AOO410/main/basegfx/source/polygon/b3dpolygon.cxx

/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basegfx.hxx"
#include <osl/diagnose.h>
#include <basegfx/polygon/b3dpolygon.hxx>
#include <basegfx/point/b3dpoint.hxx>
#include <basegfx/matrix/b3dhommatrix.hxx>
#include <rtl/instance.hxx>
#include <basegfx/point/b2dpoint.hxx>
#include <basegfx/color/bcolor.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <vector>
#include <algorithm>

//////////////////////////////////////////////////////////////////////////////

class CoordinateData3D
{
	basegfx::B3DPoint								maPoint;

public:
	CoordinateData3D() 
	:	maPoint() 
	{
	}

	explicit CoordinateData3D(const basegfx::B3DPoint& rData)
	:	maPoint(rData) 
	{
	}

	const basegfx::B3DPoint& getCoordinate() const 
	{ 
		return maPoint; 
	}

	void setCoordinate(const basegfx::B3DPoint& rValue) 
	{ 
		if(rValue != maPoint) 
			maPoint = rValue; 
	}

	bool operator==(const CoordinateData3D& rData) const 
	{	
		return (maPoint == rData.getCoordinate()); 
	}

	void transform(const basegfx::B3DHomMatrix& rMatrix) 
	{ 
		maPoint *= rMatrix; 
	}
};

//////////////////////////////////////////////////////////////////////////////

class CoordinateDataArray3D
{
	typedef ::std::vector< CoordinateData3D > CoordinateData3DVector;

	CoordinateData3DVector							maVector;

public:
	explicit CoordinateDataArray3D(sal_uInt32 nCount)
	:	maVector(nCount)
	{
	}

	explicit CoordinateDataArray3D(const CoordinateDataArray3D& rOriginal)
	:	maVector(rOriginal.maVector)
	{
	}

	CoordinateDataArray3D(const CoordinateDataArray3D& rOriginal, sal_uInt32 nIndex, sal_uInt32 nCount)
	:	maVector(rOriginal.maVector.begin() + nIndex, rOriginal.maVector.begin() + (nIndex + nCount))
	{
	}

	~CoordinateDataArray3D()
	{
	}

	::basegfx::B3DVector getNormal() const
	{
		::basegfx::B3DVector aRetval;
		const sal_uInt32 nPointCount(maVector.size());

		if(nPointCount > 2)
		{
            sal_uInt32 nISmallest(0);
            sal_uInt32 a(0);
            const basegfx::B3DPoint* pSmallest(&maVector[0].getCoordinate());
            const basegfx::B3DPoint* pNext(0);
            const basegfx::B3DPoint* pPrev(0);

            // To guarantee a correctly oriented point, choose an outmost one
            // which then cannot be concave
            for(a = 1; a < nPointCount; a++)
            {
            	const basegfx::B3DPoint& rCandidate = maVector[a].getCoordinate();
                
                if((rCandidate.getX() < pSmallest->getX())
                    || (rCandidate.getX() == pSmallest->getX() && rCandidate.getY() < pSmallest->getY())
                    || (rCandidate.getX() == pSmallest->getX() && rCandidate.getY() == pSmallest->getY() && rCandidate.getZ() < pSmallest->getZ()))
                {
                    nISmallest = a;
                    pSmallest = &rCandidate;
                }
            }

            // look for a next point different from minimal one
            for(a = (nISmallest + 1) % nPointCount; a != nISmallest; a = (a + 1) % nPointCount)
            {
            	const basegfx::B3DPoint& rCandidate = maVector[a].getCoordinate();

                if(!rCandidate.equal(*pSmallest))
                {
                	pNext = &rCandidate;
                    break;
                }
            }

            // look for a previous point different from minimal one
            for(a = (nISmallest + nPointCount - 1) % nPointCount; a != nISmallest; a = (a + nPointCount - 1) % nPointCount)
            {
            	const basegfx::B3DPoint& rCandidate = maVector[a].getCoordinate();

                if(!rCandidate.equal(*pSmallest))
                {
                	pPrev = &rCandidate;
                    break;
                }
            }

            // we always have a minimal point. If we also have a different next and previous,
            // we can calculate the normal
            if(pNext && pPrev)
            {
                const basegfx::B3DVector aPrev(*pPrev - *pSmallest);
                const basegfx::B3DVector aNext(*pNext - *pSmallest);

                aRetval = cross(aPrev, aNext);
    			aRetval.normalize();
            }
		}

		return aRetval;
	}

	sal_uInt32 count() const
	{
		return maVector.size();
	}

	bool operator==(const CoordinateDataArray3D& rCandidate) const
	{
		return (maVector == rCandidate.maVector);
	}

	const basegfx::B3DPoint& getCoordinate(sal_uInt32 nIndex) const
	{
		return maVector[nIndex].getCoordinate();
	}

	void setCoordinate(sal_uInt32 nIndex, const basegfx::B3DPoint& rValue)
	{
		maVector[nIndex].setCoordinate(rValue);
	}

	void insert(sal_uInt32 nIndex, const CoordinateData3D& rValue, sal_uInt32 nCount)
	{
		if(nCount)
		{
			// add nCount copies of rValue
			CoordinateData3DVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			maVector.insert(aIndex, nCount, rValue);
		}
	}

	void insert(sal_uInt32 nIndex, const CoordinateDataArray3D& rSource)
	{
		const sal_uInt32 nCount(rSource.maVector.size());

		if(nCount)
		{
			// insert data
			CoordinateData3DVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			CoordinateData3DVector::const_iterator aStart(rSource.maVector.begin());
			CoordinateData3DVector::const_iterator aEnd(rSource.maVector.end());
			maVector.insert(aIndex, aStart, aEnd);
		}
	}

	void remove(sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		if(nCount)
		{
			// remove point data
			CoordinateData3DVector::iterator aStart(maVector.begin());
			aStart += nIndex;
			const CoordinateData3DVector::iterator aEnd(aStart + nCount);
			maVector.erase(aStart, aEnd);
		}
	}

	void flip()
	{
		if(maVector.size() > 1)
		{
			const sal_uInt32 nHalfSize(maVector.size() >> 1L);
			CoordinateData3DVector::iterator aStart(maVector.begin());
			CoordinateData3DVector::iterator aEnd(maVector.end() - 1L);
			
			for(sal_uInt32 a(0); a < nHalfSize; a++)
			{
				::std::swap(*aStart, *aEnd);
				aStart++;
				aEnd--;
			}
		}
	}

	void transform(const ::basegfx::B3DHomMatrix& rMatrix)
	{
		CoordinateData3DVector::iterator aStart(maVector.begin());
		CoordinateData3DVector::iterator aEnd(maVector.end());

		for(; aStart != aEnd; aStart++)
		{
			aStart->transform(rMatrix);
		}
	}
};

