pythagoras.f

Class Points

java.lang.Object

pythagoras.f.Points

public class Points
extends Object

Point-related utility methods.

Field Summary

Fields

Modifier and Type	Field and Description
static IPoint	ZERO The point at the origin.

Constructor Summary

Constructors

Constructor and Description
Points()

Method Summary

Modifier and Type	Method and Description
static float	distance(float x1, float y1, float x2, float y2) Returns the Euclidean distance between the specified two points.
static float	distanceSq(float x1, float y1, float x2, float y2) Returns the squared Euclidean distance between the specified two points.
static boolean	epsilonEquals(IPoint p1, IPoint p2) Returns true if the supplied points' x and y components are equal to one another within MathUtil.EPSILON.
static boolean	epsilonEquals(IPoint p1, IPoint p2, float epsilon) Returns true if the supplied points' x and y components are equal to one another within epsilon.
static Point	inverseTransform(float x, float y, float sx, float sy, float rotation, float tx, float ty, Point result) Inverse transforms a point as specified, storing the result in the point provided.
static String	pointToString(float x, float y) Returns a string describing the supplied point, of the form +x+y, +x-y, -x-y, etc.
static Point	transform(float x, float y, float sx, float sy, float sina, float cosa, float tx, float ty, Point result) Transforms a point as specified, storing the result in the point provided.
static Point	transform(float x, float y, float sx, float sy, float rotation, float tx, float ty, Point result) Transforms a point as specified, storing the result in the point provided.

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

public static final IPoint ZERO

The point at the origin.

Constructor Detail

Points

public Points()

Method Detail

distanceSq

public static float distanceSq(float x1,
                               float y1,
                               float x2,
                               float y2)

Returns the squared Euclidean distance between the specified two points.

distance

public static float distance(float x1,
                             float y1,
                             float x2,
                             float y2)

Returns the Euclidean distance between the specified two points.

epsilonEquals

public static boolean epsilonEquals(IPoint p1,
                                    IPoint p2)

Returns true if the supplied points' x and y components are equal to one another within MathUtil.EPSILON.

epsilonEquals

public static boolean epsilonEquals(IPoint p1,
                                    IPoint p2,
                                    float epsilon)

Returns true if the supplied points' x and y components are equal to one another within epsilon.

transform

public static Point transform(float x,
                              float y,
                              float sx,
                              float sy,
                              float rotation,
                              float tx,
                              float ty,
                              Point result)

Transforms a point as specified, storing the result in the point provided.

Returns:

a reference to the result point, for chaining.

transform

public static Point transform(float x,
                              float y,
                              float sx,
                              float sy,
                              float sina,
                              float cosa,
                              float tx,
                              float ty,
                              Point result)

Transforms a point as specified, storing the result in the point provided.

Returns:

a reference to the result point, for chaining.

inverseTransform

public static Point inverseTransform(float x,
                                     float y,
                                     float sx,
                                     float sy,
                                     float rotation,
                                     float tx,
                                     float ty,
                                     Point result)

Inverse transforms a point as specified, storing the result in the point provided.

Returns:

a reference to the result point, for chaining.

pointToString

public static String pointToString(float x,
                                   float y)

Returns a string describing the supplied point, of the form +x+y, +x-y, -x-y, etc.