inet::Sphere Class Reference

This class represents a 3 dimensional sphere shape. More...

#include <Sphere.h>

Inheritance diagram for inet::Sphere:

Public Member Functions
	Sphere (double radius)
double	getRadius () const
void	setRadius (double radius)
virtual Coord	computeBoundingBoxSize () const override
	Computes the 3 dimensional size of the shapes's bounding box. More...
virtual bool	computeIntersection (const LineSegment &lineSegment, Coord &intersection1, Coord &intersection2, Coord &normal1, Coord &normal2) const override
	Computes the intersection with the given line segment in the shape's coordinate system. More...
Public Member Functions inherited from inet::ShapeBase
	ShapeBase ()
virtual	~ShapeBase ()

Protected Attributes
double	radius

Detailed Description

This class represents a 3 dimensional sphere shape.

Constructor & Destructor Documentation

Sphere()

inet::Sphere::Sphere

(

double

radius

)

                            :
    radius(radius)
{
}

Member Function Documentation

computeBoundingBoxSize()

virtual Coord inet::Sphere::computeBoundingBoxSize ( ) const

inlineoverridevirtual

Computes the 3 dimensional size of the shapes's bounding box.

Implements inet::ShapeBase.

{ return Coord(radius * 2, radius * 2, radius * 2); }

computeIntersection()

bool inet::Sphere::computeIntersection ( const LineSegment &  lineSegment, Coord &  intersection1, Coord &  intersection2, Coord &  normal1, Coord &  normal2  ) const

overridevirtual

Computes the intersection with the given line segment in the shape's coordinate system.

Implements inet::ShapeBase.

{
    // NOTE: based on http://paulbourke.net/geometry/circlesphere/
    Coord point1 = lineSegment.getPoint1();
    Coord point2 = lineSegment.getPoint2();
    double a, b, c;
    double bb4ac;
    Coord dp = point2 - point1;
    a = dp * dp;
    b = 2 * (dp.x * point1.x + dp.y * point1.y + dp.z * point1.z);
    c = point1 * point1 - radius * radius;
    bb4ac = b * b - 4 * a * c;
    if (bb4ac >= 0) {
        double alpha1 = (-b + sqrt(bb4ac)) / (2 * a);
        double alpha2 = (-b - sqrt(bb4ac)) / (2 * a);
        bool inside1 = false;
        if (alpha1 < 0)
            alpha1 = 0;
        else if (alpha1 > 1)
            alpha1 = 1;
        else
            inside1 = true;
        bool inside2 = false;
        if (alpha2 < 0)
            alpha2 = 0;
        else if (alpha2 > 1)
            alpha2 = 1;
        else
            inside2 = true;
        if (alpha1 == alpha2)
            return false;
        else {
            intersection1 = point1 * (1 - alpha1) + point2 * alpha1;
            intersection2 = point1 * (1 - alpha2) + point2 * alpha2;
            if (inside1)
                normal1 = intersection1 / intersection1.length();
            if (inside2)
                normal2 = intersection2 / intersection2.length();
            return true;
        }
    }
    else
        return false;
}

getRadius()

double inet::Sphere::getRadius ( ) const

inline

{ return radius; }

Referenced by inet::visualizer::PhysicalEnvironmentOsgVisualizer::refreshDisplay(), and inet::visualizer::PhysicalEnvironmentCanvasVisualizer::refreshDisplay().

setRadius()

void inet::Sphere::setRadius ( double  radius )

inline

{ this->radius = radius; }

Member Data Documentation

radius

double inet::Sphere::radius

protected

Referenced by computeIntersection().

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

• Sphere.h
• Sphere.cc