//////////////////////////////////////////////////////////////////////////////

class BColorArray
{
	typedef ::std::vector< ::basegfx::BColor > BColorDataVector;

	BColorDataVector									maVector;
	sal_uInt32											mnUsedEntries;

public:
	explicit BColorArray(sal_uInt32 nCount)
	:	maVector(nCount),
		mnUsedEntries(0L)
	{
	}

	explicit BColorArray(const BColorArray& rOriginal)
	:	maVector(rOriginal.maVector),
		mnUsedEntries(rOriginal.mnUsedEntries)
	{
	}

	BColorArray(const BColorArray& rOriginal, sal_uInt32 nIndex, sal_uInt32 nCount)
	:	maVector(),
		mnUsedEntries(0L)
	{
		BColorDataVector::const_iterator aStart(rOriginal.maVector.begin());
		aStart += nIndex;
		BColorDataVector::const_iterator aEnd(aStart);
		aEnd += nCount;
		maVector.reserve(nCount);

		for(; aStart != aEnd; aStart++)
		{
			if(!aStart->equalZero())
				mnUsedEntries++;

			maVector.push_back(*aStart);
		}
	}

	~BColorArray()
	{
	}

	sal_uInt32 count() const
	{
		return maVector.size();
	}

	bool operator==(const BColorArray& rCandidate) const
	{
		return (maVector == rCandidate.maVector);
	}

	bool isUsed() const 
	{ 
		return (0L != mnUsedEntries);
	}

	const ::basegfx::BColor& getBColor(sal_uInt32 nIndex) const
	{
		return maVector[nIndex];
	}

	void setBColor(sal_uInt32 nIndex, const ::basegfx::BColor& rValue)
	{
		bool bWasUsed(mnUsedEntries && !maVector[nIndex].equalZero());
		bool bIsUsed(!rValue.equalZero());

		if(bWasUsed)
		{
			if(bIsUsed)
			{
				maVector[nIndex] = rValue;
			}
			else
			{
				maVector[nIndex] = ::basegfx::BColor::getEmptyBColor();
				mnUsedEntries--;
			}
		}
		else
		{
			if(bIsUsed)
			{
				maVector[nIndex] = rValue;
				mnUsedEntries++;
			}
		}
	}

	void insert(sal_uInt32 nIndex, const ::basegfx::BColor& rValue, sal_uInt32 nCount)
	{
		if(nCount)
		{
			// add nCount copies of rValue
			BColorDataVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			maVector.insert(aIndex, nCount, rValue);

			if(!rValue.equalZero())
				mnUsedEntries += nCount;
		}
	}

	void insert(sal_uInt32 nIndex, const BColorArray& rSource)
	{
		const sal_uInt32 nCount(rSource.maVector.size());

		if(nCount)
		{
			// insert data
			BColorDataVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			BColorDataVector::const_iterator aStart(rSource.maVector.begin());
			BColorDataVector::const_iterator aEnd(rSource.maVector.end());
			maVector.insert(aIndex, aStart, aEnd);

			for(; aStart != aEnd; aStart++)
			{
				if(!aStart->equalZero())
					mnUsedEntries++;
			}
		}
	}

	void remove(sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		if(nCount)
		{
			const BColorDataVector::iterator aDeleteStart(maVector.begin() + nIndex);
			const BColorDataVector::iterator aDeleteEnd(aDeleteStart + nCount);
			BColorDataVector::const_iterator aStart(aDeleteStart);

			for(; mnUsedEntries && aStart != aDeleteEnd; aStart++)
			{
				if(!aStart->equalZero())
					mnUsedEntries--;
			}

			// remove point data
			maVector.erase(aDeleteStart, aDeleteEnd);
		}
	}

	void flip()
	{
		if(maVector.size() > 1)
		{
			const sal_uInt32 nHalfSize(maVector.size() >> 1L);
			BColorDataVector::iterator aStart(maVector.begin());
			BColorDataVector::iterator aEnd(maVector.end() - 1L);
			
			for(sal_uInt32 a(0); a < nHalfSize; a++)
			{
				::std::swap(*aStart, *aEnd);
				aStart++;
				aEnd--;
			}
		}
	}
};

//////////////////////////////////////////////////////////////////////////////

class NormalsArray3D
{
	typedef ::std::vector< ::basegfx::B3DVector > NormalsData3DVector;

	NormalsData3DVector									maVector;
	sal_uInt32											mnUsedEntries;

public:
	explicit NormalsArray3D(sal_uInt32 nCount)
	:	maVector(nCount),
		mnUsedEntries(0L)
	{
	}

	explicit NormalsArray3D(const NormalsArray3D& rOriginal)
	:	maVector(rOriginal.maVector),
		mnUsedEntries(rOriginal.mnUsedEntries)
	{
	}

