155 lines
2.7 KiB
C
155 lines
2.7 KiB
C
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2008, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin {center}] [\end {center}}]
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//[TOC] [\tableofcontents]
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//[ue] [\"u]
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//[ae] [\"a]
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//[oe] [\"o]
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//[x] [$\times $]
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//[->] [$\rightarrow $]
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//[pow] [\verb+^+]
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[1] Headerfile
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Oktober 2014 - Maerz 2015, S. Schroeer for master thesis.
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[TOC]
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1 Introduction
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2 Defines and Includes
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*/
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#ifndef ANGLE_H_
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#define ANGLE_H_
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#include <gmpxx.h>
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#include "Vector2D.h"
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namespace temporalalgebra{
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namespace mregionops2 {
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class Angle
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{
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public:
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Angle()
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{
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angle = Infinite;
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}
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Angle(mpq_class a)
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{
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angle = a;
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Normalize();
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}
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Angle(Vector2D v)
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{
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// use sin2 = y2 / (x2+y2)
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// sin is a reelle number, not exact
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mpq_class xSquare = v.GetX() * v.GetX();
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mpq_class ySquare = v.GetY() * v.GetY();
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if (v.GetX() >= 0)
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{
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if (v.GetY() >= 0)
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{
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// Quadrant 1
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angle = ySquare / (xSquare + ySquare);
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}
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else
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{
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// Quadrant 4
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angle = 3 + xSquare / (xSquare + ySquare);
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}
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}
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else
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{
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if (v.GetY() >= 0)
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{
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// Quadrant 2
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angle = 1 + xSquare / (xSquare + ySquare);
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}
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else
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{
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// Quadrant 3
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angle = 2 + ySquare / (xSquare + ySquare);
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}
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}
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}
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Angle GetOpposite();
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inline bool operator <(Angle& a) {
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if (angle < a.angle) return true;
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return false;
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}
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inline Angle operator -(Angle& a) {
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mpq_class diff = angle - a.angle;
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if (diff < 0) diff = diff + 4;
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return Angle(diff);
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}
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inline mpq_class GetAngle()
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{
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return angle;
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}
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inline bool IsZero()
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{
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return angle == 0;
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}
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inline bool IsInfinite()
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{
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return angle == Infinite;
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}
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private:
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const static int Maxvalue = 4;
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// is infinite
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const static int Infinite = Maxvalue + 1;
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void Normalize();
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mpq_class angle;
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};
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std::ostream& operator <<(std::ostream& o, Angle& a);
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}
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}
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#endif
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