712 lines
20 KiB
C++
712 lines
20 KiB
C++
|
/*
|
||
|
|
This file is part of SECONDO.
|
||
|
|
|
||
|
|
Copyright (C) 2013, University in Hagen, Department of Computer Science,
|
||
|
|
Database Systems for New Applications.
|
||
|
|
|
||
|
|
SECONDO is free software; you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation; either version 2 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
SECONDO is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with SECONDO; if not, write to the Free Software
|
||
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
TileAlgebra includes
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "HalfSegment.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
declaration of namespace TileAlgebra
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
namespace TileAlgebra
|
||
|
|
{
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method CheckPoints checks the consistency of given left point and right point.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rLeftPoint - reference to left point
|
||
|
|
rRightPoint - reference to right point
|
||
|
|
return value: true, if left point and right point were exchanged,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool CheckPoints(Point& rLeftPoint,
|
||
|
|
Point& rRightPoint)
|
||
|
|
{
|
||
|
|
bool bPointsExchanged = false;
|
||
|
|
|
||
|
|
if(rLeftPoint.IsDefined() &&
|
||
|
|
rRightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
if((rLeftPoint.GetX() > rRightPoint.GetX()) ||
|
||
|
|
(rLeftPoint.GetX() == rRightPoint.GetX() &&
|
||
|
|
rLeftPoint.GetY() > rRightPoint.GetY()))
|
||
|
|
{
|
||
|
|
Point point = rLeftPoint;
|
||
|
|
rLeftPoint = rRightPoint;
|
||
|
|
rRightPoint = point;
|
||
|
|
bPointsExchanged = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bPointsExchanged;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method IsPointInRectangle checks if given Point is in given Rectangle<2>.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rPoint - reference to a point
|
||
|
|
rRectangle - reference to a rectangle
|
||
|
|
return value: true, if rPoint is in rRectangle,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool IsPointInRectangle(const Point& rPoint,
|
||
|
|
const Rectangle<2>& rRectangle)
|
||
|
|
{
|
||
|
|
bool bIsPointInRectangle = false;
|
||
|
|
|
||
|
|
if(rPoint.IsDefined() &&
|
||
|
|
rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
if(rPoint.GetX() >= rRectangle.MinD(0) &&
|
||
|
|
rPoint.GetX() < rRectangle.MaxD(0) &&
|
||
|
|
rPoint.GetY() >= rRectangle.MinD(1) &&
|
||
|
|
rPoint.GetY() < rRectangle.MaxD(1))
|
||
|
|
{
|
||
|
|
bIsPointInRectangle = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bIsPointInRectangle;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method CheckHalfSegment checks the consistency of the given HalfSegment.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
return value: -
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
void CheckHalfSegment(HalfSegment& rHalfSegment)
|
||
|
|
{
|
||
|
|
Point leftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point rightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(leftPoint.IsDefined() &&
|
||
|
|
rightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
bool bIsLeftDomPoint = rHalfSegment.IsLeftDomPoint();
|
||
|
|
|
||
|
|
if(CheckPoints(leftPoint, rightPoint) == true)
|
||
|
|
{
|
||
|
|
rHalfSegment.Set(!bIsLeftDomPoint, leftPoint, rightPoint);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method IsHorizontalHalfSegment checks if given HalfSegment is a horizontal line.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
return value: true, if rHalfSegment is a horizontal line, otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool IsHorizontalHalfSegment(const HalfSegment& rHalfSegment)
|
||
|
|
{
|
||
|
|
bool bIsHorizontalHalfSegment = false;
|
||
|
|
|
||
|
|
Point leftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point rightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(leftPoint.IsDefined() &&
|
||
|
|
rightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
