Class Point

java.lang.Object
  Point

public class Point
extends java.lang.Object

Represents a point in three dimensions, with the additional value for homogeneous coordinates.

Field Summary

static Point

ORIGIN

Method Summary

Point	add(Vector v) Returns the point reached by starting at this point and adding a vector scaled by the given scalar.
Point	addScaled(double scalar, Vector v) Returns the point reached by starting at this point and adding a vector scaled by the given scalar.
static Point	create(double x, double y, double z) Creates a point with the given coordinates, where the homogeneous value is 1.
static Point	create(double x, double y, double z, double h) Creates a point with the given coordinates.
double	getDistanceTo(Point other) Returns the distance from this point to the other point, both being scaled by their homogeneous coordinates.
double	getHomogeneous() Returns the value added to this point for homogeneous coordinates.
double	getX() Returns the x-coordinate of this point.
double	getY() Returns the y-coordinate of this point.
double	getZ() Returns the z-coordinate of this point.
Vector	subtract(Point other) Returns the vector starting at the other point and going to this point.
java.lang.String	toString() Returns a conventional string representation of this point.

Methods inherited from class java.lang.Object

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

Field Detail

ORIGIN

public static Point ORIGIN

Method Detail

getX

public double getX()

Returns the x-coordinate of this point.

getY

public double getY()

Returns the y-coordinate of this point.

getZ

public double getZ()

Returns the z-coordinate of this point.

getHomogeneous

public double getHomogeneous()

Returns the value added to this point for homogeneous coordinates.

toString

public java.lang.String toString()

Returns a conventional string representation of this point.

Overrides:

toString in class java.lang.Object

getDistanceTo

public double getDistanceTo(Point other)

Returns the distance from this point to the other point, both being scaled by their homogeneous coordinates.

subtract

public Vector subtract(Point other)

Returns the vector starting at the other point and going to this point. Computing this involves scaling both points by their homogeneous values.

addScaled

public Point addScaled(double scalar,
                       Vector v)

Returns the point reached by starting at this point and adding a vector scaled by the given scalar.

add

public Point add(Vector v)

Returns the point reached by starting at this point and adding a vector scaled by the given scalar.

create

public static Point create(double x,
                           double y,
                           double z)

Creates a point with the given coordinates, where the homogeneous value is 1.

create

public static Point create(double x,
                           double y,
                           double z,
                           double h)

Creates a point with the given coordinates.