Curve BSpline Curve

You can create bspline curve by several construction types. Click View, Geom Curve to toggle the display of individual curve.

To create a bspline curve:

In the BSpline Curve dialog, we define two types b-spline curves: Piecewise and Natural. Piecewise b-spline curve is a polygon chained by points, so it's C0 continuity. Natural b-spline curve looks more smooth than Piecewise curve, its degree is usually set as 3.

In the dialog, select the type of you want to create the bspline curve:

Make it close
a. Only interpolation points
b. Interpolating curve on surface
Make it close
a. Sketch four coner points onto mesh
b. The final four sketched curves
Make it close
c. Check Elastic on All Mesh and sketch two points
d. The final sketched curves

 

Make it close Make it close
a. Raw shell
b. Curve from Mesh. See check option in figure c.
c. In gen. sel dialog, check "ByEdge", check "Prop", input "Ang" as 30.
Make it close
a. Two shells
b. Intersection curve of two shells
Make it close Make it close
a. Raw curves
b. After snapping, By Extend is checked.
c. Using Trim->Mutual to trim edges , and delete the small curves
Make it close Make it close
a. Raw curve
b. Respace By Number, num = 7.
c. Respace By Number, num=5
Make it close Make it close Make it close
a. Raw curves. The green curve is a spaced curve. We want to respace the red curve by green curve.
b. Respace result by Projection using Direction as Default .
c. Respace result by Projection using Direct as "Y" .
d. Respace result by Mapping
Make it close
a. Raw curves "LSTC" and a cylinder surface.
b. Map "LSTC" to surface. U scale is 0.6, V scale is 0.2.

Make it close
a. Raw curves "LSTC" and a cylinder surface.
b. Map "LSTC" to surface. U scale is 0.6, V scale is 0.2.

Make it close
a. End point in raw closed curve.
b. Curve after adjusting the end point