public Triangle getTriangle(Triangle store) {
        if (store == null)
            store = new Triangle();

        Mesh m = geometry.getMesh();
        m.getTriangle(triangleIndex, store);
        store.calculateCenter();
        store.calculateNormal();
        return store;
    }
A <code>CollisionResult</code> represents a single collision instance
between two {@link Collidable}. A collision check can result in many
collision instances (places where collision has occurred).

@author Kirill Vainer
jme3-core/src/main/java/com/jme3/collision/CollisionResult.java