	NormalsArray3D(const NormalsArray3D& rOriginal, sal_uInt32 nIndex, sal_uInt32 nCount)
	:	maVector(),
		mnUsedEntries(0L)
	{
		NormalsData3DVector::const_iterator aStart(rOriginal.maVector.begin());
		aStart += nIndex;
		NormalsData3DVector::const_iterator aEnd(aStart);
		aEnd += nCount;
		maVector.reserve(nCount);

		for(; aStart != aEnd; aStart++)
		{
			if(!aStart->equalZero())
				mnUsedEntries++;

			maVector.push_back(*aStart);
		}
	}

	~NormalsArray3D()
	{
	}

	sal_uInt32 count() const
	{
		return maVector.size();
	}

	bool operator==(const NormalsArray3D& rCandidate) const
	{
		return (maVector == rCandidate.maVector);
	}

	bool isUsed() const 
	{ 
		return (0L != mnUsedEntries);
	}

	const ::basegfx::B3DVector& getNormal(sal_uInt32 nIndex) const
	{
		return maVector[nIndex];
	}

	void setNormal(sal_uInt32 nIndex, const ::basegfx::B3DVector& rValue)
	{
		bool bWasUsed(mnUsedEntries && !maVector[nIndex].equalZero());
		bool bIsUsed(!rValue.equalZero());

		if(bWasUsed)
		{
			if(bIsUsed)
			{
				maVector[nIndex] = rValue;
			}
			else
			{
				maVector[nIndex] = ::basegfx::B3DVector::getEmptyVector();
				mnUsedEntries--;
			}
		}
		else
		{
			if(bIsUsed)
			{
				maVector[nIndex] = rValue;
				mnUsedEntries++;
			}
		}
	}

	void insert(sal_uInt32 nIndex, const ::basegfx::B3DVector& rValue, sal_uInt32 nCount)
	{
		if(nCount)
		{
			// add nCount copies of rValue
			NormalsData3DVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			maVector.insert(aIndex, nCount, rValue);

			if(!rValue.equalZero())
				mnUsedEntries += nCount;
		}
	}

	void insert(sal_uInt32 nIndex, const NormalsArray3D& rSource)
	{
		const sal_uInt32 nCount(rSource.maVector.size());

		if(nCount)
		{
			// insert data
			NormalsData3DVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			NormalsData3DVector::const_iterator aStart(rSource.maVector.begin());
			NormalsData3DVector::const_iterator aEnd(rSource.maVector.end());
			maVector.insert(aIndex, aStart, aEnd);

			for(; aStart != aEnd; aStart++)
			{
				if(!aStart->equalZero())
					mnUsedEntries++;
			}
		}
	}

	void remove(sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		if(nCount)
		{
			const NormalsData3DVector::iterator aDeleteStart(maVector.begin() + nIndex);
			const NormalsData3DVector::iterator aDeleteEnd(aDeleteStart + nCount);
			NormalsData3DVector::const_iterator aStart(aDeleteStart);

			for(; mnUsedEntries && aStart != aDeleteEnd; aStart++)
			{
				if(!aStart->equalZero())
					mnUsedEntries--;
			}

			// remove point data
			maVector.erase(aDeleteStart, aDeleteEnd);
		}
	}

	void flip()
	{
		if(maVector.size() > 1)
		{
			const sal_uInt32 nHalfSize(maVector.size() >> 1L);
			NormalsData3DVector::iterator aStart(maVector.begin());
			NormalsData3DVector::iterator aEnd(maVector.end() - 1L);
			
			for(sal_uInt32 a(0); a < nHalfSize; a++)
			{
				::std::swap(*aStart, *aEnd);
				aStart++;
				aEnd--;
			}
		}
	}

	void transform(const basegfx::B3DHomMatrix& rMatrix)
	{
		NormalsData3DVector::iterator aStart(maVector.begin());
		NormalsData3DVector::iterator aEnd(maVector.end());

		for(; aStart != aEnd; aStart++)
		{
			(*aStart) *= rMatrix;
		}
	}
};

//////////////////////////////////////////////////////////////////////////////

class TextureCoordinate2D
{
	typedef ::std::vector< ::basegfx::B2DPoint > TextureData2DVector;

	TextureData2DVector									maVector;
	sal_uInt32											mnUsedEntries;

public:
	explicit TextureCoordinate2D(sal_uInt32 nCount)
	:	maVector(nCount),
		mnUsedEntries(0L)
	{
	}

	explicit TextureCoordinate2D(const TextureCoordinate2D& rOriginal)
	:	maVector(rOriginal.maVector),
		mnUsedEntries(rOriginal.mnUsedEntries)
	{
	}

	TextureCoordinate2D(const TextureCoordinate2D& rOriginal, sal_uInt32 nIndex, sal_uInt32 nCount)
	:	maVector(),
		mnUsedEntries(0L)
	{
		TextureData2DVector::const_iterator aStart(rOriginal.maVector.begin());
		aStart += nIndex;
		TextureData2DVector::const_iterator aEnd(aStart);
		aEnd += nCount;
		maVector.reserve(nCount);

		for(; aStart != aEnd; aStart++)
		{
			if(!aStart->equalZero())
				mnUsedEntries++;

			maVector.push_back(*aStart);
		}
	}

	~TextureCoordinate2D()
	{
	}

	sal_uInt32 count() const
	{
		return maVector.size();
	}

	bool operator==(const TextureCoordinate2D& rCandidate) const
	{
		return (maVector == rCandidate.maVector);
	}

	bool isUsed() const 
	{ 
		return (0L != mnUsedEntries);
	}

	const ::basegfx::B2DPoint& getTextureCoordinate(sal_uInt32 nIndex) const
	{
		return maVector[nIndex];
	}

	void setTextureCoordinate(sal_uInt32 nIndex, const ::basegfx::B2DPoint& rValue)
	{
		bool bWasUsed(mnUsedEntries && !maVector[nIndex].equalZero());
		bool bIsUsed(!rValue.equalZero());

		if(bWasUsed)
		{
			if(bIsUsed)
			{
				maVector[nIndex] = rValue;
			}
			else
			{
				maVector[nIndex] = ::basegfx::B2DPoint::getEmptyPoint();
				mnUsedEntries--;
			}
		}
		else
		{
			if(bIsUsed)
			{
				maVector[nIndex] = rValue;
				mnUsedEntries++;
			}
		}
	}

	void insert(sal_uInt32 nIndex, const ::basegfx::B2DPoint& rValue, sal_uInt32 nCount)
	{
		if(nCount)
		{
			// add nCount copies of rValue
			TextureData2DVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			maVector.insert(aIndex, nCount, rValue);

			if(!rValue.equalZero())
				mnUsedEntries += nCount;
		}
	}

	void insert(sal_uInt32 nIndex, const TextureCoordinate2D& rSource)
	{
		const sal_uInt32 nCount(rSource.maVector.size());

		if(nCount)
		{
			// insert data
			TextureData2DVector::iterator aIndex(maVector.begin());
			aIndex += nIndex;
			TextureData2DVector::const_iterator aStart(rSource.maVector.begin());
			TextureData2DVector::const_iterator aEnd(rSource.maVector.end());
			maVector.insert(aIndex, aStart, aEnd);

			for(; aStart != aEnd; aStart++)
			{
				if(!aStart->equalZero())
					mnUsedEntries++;
			}
		}
	}

	void remove(sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		if(nCount)
		{
			const TextureData2DVector::iterator aDeleteStart(maVector.begin() + nIndex);
			const TextureData2DVector::iterator aDeleteEnd(aDeleteStart + nCount);
			TextureData2DVector::const_iterator aStart(aDeleteStart);

			for(; mnUsedEntries && aStart != aDeleteEnd; aStart++)
			{
				if(!aStart->equalZero())
					mnUsedEntries--;
			}

