I want to Copy a bunch of objects to a surface (elipse) and I want them to point to the middle.
As you van see they are oriented perpendicular to the curve (in this example I am using curves, I guess the same principles apply), but I need the to point to the center of the elipse.
How can this be done?
Wow so many commands/options in Rhino, very impressive.
Probably in this case its not going to do me good.
I need to copy several instances of Prongs with irregular intervals to a surface like in the picture.
Any other idea?
Hi Robert - Orient, Copy=Yes, Scale=No, I think, is what you are after. Snap the target points to the curve (Near or Point OSnap if you have your irregular locations marked) and to the center of the ellipse.
I did a screencapture of what I’m after, I am following a tutorial on Digital Tutors and this is the way the instructor is doing it.
But as you can see the prongs don’t orient in the right way, I actually just realized that they should not point to the center of the ellipse, but perpendicular to the path that they are snapping to.
Hi Robert- he’s using OrientOnSrf - the object is oriented so that the original’s Cplane Z direction is mapped the the surface normal. For rotation, the vector between the two reference points is mapped to the target surface U direction if no rotation is specified.
Yeah, you may need to set Rotation to Prompt and snap to a point in the center of your ellipse. Start with the prongs aligned to X or Y and set your reference point at the mid between the centers and along X or Y as looks best. That direction will determine how the default rotation is on the surface - it will align to U on the target surface. If your surface’s UV is ‘around’ then I’d think either U or V will align ‘radially’ . Post your file if you like, I’ll take a look.
Many thanks Pascal, I included the file at the bottom, and will have another play with your suggestions.
I also have two other issues if you don’t mind
In the image below you can see some weird shading artifacts, it seems as if the edges are off or overlapping, but I cannot find anything like that?
And then I have a problem with this surface, for what I remember it was quite alright in the beginning but something as happened to it along the way. Any suggestion on a way of fixing?
I see … I assumed the file you posted had the surfaces you are working with. If it is not a planar surface, OrientOnSrf and set Rotation to Prompt - snap the rotation to a center marker.
-Pascal