[Bf-committers] draw loop

car bf-committers@blender.org
Sat, 13 Sep 2003 11:28:02 -0400

No complaints. It just needs some basic improvements. Like drawing a 
on a plane should make a circle. But no biggie. This is cool anyway..

On Wednesday, September 10, 2003, at 06:00  AM, 
bf-committers-request@blender.org 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).