+Curve On Surface
This curve is sketched right onto the surface. Notice the dialog box to the far left. The radio button selected is 'COS' which stands for 'Curve On Surface'. This is a standard function in surface modeling software programs such as Alias|Wavefront's Alias Studio and Rhino3d. Each mentioned tool has a function for 'COS' curve sketched onto a surface.

+Details
To initiate this function, simply pick the radio button for COS. The user will be promoted for a surface to sketch onto. After the designer selects the surface simply start sketching. Try using snap functions for locking to the end of the surface. Also look at tangency issues. In the case just to the left, the upper end point of the 'COS' or Curve On Surface is forced 'Normal' to the 'FRONT' DTM.

+Next
The next feature after exiting the Superfeature command, is a Pro/SURFACE trim function using the previous COS curve as a tool to cut with.

+Surface Trim using Curve
The Pro/SURFACE trim function that looks at the COS function from above.

+Layered off
The Bounding Box is layered off in this screen capture

+internal Curve
Although a bit premature, this is a good time to place in the internal curve that we will ultimately use later.

+Next
We will build up the three part boundary trickery like we did on the front for the back of the seat.

+The Sweep
Four part boundary made up in parts.

+Next
The next features are a combination of Pro/SURFACE trims and Superfeature for offsetting nominal wall and publish geometry. Most is a bit out of scope for this workshop. We do However, offer a three day workshop in this called our Pro/SURFACE level 5 workshops. Primarily dealing in import geometry, these tutorials focuses on offsetting geometry to create nominal wall instead of Shelling.

+Surface Trim
The completed Surface Trim