pod.java

一个J2Me的赛车游戏

import javax.microedition.m3g.*;
import java.io.*;

public class Pod
    extends Car {

  public Group pod;
  public Pod(World world, String name, float InitPosition[]) {
    try {
      Object3D[] podcar = Loader.load("/res/" + name);

      for (int i = 0; i < podcar.length; i++) {
        if (podcar[i] instanceof Group) {
     //     System.out.println("podload" + name);
          pod = (Group) podcar[i];

          break;
        }
      }
      podcar = null;

      pod.postRotate(RotY, 0.0f, 1.0f, 0.0f);
      world.addChild(pod);
      pod.setTranslation(InitPosition[0], Global.groundtocam, InitPosition[1]);
      pod.postRotate( -90f, 1.0f, 0.0f, 0.0f);
      pod.postRotate( -90f, 0.0f, 0.0f, 1.0f);
      maxspeed = 4;
    }

    catch (Exception e) {
      // ERROR!
  //    System.out.println("Loading error!");
      Global.reportException(e);
    }

  }

  public void update() {
    while ( (RotY) > 360) {
      RotY = RotY - 360;
    }
    while ( (RotY) < 0) {
      RotY = RotY + 360;
    }
   // System.out.println(currentRotY);
    int currentRotYangle = (int) RotY;
// double rads = Math.toRadians(currentRotY);
    camSine = Global.sinTab[currentRotYangle];
    camCosine = Global.cosTab[currentRotYangle];


    pod.translate( -1.2f * carspeed * (float) camSine, 0.0f,
                  -1.2f * carspeed * (float) camCosine);

    carspeed += 0.1;

    if (carspeed >= maxspeed) {
      carspeed -= 0.1;
    }

    if (acspeed > 0.01f) {
      acspeed -= acspeed / 10;
    }

    if (hitbyother) {
      double Hrads = Math.toRadians(HrotY);
      double HcamSine = Math.sin(Hrads);
      double HcamCosine = Math.cos(Hrads);

      pod.translate( -1.2f * Hspeed * (float) HcamSine, 0.0f,
                    -1.2f * Hspeed * (float) HcamCosine);
      Hspeed -= 0.1;
      if (Hspeed < 0) {
        hitbyother = false;
      }
    }
    Checkfield(pod, true);

  }

}