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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;
/**
* PickSegment is a line segment pick shape. It can
* be used as an argument to the picking methods in BranchGroup and Locale.
*
* @see BranchGroup#pickAll
* @see Locale#pickAll
*/
public final class PickSegment extends PickShape {
Point3d start;
Point3d end;
/**
* Constructs an empty PickSegment.
* The start and end points of the line segment are
* initialized to (0,0,0).
*/
public PickSegment() {
this.start = new Point3d();
this.end = new Point3d();
}
/**
* Constructs a line segment pick shape from the specified
* parameters.
* @param start the start point of the line segment.
* @param end the end point of the line segment.
*/
public PickSegment(Point3d start, Point3d end) {
this.start = new Point3d(start);
this.end = new Point3d(end);
}
/**
* Sets the parameters of this PickSegment to the specified values.
* @param start the start point of the line segment.
* @param end the end point of the line segment.
*/
public void set(Point3d start, Point3d end) {
this.start.x = start.x;
this.start.y = start.y;
this.start.z = start.z;
this.end.x = end.x;
this.end.y = end.y;
this.end.z = end.z;
}
/**
* Gets the parameters from this PickSegment.
* @param start the Point3d object into which the start
* point will be copied.
* @param end the Point3d object into which the end point
* will be copied.
*/
public void get(Point3d start, Point3d end) {
start.x = this.start.x;
start.y = this.start.y;
start.z = this.start.z;
end.x = this.end.x;
end.y = this.end.y;
end.z = this.end.z;
}
/**
* Return true if shape intersect with bounds.
* The point of intersection is stored in pickPos.
*/
@Override
final boolean intersect(Bounds bounds, Point4d pickPos) {
return bounds.intersect(start, end, pickPos);
}
// Only use within J3D.
// Return a new PickSegment that is the transformed (t3d) of this pickSegment.
@Override
PickShape transform(Transform3D t3d) {
PickSegment newPS = new PickSegment(start, end);
t3d.transform(newPS.start);
t3d.transform(newPS.end);
return newPS;
}
@Override
Point3d getStartPoint() {
return start;
}
@Override
int getPickType() {
return PICKSEGMENT;
}
}
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