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 Subject: Spline Trouble

Darchind opened this issue on Jan 11, 2013 · 8 posts

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  Darchind ()  ( posted at 8:43PM Fri, 11 January 2013 


Suppose I have one rectangle that I want to join into a shape below it so that they become one geometry, but simply "fusing" the vertices doesn't seem to accomplish the task.

What I am trying to do, specifically, is create the geometric piece for what would be a bra strap. What am I doing wrong?


  LuxXeon ()  ( posted at 10:55PM Fri, 11 January 2013 

Fusing only aligns the vetices to the same coordinates.  You need to weld them.

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  Darchind ()  ( posted at 11:25PM Fri, 11 January 2013 · edited on 11:26PM Fri, 11 January 2013

Hmm, I tried using Refine to create two points on the lower line to weld the vertices of the upper rectangle, and now it says..."Boundary splines do not form a closed loop" when I apply the Garment Maker modifier.


  Darchind ()  ( posted at 11:53PM Fri, 11 January 2013 · edited on 11:53PM Fri, 11 January 2013


I think I may have found the problem. I've circled it in pink, but I don't know how to get rid of it. There are two "green" vertices that stick out past where the cut is supposed to be.


  LuxXeon ()  ( posted at 7:51AM Sat, 12 January 2013 · edited on 8:03AM Sat, 12 January 2013

Quote - I think I may have found the problem. I've circled it in pink, but I don't know how to get rid of it. There are two "green" vertices that stick out past where the cut is supposed to be.

Those aren't vertices.  They are tangents of the bezier vertices in red.  They act as "handles", to add curvature to the spline segments.

At this point, I would really suggest going back to basics here.  Start with perhaps a few tutorials on clothing creation in Max using polygonal modeling techniques; even tutorials from other modeling applications would translate pretty cleanly to most of the tools in Max.

PS:  If you are determined to continue with splines, then you can, if need be, change those points to corner points or smooth points by selecting them as you have done, then right click in the viewport, and in the quad menu that pops up, select either corner or smooth as vertice type.  It appears they are currently set to Bezier or Bezier corner.

When you are doing spline modeling, you need to be very mindful of vertice type, and numbering.  For something like this, you are going to need cross-sections so you can apply a SURFACE modifier, and vertice numbering order is essential for that.  This is why I'd personally prefer to model it with polygonal techniques.

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  LuxXeon ()  ( posted at 11:04AM Sat, 12 January 2013 

Remember, if you are going to export this and distribute it for use in other apps, Garnment Maker uses delaunay triangulation to approximate the surface volume, and smoothing the result can give you bad Ngon topology.  This is fine if you plan to use it directly in Max with cloth simulation, but could result in a bad topology or very dense object meshing, if you need to export for use in other apps.

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  Darchind ()  ( posted at 3:17PM Sat, 12 January 2013 


I've decided to scrap spline modeling and just edit raw primitives. I also decided that I wouldn't rely much at all on modifiers, but rather I'd freeform-sculpt it and add quickslices when need be. I only applied the Turbosmooth modifier one time, and this is what I came up with along the way:


  LuxXeon ()  ( posted at 7:01PM Sat, 12 January 2013 

Quote - I've decided to scrap spline modeling and just edit raw primitives. I also decided that I wouldn't rely much at all on modifiers, but rather I'd freeform-sculpt it and add quickslices when need be. I only applied the Turbosmooth modifier one time, and this is what I came up with along the way:

Much better, don't you think?  I think the surface looks ok in shaded view, and I'm sure the topology is far better than it would be with Garnment Maker.  GM is ok if you plan to keep the results in the Max pipeline, and want to run cloth simulations; otherwise, I think you took the smarter route by starting with a good quadrangular mesh, and going from there.  Did you add a shell modifier for thickness?

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