/**************************************************************
 * 
 * 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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basegfx.hxx"
#include <basegfx/polygon/b3dpolypolygontools.hxx>
#include <basegfx/range/b3drange.hxx>
#include <basegfx/polygon/b3dpolypolygon.hxx>
#include <basegfx/polygon/b3dpolygon.hxx>
#include <basegfx/polygon/b3dpolygontools.hxx>
#include <numeric>
#include <basegfx/matrix/b3dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>
#include <osl/mutex.hxx>

//////////////////////////////////////////////////////////////////////////////
// predefines
#define nMinSegments sal_uInt32(1)
#define nMaxSegments sal_uInt32(512)

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

namespace basegfx
{
	namespace tools
	{
		// B3DPolyPolygon tools
		B3DRange getRange(const B3DPolyPolygon& rCandidate)
		{
			B3DRange aRetval;
			const sal_uInt32 nPolygonCount(rCandidate.count());

			for(sal_uInt32 a(0L); a < nPolygonCount; a++)
			{
				B3DPolygon aCandidate = rCandidate.getB3DPolygon(a);
				aRetval.expand(getRange(aCandidate));
			}

			return aRetval;
		}

		void applyLineDashing(const B3DPolyPolygon& rCandidate, const ::std::vector<double>& rDotDashArray, B3DPolyPolygon* pLineTarget, B3DPolyPolygon* pGapTarget, double fFullDashDotLen)
		{
			if(0.0 == fFullDashDotLen && rDotDashArray.size())
			{
				// calculate fFullDashDotLen from rDotDashArray
				fFullDashDotLen = ::std::accumulate(rDotDashArray.begin(), rDotDashArray.end(), 0.0);
			}

			if(rCandidate.count() && fFullDashDotLen > 0.0)
			{
				B3DPolyPolygon aLineTarget, aGapTarget;
	
				for(sal_uInt32 a(0L); a < rCandidate.count(); a++)
				{
					const B3DPolygon aCandidate(rCandidate.getB3DPolygon(a));
					
					applyLineDashing(
						aCandidate, 
						rDotDashArray, 
						pLineTarget ? &aLineTarget : 0, 
						pGapTarget ? &aGapTarget : 0, 
						fFullDashDotLen);

					if(pLineTarget)
					{
						pLineTarget->append(aLineTarget);
					}

					if(pGapTarget)
					{
						pGapTarget->append(aGapTarget);
					}
				}
			}
		}

		B3DPolyPolygon createUnitCubePolyPolygon()
		{
			static B3DPolyPolygon aRetval;
		    ::osl::Mutex m_mutex;

			if(!aRetval.count())
			{
				B3DPolygon aTemp;
				aTemp.append(B3DPoint(0.0, 0.0, 1.0));
				aTemp.append(B3DPoint(0.0, 1.0, 1.0));
				aTemp.append(B3DPoint(1.0, 1.0, 1.0));
				aTemp.append(B3DPoint(1.0, 0.0, 1.0));
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				aTemp.clear();
				aTemp.append(B3DPoint(0.0, 0.0, 0.0));
				aTemp.append(B3DPoint(0.0, 1.0, 0.0));
				aTemp.append(B3DPoint(1.0, 1.0, 0.0));
				aTemp.append(B3DPoint(1.0, 0.0, 0.0));
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				aTemp.clear();
				aTemp.append(B3DPoint(0.0, 0.0, 0.0));
				aTemp.append(B3DPoint(0.0, 0.0, 1.0));
				aRetval.append(aTemp);

				aTemp.clear();
				aTemp.append(B3DPoint(0.0, 1.0, 0.0));
				aTemp.append(B3DPoint(0.0, 1.0, 1.0));
				aRetval.append(aTemp);

				aTemp.clear();
				aTemp.append(B3DPoint(1.0, 1.0, 0.0));
				aTemp.append(B3DPoint(1.0, 1.0, 1.0));
				aRetval.append(aTemp);

				aTemp.clear();
				aTemp.append(B3DPoint(1.0, 0.0, 0.0));
				aTemp.append(B3DPoint(1.0, 0.0, 1.0));
				aRetval.append(aTemp);
			}

			return aRetval;
		}

		B3DPolyPolygon createUnitCubeFillPolyPolygon()
		{
			static B3DPolyPolygon aRetval;
		    ::osl::Mutex m_mutex;

			if(!aRetval.count())
			{
				B3DPolygon aTemp;

