Create Curves tool box

Place a B-spline curve.

Create a B-spline curve that passes through a set of points while maintaining user-defined tangent directions at those points.

Place a composite curve, which can have line strings, arcs, or Bézier curves as components.

Place or construct a complex chain of arcs that passes through a given set of points.

Place a parabola, hyperbola, or partial ellipse.

Place a clothoid or Archimedes or logarithmic spiral.

Place a helix in a 3D design.

Construct a B-spline curve that is the same distance from the identified element at all points.

Extract a B-spline curve(s) from a solid or a B-spline surface.

Place a curve by defining its mathematical formula.

To construct a curve along the intersection of two 3D elements, use the Construct Trim tool in the Modify Surfaces tool box.

B-spline curve and surface settings are set in the B-spline and 3D dialog box, which is opened by choosing B-spline and 3D from the Element menu.