if(AlmostEqual(leftPoint.GetY(), rightPoint.GetY()))
|
||
|
|
{
|
||
|
|
bIsHorizontalHalfSegment = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bIsHorizontalHalfSegment;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method IsVerticalHalfSegment checks if given HalfSegment is a vertical line.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
return value: true, if rHalfSegment is a vertical line, otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool IsVerticalHalfSegment(const HalfSegment& rHalfSegment)
|
||
|
|
{
|
||
|
|
bool bIsVerticalHalfSegment = false;
|
||
|
|
|
||
|
|
Point leftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point rightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(leftPoint.IsDefined() &&
|
||
|
|
rightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
if(AlmostEqual(leftPoint.GetX(), rightPoint.GetX()))
|
||
|
|
{
|
||
|
|
bIsVerticalHalfSegment = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bIsVerticalHalfSegment;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method HalfSegmentPointsInRectangle returns the number of HalfSegment points
|
||
|
|
inside the given Rectangle<2>.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
return value: number of HalfSegment points inside rRectangle
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
unsigned char HalfSegmentPointsInRectangle(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle)
|
||
|
|
{
|
||
|
|
unsigned char halfSegmentPointsInRectangle = 0;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
Point leftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point rightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(leftPoint.IsDefined() &&
|
||
|
|
rightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(leftPoint, rightPoint);
|
||
|
|
|
||
|
|
if(IsPointInRectangle(leftPoint, rRectangle))
|
||
|
|
{
|
||
|
|
halfSegmentPointsInRectangle++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(IsPointInRectangle(rightPoint, rRectangle))
|
||
|
|
{
|
||
|
|
halfSegmentPointsInRectangle++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return halfSegmentPointsInRectangle;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method HalfSegmentIntersectsLeftRectangleBorder checks if given HalfSegment
|
||
|
|
intersects the left border of given Rectangle<2> and returns
|
||
|
|
the intersection point between HalfSegment and left rectangle border.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
rPoint - reference to a Point containing intersection coordinates
|
||
|
|
return value: true, if rHalfSegment intersects left border of rRectangle,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool HalfSegmentIntersectsLeftRectangleBorder(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle,
|
||
|
|
Point& rPoint)
|
||
|
|
{
|
||
|
|
bool bHalfSegmentIntersectsLeftRectangleBorder = false;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
Point halfSegmentLeftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point halfSegmentRightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.IsDefined() &&
|
||
|
|
halfSegmentRightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(halfSegmentLeftPoint, halfSegmentRightPoint);
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.GetX() <= rRectangle.MinD(0) &&
|
||
|
|
rRectangle.MinD(0) <= halfSegmentRightPoint.GetX())
|
||
|
|
{
|
||
|
|
double deltaX = halfSegmentRightPoint.GetX() -
|
||
|
|
halfSegmentLeftPoint.GetX();
|
||
|
|
double deltaY = halfSegmentRightPoint.GetY() -
|
||
|
|
halfSegmentLeftPoint.GetY();
|
||
|
|
double m = deltaY / deltaX;
|
||
|
|
double n = halfSegmentLeftPoint.GetY() -
|
||
|
|
m * halfSegmentLeftPoint.GetX();
|
||
|
|
|
||
|
|
double y = m * rRectangle.MinD(0) + n;
|
||
|
|
|
||
|
|
if(y >= rRectangle.MinD(1) &&
|
||
|
|
y < rRectangle.MaxD(1))
|
||
|
|
{
|
||
|
|
bHalfSegmentIntersectsLeftRectangleBorder = true;
|
||
|
|
rPoint.Set(rRectangle.MinD(0), y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bHalfSegmentIntersectsLeftRectangleBorder;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method HalfSegmentIntersectsRightRectangleBorder checks if given HalfSegment