				// all points
				const B3DPoint A(0.0, 0.0, 0.0);
				const B3DPoint B(0.0, 1.0, 0.0);
				const B3DPoint C(1.0, 1.0, 0.0);
				const B3DPoint D(1.0, 0.0, 0.0);
				const B3DPoint E(0.0, 0.0, 1.0);
				const B3DPoint F(0.0, 1.0, 1.0);
				const B3DPoint G(1.0, 1.0, 1.0);
				const B3DPoint H(1.0, 0.0, 1.0);

				// create bottom
				aTemp.append(D);
				aTemp.append(A);
				aTemp.append(E);
				aTemp.append(H);
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				// create front
				aTemp.clear();
				aTemp.append(B);
				aTemp.append(A);
				aTemp.append(D);
				aTemp.append(C);
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				// create left
				aTemp.clear();
				aTemp.append(E);
				aTemp.append(A);
				aTemp.append(B);
				aTemp.append(F);
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				// create top
				aTemp.clear();
				aTemp.append(C);
				aTemp.append(G);
				aTemp.append(F);
				aTemp.append(B);
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				// create right
				aTemp.clear();
				aTemp.append(H);
				aTemp.append(G);
				aTemp.append(C);
				aTemp.append(D);
				aTemp.setClosed(true);
				aRetval.append(aTemp);

				// create back
				aTemp.clear();
				aTemp.append(F);
				aTemp.append(G);
				aTemp.append(H);
				aTemp.append(E);
				aTemp.setClosed(true);
				aRetval.append(aTemp);
			}

			return aRetval;
		}

		B3DPolyPolygon createCubePolyPolygonFromB3DRange( const B3DRange& rRange)
		{
			B3DPolyPolygon aRetval;

			if(!rRange.isEmpty())
			{
				aRetval = createUnitCubePolyPolygon();
				B3DHomMatrix aTrans;
				aTrans.scale(rRange.getWidth(), rRange.getHeight(), rRange.getDepth());
				aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
				aRetval.transform(aTrans);
				aRetval.removeDoublePoints();
			}

			return aRetval;
		}

		B3DPolyPolygon createCubeFillPolyPolygonFromB3DRange( const B3DRange& rRange)
		{
			B3DPolyPolygon aRetval;

			if(!rRange.isEmpty())
			{
				aRetval = createUnitCubeFillPolyPolygon();
				B3DHomMatrix aTrans;
				aTrans.scale(rRange.getWidth(), rRange.getHeight(), rRange.getDepth());
				aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
				aRetval.transform(aTrans);
				aRetval.removeDoublePoints();
			}

			return aRetval;
		}

		// helper for getting the 3D Point from given cartesian coordiantes. fVer is defined from
		// [F_PI2 .. -F_PI2], fHor from [0.0 .. F_2PI]
		inline B3DPoint getPointFromCartesian(double fVer, double fHor)
		{
			const double fCosHor(cos(fHor));
			return B3DPoint(fCosHor * cos(fVer), sin(fHor), fCosHor * -sin(fVer));
		}

		B3DPolyPolygon createUnitSpherePolyPolygon(
			sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
			double fVerStart, double fVerStop,
			double fHorStart, double fHorStop)
		{
			B3DPolyPolygon aRetval;
			sal_uInt32 a, b;

			if(!nHorSeg)
			{
				nHorSeg = fround(fabs(fHorStop - fHorStart) / (F_2PI / 24.0));
			}

            // min/max limitations
            nHorSeg = ::std::min(nMaxSegments, ::std::max(nMinSegments, nHorSeg));

			if(!nVerSeg)
			{
				nVerSeg = fround(fabs(fVerStop - fVerStart) / (F_2PI / 24.0));
			}

            // min/max limitations
            nVerSeg = ::std::min(nMaxSegments, ::std::max(nMinSegments, nVerSeg));

			// create constants
			const double fVerDiffPerStep((fVerStop - fVerStart) / (double)nVerSeg);
			const double fHorDiffPerStep((fHorStop - fHorStart) / (double)nHorSeg);
			bool bHorClosed(fTools::equal(fHorStop - fHorStart, F_2PI));
			bool bVerFromTop(fTools::equal(fVerStart, F_PI2));
			bool bVerToBottom(fTools::equal(fVerStop, -F_PI2));

