assimp.assimp/code/AssetLib/3DS/3DSLoader.h

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

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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*/

/** @file  3DSLoader.h
 *  @brief 3DS File format loader
 */
#ifndef AI_3DSIMPORTER_H_INC
#define AI_3DSIMPORTER_H_INC
#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER

#include <assimp/BaseImporter.h>
#include <assimp/types.h>


#include "3DSHelper.h"
#include <assimp/StreamReader.h>

struct aiNode;

namespace Assimp    {

using namespace D3DS;

// ---------------------------------------------------------------------------------
/** Importer class for 3D Studio r3 and r4 3DS files
 */
class Discreet3DSImporter final : public BaseImporter {
public:
    Discreet3DSImporter();
    ~Discreet3DSImporter() override = default;

    // -------------------------------------------------------------------
    /** 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;

    // -------------------------------------------------------------------
    /** Called prior to ReadFile().
     * The function is a request to the importer to update its configuration
     * basing on the Importer's configuration property list.
     */
    void SetupProperties(const Importer* pImp) 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;

    // -------------------------------------------------------------------
    /** Converts a temporary material to the outer representation
     */
    void ConvertMaterial(D3DS::Material& p_cMat,
        aiMaterial& p_pcOut);

    // -------------------------------------------------------------------
    /** Read a chunk
     *
     *  @param pcOut Receives the current chunk
     */
    void ReadChunk(Discreet3DS::Chunk* pcOut);

    // -------------------------------------------------------------------
    /** Parse a percentage chunk. mCurrent will point to the next
    * chunk behind afterwards. If no percentage chunk is found
    * QNAN is returned.
    */
    ai_real ParsePercentageChunk();

    // -------------------------------------------------------------------
    /** Parse a color chunk. mCurrent will point to the next
    * chunk behind afterwards. If no color chunk is found
    * QNAN is returned in all members.
    */
    void ParseColorChunk(aiColor3D* p_pcOut,
        bool p_bAcceptPercent = true);


    // -------------------------------------------------------------------
    /** Skip a chunk in the file
    */
    void SkipChunk();

    // -------------------------------------------------------------------
    /** Generate the nodegraph
    */
    void GenerateNodeGraph(aiScene* pcOut);

    // -------------------------------------------------------------------
    /** Parse a main top-level chunk in the file
    */
    void ParseMainChunk();

    // -------------------------------------------------------------------
    /** Parse a top-level chunk in the file
    */
    void ParseChunk(const char* name, unsigned int num);

    // -------------------------------------------------------------------
    /** Parse a top-level editor chunk in the file
    */
    void ParseEditorChunk();

    // -------------------------------------------------------------------
    /** Parse a top-level object chunk in the file
    */
    void ParseObjectChunk();

    // -------------------------------------------------------------------
    /** Parse a material chunk in the file
    */
    void ParseMaterialChunk();

    // -------------------------------------------------------------------
    /** Parse a mesh chunk in the file
    */
    void ParseMeshChunk();

    // -------------------------------------------------------------------
    /** Parse a light chunk in the file
    */
    void ParseLightChunk();

    // -------------------------------------------------------------------
    /** Parse a camera chunk in the file
    */
    void ParseCameraChunk();

    // -------------------------------------------------------------------
    /** Parse a face list chunk in the file
    */
    void ParseFaceChunk();

    // -------------------------------------------------------------------
    /** Parse a keyframe chunk in the file
    */
    void ParseKeyframeChunk();

    // -------------------------------------------------------------------
    /** Parse a hierarchy chunk in the file
    */
    void ParseHierarchyChunk(uint16_t parent);

    // -------------------------------------------------------------------
    /** Parse a texture chunk in the file
    */
    void ParseTextureChunk(D3DS::Texture* pcOut);

    // -------------------------------------------------------------------
    /** Convert the meshes in the file
    */
    void ConvertMeshes(aiScene* pcOut);

    // -------------------------------------------------------------------
    /** Replace the default material in the scene
    */
    void ReplaceDefaultMaterial();

    bool ContainsTextures(unsigned int i) const {
        return !mScene->mMaterials[i].sTexDiffuse.mMapName.empty() ||
               !mScene->mMaterials[i].sTexBump.mMapName.empty() ||
               !mScene->mMaterials[i].sTexOpacity.mMapName.empty() ||
               !mScene->mMaterials[i].sTexEmissive.mMapName.empty() ||
               !mScene->mMaterials[i].sTexSpecular.mMapName.empty() ||
               !mScene->mMaterials[i].sTexShininess.mMapName.empty() ;
    }

    // -------------------------------------------------------------------
    /** Convert the whole scene
    */
    void ConvertScene(aiScene* pcOut);

    // -------------------------------------------------------------------
    /** generate unique vertices for a mesh
    */
    void MakeUnique(D3DS::Mesh& sMesh);

    // -------------------------------------------------------------------
    /** Add a node to the node graph
    */
    void AddNodeToGraph(aiScene* pcSOut,aiNode* pcOut,D3DS::Node* pcIn,
        aiMatrix4x4& absTrafo);

    // -------------------------------------------------------------------
    /** Search for a node in the graph.
    * Called recursively
    */
    void InverseNodeSearch(D3DS::Node* pcNode,D3DS::Node* pcCurrent);

    // -------------------------------------------------------------------
    /** Apply the master scaling factor to the mesh
    */
    void ApplyMasterScale(aiScene* pScene);

    // -------------------------------------------------------------------
    /** Clamp all indices in the file to a valid range
    */
    void CheckIndices(D3DS::Mesh& sMesh);

    // -------------------------------------------------------------------
    /** Skip the TCB info in a track key
    */
    void SkipTCBInfo();

protected:

    /** Stream to read from */
    StreamReaderLE* stream;

    /** Last touched node index */
    short mLastNodeIndex;

    /** Current node, root node */
    D3DS::Node* mCurrentNode, *mRootNode;

    /** Scene under construction */
    D3DS::Scene* mScene;

    /** Ambient base color of the scene */
    aiColor3D mClrAmbient;

    /** Master scaling factor of the scene */
    ai_real mMasterScale;

    /** Path to the background image of the scene */
    std::string mBackgroundImage;
    bool bHasBG;

    /** true if PRJ file */
    bool bIsPrj;
};

} // end of namespace Assimp

#endif // !! ASSIMP_BUILD_NO_3DS_IMPORTER

#endif // AI_3DSIMPORTER_H_INC