Function Identity

Common/Transforms/vtkPerspectiveTransform.h:54–58

* Set this transformation to the identity transformation. If * the transform has an Input, then the transformation will be * reset so that it is the same as the Input. */

   * reset so that it is the same as the Input.
   */
  void Identity()
  {
    this->Concatenation->Identity();
    this->Modified();
  }

  /**
   * Invert the transformation.  This will also set a flag so that