Boolean operator intersect after edge split do not work #30447

New Issue

Martin Felke · 2012-03-04T11:43:41+01:00

Martin Felke commented

2012-03-04 11:43:41 +01:00

%%%Hello,
when i try to use boolean modifier intersect after edge split modifier,
either with applying the edge split modifier or not, a message appears
"Cannot execute boolean operation" in the boolean modifier.

When i dont redirect the blender error messages to a file, blender hangs then
and needs to be restarted.

I made several attempts, for error messages see error.txt
To reproduce, open provided blend and try to apply boolean operations with
the cube and the object shaped like a big T.
Without edge split, incorrect results occur.
With edge split it doesnt work at all.

The T mesh object was converted from a Text object, with double verts removed and
separating loose parts of the mesh and origin to geometry.

Tested under Ubuntu 11.10 64 bits, blender rev 44610.

Specs:
CPU: i7 2600
GPU: Geforce GTX 580
RAM: 16 GB

%%%

%%%Hello, when i try to use boolean modifier intersect after edge split modifier, either with applying the edge split modifier or not, a message appears "Cannot execute boolean operation" in the boolean modifier. When i dont redirect the blender error messages to a file, blender hangs then and needs to be restarted. I made several attempts, for error messages see error.txt To reproduce, open provided blend and try to apply boolean operations with the cube and the object shaped like a big T. Without edge split, incorrect results occur. With edge split it doesnt work at all. The T mesh object was converted from a Text object, with double verts removed and separating loose parts of the mesh and origin to geometry. Tested under Ubuntu 11.10 64 bits, blender rev 44610. Specs: CPU: i7 2600 GPU: Geforce GTX 580 RAM: 16 GB %%%

Martin Felke commented

2012-03-04 11:43:41 +01:00

Changed status to: 'Open'

Sergey Sharybin commented

2012-03-04 21:37:18 +01:00

%%%Boolean operation cam work only with volumes, but adding edge split makes mesh non-manifold which makes boolean modifier behaves incorrect.
The only real issue i can see here is incorrect handing of T letter which happens because of degenerated faces (there's some zero-sized faces where | is connecting to --). This happens because Carve can't detect if this face is inner or outside. Probably code-side workaround would be not sending degenerated faces to Carve, but will also inform Tobias aboud such problem, maybe we can have some support from Carve side.%%%

%%%Boolean operation cam work only with volumes, but adding edge split makes mesh non-manifold which makes boolean modifier behaves incorrect. The only real issue i can see here is incorrect handing of T letter which happens because of degenerated faces (there's some zero-sized faces where | is connecting to --). This happens because Carve can't detect if this face is inner or outside. Probably code-side workaround would be not sending degenerated faces to Carve, but will also inform Tobias aboud such problem, maybe we can have some support from Carve side.%%%

Sergey Sharybin commented

2012-03-07 11:50:10 +01:00

%%%unfortunately that code-side workaround wouldn't work because it'll make mesh non-manifold. But can think about much easier workaround for this case: apply remesh modifier on text so there'll be no more degenerative geometry and boolean operation should just work.%%%