/**
* Rotates this camera by a given amount. If <code>relative</code> is set to <code>true</code>
* then the rotation will be performed relative to this camera's current orientation. Otherwise,
* the rotation will be performed relative to the world coordinate system.
*
* <p>If this camera's focus is locked, then only rotation about the z axis (roll) will be
* performed.
*
* @param rotation The amount of rotation to be applied to this camera.
* @param relative A boolean flag stating whether the rotation performed should be relative to
* this camera's current orientation.
*/
public void rotate(Rotation rotation, boolean relative) {
// store current focus point
Vector3D focusPoint = getFocusPoint();
// perform rotation
if (relative) super.setOrientation(getOrientation().append(rotation));
else super.setOrientation(rotation.append(getOrientation()));
// if focus is locked, look at the point of focus
if (focusLocked) lookAt(focusPoint);
}
/**
* Rotates this camera by a given amount around a given point. The rotation will be performed
* relative to the world coordinate system. If the <cod>reorient</code> flag is set to <code>true
* </code>, then the rotation will be applied as a standard rotational transformation would;
* altering this camera's orientation. If set to <code>false</code>, this camera's orientation
* will remain unchanged as the rotation is performed.
*
* <p>Note that the camera will maintain focus if the camera's focus is locked.
*
* @param rotation The amount of rotation to be applied to this camera.
* @param point The point, in the world coordinate system, about which the rotation will occur.
* @param reorient A flag stating whether or not to alter this camera's orientation as with the
* applied rotation.
*/
public void rotate(Rotation rotation, Vector3D point, boolean reorient) {
// store current focus point
Vector3D focusPoint = getFocusPoint();
// find vector between given point and camera, in local coordinates
Vector3D vect = getPosition().subtract(point);
// move camera to given point
super.setPosition(point);
// rotate camera for standard rotation
if (reorient) super.setOrientation(rotation.append(getOrientation()));
// rotate vector
vect = vect.rotate(rotation);
// move back to proper position
super.setPosition(getPosition().add(vect));
// if focus is locked, look at original focus point
if (focusLocked) lookAt(focusPoint);
}
