Surfaces are defined in a rectangular array of rows and columns, even though the surface itself may not look like that. Because of this definition, you can extract individual curves in the surface, in this case those on the first or last column or row.
Edge curves are useful as a step in building and modifying surfaces. For example, you probably want to extract edge curves to build a cap surface.
- Select Construct tab > Curves panel > From Surfaces > Trimmed Edge to display the Trimmed Edge dialog in one of these ways:
- Optionally enter a curve name in the Name field, or leave the default name.
- Select the surface you want to use from the
Surface menu, or use the
Pick Surface
button to select it in the Graphics window.
- Click the
Pick Curve
button and pick an edge in the graphics window.
- Optionally select Join adjacent loops to connect the curve to other trim loops that are present in the source surface. You may need to use Undo so you can select/deselect this option to get the required curve.
- Click OK.