georegression.struct.line

Class LineGeneral2D_F32

java.lang.Object

georegression.struct.line.LineGeneral2D_F32

All Implemented Interfaces:

java.io.Serializable

public class LineGeneral2D_F32
extends java.lang.Object
implements java.io.Serializable

Represents the line using three parameters such that any point on the line obeys the following formula, A*x + B*y + C = 0. Any 2D line can be represented using this notation. This formulation is also known as standard and implicit. The slope is -A/B.

If it is said the line is normalized that refers to it being scaled such that A*A + B*B = 1. To normalize a line call normalize(). After normalization several operations become less expensive.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
float	A Coefficients which define the line.
float	B Coefficients which define the line.
float	C Coefficients which define the line.

Constructor Summary

Constructors

Constructor and Description
LineGeneral2D_F32()
LineGeneral2D_F32(float a, float b, float c)
LineGeneral2D_F32(LineGeneral2D_F32 line)

Method Summary

Modifier and Type	Method and Description
LineGeneral2D_F32	copy()
float	evaluate(float x, float y) Returns the result of A*x + B*y + C.
float	getA()
float	getB()
float	getC()
void	normalize() Ensures that A*A + B*B == 1
void	set(float a, float b, float c)
void	set(LineGeneral2D_F32 original)
void	setA(float a)
void	setB(float b)
void	setC(float c)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

A

public float A

Coefficients which define the line.

B

public float B

Coefficients which define the line.

C

public float C

Coefficients which define the line.

Constructor Detail

LineGeneral2D_F32

public LineGeneral2D_F32(float a,
                         float b,
                         float c)

LineGeneral2D_F32

public LineGeneral2D_F32(LineGeneral2D_F32 line)

LineGeneral2D_F32

public LineGeneral2D_F32()

Method Detail

getA

public float getA()

getB

public float getB()

getC

public float getC()

set

public void set(LineGeneral2D_F32 original)

set

public void set(float a,
                float b,
                float c)

setA

public void setA(float a)

setB

public void setB(float b)

setC

public void setC(float c)

normalize

public void normalize()

Ensures that A*A + B*B == 1

evaluate

public float evaluate(float x,
                      float y)

Returns the result of A*x + B*y + C. If the line is normalized then this is also the signed distance away from the line.

Parameters:

x - x-coordinate of a point

y - y-coordinate of a point

Returns:

result of line equation

copy

public LineGeneral2D_F32 copy()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object