/*
Open Asset Import Library (ASSIMP)
----------------------------------------------------------------------

Copyright (c) 2006-2010, ASSIMP Development Team
All rights reserved.

Redistribution and use of this software in source and binary forms, 
with or without modification, are permitted provided that the 
following conditions are met:

* Redistributions of source code must retain the above
  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
  materials provided with the distribution.

* Neither the name of the ASSIMP team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

----------------------------------------------------------------------
*/
//!
//! @file Data structures for the 3D Game Studio Heightmap format (HMP)
//!

namespace Assimp	{
namespace HMP	{

#include "./../include/Compiler/pushpack1.h"

// to make it easier for us, we test the magic word against both "endianesses"
#define AI_HMP_MAGIC_NUMBER_BE_4	AI_MAKE_MAGIC("HMP4")
#define AI_HMP_MAGIC_NUMBER_LE_4	AI_MAKE_MAGIC("4PMH")

#define AI_HMP_MAGIC_NUMBER_BE_5	AI_MAKE_MAGIC("HMP5")
#define AI_HMP_MAGIC_NUMBER_LE_5	AI_MAKE_MAGIC("5PMH")

#define AI_HMP_MAGIC_NUMBER_BE_7	AI_MAKE_MAGIC("HMP7")
#define AI_HMP_MAGIC_NUMBER_LE_7	AI_MAKE_MAGIC("7PMH")

// ---------------------------------------------------------------------------
/** Data structure for the header of a HMP5 file.
 *  This is also used by HMP4 and HMP7, but with modifications
*/
struct Header_HMP5
{
	int8_t	ident[4]; // "HMP5"
	int32_t		version;
	
	// ignored
	float	scale[3];
	float	scale_origin[3];
	float	boundingradius;
	
	//! Size of one triangle in x direction
	float	ftrisize_x;		
	//! Size of one triangle in y direction
	float	ftrisize_y;		
	//! Number of vertices in x direction
	float	fnumverts_x;	
							
	//! Number of skins in the file
	int32_t		numskins;

	// can ignore this?
	int32_t		skinwidth;
	int32_t		skinheight;

	//!Number of vertices in the file
	int32_t		numverts;

	// ignored and zero
	int32_t		numtris;

	//! only one supported ...
	int32_t		numframes;		

	//! Always 0 ...
	int32_t		num_stverts;	
	int32_t		flags;
	float	size;
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** Data structure for a terrain vertex in a HMP4 file 
*/
struct Vertex_HMP4
{
	uint16_t p_pos[3];		
	uint8_t normals162index;	
	uint8_t pad;				
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** Data structure for a terrain vertex in a HMP5 file 
*/
struct Vertex_HMP5
{
	uint16_t z;	
	uint8_t normals162index;	
	uint8_t pad;				
} PACK_STRUCT;

// ---------------------------------------------------------------------------
/** Data structure for a terrain vertex in a HMP7 file 
*/
struct Vertex_HMP7
{
	uint16_t	 z;				
	int8_t normal_x,normal_y;
} PACK_STRUCT;

#include "./../include/Compiler/poppack1.h"

} //! namespace HMP
} //! namespace Assimp
