xref: /aoo42x/main/basegfx/source/vector/b3dvector.cxx (revision 09dbbe93)

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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_basegfx.hxx"
#include <basegfx/vector/b3dvector.hxx>
#include <basegfx/matrix/b3dhommatrix.hxx>

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

namespace basegfx
{
	B3DVector& B3DVector::normalize()
	{
		double fLen(scalar(*this));

		if(!::basegfx::fTools::equalZero(fLen))
		{
			const double fOne(1.0);

			if(!::basegfx::fTools::equal(fOne, fLen))
			{
				fLen = sqrt(fLen);

				if(!::basegfx::fTools::equalZero(fLen))
				{
					mfX /= fLen;
					mfY /= fLen;
					mfZ /= fLen;
				}
			}
		}

		return *this;
	}

	B3DVector B3DVector::getPerpendicular(const B3DVector& rNormalizedVec) const
	{
		B3DVector aNew(*this);
		aNew = cross(aNew, rNormalizedVec);
		aNew.normalize();
		return aNew;
	}

	B3DVector B3DVector::getProjectionOnPlane(const B3DVector& rNormalizedPlane) const
	{
		B3DVector aNew(*this);
		aNew = cross(aNew, rNormalizedPlane);
		aNew = cross(aNew, rNormalizedPlane);

		aNew.mfX = mfX - aNew.mfX;
		aNew.mfY = mfY - aNew.mfY;
		aNew.mfZ = mfZ - aNew.mfZ;

		return aNew;
	}

	B3DVector& B3DVector::operator*=( const ::basegfx::B3DHomMatrix& rMat )
	{
		const double fTempX( rMat.get(0,0)*mfX + rMat.get(0,1)*mfY + rMat.get(0,2)*mfZ );
		const double fTempY( rMat.get(1,0)*mfX + rMat.get(1,1)*mfY + rMat.get(1,2)*mfZ );
		const double fTempZ( rMat.get(2,0)*mfX + rMat.get(2,1)*mfY + rMat.get(2,2)*mfZ );
		mfX = fTempX;
		mfY = fTempY;
		mfZ = fTempZ;

		return *this;
	}

	B3DVector operator*( const ::basegfx::B3DHomMatrix& rMat, const B3DVector& rVec )
	{
		B3DVector aRes( rVec );
		return aRes*=rMat;
	}

    bool areParallel( const B3DVector& rVecA, const B3DVector& rVecB )
    {
        // i think fastest is to compare relations, need no square or division
        if(!fTools::equal(rVecA.getX() * rVecB.getY(), rVecA.getY() * rVecB.getX()))
            return false;

        if(!fTools::equal(rVecA.getX() * rVecB.getZ(), rVecA.getZ() * rVecB.getX()))
			return false;

		return (fTools::equal(rVecA.getY() * rVecB.getZ(), rVecA.getZ() * rVecB.getY()));
    }

} // end of namespace basegfx

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