|
||
|
|
intersects the right border of given Rectangle<2> and returns
|
||
|
|
the intersection point between HalfSegment and right rectangle border.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
rPoint - reference to a Point containing intersection coordinates
|
||
|
|
return value: true, if rHalfSegment intersects right border of rRectangle,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool HalfSegmentIntersectsRightRectangleBorder(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle,
|
||
|
|
Point& rPoint)
|
||
|
|
{
|
||
|
|
bool bHalfSegmentIntersectsRightRectangleBorder = false;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
Point halfSegmentLeftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point halfSegmentRightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.IsDefined() &&
|
||
|
|
halfSegmentRightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(halfSegmentLeftPoint, halfSegmentRightPoint);
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.GetX() <= rRectangle.MaxD(0) &&
|
||
|
|
rRectangle.MaxD(0) <= halfSegmentRightPoint.GetX())
|
||
|
|
{
|
||
|
|
double deltaX = halfSegmentRightPoint.GetX() -
|
||
|
|
halfSegmentLeftPoint.GetX();
|
||
|
|
double deltaY = halfSegmentRightPoint.GetY() -
|
||
|
|
halfSegmentLeftPoint.GetY();
|
||
|
|
double m = deltaY / deltaX;
|
||
|
|
double n = halfSegmentLeftPoint.GetY() -
|
||
|
|
m * halfSegmentLeftPoint.GetX();
|
||
|
|
|
||
|
|
double y = m * rRectangle.MaxD(0) + n;
|
||
|
|
|
||
|
|
if(y >= rRectangle.MinD(1) &&
|
||
|
|
y < rRectangle.MaxD(1))
|
||
|
|
{
|
||
|
|
bHalfSegmentIntersectsRightRectangleBorder = true;
|
||
|
|
rPoint.Set(rRectangle.MaxD(0), y);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bHalfSegmentIntersectsRightRectangleBorder;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method HalfSegmentIntersectsLowerRectangleBorder checks if given HalfSegment
|
||
|
|
intersects the lower border of given Rectangle<2> and returns
|
||
|
|
the intersection point between HalfSegment and lower rectangle border.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
rPoint - reference to a Point containing intersection coordinates
|
||
|
|
return value: true, if rHalfSegment intersects lower border of rRectangle,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool HalfSegmentIntersectsLowerRectangleBorder(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle,
|
||
|
|
Point& rPoint)
|
||
|
|
{
|
||
|
|
bool bHalfSegmentIntersectsLowerRectangleBorder = false;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
Point halfSegmentLeftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point halfSegmentRightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.IsDefined() &&
|
||
|
|
halfSegmentRightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(halfSegmentLeftPoint, halfSegmentRightPoint);
|
||
|
|
|
||
|
|
double deltaX = halfSegmentRightPoint.GetX() -
|
||
|
|
halfSegmentLeftPoint.GetX();
|
||
|
|
double deltaY = halfSegmentRightPoint.GetY() -
|
||
|
|
halfSegmentLeftPoint.GetY();
|
||
|
|
double m = deltaY / deltaX;
|
||
|
|
double n = halfSegmentLeftPoint.GetY() -
|
||
|
|
m * halfSegmentLeftPoint.GetX();
|
||
|
|
|
||
|
|
double x = (rRectangle.MinD(1) - n) / m;
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.GetX() <= x &&
|
||
|
|
x <= halfSegmentRightPoint.GetX() &&
|
||
|
|
x >= rRectangle.MinD(0) &&
|
||
|
|
x < rRectangle.MaxD(0))
|
||
|
|
{
|
||
|
|
bHalfSegmentIntersectsLowerRectangleBorder = true;
|
||
|
|
rPoint.Set(x, rRectangle.MinD(1));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bHalfSegmentIntersectsLowerRectangleBorder;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method HalfSegmentIntersectsUpperRectangleBorder checks if given HalfSegment
|
||
|
|
intersects the upper border of given Rectangle<2> and returns
|
||
|
|
the intersection point between HalfSegment and upper rectangle border.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
rPoint - reference to a Point containing intersection coordinates
|
||
|
|