			// remove point data
			maVector.erase(aDeleteStart, aDeleteEnd);
		}
	}

	void flip()
	{
		if(maVector.size() > 1)
		{
			const sal_uInt32 nHalfSize(maVector.size() >> 1L);
			TextureData2DVector::iterator aStart(maVector.begin());
			TextureData2DVector::iterator aEnd(maVector.end() - 1L);
			
			for(sal_uInt32 a(0); a < nHalfSize; a++)
			{
				::std::swap(*aStart, *aEnd);
				aStart++;
				aEnd--;
			}
		}
	}

	void transform(const ::basegfx::B2DHomMatrix& rMatrix)
	{
		TextureData2DVector::iterator aStart(maVector.begin());
		TextureData2DVector::iterator aEnd(maVector.end());

		for(; aStart != aEnd; aStart++)
		{
			(*aStart) *= rMatrix;
		}
	}
};

//////////////////////////////////////////////////////////////////////////////

class ImplB3DPolygon
{
	// The point vector. This vector exists always and defines the
	// count of members.
	CoordinateDataArray3D							maPoints;

	// The BColor vector. This vectors are created on demand
	// and may be zero.
	BColorArray*									mpBColors;

	// The Normals vector. This vectors are created on demand
	// and may be zero.
	NormalsArray3D*									mpNormals;

	// The TextureCoordinates vector. This vectors are created on demand
	// and may be zero.
	TextureCoordinate2D*							mpTextureCoordiantes;

	// The calculated plane normal. mbPlaneNormalValid says if it's valid.
	::basegfx::B3DVector							maPlaneNormal;

	// bitfield
	// flag which decides if this polygon is opened or closed
	unsigned										mbIsClosed : 1;

	// flag which says if maPlaneNormal is up-to-date
	unsigned										mbPlaneNormalValid : 1;

protected:
	void invalidatePlaneNormal()
	{
		if(mbPlaneNormalValid)
		{
			mbPlaneNormalValid = false;
		}
	}

public:
	// This constructor is only used from the static identity polygon, thus
	// the RefCount is set to 1 to never 'delete' this static incarnation.
	ImplB3DPolygon()
	:	maPoints(0L),
		mpBColors(0L),
		mpNormals(0L),
		mpTextureCoordiantes(0L),
		maPlaneNormal(::basegfx::B3DVector::getEmptyVector()),
		mbIsClosed(false),
		mbPlaneNormalValid(true)
	{
		// complete initialization with defaults
	}

	ImplB3DPolygon(const ImplB3DPolygon& rToBeCopied)
	:	maPoints(rToBeCopied.maPoints),
		mpBColors(0L),
		mpNormals(0L),
		mpTextureCoordiantes(0L),
		maPlaneNormal(rToBeCopied.maPlaneNormal),
		mbIsClosed(rToBeCopied.mbIsClosed),
		mbPlaneNormalValid(rToBeCopied.mbPlaneNormalValid)
	{
		// complete initialization using copy
		if(rToBeCopied.mpBColors && rToBeCopied.mpBColors->isUsed())
		{
			mpBColors = new BColorArray(*rToBeCopied.mpBColors);
		}

		if(rToBeCopied.mpNormals && rToBeCopied.mpNormals->isUsed())
		{
			mpNormals = new NormalsArray3D(*rToBeCopied.mpNormals);
		}

		if(rToBeCopied.mpTextureCoordiantes && rToBeCopied.mpTextureCoordiantes->isUsed())
		{
			mpTextureCoordiantes = new TextureCoordinate2D(*rToBeCopied.mpTextureCoordiantes);
		}
	}

	ImplB3DPolygon(const ImplB3DPolygon& rToBeCopied, sal_uInt32 nIndex, sal_uInt32 nCount)
	:	maPoints(rToBeCopied.maPoints, nIndex, nCount),
		mpBColors(0L),
		mpNormals(0L),
		mpTextureCoordiantes(0L),
		maPlaneNormal(::basegfx::B3DVector::getEmptyVector()),
		mbIsClosed(rToBeCopied.mbIsClosed),
		mbPlaneNormalValid(false)
	{
		// complete initialization using partly copy
		if(rToBeCopied.mpBColors && rToBeCopied.mpBColors->isUsed())
		{
			mpBColors = new BColorArray(*rToBeCopied.mpBColors, nIndex, nCount);

			if(!mpBColors->isUsed())
			{
				delete mpBColors;
				mpBColors = 0L;
			}
		}

		if(rToBeCopied.mpNormals && rToBeCopied.mpNormals->isUsed())
		{
			mpNormals = new NormalsArray3D(*rToBeCopied.mpNormals, nIndex, nCount);

			if(!mpNormals->isUsed())
			{
				delete mpNormals;
				mpNormals = 0L;
			}
		}

		if(rToBeCopied.mpTextureCoordiantes && rToBeCopied.mpTextureCoordiantes->isUsed())
		{
			mpTextureCoordiantes = new TextureCoordinate2D(*rToBeCopied.mpTextureCoordiantes, nIndex, nCount);

			if(!mpTextureCoordiantes->isUsed())
			{
				delete mpTextureCoordiantes;
				mpTextureCoordiantes = 0L;
			}
		}
	}

