diff options
Diffstat (limited to 'basegfx/source/workbench/bezierclip.hxx')
| -rw-r--r-- | basegfx/source/workbench/bezierclip.hxx | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/basegfx/source/workbench/bezierclip.hxx b/basegfx/source/workbench/bezierclip.hxx new file mode 100644 index 000000000000..0322354e9e9b --- /dev/null +++ b/basegfx/source/workbench/bezierclip.hxx @@ -0,0 +1,127 @@ +/************************************************************************* + * + * $RCSfile: bezierclip.hxx,v $ + * + * $Revision: 1.1 $ + * + * last change: $Author: thb $ $Date: 2003-03-06 18:57:48 $ + * + * 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 |