java如何在3D场景中移动3D对象

Question

我使用jme3游戏引擎，我有一个空间场景的更新代码

public void simpleUpdate(float tpf) {

    playtime = System.currentTimeMillis() - starttime;
    int speed = 25 * 80000;
    Vector3f camDir = cam.getDirection().clone().multLocal(speed * tpf);
    Vector3f camUp = cam.getUp().clone().mult(speed * tpf);
    Quaternion roll = new Quaternion();
    Quaternion yaw = new Quaternion();
    Quaternion pitch = new Quaternion();
    camDir.y = 0;
    Vector3f xRotation = ufoControl.getPhysicsRotation()
            .getRotationColumn(0).normalize();
    Vector3f yRotation = ufoControl.getPhysicsRotation()
            .getRotationColumn(1).normalize();
    Vector3f zRotation = ufoControl.getPhysicsRotation()
            .getRotationColumn(2).normalize();
    Vector3f rotate = new Vector3f();
    if (fx) {
        /*
        AudioNode audioSource = new AudioNode(assetManager, "Sound/fx.ogg",
                false);
        audioSource.setVolume(3);
        audioSource.setPositional(false);
        //   audioSource.setLooping(true);
        audioSource.play();
        */
        effect.setLocalTranslation(ufoControl.getPhysicsLocation());
        effect.emitAllParticles();
    }
    if (left) {
        roll.fromAngleAxis(-FastMath.QUARTER_PI / 3, cam.getDirection());
    }
    if (right) {
        roll.fromAngleAxis(FastMath.QUARTER_PI / 3, cam.getDirection());
    }
    if (up) {
        roll.fromAngleAxis(0, cam.getDirection());
    }
    if (down) {
        roll.fromAngleAxis(0, cam.getDirection());
    }
    if (forward) {
        roll.fromAngleAxis(0, cam.getDirection());
    }
    if (backward) {
        roll.fromAngleAxis(0, cam.getDirection());
    }
    if (pitch1) {
        System.out.println("PITCH1");
        roll.fromAngleAxis(-FastMath.QUARTER_PI / 2, cam.getDirection()
                .cross(Vector3f.UNIT_Y));
    }
    if (yaw1) {
        System.out.println("yaw1");
        roll.fromAngles(0, FastMath.QUARTER_PI / 2, 0);
    }
    if (halt) {
        System.out.println("a halt");
        ufoControl.clearForces();
        //roll.fromAngles(0, FastMath.QUARTER_PI / 2, 0);
    }
    if (roll1) {
        System.out.println("roll1");
        roll.fromAngleAxis(-FastMath.QUARTER_PI / 2, cam.getDirection());
    }
    CollisionResults results = new CollisionResults();
    // System.out.println("1 #Collisions between" + ufoNode.getName()
    // + " and " + jumpgateSpatial.getName() + ": " + results.size());
    ufoNode.collideWith((BoundingBox) jumpgateSpatial.getWorldBound(),
            results);
    // System.out.println("2 #Collisions between" + ufoNode.getName()
    // + " and " + jumpgateSpatial.getName() + ": " + results.size());
    CollisionResults results2 = new CollisionResults();
    // Use the results
    if (results.size() > 0 && playtime > 50000) {
        System.out.println("playtime" + playtime);
        System.out.println("#Collisions between" + ufoNode.getName()
                + " and " + jumpgateSpatial.getName() + ": "
                + results.size());
        // how to react when a collision was detected
        CollisionResult closest = results.getClosestCollision();
        System.out.println("What was hit? "
                + closest.getGeometry().getName());
        System.out
                .println("Where was it hit? " + closest.getContactPoint());
        System.out.println("Distance? " + closest.getDistance());
        ufoControl
                .setPhysicsLocation(jumpGateControl2.getPhysicsLocation());
        System.out.println("Warped");
    } else {
        // how to react when no collision occured
    }
    if (results2.size() > 0) {
        System.out.println("Number of Collisions between"
                + ufoNode.getName() + " and " + moon.getName() + ": "
                + results2.size());
        // how to react when a collision was detected
        CollisionResult closest2 = results2.getClosestCollision();
        System.out.println("What was hit? "
                + closest2.getGeometry().getName());
        System.out.println("Where was it hit? "
                + closest2.getContactPoint());
        System.out.println("Distance? " + closest2.getDistance());
    }
    if (myClient != null) {
        Message message = new ActionMessage(1, myClient.getId(), right, 1);
        Message message2 = new ActionMessage(2, myClient.getId(), left, 2);
        Message message3 = new ActionMessage(2, myClient.getId(), up, 3);
        Message message4 = new ActionMessage(2, myClient.getId(), down, 4);
        Message message5 = new ActionMessage(2, myClient.getId(), forward,
                5);
        Message message6 = new ActionMessage(2, myClient.getId(), backward,
                6);
        if (myClient != null) {
            myClient.send(message);
            myClient.send(message2);
            myClient.send(message3);
            myClient.send(message4);
            myClient.send(message5);
            myClient.send(message6);
        }
        if (player2update == true) {
            System.out.println("simpleUpdatePlayer2 player 2 "
                    + message.toString());
            time = System.currentTimeMillis();
            simpleUpdatePlayer2(tpf);
        }
    }
}

我们现在可以忽略多人游戏代码

UFO运行不畅，似乎UFO的转向和控制有些不稳定。它的“右”和“左”移动几乎正确，“向前”和“向后”似乎完全正确。我想知道你是否能看到控制UFO可以改善什么

完整的代码可以从我的存储库https://github.com/montao/spaceworld3d