xref: /aoo42x/main/basegfx/source/point/b2dhompoint.cxx (revision 09dbbe93)

/**************************************************************
 *
 * 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 <basegfx/point/b2dhompoint.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
#include <basegfx/numeric/ftools.hxx>

namespace basegfx
{
	bool B2DHomPoint::implIsHomogenized() const
	{
		const double fOne(1.0);
		return ::basegfx::fTools::equal(fOne, mfW);
	}

	void B2DHomPoint::implHomogenize()
	{
		const double fFactor(1.0 / mfW);
		maTuple.setX(maTuple.getX() * fFactor);
		maTuple.setY(maTuple.getY() * fFactor);
		mfW = 1.0;
	}

	void B2DHomPoint::implTestAndHomogenize() const
	{
		if(!implIsHomogenized())
			((B2DHomPoint*)this)->implHomogenize();
	}

	B2DPoint B2DHomPoint::getB2DPoint() const
	{
		implTestAndHomogenize();
		return B2DPoint(maTuple.getX(), maTuple.getY());
	}

	double B2DHomPoint::getX() const
	{
		implTestAndHomogenize();
		return maTuple.getX();
	}

	double B2DHomPoint::getY() const
	{
		implTestAndHomogenize();
		return maTuple.getY();
	}

	void B2DHomPoint::setX(double fX)
	{
		maTuple.setX(implIsHomogenized() ? fX : fX * mfW );
	}

	void B2DHomPoint::setY(double fY)
	{
		maTuple.setY(implIsHomogenized() ? fY : fY * mfW );
	}

	B2DHomPoint& B2DHomPoint::operator+=( const B2DHomPoint& rPnt )
	{
		maTuple.setX(getX() * rPnt.mfW + rPnt.getX() * mfW);
		maTuple.setY(getY() * rPnt.mfW + rPnt.getY() * mfW);
		mfW = mfW * rPnt.mfW;

		return *this;
	}

	B2DHomPoint& B2DHomPoint::operator-=( const B2DHomPoint& rPnt )
	{
		maTuple.setX(getX() * rPnt.mfW - rPnt.getX() * mfW);
		maTuple.setY(getY() * rPnt.mfW - rPnt.getY() * mfW);
		mfW = mfW * rPnt.mfW;

		return *this;
	}

	B2DHomPoint& B2DHomPoint::operator*=(double t)
	{
		if(!::basegfx::fTools::equalZero(t))
		{
			mfW /= t;
		}

		return *this;
	}

	B2DHomPoint& B2DHomPoint::operator*=( const B2DHomMatrix& rMat )
	{
		const double fTempX( rMat.get(0,0)*maTuple.getX() +
							rMat.get(0,1)*maTuple.getY() +
							rMat.get(0,2)*mfW );

		const double fTempY( rMat.get(1,0)*maTuple.getX() +
							rMat.get(1,1)*maTuple.getY() +
							rMat.get(1,2)*mfW );

		const double fTempZ( rMat.get(2,0)*maTuple.getX() +
							rMat.get(2,1)*maTuple.getY() +
							rMat.get(2,2)*mfW );
		maTuple.setX( fTempX );
		maTuple.setY( fTempY );
		mfW = fTempZ;

		return *this;
	}

	B2DHomPoint& B2DHomPoint::operator/=(double t)
	{
		mfW *= t;
		return *this;
	}

	B2DHomPoint& B2DHomPoint::operator-(void)
	{
		mfW = -mfW;
		return *this;
	}

	bool B2DHomPoint::operator==( const B2DHomPoint& rPnt ) const
	{
		implTestAndHomogenize();
		return (maTuple == rPnt.maTuple);
	}

	bool B2DHomPoint::operator!=( const B2DHomPoint& rPnt ) const
	{
		implTestAndHomogenize();
		return (maTuple != rPnt.maTuple);
	}

	B2DHomPoint& B2DHomPoint::operator=( const B2DHomPoint& rPnt )
	{
		maTuple = rPnt.maTuple;
		mfW = rPnt.mfW;
		return *this;
	}

	B2DHomPoint minimum(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB)
	{
		B2DHomPoint aMin(
			(rVecB.getX() < rVecA.getX()) ? rVecB.getX() : rVecA.getX(),
			(rVecB.getY() < rVecA.getY()) ? rVecB.getY() : rVecA.getY());
		return aMin;
	}

	B2DHomPoint maximum(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB)
	{
		B2DHomPoint aMax(
			(rVecB.getX() > rVecA.getX()) ? rVecB.getX() : rVecA.getX(),
			(rVecB.getY() > rVecA.getY()) ? rVecB.getY() : rVecA.getY());
		return aMax;
	}
	B2DHomPoint absolute(const B2DHomPoint& rVec)
	{
		B2DHomPoint aAbs(
			(0.0 > rVec.getX()) ? -rVec.getX() : rVec.getX(),
			(0.0 > rVec.getY()) ? -rVec.getY() : rVec.getY());
		return aAbs;
	}

	B2DHomPoint interpolate(B2DHomPoint& rOld1, B2DHomPoint& rOld2, double t)
	{
		B2DHomPoint aInt(
			((rOld2.getX() - rOld1.getX()) * t) + rOld1.getX(),
			((rOld2.getY() - rOld1.getY()) * t) + rOld1.getY());
		return aInt;
	}

	B2DHomPoint average(B2DHomPoint& rOld1, B2DHomPoint& rOld2)
	{
		B2DHomPoint aAvg(
			(rOld1.getX() + rOld2.getX()) * 0.5,
			(rOld1.getY() + rOld2.getY()) * 0.5);
		return aAvg;
	}

	B2DHomPoint average(B2DHomPoint& rOld1, B2DHomPoint& rOld2, B2DHomPoint& rOld3)
	{
		B2DHomPoint aAvg(
			(rOld1.getX() + rOld2.getX() + rOld3.getX()) * (1.0 / 3.0),
			(rOld1.getY() + rOld2.getY() + rOld3.getY()) * (1.0 / 3.0));
		return aAvg;
	}

	B2DHomPoint operator+(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB)
	{
		B2DHomPoint aSum(rVecA);
		aSum += rVecB;
		return aSum;
	}

	B2DHomPoint operator-(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB)
	{
		B2DHomPoint aSub(rVecA);
		aSub -= rVecB;
		return aSub;
	}

	B2DHomPoint operator*(const B2DHomPoint& rVec, double t)
	{
		B2DHomPoint aNew(rVec);
		aNew *= t;
		return aNew;
	}

	B2DHomPoint operator*(double t, const B2DHomPoint& rVec)
	{
		B2DHomPoint aNew(rVec);
		aNew *= t;
		return aNew;
	}

	B2DHomPoint operator*( const B2DHomMatrix& rMat, const B2DHomPoint& rPoint )
	{
		B2DHomPoint aNew(rPoint);
		return aNew*=rMat;
	}

	B2DHomPoint operator/(const B2DHomPoint& rVec, double t)
	{
		B2DHomPoint aNew(rVec);
		aNew /= t;
		return aNew;
	}

	B2DHomPoint operator/(double t, const B2DHomPoint& rVec)
	{
		B2DHomPoint aNew(rVec);
		aNew /= t;
		return aNew;
	}
} // end of namespace basegfx

// eof