assimp/code/ColladaExporter.h

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

Copyright (c) 2006-2010, ASSIMP Development Team
All rights reserved.

Redistribution and use of this software in source and binary forms, 
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* Redistributions of source code must retain the above
  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  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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  derived from this software without specific prior
  written permission of the ASSIMP Development Team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
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*/

/** @file ColladaExporter.h
 * Declares the exporter class to write a scene to a Collada file
 */
#ifndef AI_COLLADAEXPORTER_H_INC
#define AI_COLLADAEXPORTER_H_INC

#include "../include/aiAssert.h"
#include <sstream>

struct aiScene;
struct aiNode;

namespace Assimp	
{

/// Helper class to export a given scene to a Collada file. Just for my personal
/// comfort when implementing it.
class ColladaExporter
{
public:
	/// Constructor for a specific scene to export
	ColladaExporter( const aiScene* pScene);

protected:
	/// Starts writing the contents
	void WriteFile();

	/// Writes the asset header
	void WriteHeader();

	/// Writes the geometry library
	void WriteGeometryLibrary();

	/// Writes the given mesh
	void WriteGeometry( size_t pIndex);

	enum FloatDataType { FloatType_Vector, FloatType_TexCoord2, FloatType_TexCoord3, FloatType_Color };

	/// Writes a float array of the given type
	void WriteFloatArray( const std::string& pIdString, FloatDataType pType, const float* pData, size_t pElementCount);

	/// Writes the scene library
	void WriteSceneLibrary();

	/// Recursively writes the given node
	void WriteNode( const aiNode* pNode);

	/// Enters a new xml element, which increases the indentation
	void PushTag() { startstr.append( "  "); }
	/// Leaves an element, decreasing the indentation
	void PopTag() { ai_assert( startstr.length() > 1); startstr.erase( startstr.length() - 2); }

	/// Creates a mesh ID for the given mesh
	std::string GetMeshId( size_t pIndex) const { return std::string( "meshId" ) + boost::lexical_cast<std::string> (pIndex); }

public:
	/// Stringstream to write all output into
	std::stringstream mOutput;

protected:
	/// The scene to be written
	const aiScene* mScene;

	/// current line start string, contains the current indentation for simple stream insertion
	std::string startstr;
	/// current line end string for simple stream insertion
	std::string endstr;
};

}

#endif // !! AI_COLLADAEXPORTER_H_INC