我正在 JME3 中开发游戏，出于某种原因，我的空间播放器正在（向上）从我的世界飞走。我看不出我错过了什么，你能看看并告诉我如何让玩家留在世界上吗？
public class Main extends SimpleApplication {
private BulletAppState bulletAppState;
public static void main(String[] args) {
Main app = new Main();
app.start();
}
Node playerNode = new Node("player");
Spatial player;
@Override
public void simpleInitApp() {
bulletAppState = new BulletAppState();
stateManager.attach(bulletAppState);
bulletAppState.getPhysicsSpace().setGravity(new Vector3f(0f,-9.81f,0f));
speed = 10.0f;
//World
Spatial world = assetManager.loadModel("Scenes/city/sound_city.j3o");
world.setLocalScale(2.0f);
CollisionShape worldcshape = CollisionShapeFactory.createDynamicMeshShape(world);
RigidBodyControl rworld = new RigidBodyControl(worldcshape);
rworld.setMass(0f);
bulletAppState.getPhysicsSpace().add(rworld);
world.addControl(rworld);
rootNode.attachChild(world);
//Player
player = assetManager.loadModel("Models/player/player.j3o");
playerNode.attachChild(player);
CollisionShape playerShape = CollisionShapeFactory.createDynamicMeshShape(player);
RigidBodyControl plr = new RigidBodyControl(playerShape,123.0f);
plr.setFriction(1f);
plr.setMass(60f);
bulletAppState.getPhysicsSpace().add(plr);
player.addControl(plr);
rootNode.attachChild(playerNode);
//SoundModel
Spatial sound = assetManager.loadModel("Models/sound/sound.j3o");
sound.setLocalScale(0.3f);
sound.setLocalTranslation(3.0f, 0, 5.0f);
sound.rotate(0, FastMath.DEG_TO_RAD*-40, 0);
rootNode.attachChild(sound);
Spatial sound2 = sound.clone();
sound.setLocalTranslation(3.0f, 0, 6.0f);
rootNode.attachChild(sound2);
//Light
DirectionalLight sun = new DirectionalLight();
sun.setDirection(new Vector3f(-0.1f, -0.7f, -1.0f));
rootNode.addLight(sun);
initCam(player);
initKeys();
}
private void initCam(Spatial player) {
cam.setLocation(player.getLocalTranslation().add(0, 30.0f, 0));
cam.lookAt(playerNode.getLocalTranslation(), Vector3f.UNIT_Z.negate());
// cam.lookAt(playerNode.getLocalTranslation(), Vector3f.UNIT_Y);
// cam.setRotation(cam.getRotation().fromAngles(FastMath.DEG_TO_RAD*90, FastMath.DEG_TO_RAD*180, 0));
// Disable the default flyby cam
flyCam.setEnabled(false);
// Enable a chase cam
ChaseCamera chaseCam = new ChaseCamera(cam, player, inputManager);
// chaseCam.setTrailingEnabled(false);
chaseCam.setDefaultHorizontalRotation(FastMath.DEG_TO_RAD*(90));
chaseCam.setDefaultVerticalRotation(FastMath.DEG_TO_RAD*(90));
}
private void initKeys() {
//WASD
inputManager.addMapping("Left", new KeyTrigger(keyInput.KEY_A));
inputManager.addMapping("Right", new KeyTrigger(keyInput.KEY_D));
inputManager.addMapping("Up", new KeyTrigger(keyInput.KEY_W));
inputManager.addMapping("Down", new KeyTrigger(keyInput.KEY_S));
//ArrowKeys
inputManager.addMapping("Left", new KeyTrigger(keyInput.KEY_LEFT));
inputManager.addMapping("Right", new KeyTrigger(keyInput.KEY_RIGHT));
inputManager.addMapping("Up", new KeyTrigger(keyInput.KEY_UP));
inputManager.addMapping("Down", new KeyTrigger(keyInput.KEY_DOWN));
inputManager.addListener(analogListener, new String[]{"Left", "Right", "Up", "Down"});
}
private AnalogListener analogListener = new AnalogListener() {
public void onAnalog(String name, float value, float tpf) {
if (name.equals("Left")) {
player.rotate(0, value*speed, 0);
}
if (name.equals("Right")) {
player.rotate(0, -value*speed, 0);
}
if (name.equals("Up")) {
Vector3f v = player.getLocalRotation().getRotationColumn(2).normalize().mult(speed*value*1.4f);;
playerNode.move(v.negate());
}
if (name.equals("Down")) {
Vector3f v = player.getLocalRotation().getRotationColumn(2).normalize().mult(speed*value);;
playerNode.move(v);
}
}
};
@Override
public void simpleUpdate(float tpf) {
//TODO: add update code
}
@Override
public void simpleRender(RenderManager rm) {
//TODO: add render code
}
}