHORT)
				Sys_Error ("%s: ind too big!", __thisfunc__);
#endif
			ptri[i].vertindex[j] =(short) LittleLong (pintriangles[i].vertindex[j]);
			ptri[i].stindex[j] = ptri[i].vertindex[j];	//MAKE A COPY
		}
	}

//
// load the frames
//
	if (numframes < 1)
		Sys_Error ("%s: Invalid # of frames: %d", __thisfunc__, numframes);

	pframetype = (daliasframetype_t *)&pintriangles[pmodel->numtris];

	aliasmins[0] = aliasmins[1] = aliasmins[2] = 32768;
	aliasmaxs[0] = aliasmaxs[1] = aliasmaxs[2] = -32768;

	for (i = 0; i < numframes; i++)
	{
		aliasframetype_t	frametype;

		frametype = (aliasframetype_t) LittleLong (pframetype->type);
		pheader->frames[i].type = frametype;

		if (frametype == ALIAS_SINGLE)
		{
			pframetype = (daliasframetype_t *)
					Mod_LoadAliasFrame (pframetype + 1,
								&pheader->frames[i].frame,
								pmodel->numverts,
								&pheader->frames[i].bboxmin,
								&pheader->frames[i].bboxmax,
								pheader, pheader->frames[i].name,
								pmodel);
		}
		else
		{
			pframetype = (daliasframetype_t *)
					Mod_LoadAliasGroup (pframetype + 1,
								&pheader->frames[i].frame,
								pmodel->numverts,
								&pheader->frames[i].bboxmin,
								&pheader->frames[i].bboxmax,
								pheader, pheader->frames[i].name,
								pmodel);
		}
	}

	mod->type = mod_alias;

// FIXME: do this right
//	mod->mins[0] = mod->mins[1] = mod->mins[2] = -16;
//	mod->maxs[0] = mod->maxs[1] = mod->maxs[2] = 16;
	mod->mins[0] = aliasmins[0];
	mod->mins[1] = aliasmins[1];
	mod->mins[2] = aliasmins[2];
	mod->maxs[0] = aliasmaxs[0];
	mod->maxs[1] = aliasmaxs[1];
	mod->maxs[2] = aliasmaxs[2];
//
// move the complete, relocatable alias model to the cache
//
	end = Hunk_LowMark ();
	total = end - start;

	Cache_Alloc (&mod->cache, total, mod->name);
	if (!mod->cache.data)
		return;
	memcpy (mod->cache.data, pheader, total);

	Hunk_FreeToLowMark (start);
}

//=============================================================================

/*
=================
Mod_LoadSpriteFrame
=================
*/
static void *Mod_LoadSpriteFrame (void *pin, mspriteframe_t **ppframe)
{
	dspriteframe_t		*pinframe;
	mspriteframe_t		*pspriteframe;
	int			i, width, height, size, origin[2];
	unsigned short		*ppixout;
	byte			*ppixin;

	pinframe = (dspriteframe_t *)pin;

	width = LittleLong (pinframe->width);
	height = LittleLong (pinframe->height);
	size = width * height;

	pspriteframe = (mspriteframe_t *) Hunk_AllocName (sizeof(mspriteframe_t) + size*r_pixbytes, loadname);
	*ppframe = pspriteframe;

	pspriteframe->width = width;
	pspriteframe->height = height;
	origin[0] = LittleLong (pinframe->origin[0]);
	origin[1] = LittleLong (pinframe->origin[1]);

	pspriteframe->up = origin[1];
	pspriteframe->down = origin[1] - height;
	pspriteframe->left = origin[0];
	pspriteframe->right = width + origin[0];

	if (r_pixbytes == 1)
	{
		memcpy (&pspriteframe->pixels[0], (byte *)(pinframe + 1), size);
	}
	else if (r_pixbytes == 2)
	{
		ppixin = (byte *)(pinframe + 1);
		ppixout = (unsigned short *)&pspriteframe->pixels[0];

		for (i = 0; i < size; i++)
			ppixout[i] = d_8to16table[ppixin[i]];
	}
	else
	{
		Sys_Error ("%s: driver set invalid r_pixbytes: %d", __thisfunc__, r_pixbytes);
	}

	return (void *)((byte *)pinframe + sizeof (dspriteframe_t) + size);
}


/*
=================
Mod_LoadSpriteGroup
=================
*/
static void *Mod_LoadSpriteGroup (void *pin, mspriteframe_t **ppframe)
{
	dspritegroup_t		*pingroup;
	mspritegroup_t		*pspritegroup;
	int			i, numframes;
	dspriteinterval_t	*pin_intervals;
	float			*poutintervals;
	void			*ptemp;

	pingroup = (dspritegroup_t *)pin;

	numframes = LittleLong (pingroup->numframes);

	pspritegroup = (mspritegroup_t *) Hunk_AllocName (sizeof(mspritegroup_t) + (numframes - 1) * sizeof(pspritegroup->frames[0]), loadname);

	pspritegroup->numframes = numframes;

