Print3D Toolbox -- Intersection bug #35123

New Issue

George Anderson · 2013-04-28T05:07:00+02:00

George Anderson commented

2013-04-28 05:07:00 +02:00

%%%OSX, 2.67RC1

- Short description of error ---

mesh.print3d_check_intersect() does not work, even for simple cases.

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

I attached a .blend file. There are 3 identical mesh objects in it, except that each one has been translated (in local coordinates, not using object.location) by a different amount.

Run mesh.print3d_check_intersect() (from the new print 3d addon in the sidebar) on each one. Each will label a different number of faces as "self-intersecting" even though none of the faces are intersecting.

It appears to be related somehow to the concavity and to normals, which may be just a design limitation, but it is also affected by translating the mesh, which is quite illogical.

Note that the "Mesh Analysis" function in the Toolshelf (N) does not appear to have this issue.%%%

%%%OSX, 2.67RC1 - Short description of error --- mesh.print3d_check_intersect() does not work, even for simple cases. - Steps for others to reproduce the error (preferably based on attached .blend file) --- I attached a .blend file. There are 3 identical mesh objects in it, except that each one has been translated (in local coordinates, _not_ using object.location) by a different amount. Run mesh.print3d_check_intersect() (from the new print 3d addon in the sidebar) on each one. Each will label a different number of faces as "self-intersecting" even though _none_ of the faces are intersecting. It appears to be related somehow to the concavity and to normals, which may be just a design limitation, but it is also affected by translating the mesh, which is quite illogical. Note that the "Mesh Analysis" function in the Toolshelf (N) does not appear to have this issue.%%%

George Anderson commented

2013-04-28 05:07:00 +02:00

Changed status to: 'Open'

George Anderson commented

2013-04-28 05:09:09 +02:00

%%%Wait, should I have reported this bug under the addons tracker, since the Print3D toolkit is an addon?

If that's true, my apologies. I can repost it there.%%%

%%%Wait, should I have reported this bug under the addons tracker, since the Print3D toolkit is an addon? If that's true, my apologies. I can repost it there.%%%

George Anderson commented

2013-05-24 20:27:45 +02:00

%%%Someone else seems to be having trouble in the forums:

http://blenderartists.org/forum/showthread.php?292770-How-accurate-is-the-Print3D-addon

It's not quite the same as my bug, but perhaps it's related.%%%

%%%Someone else seems to be having trouble in the forums: http://blenderartists.org/forum/showthread.php?292770-How-accurate-is-the-Print3D-addon It's not quite the same as my bug, but perhaps it's related.%%%

Campbell Barton commented

2013-06-24 18:17:23 +02:00

%%%The intersection tests can be improved but when you move far the center point you start to loose precision (which is the cause of the problem).

this is more of a todo then a bug,

closing.%%%

%%%The intersection tests can be improved but when you move far the center point you start to loose precision (which is the cause of the problem). this is more of a todo then a bug, closing.%%%

Campbell Barton commented

2013-06-24 18:17:23 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2013-06-24 18:17:23 +02:00

Campbell Barton commented

2015-08-24 00:30:49 +02:00

Changed status from 'Archived' to: 'Resolved'

Campbell Barton self-assigned this 2015-08-24 00:30:49 +02:00

Campbell Barton commented

2015-08-24 00:30:49 +02:00

Resolved blender/blender-addons@30e801eb06