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/*
* Copyright 1997-2008 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;
/**
* An abstract class for describing a pick shape that can be used with
* the BranchGroup and Locale picking methods.
*
* @see BranchGroup#pickAll
* @see Locale#pickAll
*/
public abstract class PickShape {
// Use for picking
static final int PICKRAY = 1;
static final int PICKSEGMENT = 2;
static final int PICKPOINT = 3;
static final int PICKCYLINDER = 4;
static final int PICKCONE = 5;
static final int PICKBOUNDINGBOX = 6;
static final int PICKBOUNDINGSPHERE = 7;
static final int PICKBOUNDINGPOLYTOPE = 8;
static final int PICKUNKNOWN = 9;
/**
* Constructs a PickShape object.
*/
public PickShape() {
}
/**
* Return true if shape intersect with bounds.
* The point of intersection is stored in pickPos.
*/
abstract boolean intersect(Bounds bounds, Point4d pickPos);
// Only use within J3D.
// Return a new PickShape that is the transformed (t3d) of this pickShape.
abstract PickShape transform(Transform3D t3d);
// Get the start point use to compute the distance
// with intersect point for this shape.
abstract Point3d getStartPoint();
// Return the distance between the original of this
// pickShape and iPnt
double distance(Point3d iPnt) {
Point3d p = getStartPoint();
double x = iPnt.x - p.x;
double y = iPnt.y - p.y;
double z = iPnt.z - p.z;
return Math.sqrt(x*x + y*y + z*z);
}
// Return one of PickShape type constant define above
abstract int getPickType();
}
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