frink.graphics

Class Point2DFloat

java.lang.Object

frink.graphics.Point2DFloat

public class Point2DFloat
extends java.lang.Object

This represents a point in 2 dimensions with each coordinate represented as a float. THINK ABOUT: Do we want to change this to be immutable after creation? THINK ABOUT: Do we want to make this implement ListExpression?

Author:

Alan Eliasen, eliasen@mindspring.com

Field Summary

Fields

Modifier and Type	Field and Description
float	x The x coordinate of the point.
float	y The y coordinate of the point.

Constructor Summary

Constructors

Constructor and Description
Point2DFloat(float x, float y) Constructor.

Method Summary

Modifier and Type	Method and Description
static float	distance(float x1, float y1, float x2, float y2) Returns the distance between two points, (x1, y1) and (x2, y2).
Point2DFloat	rotateAround(float cx, float cy, double theta) Rotates this point around another point (cx, cy) with angle theta.
static Point2DFloat	rotateAround(float x, float y, float cx, float cy, double theta) Rotates a point (x,y) around another point (cx, cy) with angle theta (specified in radians).
Point2DFloat	rotateAround(Point2DFloat center, double theta) Rotates this point around another point (cx, cy) with angle theta.
Point2DFloat	scaleAround(float cx, float cy, float scale) Scales this point around another point (cx, cy) with scale factor scale.
static Point2DFloat	scaleAround(float x, float y, float cx, float cy, float scale) Scales a point (x,y) around another point (cx, cy) with scale factor scale.
Point2DFloat	scaleAround(Point2DFloat center, float scale) Scales this point around another point (cx, cy) with scale factor scale.
frink.expr.BasicListExpression	toExpression() Converts to a Frink expression as a ListExpression with [x,y] values.

Methods inherited from class java.lang.Object

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

Field Detail

x

public float x

The x coordinate of the point.

y

public float y

The y coordinate of the point.

Constructor Detail

Point2DFloat

public Point2DFloat(float x,
                    float y)

Constructor.

Method Detail

distance

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

Returns the distance between two points, (x1, y1) and (x2, y2).

scaleAround

public static Point2DFloat scaleAround(float x,
                                       float y,
                                       float cx,
                                       float cy,
                                       float scale)

Scales a point (x,y) around another point (cx, cy) with scale factor scale.

scaleAround

public Point2DFloat scaleAround(float cx,
                                float cy,
                                float scale)

Scales this point around another point (cx, cy) with scale factor scale.

scaleAround

public Point2DFloat scaleAround(Point2DFloat center,
                                float scale)

Scales this point around another point (cx, cy) with scale factor scale.

rotateAround

public static Point2DFloat rotateAround(float x,
                                        float y,
                                        float cx,
                                        float cy,
                                        double theta)

Rotates a point (x,y) around another point (cx, cy) with angle theta (specified in radians). Looking from a positive Z axis toward the origin, a positive angle gives a counterclockwise rotation.

rotateAround

public Point2DFloat rotateAround(float cx,
                                 float cy,
                                 double theta)

Rotates this point around another point (cx, cy) with angle theta. Looking from a positive Z axis toward the origin, a positive angle gives a counterclockwise rotation.

rotateAround

public Point2DFloat rotateAround(Point2DFloat center,
                                 double theta)

Rotates this point around another point (cx, cy) with angle theta. Looking from a positive Z axis toward the origin, a positive angle gives a counterclockwise rotation.

toExpression

public frink.expr.BasicListExpression toExpression()

Converts to a Frink expression as a ListExpression with [x,y] values.