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Help moving polysurface to new, skewed location?

I am new to Rhino 4.0 and looking for suggestions related to the attached file.  How might I smoothly pull the patch from its current position (blue curve) to the new position (red curve)?

If creating a new surface to mimic the patch is advised, how would you approach it?  I do like the bumps and furrows.  Precision is not especially important - the machine tool will ignore tiny gaps, etc.

Details

I am trying to patch a non-planar hole with a polysurface while maintaining the contours of the polysurface as much as possible.  The target is skew to the patch's non-planar boundary.

In the attached file:

1) A "simple" outline of the patch (blue curve), meaning the convoluted edges of the polysurface have been bypassed in creating a boundary curve that I hoped would be useful as a control curve.

2) The target (red) curve which conveniently (?) shares some edges with the curve above.

3) The patch is made up of three polysurfaces that were a) trimmed from their 3 parents with a "tubular" surface, then b) trimmed where they intersect each other, and c) joined.  The edges of the patch are convoluted in places due to the origin curves of the parent polysurfaces.

Thanks for any advice.

John

 

Tags: cage, control, edit, move, points, polysurface, smooth

Views: 139

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Permalink Reply by Pascal Golay on April 26, 2012 at 9:33pm

Hi John- see if this file is close enough- these notes are in the file as well-

1. Make a Patch surface(red) across the target curves.
2. Make a new patch surface (White) on the source curves. When you make this patch use 'Select starting surface' with Pull=0 and Delete input= no, Preserve edges=No This will make sure the new patch has the same UV structure as the first one.
3.FlowAlongSrf your surfaces from the second patch to the first one.

-Pascal

pascal-at-mcneel-dot-com

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Permalink Reply by J. John MixSon on April 29, 2012 at 8:07am

Thank you, Pascal! That works quite well indeed.

I was able to create each "control" patch by selecting the entire curve and using the Patch command. For future reference, how did you do it? I noticed your isocurves are oriented differently than mine.

Permalink Reply by J. John MixSon on April 30, 2012 at 6:05am

I should have said my isocurves are oriented differently than yours.  Just hoping to learn a little more.  Thanks.

Permalink Reply by Pascal Golay on April 30, 2012 at 8:08am

Hi John- as I recall I found one loop as two curves and one as a closed loop in your file - it may be that the pick order of the two curves makes a difference as to how Rhino sets the orientation.

-Pascal

Permalink Reply by J. John MixSon on April 30, 2012 at 3:08pm

OK.  I joined the segments prior to Patching.  Thank you again.

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