Surface Patch

Patch surface is for constructing a BSpline surface filled from contiguous BSpline curves which form its boundaries. The algorithm accepts two, three or four BSpline curves as the boundaries of the target surface. A range of filling styles - more or less rounded, more or less flat - is available. Click View, Geom Surface to toggle the display of individual surface.

To open patch surface:

To create a patch surface,

1. Select patch type: Flat, Middle, Round and Constrained. "Flat" type has the flattest shape. "Middle" type is Coons surface which is a little rounded style of patch. "Round" type is of curved surface which is the most rounded surface. Constrained will use fit method to get a proper surface.

2. Select 2~4 edges.

3. If the raw curves are noisy, please check "Smooth Curves" option.

a. Four boundary curves
b. Patch surface using "Flat" option