Ellipse Class Reference

To store and treat an ellipsoidal figure. More...

Inheritance diagram for Ellipse:

List of all members.

Public Member Functions
	Ellipse ()
	Default constructor.
	Ellipse (Point< double > c, double a, double b, int code=1)
	Constructor with given data.
double	getSignedDistance (const Point< double > &p) const
	Return signed distance of a given point from the current ellipse.
Ellipse &	operator+= (Point< double > a)
	Operator +=.
Ellipse &	operator+= (double a)
	Operator *=.
void	setCode (int code)
	Choose a code for the domain defined by the figure.
void	getSignedDistance (const Grid &g, Vect< double > &d) const
	Calculate signed distance to current figure with respect to grid points.
double	dLine (const Point< double > &p, const Point< double > &a, const Point< double > &b) const

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Detailed Description

To store and treat an ellipsoidal figure.

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Constructor & Destructor Documentation

Ellipse

(

)

Default constructor.

Constructs an ellipse with semimajor axis = 1, and semiminor axis = 1

Ellipse	(	Point< double >	c,
		double	a,
		double	b,
		int	code = 1
	)

Constructor with given data.

Parameters:

[in]	c	Coordinates of center
[in]	a	Semimajor axis
[in]	b	Semiminor axis
[in]	code	Code to assign to the generated figure [Default: 1]

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Member Function Documentation

double getSignedDistance

(

const Point< double > &

p

)

const [virtual]

Return signed distance of a given point from the current ellipse.

The computed distance is negative if p lies in the ellipse, positive if it is outside, and 0 on its boundary

Parameters:

[in]

p

Point<double> instance

Reimplemented from Figure.

Ellipse& operator+=

(

Point< double >

a

)

Operator +=.

Translate ellipse by a vector a

Ellipse& operator+=

(

double

a

)

Operator *=.

Scale ellipse by a factor a

void getSignedDistance	(	const Grid &	g,
		Vect< double > &	d
	)		const [inherited]

Calculate signed distance to current figure with respect to grid points.

Parameters:

[in]	g	Grid instance
[in]	d	Vect instance containing calculated distance from each grid index to Figure

Remarks:

Vector d doesn't need to be sized before invoking this function

double dLine	(	const Point< double > &	p,
		const Point< double > &	a,
		const Point< double > &	b
	)		const [inherited]

Compute distance from a line

Parameters:

[in]	p	Point for which distance is computed
[in]	a	First vertex of line
[in]	b	Second vertex of line

Returns:

Signed distance