/*
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.

*/

#ifndef MODEL_ALIAS_H
#define MODEL_ALIAS_H

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

ALIAS MODELS

Alias models are position independent, so the cache manager can move them.
==============================================================================
*/

#include "modelgen.h"

typedef struct daliashdr_s
{
	int			ident;
	int			version;
	vec3_t		scale;
	vec3_t		scale_origin;
	float		boundingradius;
	vec3_t		eyeposition;
	int			numskins;
	int			skinwidth;
	int			skinheight;
	int			numverts;
	int			numtris;
	int			numframes;
	synctype_t	synctype;
	int			flags;
	float		size;
}
daliashdr_t;

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

.MD2 triangle model file format

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

// LordHavoc: grabbed this from the Q2 utility source,
// renamed a things to avoid conflicts

#define MD2ALIAS_VERSION	8
#define	MD2_SKINNAME	64

typedef struct md2stvert_s
{
	short	s;
	short	t;
} md2stvert_t;

typedef struct md2triangle_s
{
	short	index_xyz[3];
	short	index_st[3];
} md2triangle_t;

typedef struct md2frame_s
{
	float		scale[3];	// multiply byte verts by this
	float		translate[3];	// then add this
	char		name[16];	// frame name from grabbing
} md2frame_t;

// the glcmd format:
// a positive integer starts a tristrip command, followed by that many
// vertex structures.
// a negative integer starts a trifan command, followed by -x vertexes
// a zero indicates the end of the command list.
// a vertex consists of a floating point s, a floating point t,
// and an integer vertex index.


typedef struct md2_s
{
	int			ident;
	int			version;

	int			skinwidth;
	int			skinheight;
	int			framesize;		// byte size of each frame

	int			num_skins;
	int			num_xyz;
	int			num_st;			// greater than num_xyz for seams
	int			num_tris;
	int			num_glcmds;		// dwords in strip/fan command list
	int			num_frames;

	int			ofs_skins;		// each skin is a MAX_SKINNAME string
	int			ofs_st;			// byte offset from start for stverts
	int			ofs_tris;		// offset for dtriangles
	int			ofs_frames;		// offset for first frame
	int			ofs_glcmds;
	int			ofs_end;		// end of file
} md2_t;

// all md3 ints, floats, and shorts, are little endian, and thus need to be
// passed through LittleLong/LittleFloat/LittleShort to avoid breaking on
// bigendian machines
#define MD3VERSION 15
#define MD3NAME 64
#define MD3FRAMENAME 16

// the origin is at 1/64th scale
// the pitch and yaw are encoded as 8 bits each
typedef struct md3vertex_s
{
	short origin[3];
	unsigned char pitch;
	unsigned char yaw;
}
md3vertex_t;

// one per frame
typedef struct md3frameinfo_s
{
	float mins[3];
	float maxs[3];
	float origin[3];
	float radius;
	char name[MD3FRAMENAME];
}
md3frameinfo_t;

// one per tag per frame
typedef struct md3tag_s
{
	char name[MD3NAME];
	float origin[3];
	float rotationmatrix[9];
}
md3tag_t;

// one per shader per mesh
typedef struct md3shader_s
{
	char name[MD3NAME];
	// engine field (yes this empty int does exist in the file)
	int shadernum;
}
md3shader_t;

// one per mesh per model
//
// note that the lump_ offsets in this struct are relative to the beginning
// of the mesh struct
//
// to find the next mesh in the file, you must go to lump_end, which puts you
// at the beginning of the next mesh
typedef struct md3mesh_s
{
	char identifier[4]; // "IDP3"
	char name[MD3NAME];
	int flags;
	int num_frames;
	int num_shaders;
	int num_vertices;
	int num_triangles;
	int lump_elements;
	int lump_shaders;
	int lump_texcoords;
	int lump_framevertices;
	int lump_end;
}
md3mesh_t;

// this struct is at the beginning of the md3 file
//
// note that the lump_ offsets in this struct are relative to the beginning
// of the header struct (which is the beginning of the file)
typedef struct md3modelheader_s
{
	char identifier[4]; // "IDP3"
	int version; // 15
	char name[MD3NAME];
	int flags;
	int num_frames;
	int num_tags;
	int num_meshes;
	int num_skins;
	int lump_frameinfo;
	int lump_tags;
	int lump_meshes;
	int lump_end;
}
md3modelheader_t;

typedef struct aliastag_s
{
	char name[MD3NAME];
	float matrixgl[12];
}
aliastag_t;

typedef struct aliasbone_s
{
	char name[MD3NAME];
	int flags;
	int parent; // -1 for no parent
}
aliasbone_t;

#include "model_zymotic.h"

#include "model_dpmodel.h"

#include "model_psk.h"

#include "model_iqm.h"

// for decoding md3 model latlong vertex normals
extern float mod_md3_sin[320];

extern cvar_t r_skeletal_debugbone;
extern cvar_t r_skeletal_debugbonecomponent;
extern cvar_t r_skeletal_debugbonevalue;
extern cvar_t r_skeletal_debugtranslatex;
extern cvar_t r_skeletal_debugtranslatey;
extern cvar_t r_skeletal_debugtranslatez;

struct model_s;
struct frameblend_s;

void *Mod_Skeletal_AnimateVertices_AllocBuffers(size_t nbytes);
void Mod_Skeletal_BuildTransforms(const struct model_s * RESTRICT model, const struct frameblend_s * RESTRICT frameblend, const skeleton_t *skeleton, float * RESTRICT bonepose, float * RESTRICT boneposerelative);

#endif