gravityvisitor.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.physics;

import m3dea.entities.*;

/**
 * Classe que aplica colis鉶 aos objetos de cena
 */
public class GravityVisitor extends EntityVisitor
{
    private float acceleration;
    
    /**
     * Cria nova inst鈔cia de GravityVisitor
     * @param acceleration acelera玢o da gravidade
     */
    public GravityVisitor(float acceleration)
    {
        this.acceleration = acceleration;
    }

    /**
     * Recebe um Sprite para aplicar gravidade
     * @param node Sprite para aplicar gravidade
     */
    public void visitMobileEntity(Sprite node)
    {
        float[] vec = node.getMoveVector();
        vec[1] -= acceleration * 0.5f;
        node.setMoveVector( vec );
    }

    /**
     * N鉶