40bab1e31c
Change-Id: Ib6694ec77c275c9a604abfa7d87df6ab262449b6 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128250 Tested-by: Hossein <hossein@libreoffice.org> Reviewed-by: Hossein <hossein@libreoffice.org>
84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#pragma once
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#include <vector>
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struct Point2D
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{
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typedef double value_type;
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Point2D( double _x, double _y ) : x(_x), y(_y) {}
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Point2D() : x(), y() {}
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double x;
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double y;
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};
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struct Bezier
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{
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Point2D p0;
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Point2D p1;
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Point2D p2;
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Point2D p3;
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Point2D& operator[]( int i ) { return reinterpret_cast<Point2D*>(this)[i]; }
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const Point2D& operator[]( int i ) const { return reinterpret_cast<const Point2D*>(this)[i]; }
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};
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struct FatLine
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{
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// line L through p1 and p4 in normalized implicit form
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double a;
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double b;
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double c;
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// the upper and lower distance from this line
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double dMin;
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double dMax;
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};
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template <typename DataType> DataType calcLineDistance( const DataType& a,
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const DataType& b,
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const DataType& c,
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const DataType& x,
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const DataType& y )
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{
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return a*x + b*y + c;
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}
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typedef std::vector< Point2D > Polygon2D;
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/* little abs template */
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template <typename NumType> NumType absval( NumType x )
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{
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return x<0 ? -x : x;
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}
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Polygon2D convexHull( const Polygon2D& rPoly );
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// TODO: find proper epsilon here (try std::numeric_limits<NumType>::epsilon()?)!
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constexpr auto DBL_EPSILON = 1.0e-100;
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/* little approximate comparisons */
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template <typename NumType> bool tolZero( NumType n ) { return fabs(n) < DBL_EPSILON; }
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template <typename NumType> bool tolEqual( NumType n1, NumType n2 ) { return tolZero(n1-n2); }
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template <typename NumType> bool tolLessEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1<n2; }
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template <typename NumType> bool tolGreaterEqual( NumType n1, NumType n2 ) { return tolEqual(n1,n2) || n1>n2; }
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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