public void vertex(float x, float y, float z, float u, float v) {
    vertexTexture(u, v);
    vertex(x, y, z);
  }


  /**
   * Internal method to copy all style information for the given vertex.
   * Can be overridden by subclasses to handle only properties pertinent to
   * that renderer. (e.g. no need to copy the emissive color in P2D)
   */
//  protected void vertexStyle() {
//  }