Geometry problem importing 3D DWG file to Skp

bizkonson

Im importing a not so big 3D DWG file into sketchup.
the imported model starts to "flicker" when i zoom in
and the worst part of it is sketchup cant lock on to end points of the geometry.

im using sketchup 14 on windows 7 pro
my computer is I7 3770k running at 4550, 16gb ram and Gforce gt760 gpu.

its not a GPU problem since all other even larger models work fine.

i tried using 3dmax as a mid way for the dwg file.
but 3ds and obj resulted in same geometry problem.

im including the dwg file.

any help or advice would be highly appreciated.

GROUND.dwg

Box

Can't look at the file but it sounds like a clipping plane issue created by the origin of the DWG being a long way from the SU origin.

Dave R

It looks something like this?

You're seeing Z-fighting due to surfaces being too close together for the OpenGL and your graphics card to resolve.

bizkonson

@dave r said:

It looks something like this?
[attachment=0:24fxfyjb]2014-11-12_13-02-42.png[/attachment:24fxfyjb]

You're seeing Z-fighting due to surfaces being too close together for the OpenGL and your graphics card to resolve.

You are wrong it has nothing to do with the GPU.
ive had models imported from 3dmax that were even closer.
and ive built models with details smaller then a mm.
so its not the GPU.
i belive the problem is due to Autocad having a different system for understanding endpoints. and non of the skp plug-in importers can resolve it.

Box

It is a clipping plane issue, which is a graphics issue.

It could be several things.
The layers you have left in the .dwg
it could be the origin of one of the many groups
a combination of both
something else

I exploded the whole model and your issue goes away, which suggest to me it is a CAD origin problem.

Edit: I just imported your drawing retaining the origin, which you can choose in the import options, and it shows the model 693136.411m from the origin. A known clipping issue.

Box

And as you can see here, by correcting the origin your GPU issue goes away. No Z-fighting or clipping plane.

bizkonson

thanks box!
i actually solved it yesterday night as well by copying it to another file and exploding and regrouping.