3DSLoader.h

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

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All rights reserved.

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
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  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
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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

#include "BaseImporter.h"
#include "../include/assimp/types.h"

#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER

struct aiNode;
#include "3DSHelper.h"

namespace Assimp	{


using namespace D3DS;

// ---------------------------------------------------------------------------------
/** Importer class for 3D Studio r3 and r4 3DS files
 */
class Discreet3DSImporter : public BaseImporter
{
public:

	Discreet3DSImporter();
	~Discreet3DSImporter();

public:

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

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

protected:

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

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

	// -------------------------------------------------------------------
	/** 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.
	*/
	float 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();

	// -------------------------------------------------------------------
	/** 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 */
	float 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