com.bbn.openmap.geo
Class Rotation

java.lang.Object
  com.bbn.openmap.geo.Rotation

public class Rotation
extends java.lang.Object

Defines a 3-D rotation, M, such that the matrix multiplication, Mv, rotates vector v an angle ,angle, counter clockwise about the Geo, g. See Newman and Sproull, 1973, Principles of Interactive Computer Garaphics, McGraw-Hill, New York, 463-465.

Field Summary

protected Geo

g

Constructor Summary

Rotation(Geo g, double angle)

Method Summary

Geo	rotate(Geo v)
static Geo	rotate(Geo v1, double angle, Geo v2, Geo ret) Static method that does what creating a Rotation object can calling rotate() on it does.

Methods inherited from class java.lang.Object

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

Field Detail

g

protected Geo g

Constructor Detail

Rotation

public Rotation(Geo g,
                double angle)

Method Detail

rotate

public Geo rotate(Geo v)

rotate

public static final Geo rotate(Geo v1,
                               double angle,
                               Geo v2,
                               Geo ret)

Static method that does what creating a Rotation object can calling rotate() on it does. Rotates vector v2 an angle counter clockwise about the Geo, v1.

Parameters:

v1 -

angle -

v2 -

ret - The Geo to load the results in, may be null which will cause the method to allocate a new Geo object.

Returns:

the ret Geo passed in, or a new one if ret was null.