PDA

View Full Version : convert Ngon by deleting extra points?

Multiman
08-24-2006, 11:09 PM
I guess its a long shot but I'm looking for a way to select all points that are part of an Ngon but not connected to intersecting edges. I'll explain:

I have done a boolean operation which has left me with large numbers of points along the edges of the 'hole'. If I check 'hide new edges' in the boolen object, the polys become Ngons and although the edges are tidied up, I am left with a lot of extra points that I would like to delete. I would like a way to be able to delete all these points in one go without having to go through and do them individually - which is taking me forever!. The 'remove Ngons' function simply adds new edges to these points whereas I want to get rid of them. How can i do this?

hope this makes sense,

cheers

DD
Srek
08-25-2006, 07:26 AM
You can simply delete the points. The ngon will be adjusted accordingly. However this will of course change the shape of your n-gon.
Other options are melt and weld that allow to keep the connected polygons.
I can't see another option, since CINEMA can't read your thoughts on which points to remove in which way.
Cheers
Björn
Per-Anders
08-25-2006, 07:34 AM
There's no really fast way i'm faraid, you can select the ngon then shift click on the points mode and it will convert the selection to points, then you can just deselect the points you don't want to delete before hitting the delete key, but that's about it. A tool could be written in C++ easily enough to do the job, of course that's not really a viable option here.
Multiman
08-25-2006, 07:46 AM
I dont mind changing the shape of the ngon. The idea is to select and delete points that are 'free floating' ie not at the intersection of two (visible) edges - so there is actually a method to the madness rather than it being a case of trying to read my mind.

Thanks for answering though. I thought it might be a long shot. Looks like its simply down to some serious mouse clicking.

cheers

DD
Jimstein
08-25-2006, 10:09 AM
Funny that I just e-mailed maxon asking them to input this option in the "Optimise tool", so I not alone want this ;)


Srek: What we are asking for is to remove remove vertices on edges with valence of degree 2. (Valence is the number of edges that use that vertex). This would sometimes speed up our mesh cleanup a whole lot.
AdamT
08-25-2006, 01:23 PM
Funny that I just e-mailed maxon asking them to input this option in the "Optimise tool", so I not alone want this ;)


Srek: What we are asking for is to remove remove vertices on edges with valence of degree 2. (Valence is the number of edges that use that vertex). This would sometimes speed up our mesh cleanup a whole lot.
Good suggestion--gets my vote.
Erik Heyninck
08-25-2006, 09:47 PM
1/ select the edges that are perpendicular to the n-gon. this can probably been done with a ring selection
2/ convert that selection to points by holding shift
3/ invert the selection, eventually check the rest of the geometry to see that only those intermediate points are selected
4/ delete the selected points
Erik Heyninck
08-25-2006, 09:57 PM
This is how I would do it in images
Multiman
08-26-2006, 12:56 AM
Thanks Erik. I did actually try that but the mesh is too complicated to select the perpendicular edges like that. It would probably take me as long as it would to go through and highlight the points.

I've almost finished the job manually now but i do think it would be a useful function to have in the future.

cheers

DD
CGTalk Moderation
08-26-2006, 12:56 AM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.