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我正在使用Box-2d和AndEngine。我有动态的身体，可以说是Plane。我想以给定的速度连续移动它。所以，我给它设置了一个线性速度。我也有屏幕边界（地面、屋顶、左右墙）。那些是静态的身体。当我的飞机与边界相撞一两次时，它就会停止。我没有对飞机施加重力。为什么飞机虽然速度固定却停止了？ 问题：碰撞后如何以连续的速度和相应的方向移动飞机？之后我想将它移动到用户在屏幕上触摸的位置？

代码：创建平面

FixtureDef FIXTURE_DEF = PhysicsFactory
                .createFixtureDef(1, .5f, 0.5f);

        aPlane = new Plane(222, 333, pilotTexures, vbom) {
            @Override
            protected void onManagedUpdate(float pSecondsElapsed) {
                super.onManagedUpdate(pSecondsElapsed);
            }
        };
        planeBody = PhysicsFactory.createBoxBody(this.mPhysicsWorld, aPlane,
                BodyType.DynamicBody, FIXTURE_DEF);
        mPhysicsWorld.registerPhysicsConnector(new PhysicsConnector(
                aPlane, planeBody, true, true));
        planeBody.setLinearVelocity(DEMO_VELOCITY_X, DEMO_VELOCITY_Y);
        attachChild(aPlane);
        planeBody.setGravityScale(0);
        planeBody.setUserData(PLANE);

代码：创建边界墙

final Rectangle ground = new Rectangle(0, camera_Height - 2,
        camera_Width, 2, vbom);
final Rectangle roof = new Rectangle(0, 0, camera_Width, 2, vbom);
final Rectangle left = new Rectangle(0, 0, 2, camera_Height, vbom);
final Rectangle right = new Rectangle(camera_Width - 2, 0, 2,
        camera_Height, vbom);

final FixtureDef wallFixtureDef = PhysicsFactory.createFixtureDef(0,
        0.5f, 0.5f);
PhysicsFactory.createBoxBody(this.mPhysicsWorld, ground,
        BodyType.StaticBody, wallFixtureDef);

Body roofBody = PhysicsFactory.createBoxBody(this.mPhysicsWorld, roof,
        BodyType.StaticBody, wallFixtureDef);
roofBody.setUserData(ROOF);

PhysicsFactory.createBoxBody(this.mPhysicsWorld, left,
        BodyType.StaticBody, wallFixtureDef);
PhysicsFactory.createBoxBody(this.mPhysicsWorld, right,
        BodyType.StaticBody, wallFixtureDef);

attachChild(ground);
attachChild(roof);
attachChild(left);
attachChild(right);

我还创建了ContactListener，可以在它们碰撞时收听。要在手指触摸点上移动，我还实现了 IOnSceneTouchListener

预先感谢。

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1 回答 1

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您能否尝试将墙壁的弹性设置为 1.0f 并为定期接触消除摩擦，

final FixtureDef wallFixtureDef = PhysicsFactory.createFixtureDef(0,
    0.5f, 0.0f);

至，

final FixtureDef wallFixtureDef = PhysicsFactory.createFixtureDef(0,
    1.0f, 0.0f);

跳这有帮助。

于 2013-07-19T20:13:29.270 回答