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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#ifndef INCLUDED_BASEGFX_SOURCE_WORKBENCH_BEZIERCLIP_HXX
#define INCLUDED_BASEGFX_SOURCE_WORKBENCH_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 comparisons */
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 // INCLUDED_BASEGFX_SOURCE_WORKBENCH_BEZIERCLIP_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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