How to fragment 2 shapes with complicated shared edge?

[Jennifer]

In my quest to extract puzzle pieces, I can across an interesting problem. I am hoping someone has a solution.

One puzzled has a pair of pieces that share a complicated border.



I traced the bottom (green) piece with the Pen tool. I then traced the top part of the top piece and tried to attach it to the bottom piece. But if I select them both and fragment, the top piece disappears.

Is there a way that I can get 2 pieces without having to trace that shared edge twice?

Thanks

[vojo]

I believe this is what you want to do.

- pick a shape (square or circle or or or)
- a line you want
- overlay line on shape
- developer==> operations==> fragment
- if you want to do this twice, copy line and place both over the shape (will need to recolor afterward)

[wapperdude]

How did you combine them? 
I did simple test case.  Drew two shape, similar to what you have.  Selected both.  Did join.  Select both.  Do fragment.  And that was it.  Two puzzle pieces.

Oh.  Make sure that your 2nd curves endpoints snap to 1st shape geometry.  If not, then this fails.

[Jennifer]

Oh.  Make sure that your 2nd curves endpoints snap to 1st shape geometry.  If not, then this fails.

That's the solution. I thought I was careful to "attach" the end points to the other shape, but I now realize that I had Snap and Glue turned off so I could have finer control over the Pencil tool. I turned them back on, made the connections, and it works.

Thank you.