MicroStation CONNECT Edition Help

To Twist a B-spline Surface About an Axis

  1. Select the Twist Surface tool ( Modeling > Surfaces > Modify Surfaces ).

  2. Select the B-spline surface or mesh element.
  3. Enter a data point to define the start of the axis.
  4. Enter a data point to define the end of the axis.
  5. (Optional) Modify the axis by dragging the handles.
  6. Enter a data point to define the reference point for the start of the twist.
  7. Enter a data point to define the end reference point for the twist.

    Left: Infinite is off | Right: Infinite is on.