tcamera.java~21~

一个J2Me的赛车游戏

import javax.microedition.m3g.*;

public class Tcamera {
  private Camera cam;
  private float lookdown = -40;
  private float camRotY = 0;
  public Tcamera(World world, Group groupcamandcar, float f) {
    cam = new Camera();
    groupcamandcar.addChild(cam);
    world.setActiveCamera(cam);

    cam.setPerspective(70, f, 20F, 550);
    cam.translate( -0.0f, 0.0f, 30.0f);
    //    cam.postRotate(90, 0.0f, 1.0f, 0.0f);
    cam.postRotate(lookdown, 1.0f, 0.0f, 0.0f);
    //  cam.setOrientation(10,1.0f,0.0f,0.0f);

    // Create a light
    Light l = new Light();

    // Make sure it's AMBIENT
    l.setMode(Light.AMBIENT);

    // We want a little higher intensity
    l.setIntensity(3.0f);

    // Add it to our world
    world.addChild(l);

  }

  public void update(Key key, float camtran) {
    if (camRotY != 0) {
      if (camRotY > 0.01f) {
        camRotY -= camRotY / 2f;
        cam.postRotate( -lookdown, 1.0f, 0.0f, 0.0f);
        cam.postRotate( -camRotY, 0.0f, 1.0f, 0.0f);
        cam.postRotate(lookdown, 1.0f, 0.0f, 0.0f);

      }
      if (camRotY < -0.01f) {
        camRotY += -camRotY / 2f;
        cam.postRotate( -lookdown, 1.0f, 0.0f, 0.0f);
        cam.postRotate( -camRotY, 0.0f, 1.0f, 0.0f);
        cam.postRotate(lookdown, 1.0f, 0.0f, 0.0f);

      }
    }
    if (key.left) {
      camRotY -= 1f;
      cam.postRotate( -lookdown, 1.0f, 0.0f, 0.0f);
      cam.postRotate( -1f, 0.0f, 1.0f, 0.0f);
      cam.postRotate(lookdown, 1.0f, 0.0f, 0.0f);

    }
    else if (key.right) {
      camRotY += 1f;
      cam.postRotate( -lookdown, 1.0f, 0.0f, 0.0f);
      cam.postRotate( +1f, 0.0f, 1.0f, 0.0f);
      cam.postRotate(lookdown, 1.0f, 0.0f, 0.0f);

    }
    cam.translate(0.0f, 0.0f, camtran);
  }
}