/*
 *  Simbad - Robot Simulator
 *  Copyright (C) 2004 Louis Hugues
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 -----------------------------------------------------------------------------
 * $Author: sioulseuguh $ 
 * $Date: 2005/04/25 17:54:59 $
 * $Revision: 1.2 $
 * $Source: /cvsroot/simbad/src/simbad/sim/StaticObject.java,v $
 */

package org.myrobotlab.mapper.sim;

import javax.media.j3d.Appearance;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Bounds;
import javax.media.j3d.Transform3D;

/**
 * Base Object for all block world objects (box,wall,arch ...). All object which
 * doesnt move.
 */
public class StaticObject extends BaseObject {
  /** Transformed bounds is the bound object in global coordinates. */
  protected Bounds transformedBounds;
  /** The local to global transform. */
  protected Transform3D localToVworld;

  /** Appearance of the object. */
  protected Appearance appearance;

  /** Create object's geometry. */
  void create3D() {
    super.create3D(false);
    appearance = new Appearance();
    compilable = true;
    localToVworld = new Transform3D();
  }

  /** Create the definitive local to global transform . */
  protected void createLocalToVworld() {
    group.getLocalToVworld(localToVworld);
  }

  /**
   * Create and pre Compute the transformed bound of the objects. Needs
   * localtoVWorld.
   */
  protected void createTransformedBounds() {

    transformedBounds = (Bounds) (localBounds.clone());
    transformedBounds.transform(localBounds, localToVworld);

  }

  /** Gets the bound of the object taking account of its current position. */
  protected Bounds getTransformedBounds() {
    return transformedBounds;
  }

  /**
   * Returns true if the object intersect with the given bounding sphere. This
   * can be overriden.
   * 
   * @param bs
   *          the boundingsphere to intersect with.
   */
  protected boolean intersect(BoundingSphere bs) {
    return transformedBounds.intersect(bs);
  }
}