return value: true, if rHalfSegment intersects upper border of rRectangle,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool HalfSegmentIntersectsUpperRectangleBorder(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle,
|
||
|
|
Point& rPoint)
|
||
|
|
{
|
||
|
|
bool bHalfSegmentIntersectsUpperRectangleBorder = false;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
Point halfSegmentLeftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point halfSegmentRightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.IsDefined() &&
|
||
|
|
halfSegmentRightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(halfSegmentLeftPoint, halfSegmentRightPoint);
|
||
|
|
|
||
|
|
double deltaX = halfSegmentRightPoint.GetX() -
|
||
|
|
halfSegmentLeftPoint.GetX();
|
||
|
|
double deltaY = halfSegmentRightPoint.GetY() -
|
||
|
|
halfSegmentLeftPoint.GetY();
|
||
|
|
double m = deltaY / deltaX;
|
||
|
|
double n = halfSegmentLeftPoint.GetY() -
|
||
|
|
m * halfSegmentLeftPoint.GetX();
|
||
|
|
|
||
|
|
double x = (rRectangle.MaxD(1) - n) / m;
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.GetX() <= x &&
|
||
|
|
x <= halfSegmentRightPoint.GetX() &&
|
||
|
|
x >= rRectangle.MinD(0) &&
|
||
|
|
x < rRectangle.MaxD(0))
|
||
|
|
{
|
||
|
|
bHalfSegmentIntersectsUpperRectangleBorder = true;
|
||
|
|
rPoint.Set(x, rRectangle.MaxD(1));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bHalfSegmentIntersectsUpperRectangleBorder;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method HalfSegmentIntersectsRectangle checks if given HalfSegment
|
||
|
|
intersects given Rectangle<2>.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
return value: true, if rHalfSegment intersects rRectangle, otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool HalfSegmentIntersectsRectangle(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle)
|
||
|
|
{
|
||
|
|
bool bHalfSegmentIntersectsRectangle = false;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
Point leftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point rightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(leftPoint.IsDefined() &&
|
||
|
|
rightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(leftPoint, rightPoint);
|
||
|
|
|
||
|
|
unsigned char halfSegmentPointsInRectangle =
|
||
|
|
HalfSegmentPointsInRectangle(rHalfSegment, rRectangle);
|
||
|
|
|
||
|
|
if(halfSegmentPointsInRectangle > 0)
|
||
|
|
{
|
||
|
|
bHalfSegmentIntersectsRectangle = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if(IsHorizontalHalfSegment(rHalfSegment) &&
|
||
|
|
leftPoint.GetX() < rRectangle.MinD(0) &&
|
||
|
|
rightPoint.GetX() >= rRectangle.MaxD(0) &&
|
||
|
|
leftPoint.GetY() >= rRectangle.MinD(1) &&
|
||
|
|
leftPoint.GetY() < rRectangle.MaxD(1))
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
case: horizontal line
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bHalfSegmentIntersectsRectangle = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(IsVerticalHalfSegment(rHalfSegment) &&
|
||
|
|
leftPoint.GetX() >= rRectangle.MinD(0) &&
|
||
|
|
leftPoint.GetX() < rRectangle.MaxD(0) &&
|
||
|
|
leftPoint.GetY() < rRectangle.MinD(1) &&
|
||
|
|
rightPoint.GetY() >= rRectangle.MaxD(1))
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
case: vertical line
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bHalfSegmentIntersectsRectangle = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(bHalfSegmentIntersectsRectangle == false)
|
||
|
|
{
|
||
|
|
Point point(true, 0.0, 0.0);
|
||
|
|
|
||
|
|
if(HalfSegmentIntersectsLeftRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point) ||
|
||
|
|
HalfSegmentIntersectsRightRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point) ||
|
||
|
|
HalfSegmentIntersectsLowerRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point) ||
|
||
|
|
HalfSegmentIntersectsUpperRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point))
|
||
|
|
{
|
||
|
|
bHalfSegmentIntersectsRectangle = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bHalfSegmentIntersectsRectangle;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
Method GetPointsInRectangle returns a left point and a right point
|
||
|
|
of given HalfSegment inside the given Rectangle<2>.
