On Thu, Dec 03, 2009 at 04:13:57AM +0100, Philipp Tiefenbacher wrote:
> I'm playing around with generating scad code...and generated this
> level 3 sierpinsky triangle. when I try to export it openscad writes:
> Object isn't a single polyhedron or otherwise invalid! Modify your design..
sorry for the delay.
the error message is missleading and I have changed it now to:
Object isn't a valid 2-manifold! Modify your design..
in a valid 2-manifold each edge must connect extactly two facets. in your
sierpinsky triangle the edges of the extruded triangles touch each other so
the edge now connects four facets. one possible solution would be to
enlarge the triangles a little bit so they become intersecting.
"In the future, airplanes will be flown by a dog and a pilot. And the
dog's job will be to make sure that if the pilot tries to touch any of
the buttons, the dog bites him." - Scott Adams (author of Dilbert).