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-rw-r--r--basegfx/inc/basegfx/point/b2dhompoint.hxx239
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diff --git a/basegfx/inc/basegfx/point/b2dhompoint.hxx b/basegfx/inc/basegfx/point/b2dhompoint.hxx
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-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
-/*************************************************************************
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * Copyright 2000, 2010 Oracle and/or its affiliates.
- *
- * OpenOffice.org - a multi-platform office productivity suite
- *
- * This file is part of OpenOffice.org.
- *
- * OpenOffice.org is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License version 3
- * only, as published by the Free Software Foundation.
- *
- * OpenOffice.org is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU Lesser General Public License version 3 for more details
- * (a copy is included in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU Lesser General Public License
- * version 3 along with OpenOffice.org. If not, see
- * <http://www.openoffice.org/license.html>
- * for a copy of the LGPLv3 License.
- *
- ************************************************************************/
-
-#ifndef _BGFX_POINT_B2DHOMPOINT_HXX
-#define _BGFX_POINT_B2DHOMPOINT_HXX
-
-#include <basegfx/point/b2dpoint.hxx>
-#include <basegfx/basegfxdllapi.h>
-
-namespace basegfx
-{
- /** Basic homogen Point class with two double values and one homogen factor
-
- This class provides access to homogen coordinates in 2D.
- For this purpose all the operators which need to do specific
- action due to their homogenity are implemented here.
- The only caveat are member methods which are declared as const
- but do change the content. These are documented for that reason.
- The class is designed to provide homogenous coordinates without
- direct access to the homogen part (mfW). This is also the reason
- for leaving out the [] operators which return references to members.
-
- @see B2DTuple
- */
- class BASEGFX_DLLPUBLIC B2DHomPoint
- {
- protected:
- /// This member contains the coordinate part of the point
- ::basegfx::B2DTuple maTuple;
-
- /// This Member holds the homogenous part of the point
- double mfW;
-
- /** Test if this homogen point does have a homogenous part
-
- @return Returns true if this point has no homogenous part
- */
- bool implIsHomogenized() const;
-
- /** Remove homogenous part of this Point
-
- This method does necessary calculations to remove
- the evtl. homogenous part of this Point. This may
- change all members.
- */
- void implHomogenize();
-
- /** Test and on demand remove homogenous part
-
- This method tests if this Point does have a homogenous part
- and then evtl. takes actions to remove that part.
-
- @attention Even when this method is const it may change all
- members of this instance. This is due to the fact that changing
- the homogenous part of a homogenous point does from a mathematical
- point of view not change the point at all.
- */
- void implTestAndHomogenize() const;
-
- public:
- /** Create a homogen point
-
- The point is initialized to (0.0, 0.0)
- */
- B2DHomPoint()
- : maTuple(),
- mfW(1.0)
- {}
-
- /** Create a homogen point
-
- @param fX
- This parameter is used to initialize the X-coordinate
- of the Point. The homogenous part is initialized to 1.0.
-
- @param fY
- This parameter is used to initialize the Y-coordinate
- of the Point. The homogenous part is initialized to 1.0.
- */
- B2DHomPoint(double fX, double fY)
- : maTuple(fX, fY),
- mfW(1.0)
- {}
-
- /** Create a copy of a 2D Point
-
- @param rVec
- The 2D point which will be copied. The homogenous part
- is initialized to 1.0.
- */
- B2DHomPoint(const B2DPoint& rVec)
- : maTuple(rVec),
- mfW(1.0)
- {}
-
- /** Create a copy of a homogen point
-
- @param rVec
- The homogen point which will be copied. The homogenous part
- is copied, too.
- */
- B2DHomPoint(const B2DHomPoint& rVec)
- : maTuple(rVec.maTuple.getX(), rVec.maTuple.getY()),
- mfW(rVec.mfW)
- {}
-
- ~B2DHomPoint()
- {}
-
- /** Get a 2D point from this homogenous point
-
- This method normalizes this homogen point if necessary and
- returns the corresponding 2D point for this homogen point.
-
- @attention Even when this method is const it may change all
- members of this instance.
- */
- B2DPoint getB2DPoint() const;
-
- /** Get X-coordinate
-
- This method normalizes this homogen point if necessary and
- returns the corresponding X-coordinate for this homogen point.
-
- @attention Even when this method is const it may change all
- members of this instance.
- */
- double getX() const;
-
- /** Get Y-coordinate
-
- This method normalizes this homogen point if necessary and
- returns the corresponding Y-coordinate for this homogen point.
-
- @attention Even when this method is const it may change all
- members of this instance.
- */
- double getY() const;
-
- /** Set X-coordinate of the homogen point.
-
- This method sets the X-coordinate of the homogen point. If
- the point does have a homogenous part this is taken into account.
-
- @param fX
- The to-be-set X-coordinate without homogenous part.
- */
- void setX(double fX);
-
- /** Set Y-coordinate of the homogen point.
-
- This method sets the Y-coordinate of the homogen point. If
- the point does have a homogenous part this is taken into account.
-
- @param fY
- The to-be-set Y-coordinate without homogenous part.
- */
- void setY(double fY);
-
- // operators
- //////////////////////////////////////////////////////////////////////
-
- B2DHomPoint& operator+=( const B2DHomPoint& rPnt );
-
- B2DHomPoint& operator-=( const B2DHomPoint& rPnt );
-
- B2DHomPoint& operator*=(double t);
-
- B2DHomPoint& operator*=( const B2DHomMatrix& rMat );
-
- B2DHomPoint& operator/=(double t);
-
- B2DHomPoint& operator-(void);
-
- bool operator==( const B2DHomPoint& rPnt ) const;
-
- bool operator!=( const B2DHomPoint& rPnt ) const;
-
- B2DHomPoint& operator=( const B2DHomPoint& rPnt );
- };
-
- // external operators
- //////////////////////////////////////////////////////////////////////////
-
- BASEGFX_DLLPUBLIC B2DHomPoint minimum(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB);
-
- BASEGFX_DLLPUBLIC B2DHomPoint maximum(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB);
-
- BASEGFX_DLLPUBLIC B2DHomPoint absolute(const B2DHomPoint& rVec);
-
- BASEGFX_DLLPUBLIC B2DHomPoint interpolate(B2DHomPoint& rOld1, B2DHomPoint& rOld2, double t);
-
- BASEGFX_DLLPUBLIC B2DHomPoint average(B2DHomPoint& rOld1, B2DHomPoint& rOld2);
-
- BASEGFX_DLLPUBLIC B2DHomPoint average(B2DHomPoint& rOld1, B2DHomPoint& rOld2, B2DHomPoint& rOld3);
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator+(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB);
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator-(const B2DHomPoint& rVecA, const B2DHomPoint& rVecB);
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator*(const B2DHomPoint& rVec, double t);
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator*(double t, const B2DHomPoint& rVec);
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator*( const B2DHomMatrix& rMat, const B2DHomPoint& rPoint );
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator/(const B2DHomPoint& rVec, double t);
-
- BASEGFX_DLLPUBLIC B2DHomPoint operator/(double t, const B2DHomPoint& rVec);
-} // end of namespace basegfx
-
-#endif /* _BGFX_POINT_B2DHOMPOINT_HXX */
-
-/* vim:set shiftwidth=4 softtabstop=4 expandtab: */