/*--------------------*/
/* Ja84Behavior.java  */
/*--------------------*/
import java.awt.event.*;
import java.awt.AWTEvent;
import java.util.Enumeration;               //Enumeration
import javax.media.j3d.*;                   //Java3d
import javax.vecmath.*;                     //Point3f,Color3f

public class Ja84Behavior extends Behavior{

    private WakeupCondition wakeupConditon;
    private TransformGroup vpTrans;
    private Transform3D trans = new Transform3D();
    private float dist = 0.0f;

    public Ja84Behavior(TransformGroup vpTrans){

        this.vpTrans = vpTrans;             //変更対象の幾何ノード
    }

    public void initialize(){

        WakeupCriterion[] event = new WakeupCriterion[1];
        event[0] = new WakeupOnElapsedFrames(0);
        wakeupConditon = new WakeupOr(event);
        wakeupOn(wakeupConditon);
    }

    public void processStimulus(Enumeration enumeration){

        processMyFrameEvent();              //フレーム経過
        wakeupOn(wakeupConditon);
    }

    private void processMyFrameEvent(){

        dist=(dist+0.3f)%48.0f;             //視点の移動量
        trans.set(new Vector3f(0.0f, 0.0f, -dist));
        vpTrans.setTransform(trans);
    }
}