156 lines
3.6 KiB
C++
156 lines
3.6 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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*/
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#ifndef DISC_H
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#define DISC_H
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#include "Attribute.h"
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#include "Algebras/Rectangle/RectangleAlgebra.h"
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#include "NestedList.h"
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#include "ListUtils.h"
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#include "Point.h"
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/*
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1 Implementation of a disc
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*/
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class Disc : public Attribute{
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public:
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Disc() {}
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explicit Disc(bool def): Attribute(def), x(0),y(0),radius(0) {}
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Disc(const double _x, const double _y, const double _radius):
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Attribute(true), x(_x),y(_y),radius(_radius){
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SetDefined(radius>=0);
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}
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Disc(const Disc& src):
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Attribute(src), x(src.x),y(src.y),radius(src.radius){}
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Disc(const Point& p): Attribute(false),x(0),y(0),radius(0){
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if(!p.IsDefined()){
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return;
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}
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set(p.GetX(),p.GetY(),0);
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}
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Disc(const Point& p1, const Point& p2):
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Attribute(false),x(0),y(0),radius(0){
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if(!p1.IsDefined() || !p2.IsDefined()){
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return;
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}
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double x = (p1.GetX() + p2.GetX())/2.0;
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double y = (p1.GetY()+p2.GetY())/2.0;
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double r = p1.Distance(p2) / 2.0;
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set(x,y,r);
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}
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Disc(const Point& p1, const Point& p2, const Point& p3);
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~Disc() {}
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Disc& operator=(const Disc& src){
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SetDefined(src.IsDefined());
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this->x = src.x;
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this->y = src.y;
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this->radius = src.radius;
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return *this;
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}
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bool set(const double x, const double y, const double r){
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if(r<0){
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return false;
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}
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this->x = x;
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this->y = y;
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this->radius = r;
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SetDefined(true);
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return true;
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}
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bool contains(const Point& p) const{
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if(!IsDefined() || !p.IsDefined()){
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return false;
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}
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Point center(true,x,y);
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double d = center.Distance(p);
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return (AlmostEqual(d,radius) || d<radius);
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}
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ListExpr ToListExpr(ListExpr typeInfo);
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bool ReadFrom(ListExpr value, ListExpr typeInfo);
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int Compare(const Attribute* rhs) const;
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bool Adjacent(const Attribute*) const {return false;}
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size_t HashValue() const;
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void CopyFrom(const Attribute* rhs);
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Disc* Clone() const{ return new Disc(*this); }
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size_t Sizeof() const { return sizeof(*this); }
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virtual std::ostream& Print( std::ostream& os ) const;
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static std::string BasicType(){ return "disc"; }
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static const bool checkType(const ListExpr type){
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return listutils::isSymbol(type, BasicType());
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}
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static ListExpr Property(){
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return gentc::GenProperty("-> DATA",
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BasicType(),
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"(x y radius)",
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"(8.4 16.7 27");
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}
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static bool CheckKind(ListExpr type, ListExpr& errorInfo){
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return nl->IsEqual(type,BasicType());
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}
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private:
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double x;
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double y;
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double radius;
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};
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#endif
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