DeleD Community Edition

chronozphere · Posted: Wed Feb 17, 2010 6:48 pm Post subject: Merge tool finally working 100%

Chronozphere proudly presents:

...

A working merge tool! Very Happy

> Create the mesh at the left
> Select all its polygons
> Merge!

See the result:

Will be available in DeleD 2.43. Smile

@Paul-jan: I'll upload the patch soon. First I need to tidy up some things.

EDIT: just discovered a small bug in it (merging complex geometry can have bad results).. It's too complex to fix, so I won't do that. A better approach might be to redesign the merge tool from scratch someday, but this will do for now. Smile

Paul-Jan · Posted: Wed Feb 17, 2010 7:48 pm Post subject:

Hey, awesome job, and kudos for adding the screenshot!

As long as the "complex problematic situations" are not too common and things didn't get much worse than they used to, I'll be more than happy to merge in your patch... Wink

chronozphere · Posted: Wed Feb 17, 2010 8:53 pm Post subject:

The complex problem i'm talking about is this:

> Create a cylinder
> Select a cap
> Inset that polygon twice
> Select all polygons that form the cap
> Merge.

Sometimes it works as it should, but sometimes it leaves two oddly-shaped polygons that cannot be merged. I believe this problem has always been there. Smile

chronozphere · Posted: Wed Feb 17, 2010 10:05 pm Post subject:

wow.. I am brilliant! Very Happy

I seem to have fixed the bug by moving some code around (I was playing lol Razz

) It's now possible to merge incredibly complicated surfaces.

After playing with the "new merge" I realized that there might be one thing missing. At this moment, merge creates concave polygons which is not desirable in most of the cases. Should we add another check to prevent this, or should this still be possible?

I also realized that I spend most of my DeleD development time on the merge tool. It's my territory now muhaha. Twisted Evil

Dragonsbrethren · Member Joined: 12 Apr 2009 Posts: 21

Hey, that's great. I'm working on something now that could definitely benefit from the improvement, since the merge tool currently isn't working too good for it.

Jeroen · Posted: Thu Feb 18, 2010 7:32 am Post subject:

Good job! A correct working merge polygon tool is important to have. And indeed, it is complex material to get right, and I'm glad this is fixed now.

Concave polygons are something DeleD always offered and I think this should stay this way. After all, some users may actually want their geometry to be concave. If not, DeleD has the tools to make things convex anyway (Optimize).
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