georegression.struct.shapes

Class EllipseQuadratic_F32

java.lang.Object

georegression.struct.shapes.EllipseQuadratic_F32

All Implemented Interfaces:

java.io.Serializable

public class EllipseQuadratic_F32
extends java.lang.Object
implements java.io.Serializable

In general quadratic form, an ellipse is described by 6-coefficients:
F(x,y) = a*x^2 + 2*b*x*y + c*y^2 + 2*d*x + 2*e*y + f = 0
a*c - b*b > 0
where [a,b,c,d,e,f] are the coefficients and [x,y] is the coordinate of a point on the ellipse.

NOTE: these parameters are unique only up to a scale factor.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
float	a coefficients
float	b coefficients
float	c coefficients
float	d coefficients
float	e coefficients
float	f coefficients

Constructor Summary

Constructors

Constructor and Description
EllipseQuadratic_F32()
EllipseQuadratic_F32(float a, float b, float c, float d, float e, float f)

Method Summary

Modifier and Type	Method and Description
boolean	isEllipse() Checks to see if the parameters define an ellipse using the a*c - b*b > 0 constraint.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

a

public float a

coefficients

b

public float b

coefficients

c

public float c

coefficients

d

public float d

coefficients

e

public float e

coefficients

f

public float f

coefficients

Constructor Detail

EllipseQuadratic_F32

public EllipseQuadratic_F32(float a,
                            float b,
                            float c,
                            float d,
                            float e,
                            float f)

EllipseQuadratic_F32

public EllipseQuadratic_F32()

Method Detail

isEllipse

public boolean isEllipse()

Checks to see if the parameters define an ellipse using the a*c - b*b > 0 constraint.

Returns:

true if it's an ellipse or false if not