273 lines
5.0 KiB
C++
273 lines
5.0 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2013, University in Hagen,
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Faculty of Mathematics and 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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[1] Implementation
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Oktober 2014 - Maerz 2015, S. Schroeer for master thesis.
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[TOC]
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1 Helper classes and methods
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1.1 Some forward declaration of helper methods
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*/
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#ifndef INTERSECTIONSEGMENT_H_
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#define INTERSECTIONSEGMENT_H_
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#include <gmp.h>
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#include <gmpxx.h>
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#include <assert.h>
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#include "SetOps2.h"
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#include "Segment3D.h"
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#include "Angle.h"
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namespace temporalalgebra{
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namespace mregionops2 {
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class PFace;
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/*
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1 Class IntersectionSegment
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This class represents essentially an oriented segment in the xyt-space.
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Each intersection of two non-disjunct ~PFaces~ create a pair of two
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~IntersectionSegment~ instances.
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Each instance keeps a pointer to the ~PFace~, it belongs to.
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*/
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class IntersectionSegment {
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public:
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/*
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1.1 Constructor
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The constructor assures the condition: $startpoint.t <= endpoint.t$
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*/
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IntersectionSegment(const Segment3D& s, PFace* pFace, Angle leftAng,
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Angle rightAng, Direction dir);
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/*
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1.1 Getter and setter methods
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1.1.1 GetPFace
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Returns a pointer to the ~PFace~, this instance belongs to.
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*/
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inline PFace* GetPFace() const {
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assert(pFace != 0);
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return pFace;
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}
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/*
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1.1.1 SetWCoords
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Intitialise the fields ~startWT~ and ~endWT~ by the transformations:
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* startXYT [->] startWT
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* endXYT [->] endWT
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*/
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void SetWCoords();
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/*
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1.1.1 Get$<$Coordinate$>$ methods
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This methods returns points of this ~IntersectionSegment~
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either in xyt-coords or in wt-coords.
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*/
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inline const Point3D* GetStartXYT() const {
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return &startXYT;
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}
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inline const Point3D* GetEndXYT() const {
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return &endXYT;
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}
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inline const Point2D GetStartXY() const {
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return Point2D(startXYT);
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}
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inline const Point2D GetEndXY() const {
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return Point2D(endXYT);
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}
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inline mpq_class GetStartT() const {
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return startXYT.GetT();
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}
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inline mpq_class GetEndT() const {
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return endXYT.GetT();
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}
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inline const Point2D* GetStartWT() const {
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return &startWT;
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}
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inline const Point2D* GetEndWT() const {
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return &endWT;
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}
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inline mpq_class GetStartW() const {
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return startWT.GetW();
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}
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inline mpq_class GetEndW() const {
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return endWT.GetW();
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}
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inline mpq_class GetIntervalStartW() const {
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return intervalStartW;
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}
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inline mpq_class GetIntervalEndW() const {
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return intervalStartW;
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}
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AreaDirection GetAreaDirection();
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/*
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1.1 Operators and Predicates
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1.1.1 IsOrthogonalToTAxis
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Returns ~true~, if this is parallel to the xy-plane.
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*/
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inline bool IsOrthogonalToTAxis() const {
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return (GetStartT() == GetEndT());
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}
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void Finalize();
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void UpdateWith(IntersectionSegment* seg);
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void InvertAreaDirection();
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bool IsLeftOf(const IntersectionSegment* intSeg) const;
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void ComputeIntervalW(const mpq_class s, const mpq_class e);
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/*
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1.1.1 Evaluate
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Returns the point (in xyt-coords) on this segment with t-coord t.
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Precondition: $startpoint.t <= t <= endpoint.t$
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*/
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Point3D Evaluate(const mpq_class t) const;
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void Print();
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private:
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/*
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1.1 Private methods
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*/
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inline void SetStartWT(const Point2D& _startWT) {
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startWT = _startWT;
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}
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inline void SetEndWT(const Point2D& _endWT) {
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endWT = _endWT;
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}
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/*
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1.1 Attributes
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1.1.1 startXYT and endXYT
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Start- and endpoint of this segment in xyt-coordinates.
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Note that they are independed of the ~PFace~.
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*/
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Point3D startXYT;
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Point3D endXYT;
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/*
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1.1.1 startWT and endWT
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Start- and endpoint of this segment in wt-coordinates.
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Note that the w-coord depends on the ~PFace~.
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We store them here for the sake of efficency.
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*/
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Point2D startWT;
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Point2D endWT;
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Angle rightNeighbour;
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Direction rightNeighbourDir;
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Angle leftNeighbour;
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Direction leftNeighbourDir;
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mpq_class intervalStartW;
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mpq_class intervalEndW;
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AreaDirection areaDirection;
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/*
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1.1.1 pFace
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A pointer to the ~PFace~, this instance belongs to.
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*/
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PFace* pFace;
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};
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} // namespace end
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} // namespace end
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#endif /*INTERSECTIONSEGMENT_H_*/
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