	~ImplB3DPolygon()
	{
		if(mpBColors)
		{
			delete mpBColors;
			mpBColors = 0L;
		}

		if(mpNormals)
		{
			delete mpNormals;
			mpNormals = 0L;
		}

		if(mpTextureCoordiantes)
		{
			delete mpTextureCoordiantes;
			mpTextureCoordiantes = 0L;
		}
	}

	sal_uInt32 count() const
	{
		return maPoints.count();
	}

	bool isClosed() const
	{
		return mbIsClosed;
	}

	void setClosed(bool bNew)
	{
		if(bNew != (bool)mbIsClosed)
		{
			mbIsClosed = bNew;
		}
	}

	inline bool impBColorsAreEqual(const ImplB3DPolygon& rCandidate) const
	{
		bool bBColorsAreEqual(true);

		if(mpBColors)
		{
			if(rCandidate.mpBColors)
			{
				bBColorsAreEqual = (*mpBColors == *rCandidate.mpBColors);
			}
			else
			{
				// candidate has no BColors, so it's assumed all unused.
				bBColorsAreEqual = !mpBColors->isUsed();
			}
		}
		else
		{
			if(rCandidate.mpBColors)
			{
				// we have no TextureCoordiantes, so it's assumed all unused.
				bBColorsAreEqual = !rCandidate.mpBColors->isUsed();
			}
		}

		return bBColorsAreEqual;
	}

	inline bool impNormalsAreEqual(const ImplB3DPolygon& rCandidate) const
	{
		bool bNormalsAreEqual(true);

		if(mpNormals)
		{
			if(rCandidate.mpNormals)
			{
				bNormalsAreEqual = (*mpNormals == *rCandidate.mpNormals);
			}
			else
			{
				// candidate has no normals, so it's assumed all unused.
				bNormalsAreEqual = !mpNormals->isUsed();
			}
		}
		else
		{
			if(rCandidate.mpNormals)
			{
				// we have no normals, so it's assumed all unused.
				bNormalsAreEqual = !rCandidate.mpNormals->isUsed();
			}
		}

		return bNormalsAreEqual;
	}

	inline bool impTextureCoordinatesAreEqual(const ImplB3DPolygon& rCandidate) const
	{
		bool bTextureCoordinatesAreEqual(true);

		if(mpTextureCoordiantes)
		{
			if(rCandidate.mpTextureCoordiantes)
			{
				bTextureCoordinatesAreEqual = (*mpTextureCoordiantes == *rCandidate.mpTextureCoordiantes);
			}
			else
			{
				// candidate has no TextureCoordinates, so it's assumed all unused.
				bTextureCoordinatesAreEqual = !mpTextureCoordiantes->isUsed();
			}
		}
		else
		{
			if(rCandidate.mpTextureCoordiantes)
			{
				// we have no TextureCoordiantes, so it's assumed all unused.
				bTextureCoordinatesAreEqual = !rCandidate.mpTextureCoordiantes->isUsed();
			}
		}

		return bTextureCoordinatesAreEqual;
	}

	bool operator==(const ImplB3DPolygon& rCandidate) const
	{
		if(mbIsClosed == rCandidate.mbIsClosed)
		{
			if(maPoints == rCandidate.maPoints)
			{
				if(impBColorsAreEqual(rCandidate))
				{
					if(impNormalsAreEqual(rCandidate))
					{
						if(impTextureCoordinatesAreEqual(rCandidate))
						{
							return true;
						}
					}
				}
			}
		}

		return false;
	}

	const ::basegfx::B3DPoint& getPoint(sal_uInt32 nIndex) const
	{
		return maPoints.getCoordinate(nIndex);
	}

	void setPoint(sal_uInt32 nIndex, const ::basegfx::B3DPoint& rValue)
	{
		maPoints.setCoordinate(nIndex, rValue);
		invalidatePlaneNormal();
	}

	void insert(sal_uInt32 nIndex, const ::basegfx::B3DPoint& rPoint, sal_uInt32 nCount)
	{
		if(nCount)
		{
			CoordinateData3D aCoordinate(rPoint);
			maPoints.insert(nIndex, aCoordinate, nCount);
			invalidatePlaneNormal();

			if(mpBColors)
			{
				mpBColors->insert(nIndex, ::basegfx::BColor::getEmptyBColor(), nCount);
			}

			if(mpNormals)
			{
				mpNormals->insert(nIndex, ::basegfx::B3DVector::getEmptyVector(), nCount);
			}

			if(mpTextureCoordiantes)
			{
				mpTextureCoordiantes->insert(nIndex, ::basegfx::B2DPoint::getEmptyPoint(), nCount);
			}
		}
	}

	const ::basegfx::BColor& getBColor(sal_uInt32 nIndex) const
	{
		if(mpBColors)
		{
			return mpBColors->getBColor(nIndex);
		}
		else
		{
			return ::basegfx::BColor::getEmptyBColor();
		}
	}

	void setBColor(sal_uInt32 nIndex, const ::basegfx::BColor& rValue)
	{
		if(!mpBColors)
		{
			if(!rValue.equalZero())
			{
				mpBColors = new BColorArray(maPoints.count());
				mpBColors->setBColor(nIndex, rValue);
			}
		}
		else
		{
			mpBColors->setBColor(nIndex, rValue);

			if(!mpBColors->isUsed())
			{
				delete mpBColors;
				mpBColors = 0L;
			}
		}
	}

	bool areBColorsUsed() const
	{
		return (mpBColors && mpBColors->isUsed());
	}

	void clearBColors()
	{
		if(mpBColors)
		{
			delete mpBColors;
			mpBColors = 0L;
		}
	}

	const ::basegfx::B3DVector& getNormal() const
	{
		if(!mbPlaneNormalValid)
		{
			const_cast< ImplB3DPolygon* >(this)->maPlaneNormal = maPoints.getNormal();
			const_cast< ImplB3DPolygon* >(this)->mbPlaneNormalValid = true;
		}

		return maPlaneNormal;
	}

	const ::basegfx::B3DVector& getNormal(sal_uInt32 nIndex) const
	{
		if(mpNormals)
		{
			return mpNormals->getNormal(nIndex);
		}
		else
		{
			return ::basegfx::B3DVector::getEmptyVector();
		}
	}

	void setNormal(sal_uInt32 nIndex, const ::basegfx::B3DVector& rValue)
	{
		if(!mpNormals)
		{
			if(!rValue.equalZero())
			{
				mpNormals = new NormalsArray3D(maPoints.count());
				mpNormals->setNormal(nIndex, rValue);
			}
		}
		else
		{
			mpNormals->setNormal(nIndex, rValue);