			// create horizontal rings
			const sal_uInt32 nLoopVerInit(bVerFromTop ? 1L : 0L);
			const sal_uInt32 nLoopVerLimit(bVerToBottom ? nVerSeg : nVerSeg + 1L);
			const sal_uInt32 nLoopHorLimit(bHorClosed ? nHorSeg : nHorSeg + 1L);

			for(a = nLoopVerInit; a < nLoopVerLimit; a++)
			{
				const double fVer(fVerStart + ((double)(a) * fVerDiffPerStep));
				B3DPolygon aNew;

				for(b = 0L; b < nLoopHorLimit; b++)
				{
					const double fHor(fHorStart + ((double)(b) * fHorDiffPerStep));
					aNew.append(getPointFromCartesian(fHor, fVer));
				}

				aNew.setClosed(bHorClosed);
				aRetval.append(aNew);
			}

			// create vertical half-rings
			for(a = 0L; a < nLoopHorLimit; a++)
			{
				const double fHor(fHorStart + ((double)(a) * fHorDiffPerStep));
				B3DPolygon aNew;

				if(bVerFromTop)
				{
					aNew.append(B3DPoint(0.0, 1.0, 0.0));
				}

				for(b = nLoopVerInit; b < nLoopVerLimit; b++)
				{
					const double fVer(fVerStart + ((double)(b) * fVerDiffPerStep));
					aNew.append(getPointFromCartesian(fHor, fVer));
				}

				if(bVerToBottom)
				{
					aNew.append(B3DPoint(0.0, -1.0, 0.0));
				}

				aRetval.append(aNew);
			}

			return aRetval;
		}
		
		B3DPolyPolygon createSpherePolyPolygonFromB3DRange( const B3DRange& rRange, 
			sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
			double fVerStart, double fVerStop,
			double fHorStart, double fHorStop)
		{
			B3DPolyPolygon aRetval(createUnitSpherePolyPolygon(nHorSeg, nVerSeg, fVerStart, fVerStop, fHorStart, fHorStop));

			if(aRetval.count())
			{
				// move and scale whole construct which is now in [-1.0 .. 1.0] in all directions
				B3DHomMatrix aTrans;
				aTrans.translate(1.0, 1.0, 1.0);
				aTrans.scale(rRange.getWidth() / 2.0, rRange.getHeight() / 2.0, rRange.getDepth() / 2.0);
				aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
				aRetval.transform(aTrans);
			}

			return aRetval;
		}

		B3DPolyPolygon createUnitSphereFillPolyPolygon(
			sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
			bool bNormals,
			double fVerStart, double fVerStop,
			double fHorStart, double fHorStop)
		{
			B3DPolyPolygon aRetval;

			if(!nHorSeg)
			{
				nHorSeg = fround(fabs(fHorStop - fHorStart) / (F_2PI / 24.0));
			}

            // min/max limitations
            nHorSeg = ::std::min(nMaxSegments, ::std::max(nMinSegments, nHorSeg));

			if(!nVerSeg)
			{
				nVerSeg = fround(fabs(fVerStop - fVerStart) / (F_2PI / 24.0));
			}

            // min/max limitations
            nVerSeg = ::std::min(nMaxSegments, ::std::max(nMinSegments, nVerSeg));

			// vertical loop
			for(sal_uInt32 a(0L); a < nVerSeg; a++)
			{
				const double fVer(fVerStart + (((fVerStop - fVerStart) * a) / nVerSeg));
				const double fVer2(fVerStart + (((fVerStop - fVerStart) * (a + 1)) / nVerSeg));

				// horizontal loop
				for(sal_uInt32 b(0L); b < nHorSeg; b++)
				{
					const double fHor(fHorStart + (((fHorStop - fHorStart) * b) / nHorSeg));
					const double fHor2(fHorStart + (((fHorStop - fHorStart) * (b + 1)) / nHorSeg));
					B3DPolygon aNew;

					aNew.append(getPointFromCartesian(fHor, fVer));
					aNew.append(getPointFromCartesian(fHor2, fVer));
					aNew.append(getPointFromCartesian(fHor2, fVer2));
					aNew.append(getPointFromCartesian(fHor, fVer2));

					if(bNormals)
					{
						for(sal_uInt32 c(0L); c < aNew.count(); c++)
						{
							aNew.setNormal(c, ::basegfx::B3DVector(aNew.getB3DPoint(c)));
						}
					}

