assimp/code/AssetLib/HMP/HMPLoader.h

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

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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----------------------------------------------------------------------
*/
/** @file  HMPLoader.h
 *  @brief Declaration of the HMP importer class
 */
#pragma once
#ifndef AI_HMPLOADER_H_INCLUDED
#define AI_HMPLOADER_H_INCLUDED

#include <assimp/BaseImporter.h>

// internal headers
#include "AssetLib/HMP/HMPFileData.h"
#include "AssetLib/MDL/MDLLoader.h"

namespace Assimp {
using namespace HMP;

// ---------------------------------------------------------------------------
/** Used to load 3D GameStudio HMP files (terrains)
*/
class HMPImporter : public MDLImporter {
public:
    HMPImporter();
    ~HMPImporter() override;

    // -------------------------------------------------------------------
    /** Returns whether the class can handle the format of the given file.
     * See BaseImporter::CanRead() for details.
     */
    bool CanRead(const std::string &pFile, IOSystem *pIOHandler,
            bool checkSig) const override;

protected:
    // -------------------------------------------------------------------
    /** Return importer meta information.
     * See #BaseImporter::GetInfo for the details
     */
    const aiImporterDesc *GetInfo() const override;

    // -------------------------------------------------------------------
    /** Imports the given file into the given scene structure.
    * See BaseImporter::InternReadFile() for details
    */
    void InternReadFile(const std::string &pFile, aiScene *pScene,
            IOSystem *pIOHandler) override;

    // -------------------------------------------------------------------
    /** Import a HMP4 file
    */
    void InternReadFile_HMP4();

    // -------------------------------------------------------------------
    /** Import a HMP5 file
    */
    void InternReadFile_HMP5();

    // -------------------------------------------------------------------
    /** Import a HMP7 file
    */
    void InternReadFile_HMP7();

    // -------------------------------------------------------------------
    /** Validate a HMP 5,4,7 file header
    */
    void ValidateHeader_HMP457();

    // -------------------------------------------------------------------
    /** Try to load one material from the file, if this fails create
     * a default material
    */
    void CreateMaterial(const unsigned char *szCurrent,
            const unsigned char **szCurrentOut);

    // -------------------------------------------------------------------
    /** Build a list of output faces and vertices. The function
     *  triangulates the height map read from the file
     * \param width Width of the height field
     * \param width Height of the height field
    */
    void CreateOutputFaceList(unsigned int width, unsigned int height);

    // -------------------------------------------------------------------
    /** Generate planar texture coordinates for a terrain
     * \param width Width of the terrain, in vertices
     * \param height Height of the terrain, in vertices
    */
    void GenerateTextureCoords(const unsigned int width,
            const unsigned int height);

    // -------------------------------------------------------------------
    /** Read the first skin from the file and skip all others ...
     *  \param iNumSkins Number of skins in the file
     *  \param szCursor Position of the first skin (offset 84)
    */
    void ReadFirstSkin(unsigned int iNumSkins, const unsigned char *szCursor,
            const unsigned char **szCursorOut);
};

} // end of namespace Assimp

#endif // AI_HMPIMPORTER_H_INC