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/*************************************************************************
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: b2dlinegeometry.hxx,v $
*
* $Revision: 1.3 $
*
* last change: $Author: rt $ $Date: 2005-09-07 20:27:30 $
*
* The Contents of this file are made available subject to
* the terms of GNU Lesser General Public License Version 2.1.
*
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2005 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
*
************************************************************************/
#ifndef _BGFX_POLYGON_B2DLINEGEOMETRY_HXX
#define _BGFX_POLYGON_B2DLINEGEOMETRY_HXX
#ifndef _SAL_TYPES_H_
#include <sal/types.h>
#endif
#ifndef _BGFX_NUMERIC_FTOOLS_HXX
#include <basegfx/numeric/ftools.hxx>
#endif
#ifndef _BGFX_POLYGON_B2DPOLYPOLYGON_HXX
#include <basegfx/polygon/b2dpolypolygon.hxx>
#endif
#ifndef _BGFX_POLYGON_B2DPOLYGON_HXX
#include <basegfx/polygon/b2dpolygon.hxx>
#endif
//////////////////////////////////////////////////////////////////////////////
namespace basegfx
{
namespace tools
{
/** Descriptor for type of Line Joint
*/
enum B2DLineJoin
{
B2DLINEJOIN_NONE, // no rounding
B2DLINEJOIN_MIDDLE, // calc middle value between joints
B2DLINEJOIN_BEVEL, // join edges with line
B2DLINEJOIN_MITER, // extend till cut
B2DLINEJOIN_ROUND // create arc
};
// create area geometry for given polygon. Edges are joined using the given
// join type. fHalfLineWidth defines the relative width.
// fDegreeStepWidth is used when rounding edges.
// fMiterMinimumAngle is used to define when miter is forced to bevel.
// All created polygons will be positively or neuteral oriented and free of
// self intersections.
B2DPolyPolygon createAreaGeometryForPolygon(
const B2DPolygon& rCandidate,
double fHalfLineWidth,
B2DLineJoin eJoin,
double fDegreeStepWidth = (10.0 * F_PI180),
double fMiterMinimumAngle = (15.0 * F_PI180));
// create line start/end geometry element, mostly arrows and things like that.
// rCandidate is the polygon which needs to get that line ends and needs to have
// two points at least.
// rArrow is the line start/end geometry. It is assumed that the tip is pointing
// upwards. Result will be rotated and scaled to fit.
// bStart describes if creation is for start or end of candidate.
// fWidth defines the size of the element, it's describing the target width in X
// of the arrow.
// fDockingPosition needs to be in [0.0 ..1.0] range, where 0.0 means that the tip
// of the arrow will be aligned with the polygon start, 1.0 means the bottom. The
// default of 0.5 describes a centered arrow.
// With pConsumedLength it is possible to get back how much from the candidate
// geometry is overlapped by the creted element.
B2DPolyPolygon createAreaGeometryForLineStartEnd(
const B2DPolygon& rCandidate,
const B2DPolyPolygon& rArrow,
bool bStart,
double fWidth,
double fDockingPosition = 0.5, // 0->top, 1->bottom
double* pConsumedLength = 0L);
} // end of namespace tools
} // end of namespace basegfx
//////////////////////////////////////////////////////////////////////////////
#endif /* _BGFX_POLYGON_B2DLINEGEOMETRY_HXX */
// eof
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