Terminology

• The Normal type in Multi-Surface Draft is equivalent to the Flange type in Draft/Flange.
• The Height option in Multi-Surface Draft is equivalent to the Surface Depth option in Draft/Flange.

Draft/Flange functionality added to Multi-Surface Draft

• You can now select free curves as input when Type is set to Draft.
• You can now also select input curves that are not G1 continuous. In fact you can box-select any combination of curves, whether they are disjoint (non-touching), G0 (position continuous) or G1 (tangent continuous). As before, all G1 continuous curves can be selected by clicking one of them, when Chain Select is turned on.
• The Double-Sided option from Draft/Flange has been added. When Double-Sided is turned on, the Single Surface option also appears.
  

  Double-sided draft surfaces built from four non-G1 free curves.

• Intersect Flanges is a new option that handles corner conditions when two flange surfaces meet. Turn on this option to automatically trim or extend the surfaces at corners.
  

  Left: draft angle = 35; surfaces are extended, intersected and trimmed. Right: draft angle = -35; surfaces are intersected then trimmed.

New Pick Mask feature

We have added a new section to the control window called Pick Mask. It contains check boxes allowing you to turn off the selection of Surface Isoparm, Surface Trim Edge, Curve (not available when Type is set to Normal) and/or Curve-on-surface. This in turn lets you use selection boxes to select only certain types of curves.

Enhanced Control window

In addition to the new options, we have added a section called Surface Structure that contains the Surface Type and Bezier Surfaces options, previously found at the top of the control window.

Draft pull direction

Multi-Surface Draft already uses Vector Options in the control window to determine the direction of the pull vector.

We did not implement the draft vector manipulator from the Draft/Flange tool in Multi-Surface Draft, to be consistent with more recent tools.

Suggested workflow

1. Choose Surfaces > Draft Surfaces > Multi-Surface Draft ❒ to open the control window and set the Pick Mask options, depending on what types of curves you want to select as input.
2. Box-select all of your curves.
3. Click the Recalc button to build the draft or flange surfaces.
4. Adjust the surface parameters through the control window and click Recalc again, or turn on Auto Recalc.