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/*
* Copyright 1999-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package javax.media.j3d;
import javax.vecmath.Point3d;
import javax.vecmath.Point4d;
import javax.vecmath.Vector3d;
import javax.vecmath.Vector4d;
/**
* PickCylinder is the abstract base class of all cylindrical pick shapes.
*
* @since Java 3D 1.2
*/
public abstract class PickCylinder extends PickShape {
Point3d origin;
Vector3d direction;
double radius;
/**
* Constructs an empty PickCylinder.
* The origin of the cylinder is
* initialized to (0,0,0). The radius is initialized
* to 0.
*/
public PickCylinder() {
origin = new Point3d();
direction = new Vector3d();
radius = 0.0;
}
/**
* Gets the origin point of this cylinder object.
* @param origin the Point3d object into which the origin
* point will be copied
*/
public void getOrigin(Point3d origin) {
origin.set(this.origin);
}
/**
* Gets the radius of this cylinder object
* @return the radius in radians
*/
public double getRadius() {
return radius;
}
/**
* Gets the direction of this cylinder.
* @param direction the Vector3d object into which the direction
* will be copied
*/
public void getDirection(Vector3d direction) {
direction.set(this.direction);
}
/**
* Return true if shape intersect with bounds.
* The point of intersection is stored in pickPos.
*/
@Override
abstract boolean intersect(Bounds bounds, Point4d pickPos);
// This is a duplicate of the same method, declared private inside of
// BoundingPolytope
// XXXX: remove this once the original method is available (public) in
// BoundingPolytope
static boolean pointInPolytope(BoundingPolytope ptope,
double x, double y, double z ){
Vector4d p;
int i = ptope.planes.length - 1;
while (i >= 0) {
p = ptope.planes[i--];
if (( x*p.x + y*p.y + z*p.z + p.w ) > Bounds.EPSILON) {
return false;
}
}
return true;
}
@Override
Point3d getStartPoint() {
return origin;
}
@Override
int getPickType() {
return PICKCYLINDER;
}
}
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