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/*************************************************************************
*
* $RCSfile: b2dvector.hxx,v $
*
* $Revision: 1.2 $
*
* last change: $Author: aw $ $Date: 2003-11-05 12:25:46 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (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.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
#ifndef _BGFX_VECTOR_B2DVECTOR_HXX
#define _BGFX_VECTOR_B2DVECTOR_HXX
#ifndef _BGFX_TUPLE_B2DTUPLE_HXX
#include <basegfx/tuple/b2dtuple.hxx>
#endif
namespace basegfx
{
namespace matrix
{
// predeclaration
class B2DHomMatrix;
} // end of namespace matrix;
namespace vector
{
/** Descriptor for the mathematical orientations of two 2D Vectors
*/
enum B2DVectorOrientation
{
/// mathematically positive oriented
ORIENTATION_POSITIVE = 0,
/// mathematically negative oriented
ORIENTATION_NEGATIVE,
/// mathematically neutral, thus parallel
ORIENTATION_NEUTRAL
};
/** Base Point class with two double values
This class derives all operators and common handling for
a 2D data class from B2DTuple. All necessary extensions
which are special for 2D Vectors are added here.
@see B2DTuple
*/
class B2DVector : public tuple::B2DTuple
{
public:
/** Create a 2D Vector
@param fVal
This parameter is used to initialize the coordinate
part of the 2D Vector.
*/
B2DVector(double fVal = 0.0)
: B2DTuple(fVal)
{}
/** Create a 2D Vector
@param fX
This parameter is used to initialize the X-coordinate
of the 2D Vector.
@param fY
This parameter is used to initialize the Y-coordinate
of the 2D Vector.
*/
B2DVector(double fX, double fY)
: B2DTuple(fX, fY)
{}
/** Create a copy of a 2D Vector
@param rVec
The 2D Vector which will be copied.
*/
B2DVector(const B2DVector& rVec)
: B2DTuple(rVec)
{}
/** constructor with tuple to allow copy-constructing
from B2DTuple-based classes
*/
B2DVector(const B2DTuple& rTuple)
: B2DTuple(rTuple)
{}
~B2DVector()
{}
/** assignment operator to allow assigning the results
of B2DTuple calculations
*/
B2DVector& operator=( const B2DTuple& rVec );
/** Calculate the length of this 2D Vector
@return The Length of the 2D Vector
*/
double getLength() const;
/** Set the length of this 2D Vector
@param fLen
The to be achieved length of the 2D Vector
*/
B2DVector& setLength(double fLen);
/** Normalize this 2D Vector
The length of the 2D Vector is set to 1.0
*/
B2DVector& normalize();
/** Test if this 2D Vector is normalized
@return
sal_True if lenth of vector is equal to 1.0
sal_False else
*/
sal_Bool isNormalized() const;
/** Calculate the Scalar with another 2D Vector
@param rVec
The second 2D Vector
@return
The Scalar value of the two involved 2D Vectors
*/
double scalar( const B2DVector& rVec ) const;
/** Transform vector by given transformation matrix.
Since this is a vector, translational components of the
matrix are disregarded.
*/
B2DVector& operator*=( const matrix::B2DHomMatrix& rMat );
static const B2DVector& getEmptyVector();
};
// external operators
//////////////////////////////////////////////////////////////////////////
/** Calculate the orientation to another 2D Vector
@param rVecA
The first 2D Vector
@param rVecB
The second 2D Vector
@return
The mathematical Orientation of the two involved 2D Vectors
*/
B2DVectorOrientation getOrientation( const B2DVector& rVecA, const B2DVector& rVecB );
/** Calculate a perpendicular 2D Vector to the given one
@param rVec
The source 2D Vector
@attention This only works if the given 2D Vector is normalized.
@return
A 2D Vector perpendicular to the one given in parameter rVec
*/
B2DVector getPerpendicular( const B2DVector& rNormalizedVec );
/** Test two vectors which need not to be normalized for parallelism
@param rVecA
The first 2D Vector
@param rVecB
The second 2D Vector
@return
sal_Bool if the two values are parallel. Also sal_True if
one of the vectors is empty.
*/
sal_Bool areParallel( const B2DVector& rVecA, const B2DVector& rVecB );
/** Transform vector by given transformation matrix.
Since this is a vector, translational components of the
matrix are disregarded.
*/
B2DVector operator*( const matrix::B2DHomMatrix& rMat, const B2DVector& rVec );
} // end of namespace vector
} // end of namespace basegfx
#endif // _BGFX_VECTOR_B2DVECTOR_HXX
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