Nasty bug in 'Hide Edge'

Using SW2004 SP2:

I have a repeatable ugly bug related to hiding edges of multibody parts
in a drawing. Here are the steps to reproduce it:

1. Sketch a 1-1/2" circle on the front plane.

2. Offset the circle 1/4" to the inside.

2. Extrude to your favorite depth, making a tube.

3. Create a plane offset some distance from the front plane. In the
right side view, this plane should be to the right of the existing
body.

4. Sketch a 1-1/4" circle on the new plane.

5. Offset the circle 1/4" to the inside.

6. Extrude to your favorite depth, but make sure that the end result
is a part with two bodies.

7. Save.

8. Create a new drawing.

9. Add the front view of the model to the drawing.

10. For notation purposes, we'll denote the 4 edges in the drawing view
starting from the outermost edge and working toward the middle as
follows:
A1 (SOLID LINE)
B1 (HIDDEN LINE)
A2 (SOLID LINE)
B2 (SOLID LINE)
A1 is the outer edge of one body, B1 is the outer edge of the other
body and so on.

11. Right click edge A2 and select 'Hide Edge'. All seems well.

12. Rebuild. All still seems well.

13. Do a full rebuild via CTRL-Q. All is *not* well. Edge B2 has
disappeared.

14. Highlight the missing edge B2 (make sure your system options are
set up to select hidden edges in drawings).

15. Right click on B2 and note that 'Hide Edge' is the option given.
Select it. No change. Rebuild. No change. CTRL-Q. No change.

16. Right click on B2 and note that 'Show Edge' is now the option
given. Select it. Edge A2 appears! Rebuild. No change.
CTRL-Q. Edge A2 disappears again!

17. Right click on the hidden edge A2 and select 'Show Edge'. Edge A2
appears. Rebuild. No change. CTRL-Q. Edge B2 reappears.


Some other interesting facts:


A. Overlapping of edges isn't even necessary to see this bug. If you
resize the 1-1/4" circle to 3/4", the same behavior occurs. Ditto of
you increase the 1-1/4" ciricle to 2-1/4".

B. Reversing the 'depth' of the bodies (i.e. by reversing the offset
direction of the plane used to create the second body) does not have any
effect on the bug. Hiding edge A2 *still* causes edge B2 to disappear.

C. The behavior is not limited to circular geometry. Change everything
to squares above and the same thing happens.

Jim S.

 

Happens in SP1 also.

Richard

 

Richard Doyle wrote:

Interestingly, I had a co-worker using SP1 try this and the behavior is
there as you note, but it was slightly different. For him, the edges
were reversed. In other words, hiding B2 caused A2 to disappear. He
was using the model and drawing I created with SP2.

Adding a third body further complicates things.

Jim S.