private void createCollisionMesh(Mesh mesh, Vector3f worldScale) {
        this.worldScale = worldScale;
        bulletMesh = Converter.convert(mesh);
        this.numVertices = bulletMesh.numVertices;
        this.numTriangles = bulletMesh.numTriangles;
        this.vertexStride = bulletMesh.vertexStride;
        this.triangleIndexStride = bulletMesh.triangleIndexStride;
        this.triangleIndexBase = bulletMesh.triangleIndexBase;
        this.vertexBase = bulletMesh.vertexBase;
        createShape();
    }
creates a collision shape from the given Mesh
@param mesh the Mesh to use
jme3-jbullet/src/main/java/com/jme3/bullet/collision/shapes/GImpactCollisionShape.java