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

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  following disclaimer.

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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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----------------------------------------------------------------------
*/
//!
//! @file Data structures for the 3D Game Studio Heightmap format (HMP)
//!

namespace Assimp    {
namespace HMP   {

#include <assimp/Compiler/pushpack1.h>
#include <stdint.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 <assimp/Compiler/poppack1.h>

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