GLViewer_Poly Class Reference

#include <GLViewer_Geom.h>

Public Member Functions
	GLViewer_Poly (const GLViewer_PntList *thePoints)
virtual	~GLViewer_Poly ()
void	AddPoint (GLViewer_Pnt &pnt)
	Adds point to polygon. More...
int	Count () const
	Returns number of point. More...
virtual bool	IsIn (const GLViewer_Pnt &thePnt) const
	Returns true if a point lies inside this polygon. More...
virtual bool	IsCovers (const GLViewer_Poly &thePoly) const
	Returns true if a other polygon covers this polygon More...
virtual bool	IsCovers (const GLViewer_Rect &theRect) const
	Likes the above function. More...
virtual bool	HasIntersection (const GLViewer_Segment &theSegment) const

Private Attributes
GLViewer_PntList *	myPoints

Detailed Description

Class GLViewer_Poly Polygon for 2d detection

Constructor & Destructor Documentation

GLViewer_Poly()

GLViewer_Poly::GLViewer_Poly

(

const GLViewer_PntList *

thePoints

)

constructs a closed polygon from the given ordered list of points

~GLViewer_Poly()

GLViewer_Poly::~GLViewer_Poly ( )

virtual

destructor, <myPoints> mustn't be deleted here!

Member Function Documentation

AddPoint()

void GLViewer_Poly::AddPoint ( GLViewer_Pnt &  pnt )

inline

Adds point to polygon.

Count()

int GLViewer_Poly::Count ( ) const

inline

Returns number of point.

HasIntersection()

bool GLViewer_Poly::HasIntersection ( const GLViewer_Segment &  theSegment ) const

virtual

Returns

true if polygon has intersection with segment or ray

Parameters

theSegment

- segment to check intersection

References GLViewer_Segment::HasIntersection(), and myPoints.

IsCovers() [1/2]

bool GLViewer_Poly::IsCovers ( const GLViewer_Poly &  thePoly ) const

virtual

Returns true if a other polygon covers this polygon

Returns

true if <thePnt> lies within this polygon

true if <thePoly> covers this polygon

References Count(), IsIn(), and myPoints.

IsCovers() [2/2]

bool GLViewer_Poly::IsCovers ( const GLViewer_Rect &  theRect ) const

virtual

Likes the above function.

Returns

true if <theRect> covers this polygon

References GLViewer_Rect::bottom(), GLViewer_Poly(), IsCovers(), GLViewer_Rect::left(), myPoints, GLViewer_Rect::right(), and GLViewer_Rect::top().

IsIn()

bool GLViewer_Poly::IsIn ( const GLViewer_Pnt &  thePnt ) const

virtual

Returns true if a point lies inside this polygon.

Returns

true if <thePnt> lies within this polygon

References GLViewer_Segment::HasIntersection(), myPoints, and GLViewer_Pnt::y().

Member Data Documentation

myPoints

GLViewer_PntList* GLViewer_Poly::myPoints

private

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The documentation for this class was generated from the following files:

• src/GLViewer/GLViewer_Geom.h
• src/GLViewer/GLViewer_Geom.cxx