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/*************************************************************************
*
* $RCSfile: bezierclip.hxx,v $
*
* $Revision: 1.4 $
*
* last change: $Author: thb $ $Date: 2004-02-16 17:03:11 $
*
* 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 BASEGFX_BEZIERCLIP_HXX
#define BASEGFX_BEZIERCLIP_HXX
#include <vector>
struct Point2D
{
typedef double value_type;
Point2D( double _x, double _y ) : x(_x), y(_y) {}
Point2D() : x(), y() {}
double x;
double y;
};
struct Bezier
{
Point2D p0;
Point2D p1;
Point2D p2;
Point2D p3;
Point2D& operator[]( int i ) { return reinterpret_cast<Point2D*>(this)[i]; }
const Point2D& operator[]( int i ) const { return reinterpret_cast<const Point2D*>(this)[i]; }
};
struct FatLine
{
// line L through p1 and p4 in normalized implicit form
double a;
double b;
double c;
// the upper and lower distance from this line
double dMin;
double dMax;
};
template <typename DataType> DataType calcLineDistance( const DataType& a,
const DataType& b,
const DataType& c,
const DataType& x,
const DataType& y )
{
return a*x + b*y + c;
}
typedef ::std::vector< Point2D > Polygon2D;
/* little abs template */
template <typename NumType> NumType absval( NumType x )
{
return x<0 ? -x : x;
}
Polygon2D convexHull( const Polygon2D& rPoly );
// TODO: find proper epsilon here (try ::std::numeric_limits<NumType>::epsilon()?)!
#define DBL_EPSILON 1.0e-100
/* little approximate comparions */
template <typename NumType> bool tolZero( NumType n ) { return fabs(n) < DBL_EPSILON; }
template <typename NumType> bool tolEqual( NumType n1, NumType n2 ) { return tolZero(n1-n2); }
template <typename NumType> bool tolLessEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1<n2; }
template <typename NumType> bool tolGreaterEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1>n2; }
#endif /* BASEGFX_BEZIERCLIP_HXX */
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