Description: 5 minutes; Lab exercise: 20 minutes
Create a fillet curve with a defined radius between two 3D curves. The two curves will be trimmed, or cut, at the position where the fillet starts.
When Merge is on, the two curves and the fillet curve connect into one part, and the two original curves are trimmed. The resulting new fillet part is always a b-spline fillet. If Merge is off, the original curves are trimmed, but retain the vertices where they join the fillet, and a new fillet curve is created. In some situations, when Merge is switched off, the resulting fillet curve is a circle (an analytic curve).
By specifying part names as you proceed, you may control whether the result of the creation of the fillet is one part, two, or three. For example, if you name your original curves /p1 and /p2 and Merge is on, by default OSDM will create /p3 and remove the curves from their original parts. If Merge is off, OSDM will designate only the fillet curve as /p3 and keep the /p1 and /p2 curves in their original parts.
When Feedback is on, you see curvature feedback for the radius of the fillet.
You may click Radius and enter a value, or move the mouse along the arrow to position the radius as shown in the illustration.

This exercise provides hands-on experience using the new fillet feature in OneSpace Designer Modeling 2005.
If you enter a value for the radius that is too large, you will get an error message indicating that the curve intersection failed during fillet creation.

OSDM trims the original curves, and creates a b-spline fillet, keeping the resulting part as /wire1:

Try creating the fillet with Feedback checked and with Merge unchecked to observe the differences:

The illustration above shows the curvature feedback. OSDM creates the fillet below, with Merge off, the original curves named /wire1, the retained vertices of the original curves, and /p1, the part name for the fillet curve.
