bbox.java

M3DEA (Mobile 3D Engine API) 手机3D引擎API

/*
 *M3DEA - MOBILE 3D ENGINE API
 *Copyright (C) 2006 Alexandre Watanabe         [e-mail]     
 *		     Diego de Freitas           [e-mail]
 *		     Paulo Rodrigo Priszculnik  [e-mail]
 *		     Rodrigo Arthur Lopes       [e-mail]
 *
 * This library is free software; you can redistribute it 
 * and/or modify it under the terms of the GNU Lesser General
 * Public License as published by the Free Software
 * Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 *
 * This library 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 Lesser General Public License for
 * more details.
 *
 * You should have received a copy of the GNU Lesser General
 * Public License along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite
 * 330, Boston, MA 02111-1307 USA
 *
 */

package m3dea.util;

/** Classe que representa um Bounding Box utilizado para fazer c醠culos de colis鉶 nas entidades do engine.
 */
public class BBox
{
    /* Limites do Bounding Box */
    private float xmin;
    private float xmax;
    private float ymin;
    private float ymax;
    private float zmin;
    private float zmax;
    
    /** Construtor que copia um outro Bounding Box 
     * @param box Bounding Box para copiar atributos 
     */
    public BBox(BBox box)
    {
        this(box.xmin, box.xmax, box.ymin, box.ymax, box.zmin, box.zmax);
    }
    
    /** Cria uma nova inst鈔cia da classe 
     * @param xMin Limite inferior do eixo x 
     * @param xMax Limite superior do eixo x
     * @param yMin Limite inferior do eixo y
     * @param yMax Limite superior do eixo y
     * @param zMin Limite inferior do eixo z
     * @param zMax Limite superior do eixo z
     */
    public BBox(float xMin, float xMax, float yMin, float yMax, float zMin, float zMax)
    {
        this.xmin = xMin;
        this.xmax = xMax;
        this.ymin = yMin;
        this.ymax = yMax;
        this.zmin = zMin;
        this.zmax = zMax;
    }
    
    /** Realiza uma transla玢o no objeto
     * @param tx transla玢o no eixo x
     * @param ty transla玢o no eixo y
     * @param tz transla玢o no eixo z
     */
    public void translate(float tx, float ty, float tz)
    {
        this.xmin += tx;
        this.xmax += tx;
        this.ymin += ty;
        this.ymax += ty;
        this.zmin += tz;
        this.zmax += tz;
    }
    
    /** Realiza uma transla玢o no objeto
     * @param vec vetor de transla玢o
     */
    public void translate(float[] vec)
    {
        translate( vec[0], vec[1], vec[2] );
    }
    
    /**
     * Checa colis鉶 do Bounding Box com outro Bounding Box
     * @param box Bounding Box para checar colis鉶
     * @param vec Vetor diretor do bounding Box que est