OpenSCAD problems

I've several items about the problem that I am having, but so far nothing has worked.

My problem OpenSCAD file has been narrowed down to this:


scale([1,1,1]) {
import("/Volumes/Storage\ 2/3d/ipadminilandscape_fixed-1.stl");
}


The file was downloaded from :[www.thingiverse.com]

I've run the file through the Netfabb Cloud service, but that did not help.

I am still getting "WARNING: No top level geometry to render" when I try to do the "Compile and Render (GCAL)" option in OpenSCAD.

I am on a Mac using OpenSCAD 2013.03.06 and have also tried the older, released version.

Any ideas how I can fix this?

Thank you!
Perlguy

I would suspect that there is a problem with the STL file, rather than OpenSCAD

I don't know about that. OpenSCAD tends not to like really detailed stls for some reason. Inhave had the same issue before too.

when importing stl files it seems to work best when:

- the scad file and the stl file are in the same directory
- the object location in the stl file is situated over x0 y0 or close to it
- some stl files won't import properly/at all if they sit below z0

also best to put "file = " in there
import(file = "ipadminilandscape_fixed-1.stl");

---

-=( blog )=- -=( thingiverse )=- -=( 3Dindustries )=- -=( Aluhotend - mostly metal hotend)=--=( Facebook )=-

My understanding is OpenScad quantises vertices to a grid which causes a bug when importing STL files with points very close together.

---

[www.hydraraptor.blogspot.com]

According to openSCAD/CGAL the geometry is messed up.

CGAL:olyhedron_incremental_builder_3::
lookup_halfedge(): input error: facet 171 shares a halfedge from vertex 65 to vertex 64 with facet 61.

(Its neat so forum is doing smiley substitution even in code tags...)

And indeed it appears so.

face vertex0='64' vertex1='63' vertex2='65'
...
face vertex0='64' vertex1='126' vertex2='65'

(...and removes xml.)

See attachment lines 406, 516.
AFAIK the vertex order in triangle faces is supposed to follow counter clockwise rule, so when there is 65-64 order in one face, in another there should be 64-65.