//-
// ==========================================================================
// Copyright (C) 1995 - 2006 Autodesk, Inc. and/or its licensors.  All 
// rights reserved.
//
// The coded instructions, statements, computer programs, and/or related 
// material (collectively the "Data") in these files contain unpublished 
// information proprietary to Autodesk, Inc. ("Autodesk") and/or its 
// licensors, which is protected by U.S. and Canadian federal copyright 
// law and by international treaties.
//
// The Data is provided for use exclusively by You. You have the right 
// to use, modify, and incorporate this Data into other products for 
// purposes authorized by the Autodesk software license agreement, 
// without fee.
//
// The copyright notices in the Software and this entire statement, 
// including the above license grant, this restriction and the 
// following disclaimer, must be included in all copies of the 
// Software, in whole or in part, and all derivative works of 
// the Software, unless such copies or derivative works are solely 
// in the form of machine-executable object code generated by a 
// source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND. 
// AUTODESK DOES NOT MAKE AND HEREBY DISCLAIMS ANY EXPRESS OR IMPLIED 
// WARRANTIES INCLUDING, BUT NOT LIMITED TO, THE WARRANTIES OF 
// NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR 
// PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE, OR 
// TRADE PRACTICE. IN NO EVENT WILL AUTODESK AND/OR ITS LICENSORS 
// BE LIABLE FOR ANY LOST REVENUES, DATA, OR PROFITS, OR SPECIAL, 
// DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES, EVEN IF AUTODESK 
// AND/OR ITS LICENSORS HAS BEEN ADVISED OF THE POSSIBILITY 
// OR PROBABILITY OF SUCH DAMAGES.
//
// ==========================================================================
//+

#ifndef __POLYWRITER_H
#define __POLYWRITER_H

// polyWriter.h

// *****************************************************************************
//
// CLASS:    polyWriter
//
// *****************************************************************************
//
// CLASS DESCRIPTION (polyWriter)
// 
// polyWriter is a class used for creating polygonal mesh exporter plugins.  Its
// purpose is to output polygonal mesh data in the format required.  
// 
// To use this class, derive a new class and begin by adding the following *.h 
// files:
//    #include <maya/MFStream.h>
//
// The following functions must be implemented:
// constructor - which takes in MDagPath and MStatus object addresses
// destructor - which destroys any objects created in the constructor
// writeToFile() - which performs the actual data export
// outputSingleSet() - which performs the export of a particular polygonal set 
//					   on the mesh
//
// The extractGeometry() function may be overridden to extract more data that
// it is doing currently, but be sure to call this class' extractGeometry() 
// method as its first operation so that essential data is extracted.
//
// It is recommended that smaller helper functions are added to any derived
// classes, to export and format specific data about the mesh.  
//
// Once the derived class has been defined, create and return a new object of 
// this type in the createPolyWriter() function that must be defined in any
// class derived from the polyExporter class.
//
// For examples, see the classes polyRawWriter and polyX3DWriter
//
// *****************************************************************************

#include <maya/MFnMesh.h>
#include <maya/MPointArray.h>
#include <maya/MFloatVectorArray.h>
#include <maya/MFloatArray.h>

class polyWriter {

	public:
							polyWriter (MDagPath dagPath, MStatus& status);
		virtual				~polyWriter ();
		virtual MStatus		extractGeometry ();
		virtual MStatus		writeToFile (ostream & os) = 0;

	protected:
		//Methods
		//
				MObject		findShader (const MObject& setNode);
		virtual MStatus		outputSets (ostream& os);
		virtual	MStatus		outputSingleSet (ostream& os, 
											 MString setName, 
											 MIntArray faces, 
											 MString textureName) = 0;
		static	void		outputTabs (ostream & os, unsigned int tabCount);
	
		//Data Members
		//

		//the current UV set's name
		//
		MString				fCurrentUVSetName;

		//for storing general mesh information
		//
		MPointArray			fVertexArray;
		MColorArray			fColorArray;
		MFloatVectorArray	fNormalArray;
		MFloatVectorArray	fTangentArray;
		MFloatVectorArray	fBinormalArray;

		//for storing DAG objects
		//
		MFnMesh*			fMesh;
		MDagPath*			fDagPath;
		MObjectArray		fPolygonSets;
		MObjectArray		fPolygonComponents;
};

#endif /*__POLYWRITER_H*/