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

Return to Castle Wolfenstein single player GPL Source Code
Copyright (C) 1999-2010 id Software LLC, a ZeniMax Media company. 

This file is part of the Return to Castle Wolfenstein single player GPL Source Code (RTCW SP Source Code).  

RTCW SP Source Code 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 3 of the License, or
(at your option) any later version.

RTCW SP Source Code 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 RTCW SP Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the RTCW SP Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the RTCW SP Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

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

//===========================================================================
//
// Name:         aas_create.h
// Function:
// Programmer:   Mr Elusive (MrElusive@demigod.demon.nl)
// Last update:  1997-12-04
// Tab Size:     3
//===========================================================================

#define AREA_PORTAL         1

//temporary AAS face
typedef struct tmp_face_s
{
	int num;                        //face number
	int planenum;                   //number of the plane the face is in
	winding_t *winding;             //winding of the face
	struct tmp_area_s *frontarea;   //area at the front of the face
	struct tmp_area_s *backarea;    //area at the back of the face
	int faceflags;                  //flags of this face
	int aasfacenum;                 //the number of the aas face used for this face
	//double link list pointers for front and back area
	struct tmp_face_s *prev[2], *next[2];
	//links in the list with faces
	struct tmp_face_s *l_prev, *l_next;
} tmp_face_t;

//temporary AAS area settings
typedef struct tmp_areasettings_s
{
	//could also add all kind of statistic fields
	int contents;                   //contents of the area
	int modelnum;                   //bsp model inside this area
	int areaflags;                  //area flags
	int presencetype;               //how a bot can be present in this area
	int numreachableareas;          //number of reachable areas from this one
	int firstreachablearea;         //first reachable area in the reachable area index
	// Ridah, steepness
	float groundsteepness;
} tmp_areasettings_t;

//temporary AAS area
typedef struct tmp_area_s
{
	int areanum;                        //number of the area
	struct tmp_face_s *tmpfaces;        //the faces of the area
	int presencetype;                   //presence type of the area
	int contents;                       //area contents
	int modelnum;                       //bsp model inside this area
	int invalid;                        //true if the area is invalid
	tmp_areasettings_t *settings;       //area settings
	struct tmp_area_s *mergedarea;      //points to the new area after merging
										//when mergedarea != 0 the area has only the
										//seperating face of the merged areas
	int aasareanum;                     //number of the aas area created for this tmp area
	//links in the list with areas
	struct tmp_area_s *l_prev, *l_next;
} tmp_area_t;

//temporary AAS node
typedef struct tmp_node_s
{
	int planenum;                   //node plane number
	struct tmp_area_s *tmparea;     //points to an area if this node is an area
	struct tmp_node_s *children[2]; //child nodes of this node
} tmp_node_t;

#define NODEBUF_SIZE            128
//node buffer
typedef struct tmp_nodebuf_s
{
	int numnodes;
	struct tmp_nodebuf_s *next;
	tmp_node_t nodes[NODEBUF_SIZE];
} tmp_nodebuf_t;

//the whole temorary AAS
typedef struct tmp_aas_s
{
	//faces
	int numfaces;
	int facenum;
	tmp_face_t *faces;
	//areas
	int numareas;
	int areanum;
	tmp_area_t *areas;
	//area settings
	int numareasettings;
	tmp_areasettings_t *areasettings;
	//nodes
	int numnodes;
	tmp_node_t *nodes;
	//node buffer
	tmp_nodebuf_t *nodebuffer;
} tmp_aas_t;

extern tmp_aas_t tmpaasworld;

//creates a .AAS file with the given name from an already loaded map
void AAS_Create( char *aasfile );
//adds a face side to an area
void AAS_AddFaceSideToArea( tmp_face_t *tmpface, int side, tmp_area_t *tmparea );
//remvoes a face from an area
void AAS_RemoveFaceFromArea( tmp_face_t *tmpface, tmp_area_t *tmparea );
//allocate a tmp face
tmp_face_t *AAS_AllocTmpFace( void );
//free the tmp face
void AAS_FreeTmpFace( tmp_face_t *tmpface );
//allocate a tmp area
tmp_area_t *AAS_AllocTmpArea( void );
//free a tmp area
void AAS_FreeTmpArea( tmp_area_t *tmparea );
//allocate a tmp node
tmp_node_t *AAS_AllocTmpNode( void );
//free a tmp node
void AAS_FreeTmpNode( tmp_node_t *node );
//checks if an area is ok
void AAS_CheckArea( tmp_area_t *tmparea );
//flips the area faces where needed
void AAS_FlipAreaFaces( tmp_area_t *tmparea );
//returns true if the face is a gap seen from the given side
int AAS_GapFace( tmp_face_t *tmpface, int side );
//returns true if the face is a ground face
int AAS_GroundFace( tmp_face_t *tmpface );
