[Bf-committers] KnifeSubdivide and turning corners...

Nathan Vegdahl bf-committers@blender.org
Tue, 9 Sep 2003 07:20:41 -0700 (PDT)

   Well, I can't give you any hints about the code, but I can say a big
thankyou from the Blender community!  This has been a top feature request for a
very long time.  Great work!  Hope you can work out the bugs. :-)

--Nathan "Cessen" Vegdahl

--- Robert Wenzlaff <rwenzlaff@soylent-green.com> wrote:
> I've been made a knife "subdivide tool", where you draw a mouse trail on the 
> screen and the edges are subdivided IFF the verts are selected ans it is 
> intersected by the mouse trail.  Very useful for adding extra geometry to a 
> model.  It's working except for 1 minor flaw, and one anoying behavior 
> (blender's fault not mine!)
> The flaw is, I need to disable gestures while the trail is drawn.   My first 
> thought was to make a G.flag value that bypassed calls to gesture().  It 
> dosn't seem to quite work, maybe I missed one...  I'll look more later, but 
> any hints are appreciated.
> The anoyance is that when turning corners, it creates 4 tris.  If the new 
> diagonal between the subdivided edges were also subdivided (like both new 
> edges in a quad divided in 4), this could be filled with 3 quads instead.   I
> was looking at the code in subdivideflag() and had it working for 1 of the 4 
> cases (edges 1 and 4 have new verts)  but I wasn't sure if my method was 
> safe.  Can I rely on the edges being in sequential order, so that edge1 is 
> always next to edge2?  Or do I need a new method before moving on to the 
> other 3 cases?
> Then, of course,  I need to get the uv mapping right.
> Patch for my knife subdivide tool (against Tuhopuu2) is here:
> http://www.soylent-green.com/KnifeSubT2_rev2.patch  if you want to try it
> out.
> Rev1 fails because of int math roundoff error.  Had to do the math in floats.
> (Usage: Select verts, hit K, LMB drag line, hit K).
> -- 
> ***********************************************
>   "Obscure, Profound it was, and Nebulous, 
>   So that by fixing on it's depths my sight, 
>   Nothing whatsoever I discerned therein."
>     		    -Dante, predicting the 
> 		        Windows 95 API.
> ***********************************************
> Robert Wenzlaff     rwenzlaff@soylent-green.com
> _______________________________________________
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