			if(!mpNormals->isUsed())
			{
				delete mpNormals;
				mpNormals = 0L;
			}
		}
	}

	void transformNormals(const ::basegfx::B3DHomMatrix& rMatrix)
	{
		if(mpNormals)
		{
			mpNormals->transform(rMatrix);
		}
	}

	bool areNormalsUsed() const
	{
		return (mpNormals && mpNormals->isUsed());
	}

	void clearNormals()
	{
		if(mpNormals)
		{
			delete mpNormals;
			mpNormals = 0L;
		}
	}

	const ::basegfx::B2DPoint& getTextureCoordinate(sal_uInt32 nIndex) const
	{
		if(mpTextureCoordiantes)
		{
			return mpTextureCoordiantes->getTextureCoordinate(nIndex);
		}
		else
		{
			return ::basegfx::B2DPoint::getEmptyPoint();
		}
	}

	void setTextureCoordinate(sal_uInt32 nIndex, const ::basegfx::B2DPoint& rValue)
	{
		if(!mpTextureCoordiantes)
		{
			if(!rValue.equalZero())
			{
				mpTextureCoordiantes = new TextureCoordinate2D(maPoints.count());
				mpTextureCoordiantes->setTextureCoordinate(nIndex, rValue);
			}
		}
		else
		{
			mpTextureCoordiantes->setTextureCoordinate(nIndex, rValue);

			if(!mpTextureCoordiantes->isUsed())
			{
				delete mpTextureCoordiantes;
				mpTextureCoordiantes = 0L;
			}
		}
	}

	bool areTextureCoordinatesUsed() const
	{
		return (mpTextureCoordiantes && mpTextureCoordiantes->isUsed());
	}

	void clearTextureCoordinates()
	{
		if(mpTextureCoordiantes)
		{
			delete mpTextureCoordiantes;
			mpTextureCoordiantes = 0L;
		}
	}

	void transformTextureCoordinates(const ::basegfx::B2DHomMatrix& rMatrix)
	{
		if(mpTextureCoordiantes)
		{
			mpTextureCoordiantes->transform(rMatrix);
		}
	}

	void insert(sal_uInt32 nIndex, const ImplB3DPolygon& rSource)
	{
		const sal_uInt32 nCount(rSource.maPoints.count());

		if(nCount)
		{
			maPoints.insert(nIndex, rSource.maPoints);
			invalidatePlaneNormal();

			if(rSource.mpBColors && rSource.mpBColors->isUsed())
			{
				if(!mpBColors)
				{
					mpBColors = new BColorArray(maPoints.count());
				}

				mpBColors->insert(nIndex, *rSource.mpBColors);
			}
			else
			{
				if(mpBColors)
				{
					mpBColors->insert(nIndex, ::basegfx::BColor::getEmptyBColor(), nCount);
				}
			}

			if(rSource.mpNormals && rSource.mpNormals->isUsed())
			{
				if(!mpNormals)
				{
					mpNormals = new NormalsArray3D(maPoints.count());
				}

				mpNormals->insert(nIndex, *rSource.mpNormals);
			}
			else
			{
				if(mpNormals)
				{
					mpNormals->insert(nIndex, ::basegfx::B3DVector::getEmptyVector(), nCount);
				}
			}

			if(rSource.mpTextureCoordiantes && rSource.mpTextureCoordiantes->isUsed())
			{
				if(!mpTextureCoordiantes)
				{
					mpTextureCoordiantes = new TextureCoordinate2D(maPoints.count());
				}

				mpTextureCoordiantes->insert(nIndex, *rSource.mpTextureCoordiantes);
			}
			else
			{
				if(mpTextureCoordiantes)
				{
					mpTextureCoordiantes->insert(nIndex, ::basegfx::B2DPoint::getEmptyPoint(), nCount);
				}
			}
		}
	}

	void remove(sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		if(nCount)
		{
			maPoints.remove(nIndex, nCount);
			invalidatePlaneNormal();

			if(mpBColors)
			{
				mpBColors->remove(nIndex, nCount);

				if(!mpBColors->isUsed())
				{
					delete mpBColors;
					mpBColors = 0L;
				}
			}

			if(mpNormals)
			{
				mpNormals->remove(nIndex, nCount);

				if(!mpNormals->isUsed())
				{
					delete mpNormals;
					mpNormals = 0L;
				}
			}

			if(mpTextureCoordiantes)
			{
				mpTextureCoordiantes->remove(nIndex, nCount);

				if(!mpTextureCoordiantes->isUsed())
				{
					delete mpTextureCoordiantes;
					mpTextureCoordiantes = 0L;
				}
			}
		}
	}

	void flip()
	{
		if(maPoints.count() > 1)
		{
			maPoints.flip();

			if(mbPlaneNormalValid)
			{
				// mirror plane normal
				maPlaneNormal = -maPlaneNormal;
			}

			if(mpBColors)
			{
				mpBColors->flip();
			}

			if(mpNormals)
			{
				mpNormals->flip();
			}

			if(mpTextureCoordiantes)
			{
				mpTextureCoordiantes->flip();
			}
		}
	}

	bool hasDoublePoints() const
	{
		if(mbIsClosed)
		{
			// check for same start and end point
			const sal_uInt32 nIndex(maPoints.count() - 1L);

			if(maPoints.getCoordinate(0L) == maPoints.getCoordinate(nIndex))
			{
				const bool bBColorEqual(!mpBColors || (mpBColors->getBColor(0L) == mpBColors->getBColor(nIndex)));

				if(bBColorEqual)
				{
					const bool bNormalsEqual(!mpNormals || (mpNormals->getNormal(0L) == mpNormals->getNormal(nIndex)));

					if(bNormalsEqual)
					{
						const bool bTextureCoordinatesEqual(!mpTextureCoordiantes || (mpTextureCoordiantes->getTextureCoordinate(0L) == mpTextureCoordiantes->getTextureCoordinate(nIndex)));

						if(bTextureCoordinatesEqual)
						{
							return true;
						}
					}
				}
			}
		}

