Creating a Spined Surface from two boundaries and two drives

Once you have started the Spined Surface command, you can proceed as follows.
Please note that you can follow this step-by-step example by loading file: "sr_01_11.e3".


 

1 To obtain an associative surface, that is an open solid — a Skin —  retaining a link to its base curves, so that if you modify such curves the surface will be modified accordingly, check the Associative Mode box. See " Associative Surfaces (Skins)" for details.
2 Select the spine curve (or chain of curves) and end selection by right-clicking and selecting Continue in the context menu.



To change the selected spine curve (for example if you selected the wrong one by mistake), right-click on Spine in the selection list, select Reset and perform selection again.
3 Select the two boundaries and end selection by right-clicking and selecting Continue in the context menu.



To change the selected boundary curve (for example if you selected the wrong one by mistake), right-click on Boundaries in the selection list, select Reset and perform selection again.

Closed Boundaries
When you use two drive curves, closed boundaries are not allowed. If you use close boundaries, the second drive will be ignored.

A preview is immediately displayed:




Two boundaries
When you select just two boundaries, you can specify the weights of each of the two boundaries in the 1st Weight and 2nd Weight boxes respectively. Weights are values in the range (0,1): the higher the weight, the more affected by the corresponding boundary the resulting surface will be.


4 Select the first drive curve and end selection by right-clicking and selecting Continue in the context menu.



Select the second drive curve:



A preview is immediately displayed:



To change the selected drive curves, right-click on the corresponding items in the selection list, select Reset and perform selection again.
5 Click More Options to display additional options.
  • The endpoints of the boundary curves are constantly kept on the drives. This causes a deformation of the boundaries along the path: the scaling. You can select the type of scaling in the Scaling drop-down list. See "Setting the scaling along two drives" for further details.
  • If the spine is a chain of curves, you can choose whether to obtain a single surface or as many surfaces as the number of curves the spine is made of. Select one of the options in the Surfaces drop-down list. See "Setting the number of resulting surfaces" for further details.
6 Click or to confirm your selections and create the surfaces.



Click to discard your changes.
Ticks and Trips