|
||
|
|
|
||
|
|
author: Dirk Zacher
|
||
|
|
parameters: rHalfSegment - reference to a HalfSegment
|
||
|
|
rRectangle - reference to a Rectangle<2>
|
||
|
|
rLeftPoint - reference to the left point inside rRectangle
|
||
|
|
rRightPoint - reference to the right point inside rRectangle
|
||
|
|
return value: true, if left point and right point were successfully calculated,
|
||
|
|
otherwise false
|
||
|
|
exceptions: -
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
bool GetPointsInRectangle(const HalfSegment& rHalfSegment,
|
||
|
|
const Rectangle<2>& rRectangle,
|
||
|
|
Point& rLeftPoint,
|
||
|
|
Point& rRightPoint)
|
||
|
|
{
|
||
|
|
bool bRetVal = false;
|
||
|
|
|
||
|
|
if(rRectangle.IsDefined())
|
||
|
|
{
|
||
|
|
if(HalfSegmentIntersectsRectangle(rHalfSegment, rRectangle))
|
||
|
|
{
|
||
|
|
Point halfSegmentLeftPoint = rHalfSegment.GetLeftPoint();
|
||
|
|
Point halfSegmentRightPoint = rHalfSegment.GetRightPoint();
|
||
|
|
|
||
|
|
if(halfSegmentLeftPoint.IsDefined() &&
|
||
|
|
halfSegmentRightPoint.IsDefined())
|
||
|
|
{
|
||
|
|
CheckPoints(halfSegmentLeftPoint, halfSegmentRightPoint);
|
||
|
|
|
||
|
|
rLeftPoint.Set(halfSegmentLeftPoint);
|
||
|
|
rRightPoint.Set(halfSegmentRightPoint);
|
||
|
|
|
||
|
|
unsigned char halfSegmentPointsInRectangle =
|
||
|
|
HalfSegmentPointsInRectangle(rHalfSegment, rRectangle);
|
||
|
|
|
||
|
|
if(halfSegmentPointsInRectangle < 2)
|
||
|
|
{
|
||
|
|
if(IsHorizontalHalfSegment(rHalfSegment))
|
||
|
|
{
|
||
|
|
if(rLeftPoint.GetX() < rRectangle.MinD(0))
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(rRectangle.MinD(0), rLeftPoint.GetY());
|
||
|
|
}
|
||
|
|
|
||
|
|
if(rRightPoint.GetX() > rRectangle.MaxD(0))
|
||
|
|
{
|
||
|
|
rRightPoint.Set(rRectangle.MaxD(0), rRightPoint.GetY());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
else if(IsVerticalHalfSegment(rHalfSegment))
|
||
|
|
{
|
||
|
|
if(rLeftPoint.GetY() < rRectangle.MinD(1))
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(rLeftPoint.GetX(), rRectangle.MinD(1));
|
||
|
|
}
|
||
|
|
|
||
|
|
if(rRightPoint.GetY() > rRectangle.MaxD(1))
|
||
|
|
{
|
||
|
|
rRightPoint.Set(rRightPoint.GetX(), rRectangle.MaxD(1));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rLeftPoint.SetDefined(false);
|
||
|
|
rRightPoint.SetDefined(false);
|
||
|
|
|
||
|
|
if(halfSegmentPointsInRectangle == 1)
|
||
|
|
{
|
||
|
|
if(IsPointInRectangle(halfSegmentLeftPoint, rRectangle))
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(halfSegmentLeftPoint);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(IsPointInRectangle(halfSegmentRightPoint, rRectangle))
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(halfSegmentRightPoint);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Point point(true, 0.0, 0.0);
|
||
|
|
|
||
|
|
if(rRightPoint.IsDefined() == false &&
|
||
|
|
HalfSegmentIntersectsLeftRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point))
|
||
|
|
{
|
||
|
|
if(rLeftPoint.IsDefined() == false)
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(point);
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rRightPoint.Set(point);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(rRightPoint.IsDefined() == false &&
|
||
|
|
HalfSegmentIntersectsRightRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point))
|
||
|
|
{
|
||
|
|
if(rLeftPoint.IsDefined() == false)
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(point);
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rRightPoint.Set(point);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(rRightPoint.IsDefined() == false &&
|
||
|
|
HalfSegmentIntersectsLowerRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point))
|
||
|
|
{
|
||
|
|
if(rLeftPoint.IsDefined() == false)
|
||
|
|
{
|
||
|
|
rLeftPoint.Set(point);
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rRightPoint.Set(point);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(rRightPoint.IsDefined() == false &&
|
||
|
|
HalfSegmentIntersectsUpperRectangleBorder(rHalfSegment,
|
||
|
|
rRectangle,
|
||
|
|
point))
|
||
|
|
{
|
||
|
|
if(rLeftPoint.IsDefined() == false)
|
||
|
|
{
|
||
|
|
assert(false);
|
||
|
|
}
|
||
|
|
|
||
|
|
else
|
||
|
|
{
|
||
|
|
rRightPoint.Set(point);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
CheckPoints(rLeftPoint, rRightPoint);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bRetVal = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return bRetVal;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|