		// test for range
		for(sal_uInt32 a(0L); a < maPoints.count() - 1L; a++)
		{
			if(maPoints.getCoordinate(a) == maPoints.getCoordinate(a + 1L))
			{
				const bool bBColorEqual(!mpBColors || (mpBColors->getBColor(a) == mpBColors->getBColor(a + 1L)));

				if(bBColorEqual)
				{
					const bool bNormalsEqual(!mpNormals || (mpNormals->getNormal(a) == mpNormals->getNormal(a + 1L)));

					if(bNormalsEqual)
					{
						const bool bTextureCoordinatesEqual(!mpTextureCoordiantes || (mpTextureCoordiantes->getTextureCoordinate(a) == mpTextureCoordiantes->getTextureCoordinate(a + 1L)));

						if(bTextureCoordinatesEqual)
						{
							return true;
						}
					}
				}
			}
		}

		return false;
	}

	void removeDoublePointsAtBeginEnd()
	{
		// Only remove DoublePoints at Begin and End when poly is closed
		if(mbIsClosed)
		{
			bool bRemove;

			do
			{
				bRemove = false;

				if(maPoints.count() > 1L)
				{
					const sal_uInt32 nIndex(maPoints.count() - 1L);
					bRemove = (maPoints.getCoordinate(0L) == maPoints.getCoordinate(nIndex));

					if(bRemove && mpBColors && !(mpBColors->getBColor(0L) == mpBColors->getBColor(nIndex)))
					{
						bRemove = false;
					}

					if(bRemove && mpNormals && !(mpNormals->getNormal(0L) == mpNormals->getNormal(nIndex)))
					{
						bRemove = false;
					}

					if(bRemove && mpTextureCoordiantes && !(mpTextureCoordiantes->getTextureCoordinate(0L) == mpTextureCoordiantes->getTextureCoordinate(nIndex)))
					{
						bRemove = false;
					}
				}

				if(bRemove)
				{
					const sal_uInt32 nIndex(maPoints.count() - 1L);
					remove(nIndex, 1L);
				}
			} while(bRemove);
		}
	}

	void removeDoublePointsWholeTrack()
	{
		sal_uInt32 nIndex(0L);

		// test as long as there are at least two points and as long as the index
		// is smaller or equal second last point
		while((maPoints.count() > 1L) && (nIndex <= maPoints.count() - 2L))
		{
			const sal_uInt32 nNextIndex(nIndex + 1L);
			bool bRemove(maPoints.getCoordinate(nIndex) == maPoints.getCoordinate(nNextIndex));

			if(bRemove && mpBColors && !(mpBColors->getBColor(nIndex) == mpBColors->getBColor(nNextIndex)))
			{
				bRemove = false;
			}

			if(bRemove && mpNormals && !(mpNormals->getNormal(nIndex) == mpNormals->getNormal(nNextIndex)))
			{
				bRemove = false;
			}

			if(bRemove && mpTextureCoordiantes && !(mpTextureCoordiantes->getTextureCoordinate(nIndex) == mpTextureCoordiantes->getTextureCoordinate(nNextIndex)))
			{
				bRemove = false;
			}

			if(bRemove)
			{
				// if next is same as index and the control vectors are unused, delete index
				remove(nIndex, 1L);
			}
			else
			{
				// if different, step forward
				nIndex++;
			}
		}
	}

	void transform(const ::basegfx::B3DHomMatrix& rMatrix)
	{
		maPoints.transform(rMatrix);

		// Here, it seems to be possible to transform a valid plane normal and to avoid
		// invalidation, but it's not true. If the transformation contains shears or e.g.
		// perspective projection, the orthogonality to the transformed plane will not
		// be preserved. It may be possible to test that at the matrix to not invalidate in
		// all cases or to extract a matrix which does not 'shear' the vector which is
		// a normal in this case. As long as this is not sure, i will just invalidate.
		invalidatePlaneNormal();
	}
};

//////////////////////////////////////////////////////////////////////////////

namespace basegfx
{
    namespace { struct DefaultPolygon : public rtl::Static< B3DPolygon::ImplType, 
                                                            DefaultPolygon > {}; }

	B3DPolygon::B3DPolygon() :
        mpPolygon(DefaultPolygon::get())
	{
	}

	B3DPolygon::B3DPolygon(const B3DPolygon& rPolygon) :
        mpPolygon(rPolygon.mpPolygon)
	{
	}

	B3DPolygon::B3DPolygon(const B3DPolygon& rPolygon, sal_uInt32 nIndex, sal_uInt32 nCount) :
        mpPolygon(ImplB3DPolygon(*rPolygon.mpPolygon, nIndex, nCount))
	{
        // TODO(P2): one extra temporary here (cow_wrapper copies
        // given ImplB3DPolygon into its internal impl_t wrapper type)
		OSL_ENSURE(nIndex + nCount > rPolygon.mpPolygon->count(), "B3DPolygon constructor outside range (!)");
	}

	B3DPolygon::~B3DPolygon()
	{
	}

	B3DPolygon& B3DPolygon::operator=(const B3DPolygon& rPolygon)
	{
		mpPolygon = rPolygon.mpPolygon;
		return *this;
	}

    void B3DPolygon::makeUnique()
    {
        mpPolygon.make_unique();
    }

	bool B3DPolygon::operator==(const B3DPolygon& rPolygon) const
	{
		if(mpPolygon.same_object(rPolygon.mpPolygon))
			return true;

		return (*mpPolygon == *rPolygon.mpPolygon);
	}

	bool B3DPolygon::operator!=(const B3DPolygon& rPolygon) const
	{
        return !(*this == rPolygon);
	}

	sal_uInt32 B3DPolygon::count() const
	{
		return mpPolygon->count();
	}

	basegfx::B3DPoint B3DPolygon::getB3DPoint(sal_uInt32 nIndex) const
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");
		
		return mpPolygon->getPoint(nIndex);
	}

	void B3DPolygon::setB3DPoint(sal_uInt32 nIndex, const basegfx::B3DPoint& rValue)
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");

		if(getB3DPoint(nIndex) != rValue)
			mpPolygon->setPoint(nIndex, rValue);
	}

	BColor B3DPolygon::getBColor(sal_uInt32 nIndex) const
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");
		
		return mpPolygon->getBColor(nIndex);
	}

	void B3DPolygon::setBColor(sal_uInt32 nIndex, const BColor& rValue)
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");

		if(mpPolygon->getBColor(nIndex) != rValue)
			mpPolygon->setBColor(nIndex, rValue);
	}

	bool B3DPolygon::areBColorsUsed() const
	{
		return mpPolygon->areBColorsUsed();
	}

	void B3DPolygon::clearBColors()
	{
		if(mpPolygon->areBColorsUsed())
			mpPolygon->clearBColors();
	}

