Description: 5 minutes; Lab exercise: 20 minutes
Adjust two 3D curves at a common point. Merging the curves reduces the number of curves, makes handling the curves for surface creation easier, and generates high quality surfaces.
Adjust Curves can be used to change the connect condition of a curve that is connected to a face or edge of a body with a curvature continuous condition.
You must select two curves which have a common start or end point. Based on where you click the curves (closer to the start or to the end points), the system will determine the common point at which the curves will be adjusted.
If two curves are already adjusted, they can be merged.
When you specify a fix point on the curve, you are specifying the area of change. After selecting Curve 1 and Curve 2, the system will automatically place fix points on the ends of the two curves. To specify additional fix points, click anywhere on the selected curves.
The orange points are the fix points of the curves. It is between these two points that the curves are modified.
The cyan point is the common point and merge position.
This exercise provides hands-on experience using the new Modify 3D Curve command - Adjust Curves - in OneSpace Designer Modeling 2005.
Start OneSpace Designer Modeling and load adjust_2_bsplines.pkg.

Click 3D Curves.
Click Adjust in the Modify Curves section.
Specify Curve 1 and Curve 2.
Keep the default Both in Modify Curves.
Click Through Common Pt.
Click
to complete the operation.
The curves are modified at the common point and remain two separate curves.


Click 3D Curves.
Click Adjust in the Modify Curves section.
Two curves remain with one curve modified.

Try the labs again using the Merge Curves option.
The result will look something like this:

The Adjust Curves command can be used to connect curves to the start or end vertices of the edge of a part. When connecting the curve to an edge, you can specify the connection to be tangential or curvature continuous at the vertices of the edge. This is an alternative to using the Modify Spline command.

Begin with an edge with a curve attached.

Click Adjust in the Modify section.
Click the edge of the part for Curve 1.
Click the spline for Curve 2.
The system will place two fix points on the end of the spline.
Specify a fix point on the curve.
Switch between Tangential and Curv Cont to influence the smoothness of the spline.