Managing transitions

Transitions are edges between adjacent curves in the base curve set. If you look at the base curves, they are points where continuity is only positional: there is no tangency continuity.

• Opening transitions
  are the transition points where the generation of the draft is not well defined: there are different ways to create the filling surfaces. This is the reason why they are subject to choice.
• Closing transitionsare always obtained by the intersecting of the two adjacent surfaces.

As soon as the More Options button is selected, The Transitions item is displayed in the selection list and a cross marker is displayed on each transition point.



Initially, all transition points belong to the same group (see the Points (Group 1 Default) selector in the selection list).

• To define the type of transition for all the points of Group 1, click on Points (Group 1 Default). The Transition drop-down list will be displayed in the model:
  
  
  
  You can choose the transition type among the following:

  Tangent	To create a cylindrical filling surface:
  Sharp	To create a sharp edge by simply extending the two concurrent surfaces:
  Curvature miter	To create an edge keeping only curvature continuity with both concurrent surfaces:
  Tangency miter	To create an edge keeping only tangency continuity with both concurrent surfaces:
  Flat	To create a flat filling surface:

  The chosen transition type will be applied to all the transition points belonging to the group.

• To change the transition type for one or more points, you'll have to move it/them to another group:
  1. Click on the next yellow Points (Group n) item in the selection list
     
     
     
     
  2. Click on the point(s) to be moved
     
     
     
     
  A new Transition drop-down list will be displayed, enabling you to choose the transition type you desire for the points of the new group.