Flipping Chips on boardgame

Hi, I got a problem with the type of my CollisionShapes. I’m working on a board game where you should snap your stones in the midst of the board. In the middle is a little hole, which brings the most points.
I have 3 kinds of objects in the game: the board, some bouncers and the stones.

Now to my problem. I defined these objects with the following code (" ** " just to emphasize):

    Spatial boardSpat = assetManager.loadModel("Models/board/board.j3o");
    **CollisionShape boardShape = CollisionShapeFactory.createDynamicMeshShape(boardSpat);**
    Node boardNode = PhysicsHelper.createPhysicsNode(assetManager, boardShape, 0);
    boardNode.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(0.0f, -0.2f, 0f)); //0.4 height
    mat_board = new Material(assetManager, "Common/MatDefs/Light/Lighting.j3md");
    mat_board.setTexture("DiffuseMap", assetManager.loadTexture("Models/board/crokinole cut.png"));


    Spatial bouncerSpat = assetManager.loadModel("Models/bouncer/bouncer.j3o");
    **CollisionShape bouncerShape = CollisionShapeFactory.createDynamicMeshShape(bouncerSpat);**
    Node bouncerNode = PhysicsHelper.createPhysicsNode(assetManager, bouncerShape, 0);
    bouncerNode.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(0.0f, -0.2f, 0f));
    bouncerSpat.setMaterial((Material) assetManager.loadMaterial("Materials/iron.j3md"));

and stones

    stoneSpat = am.loadModel("Models/stone/stone.j3o");
    **CollisionShape stoneShape = CollisionShapeFactory.createDynamicMeshShape(stoneSpat); //0.32 height**
    stoneNode = PhysicsHelper.createPhysicsNode(am, stoneShape, 20.0f); // 3.0f vorher
    stoneGhost = new GhostControl(stoneShape);

As you can see, all 3 objects have dynamic CollisionsShapes. As long as they’re defined like that, the game is working and setImpulse() (which uses applyImpulse() on the stones) is working. But the hole doesn’t have any effects on the stones, i.e. they’re just gliding above.

If I now define the board and bouncers like this
CollisionShape boardShape = CollisionShapeFactory.createMeshShape(boardSpat);
(without dynamic), than the hole is working, but the stones are just flipping around randomly with setImpulse(). I don’t change anything else.

Here is the Code of setImpuse():

public void Impulse(float force, float angle, float width) {
    force = force / (width * 0.45f) * 400;
    System.out.println(force + "   " + angle);
    angle = angle / (width * 0.45f) * 400;
    float c = (float) (this.angle);
    angle = 0.225f * angle - 45.0f;
    Vector3f v1 = Translate.posToVector(force * -1f, c - angle, 0.0f);
    Vector3f v2 = Translate.posToVector(0.0f, 0.0f, 0.0f);
    this.stoneNode.getControl(RigidBodyControl.class).applyImpulse(v1, v2);

I really appreciate help and if you need any more information, ask me please.

Objects that move have to have a mass and can only be convex, objects that have no mass may not move but can be concave. So your board should have no mass and your stones should have a mass in case your board doesn’t move. If it does you’re probably at a loss, you could try a GimpactShape for the board which allows concave objects that move but uses a LOT more processing power.

The board has no mass
Node boardNode = PhysicsHelper.createPhysicsNode(assetManager, boardShape, 0);
and the stones have a mass
stoneNode = PhysicsHelper.createPhysicsNode(am, stoneShape, 20.0f);

And the board doesn’t move.

Then your “PhysicsHelper” probably doesn’t do it correctly.

rb = new RigidBodyControl(1);
→ creates a dynamic rigidbody with a convex HullCollisionShape

rb = new RigidBodyControl(0);
→ creates a static rigidbody with a concave MeshCollisionShape

Also enable the physics debug display so you actually see the generated collision shapes.

I already used the debug mode, and the collision shapes are looking just right.
I gonna look in the PhysicsHelper again, as soon as I can spare time.

Here’s my PhysicsHelper class’ only function. I don’t see any problems, but I use
RigidBodyControl control = new RigidBodyControl(shape, mass);

    public static Node createPhysicsNode(AssetManager manager, CollisionShape shape, float mass) {
        Node node = new Node("PhysicsNode");
        RigidBodyControl control = new RigidBodyControl(shape, mass);
        return node;

It’s copied from a tutorial, but I thought, that I understood it so far…