assimp/code/NFFLoader.h

/*
Open Asset Import Library (ASSIMP)
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*/

/** @file NFFLoader.h
 *  @brief Declaration of the NFF importer class.
 */
#ifndef AI_NFFLOADER_H_INCLUDED
#define AI_NFFLOADER_H_INCLUDED

#include "BaseImporter.h"
#include <vector>

#include "../include/aiTypes.h"

namespace Assimp	{

// ----------------------------------------------------------------------------------
/** NFF (Neutral File Format) Importer class.
 *
 * The class implements both Eric Haynes NFF format and Sense8's NFF (NFF2) format.
 * Both are quite different and the loading code is somewhat dirty at 
 * the moment. Sense8 should be moved to a separate loader.
*/
class NFFImporter : public BaseImporter
{
	friend class Importer;

protected:
	/** Constructor to be privately used by Importer */
	NFFImporter();

	/** Destructor, private as well */
	~NFFImporter();

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;

protected:

	// -------------------------------------------------------------------
	/** Called by Importer::GetExtensionList() for each loaded importer.
	 * See BaseImporter::GetExtensionList() for details
	 */
	void GetExtensionList(std::string& append);

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

private:

	
	// describes face material properties
	struct ShadingInfo
	{
		ShadingInfo()
			: color     (0.6f,0.6f,0.6f)
			, diffuse   (1.f,1.f,1.f)
			, specular  (1.f,1.f,1.f)
			, ambient   (0.f,0.f,0.f)
			, emissive	(0.f,0.f,0.f)
			, refracti  (1.f)
			, twoSided  (false) // for NFF2
			, shaded    (true)  // for NFF2
			, opacity	(1.f)
			, shininess	(0.f)
			, mapping	(aiTextureMapping_UV)
		{}

		aiColor3D color,diffuse,specular,ambient,emissive;
		float refracti;

		std::string texFile;

		// For NFF2
		bool twoSided;
		bool shaded;
		float opacity, shininess;

		std::string name;

		// texture mapping to be generated for the mesh - uv is the default
		// it means: use UV if there, nothing otherwise. This property is
		// used for locked meshes.
		aiTextureMapping mapping;

		// shininess is ignored for the moment
		bool operator == (const ShadingInfo& other) const
		{
			return color == other.color		&& 
				diffuse  == other.diffuse	&&
				specular == other.specular	&&
				ambient  == other.ambient	&&
				refracti == other.refracti  &&
				texFile  == other.texFile   &&
				twoSided == other.twoSided  &&
				shaded   == other.shaded;

			// Some properties from NFF2 aren't compared by this operator.
			// Comparing MeshInfo::matIndex should do that.
		}
	};

	// describes a NFF light source
	struct Light
	{
		Light()
			: intensity	(1.f)
			, color		(1.f,1.f,1.f)
		{}

		aiVector3D position;
		float intensity;
		aiColor3D color;
	};

	enum PatchType
	{
		PatchType_Simple = 0x0,
		PatchType_Normals = 0x1,
		PatchType_UVAndNormals = 0x2
	};

	// describes a NFF mesh
	struct MeshInfo
	{
		MeshInfo(PatchType _pType, bool bL = false)
			: pType     (_pType)
			, bLocked   (bL)
			, matIndex  (0)
			, radius	(1.f,1.f,1.f)
			, dir		(0.f,1.f,0.f)
		{
			name[0] = '\0'; // by default meshes are unnamed
		}

		ShadingInfo shader;
		PatchType pType;
		bool bLocked;

		// for spheres, cones and cylinders: center point of the object
		aiVector3D center, radius, dir;

		char name[128];

		std::vector<aiVector3D> vertices, normals, uvs;
		std::vector<unsigned int> faces;

		// for NFF2
		std::vector<aiColor4D>  colors; 
		unsigned int matIndex;
	};

	
	// -------------------------------------------------------------------
	/** Loads the material table for the NFF2 file format from an
	 *  external file.
	 *
	 *  @param output Receives the list of output meshes
	 *  @param path Path to the file (abs. or rel.)
	 *  @param pIOHandler IOSystem to be used to open the file
	*/
	void LoadNFF2MaterialTable(std::vector<ShadingInfo>& output,
		const std::string& path, IOSystem* pIOHandler);

};

} // end of namespace Assimp

#endif // AI_NFFIMPORTER_H_IN