Editing 3D splines using the ‘Properties’ palette

Editing 3D splines

In addition to format properties, you can change geometric properties of a 3D spline in the Properties palette.

• Spline type
  You can turn a B-spline into a cubic spline and vice versa.
  However, this does not change the type of B-spline consisting of control points or interpolated points.
  When converting a cubic spline into a B-spline, Allplan always uses the B-spline from control points type.
• Degree of a B-spline (1 to 10)
  The more control points a B-spline has, the higher the Degree you can set.
  The Degree of cubic splines is preset to 3; you cannot change this value.
• Select the Closed option to close open 3D splines.
• Control point number and Interpolated point number take you from point to point. In doing so, you can change the coordinates of each point.
• You can define the Start tangent and End tangent of cubic splines.
  • Instead of matching the coordinates of one point on the Start tangent and End tangent, you can click to match the entire 3D element and then click the required point on the element.
• You can see the Length of a cubic spline.