This class represents a 2 dimensional plane in the 3 dimensional space. More...

#include <Plane.h>

Inheritance diagram for inet::Plane:

Public Member Functions
	Plane ()

	Plane (const Coord &basePoint, const Coord &normalVector)

const Coord &	getBasePoint ()

void	setBasePoint (const Coord &basePoint)

const Coord &	getNormalVector ()

void	setNormalVector (const Coord &normalVector)

virtual bool	isNil () const override
	Returns true if this geometric object is the same as the unspecified singleton instance of this type. More...

virtual bool	isUnspecified () const override
	Returns true if this geometric object is not completely specified. More...

Coord	computeIntersection (const LineSegment &lineSegment)

Public Member Functions inherited from inet::GeometricObjectBase
	GeometricObjectBase ()

virtual	~GeometricObjectBase ()

Static Public Attributes
static const Plane	NIL

Protected Attributes
Coord	basePoint

Coord	normalVector

Detailed Description

This class represents a 2 dimensional plane in the 3 dimensional space.

Constructor & Destructor Documentation

inet::Plane::Plane ( )

              :
     basePoint(Coord::NIL),
     normalVector(Coord::NIL)
 {
 }

inet::Plane::Plane	(	const Coord &	basePoint,
		const Coord &	normalVector
	)

                                                               :
     basePoint(basePoint),
     normalVector(normalVector)
 {
 }

Member Function Documentation

Coord inet::Plane::computeIntersection ( const LineSegment & lineSegment )

Referenced by inet::Cuboid::computeIntersection().

 {
     // NOTE: based on http://paulbourke.net/geometry/pointlineplane/
     const Coord& point1 = lineSegment.getPoint1();
     const Coord& point2 = lineSegment.getPoint2();
     double denominator = normalVector * (point2 - point1);
     if (denominator == 0)
         return Coord::NIL;
     else {
         double numerator = normalVector * (basePoint - point1);
         double q = numerator / denominator;
         if (q < 0 || q > 1)
             return Coord::NIL;
         else
             return point1 * (1 - q) + point2 * q;
     }
 }