	*ppframe = (mspriteframe_t *)pspritegroup;

	pin_intervals = (dspriteinterval_t *)(pingroup + 1);

	poutintervals = (float *) Hunk_AllocName (numframes * sizeof(float), loadname);

	pspritegroup->intervals = poutintervals;

	for (i = 0; i < numframes; i++)
	{
		*poutintervals = LittleFloat (pin_intervals->interval);
		if (*poutintervals <= 0.0)
			Sys_Error ("%s: interval <= 0", __thisfunc__);

		poutintervals++;
		pin_intervals++;
	}

	ptemp = (void *)pin_intervals;

	for (i = 0; i < numframes; i++)
	{
		ptemp = Mod_LoadSpriteFrame (ptemp, &pspritegroup->frames[i]);
	}

	return ptemp;
}


/*
=================
Mod_LoadSpriteModel
=================
*/
static void Mod_LoadSpriteModel (qmodel_t *mod, void *buffer)
{
	int			i;
	int			version;
	dsprite_t		*pin;
	msprite_t		*psprite;
	int			numframes;
	int			size;
	dspriteframetype_t	*pframetype;

	pin = (dsprite_t *)buffer;

	version = LittleLong (pin->version);
	if (version != SPRITE_VERSION)
		Sys_Error ("%s has wrong version number "
				 "(%i should be %i)", mod->name, version, SPRITE_VERSION);

	numframes = LittleLong (pin->numframes);

	size = sizeof (msprite_t) + (numframes - 1) * sizeof (psprite->frames);

	psprite = (msprite_t *) Hunk_AllocName (size, mod->name);

	mod->cache.data = psprite;

	psprite->type = LittleLong (pin->type);
	psprite->maxwidth = LittleLong (pin->width);
	psprite->maxheight = LittleLong (pin->height);
	psprite->beamlength = LittleFloat (pin->beamlength);
	mod->synctype = (synctype_t) LittleLong (pin->synctype);
	psprite->numframes = numframes;

	mod->mins[0] = mod->mins[1] = -psprite->maxwidth/2;
	mod->maxs[0] = mod->maxs[1] = psprite->maxwidth/2;
	mod->mins[2] = -psprite->maxheight/2;
	mod->maxs[2] = psprite->maxheight/2;

//
// load the frames
//
	if (numframes < 1)
		Sys_Error ("%s: Invalid # of frames: %d", __thisfunc__, numframes);

	mod->numframes = numframes;

	pframetype = (dspriteframetype_t *)(pin + 1);

	for (i = 0; i < numframes; i++)
	{
		spriteframetype_t	frametype;

		frametype = (spriteframetype_t) LittleLong (pframetype->type);
		psprite->frames[i].type = frametype;

		if (frametype == SPR_SINGLE)
		{
			pframetype = (dspriteframetype_t *)
					Mod_LoadSpriteFrame (pframetype + 1,
								&psprite->frames[i].frameptr);
		}
		else
		{
			pframetype = (dspriteframetype_t *)
					Mod_LoadSpriteGroup (pframetype + 1,
								&psprite->frames[i].frameptr);
		}
	}

	mod->type = mod_sprite;
}

//=============================================================================

/*
================
Mod_Print
================
*/
#if defined(__GNUC__) && !(defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
#define MOD_Printf(FH, fmt, args...)		\
    do {					\
	if ((FH)) fprintf((FH), fmt, ##args);	\
	else Con_Printf(fmt, ##args);		\
    } while (0)
#else
#define MOD_Printf(FH, ...)			\
    do {					\
	if ((FH)) fprintf((FH), __VA_ARGS__);	\
	else Con_Printf(__VA_ARGS__);		\
    } while (0)
#endif
static void Mod_Print (void)
{
	int		i, counter;
	FILE		*FH = NULL;
	qmodel_t	*mod;

	i = Cmd_Argc();
	for (counter = 1; counter < i; counter++)
	{
		if (q_strcasecmp(Cmd_Argv(counter),"save") == 0)
		{
			FH = fopen(FS_MakePath(FS_USERDIR,NULL,"mcache.txt"), "w");
			break;
		}
	}

	MOD_Printf (FH, "Cached models:\n");
	for (i = 0, mod = mod_known; i < mod_numknown; i++, mod++)
	{
		MOD_Printf (FH, "%4i (%8p): %s", i, mod->cache.data, mod->name);
		if (mod->needload & NL_UNREFERENCED)
			MOD_Printf (FH, " (!R)");
		if (mod->needload & NL_NEEDS_LOADED)
			MOD_Printf (FH, " (!P)");
		MOD_Printf (FH, "\n");
	}
	if (FH)
	{
		fclose(FH);
		Con_Printf ("Wrote to mcache.txt\n");
	}
}