	B3DVector B3DPolygon::getNormal() const
	{
		return mpPolygon->getNormal();
	}

	B3DVector B3DPolygon::getNormal(sal_uInt32 nIndex) const
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");
		
		return mpPolygon->getNormal(nIndex);
	}

	void B3DPolygon::setNormal(sal_uInt32 nIndex, const B3DVector& rValue)
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");

		if(mpPolygon->getNormal(nIndex) != rValue)
			mpPolygon->setNormal(nIndex, rValue);
	}

	void B3DPolygon::transformNormals(const B3DHomMatrix& rMatrix)
	{
		if(mpPolygon->areNormalsUsed() && !rMatrix.isIdentity())
			mpPolygon->transformNormals(rMatrix);
	}

	bool B3DPolygon::areNormalsUsed() const
	{
		return mpPolygon->areNormalsUsed();
	}

	void B3DPolygon::clearNormals()
	{
		if(mpPolygon->areNormalsUsed())
			mpPolygon->clearNormals();
	}

	B2DPoint B3DPolygon::getTextureCoordinate(sal_uInt32 nIndex) const
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");
		
		return mpPolygon->getTextureCoordinate(nIndex);
	}

	void B3DPolygon::setTextureCoordinate(sal_uInt32 nIndex, const B2DPoint& rValue)
	{
		OSL_ENSURE(nIndex < mpPolygon->count(), "B3DPolygon access outside range (!)");

		if(mpPolygon->getTextureCoordinate(nIndex) != rValue)
			mpPolygon->setTextureCoordinate(nIndex, rValue);
	}

	void B3DPolygon::transformTextureCoordiantes(const B2DHomMatrix& rMatrix)
	{
		if(mpPolygon->areTextureCoordinatesUsed() && !rMatrix.isIdentity())
			mpPolygon->transformTextureCoordinates(rMatrix);
	}

	bool B3DPolygon::areTextureCoordinatesUsed() const
	{
		return mpPolygon->areTextureCoordinatesUsed();
	}

	void B3DPolygon::clearTextureCoordinates()
	{
		if(mpPolygon->areTextureCoordinatesUsed())
			mpPolygon->clearTextureCoordinates();
	}

	void B3DPolygon::insert(sal_uInt32 nIndex, const ::basegfx::B3DPoint& rPoint, sal_uInt32 nCount)
	{
		OSL_ENSURE(nIndex <= mpPolygon->count(), "B3DPolygon Insert outside range (!)");
		
		if(nCount)
			mpPolygon->insert(nIndex, rPoint, nCount);
	}

	void B3DPolygon::append(const basegfx::B3DPoint& rPoint, sal_uInt32 nCount)
	{
		if(nCount)
			mpPolygon->insert(mpPolygon->count(), rPoint, nCount);
	}

	void B3DPolygon::insert(sal_uInt32 nIndex, const B3DPolygon& rPoly, sal_uInt32 nIndex2, sal_uInt32 nCount)
	{
		OSL_ENSURE(nIndex <= mpPolygon->count(), "B3DPolygon Insert outside range (!)");

		if(rPoly.count())
		{
			if(!nCount)
			{
				nCount = rPoly.count();
			}

			if(0L == nIndex2 && nCount == rPoly.count())
			{
				mpPolygon->insert(nIndex, *rPoly.mpPolygon);
			}
			else
			{
				OSL_ENSURE(nIndex2 + nCount <= rPoly.mpPolygon->count(), "B3DPolygon Insert outside range (!)");
				ImplB3DPolygon aTempPoly(*rPoly.mpPolygon, nIndex2, nCount);
				mpPolygon->insert(nIndex, aTempPoly);
			}
		}
	}

	void B3DPolygon::append(const B3DPolygon& rPoly, sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		if(rPoly.count())
		{
			if(!nCount)
			{
				nCount = rPoly.count();
			}

			if(0L == nIndex && nCount == rPoly.count())
			{
				mpPolygon->insert(mpPolygon->count(), *rPoly.mpPolygon);
			}
			else
			{
				OSL_ENSURE(nIndex + nCount <= rPoly.mpPolygon->count(), "B3DPolygon Append outside range (!)");
				ImplB3DPolygon aTempPoly(*rPoly.mpPolygon, nIndex, nCount);
				mpPolygon->insert(mpPolygon->count(), aTempPoly);
			}
		}
	}

	void B3DPolygon::remove(sal_uInt32 nIndex, sal_uInt32 nCount)
	{
		OSL_ENSURE(nIndex + nCount <= mpPolygon->count(), "B3DPolygon Remove outside range (!)");
		
		if(nCount)
			mpPolygon->remove(nIndex, nCount);
	}
	
	void B3DPolygon::clear()
	{
		mpPolygon = DefaultPolygon::get();
	}

	bool B3DPolygon::isClosed() const
	{
		return mpPolygon->isClosed();
	}

	void B3DPolygon::setClosed(bool bNew)
	{
		if(isClosed() != bNew)
			mpPolygon->setClosed(bNew);
	}

	void B3DPolygon::flip()
	{
		if(count() > 1)
			mpPolygon->flip();
	}

	bool B3DPolygon::hasDoublePoints() const
	{
		return (mpPolygon->count() > 1L && mpPolygon->hasDoublePoints());
	}

	void B3DPolygon::removeDoublePoints()
	{
		if(hasDoublePoints())
		{
			mpPolygon->removeDoublePointsAtBeginEnd();
			mpPolygon->removeDoublePointsWholeTrack();
		}
	}

	void B3DPolygon::transform(const basegfx::B3DHomMatrix& rMatrix)
	{
		if(mpPolygon->count() && !rMatrix.isIdentity())
		{
			mpPolygon->transform(rMatrix);
		}
	}
} // end of namespace basegfx

//////////////////////////////////////////////////////////////////////////////
// eof