d57d9c6eed
2008/03/28 16:05:59 rt 1.5.88.1: #i87441# Change license header to LPGL v3.
96 lines
3 KiB
C++
96 lines
3 KiB
C++
/*************************************************************************
|
|
*
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* Copyright 2008 by Sun Microsystems, Inc.
|
|
*
|
|
* OpenOffice.org - a multi-platform office productivity suite
|
|
*
|
|
* $RCSfile: bezierclip.hxx,v $
|
|
* $Revision: 1.6 $
|
|
*
|
|
* 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 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 */
|