Sweep in RhinoCommon vs the Sweep 1 Rail Command

Rhino Developer
1

image
image1926×733 26.3 KB

How can I achieve the clean sweep with Brep.CreateFromSweepSegmented in RhinoCommon?

BuggySweep.zip (9.6 MB)

Both trials achieved poor results.

				sweep = Brep.CreateFromSweepSegmented(
						   railCrv,
						   sectionCrvs,
						   true,
						   RhinoDoc.ActiveDoc.ModelAbsoluteTolerance
						   );

			var sweep = Brep.CreateFromSweepSegmented(
					railCrv,
					sectionCrvs,
					Point3d.Unset,
					Point3d.Unset,
					SweepFrame.Freeform,
					Vector3d.Unset,
					true,
					SweepBlend.Local,  //most set to Local, otherwise it messes up the sweep.
					SweepMiter.Untrimmed,
					RhinoDoc.ActiveDoc.ModelAbsoluteTolerance,
					SweepRebuild.None,
					0,
					0.0
					);

I noticed it has been asked before.

2

Sweep1SegmentedBug.gh (7.5 KB)

I’ve also attached a buggy sweep gh test file.

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image2223×1032 185 KB

3

Hi @Wiley,

Try simplifying your rail curve (polycurve with 6 linear NURBS curves) into a simple polyline curve.

Does this help?

– Dale

4

Thanks @dale
But why did the Sweep command work while the RhinoCommon Sweep did this weird twisting thing?

5

When you run Sweep, take note of the direction and location of the seams of the shape curves.

– Dale

6

So how would you change the script I have?

7

Since the two shape curves are identical, why not delete one?

1 Like
8

Yes. Actually using just one profile curve at start is much stabler than trying to orient profile curves manually.