					aNew.setClosed(true);
					aRetval.append(aNew);
				}
			}

			return aRetval;
		}
		
		B3DPolyPolygon createSphereFillPolyPolygonFromB3DRange( const B3DRange& rRange, 
			sal_uInt32 nHorSeg, sal_uInt32 nVerSeg,
			bool bNormals,
			double fVerStart, double fVerStop,
			double fHorStart, double fHorStop)
		{
			B3DPolyPolygon aRetval(createUnitSphereFillPolyPolygon(nHorSeg, nVerSeg, bNormals, fVerStart, fVerStop, fHorStart, fHorStop));

			if(aRetval.count())
			{
				// move and scale whole construct which is now in [-1.0 .. 1.0] in all directions
				B3DHomMatrix aTrans;
				aTrans.translate(1.0, 1.0, 1.0);
				aTrans.scale(rRange.getWidth() / 2.0, rRange.getHeight() / 2.0, rRange.getDepth() / 2.0);
				aTrans.translate(rRange.getMinX(), rRange.getMinY(), rRange.getMinZ());
				aRetval.transform(aTrans);
			}

			return aRetval;
		}

		B3DPolyPolygon applyDefaultNormalsSphere( const B3DPolyPolygon& rCandidate, const B3DPoint& rCenter)
		{
			B3DPolyPolygon aRetval;

			for(sal_uInt32 a(0L); a < rCandidate.count(); a++)
			{
				aRetval.append(applyDefaultNormalsSphere(rCandidate.getB3DPolygon(a), rCenter));
			}

			return aRetval;
		}

		B3DPolyPolygon invertNormals( const B3DPolyPolygon& rCandidate)
		{
			B3DPolyPolygon aRetval;

			for(sal_uInt32 a(0L); a < rCandidate.count(); a++)
			{
				aRetval.append(invertNormals(rCandidate.getB3DPolygon(a)));
			}

			return aRetval;
		}

		B3DPolyPolygon applyDefaultTextureCoordinatesParallel( const B3DPolyPolygon& rCandidate, const B3DRange& rRange, bool bChangeX, bool bChangeY)
		{
			B3DPolyPolygon aRetval;

			for(sal_uInt32 a(0L); a < rCandidate.count(); a++)
			{
				aRetval.append(applyDefaultTextureCoordinatesParallel(rCandidate.getB3DPolygon(a), rRange, bChangeX, bChangeY));
			}

			return aRetval;
		}

		B3DPolyPolygon applyDefaultTextureCoordinatesSphere( const B3DPolyPolygon& rCandidate, const B3DPoint& rCenter, bool bChangeX, bool bChangeY)
		{
			B3DPolyPolygon aRetval;

			for(sal_uInt32 a(0L); a < rCandidate.count(); a++)
			{
				aRetval.append(applyDefaultTextureCoordinatesSphere(rCandidate.getB3DPolygon(a), rCenter, bChangeX, bChangeY));
			}

			return aRetval;
		}

		bool isInside(const B3DPolyPolygon& rCandidate, const B3DPoint& rPoint, bool bWithBorder)
		{
			const sal_uInt32 nPolygonCount(rCandidate.count());

			if(1L == nPolygonCount)
			{
				return isInside(rCandidate.getB3DPolygon(0), rPoint, bWithBorder);
			}
			else
			{
				sal_Int32 nInsideCount(0);

				for(sal_uInt32 a(0); a < nPolygonCount; a++)
				{
					const B3DPolygon aPolygon(rCandidate.getB3DPolygon(a));
					const bool bInside(isInside(aPolygon, rPoint, bWithBorder));

					if(bInside)
					{
						nInsideCount++;
					}
				}

				return (nInsideCount % 2L);
			}
		}

		//////////////////////////////////////////////////////////////////////
		// comparators with tolerance for 3D PolyPolygons

		bool equal(const B3DPolyPolygon& rCandidateA, const B3DPolyPolygon& rCandidateB, const double& rfSmallValue)
		{
			const sal_uInt32 nPolygonCount(rCandidateA.count());

			if(nPolygonCount != rCandidateB.count())
				return false;

			for(sal_uInt32 a(0); a < nPolygonCount; a++)
			{
				const B3DPolygon aCandidate(rCandidateA.getB3DPolygon(a));

				if(!equal(aCandidate, rCandidateB.getB3DPolygon(a), rfSmallValue))
					return false;
			}

			return true;
		}

		bool equal(const B3DPolyPolygon& rCandidateA, const B3DPolyPolygon& rCandidateB)
		{
			const double fSmallValue(fTools::getSmallValue());

			return equal(rCandidateA, rCandidateB, fSmallValue);
		}

	} // end of namespace tools
} // end of namespace basegfx

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

// eof