Tweak tool on spiro paths straightens all segments

[Daniel Prien]

add circle, convert to path, add spiro splines LPE..
tweaktool on shape turns all curves to straight lines

[Thomas Hicks (hicks-kingtom)]

This is caused by the fact that the simplify operation converts all smooth nodes, and replaces them with newly positioned corner nodes. This then causes the spiro spline code to see that section as a strait line and not a curve section.

[bbyak (buliabyak)]

Spiros and Tweak simply do not mix. We need to think how to enforce that their separation.

[Alexandre Prokoudine (alexandre-prokoudine)]

Same bug with Eraser and any LPE.

Perhaps all Tweak Tool and Eraser should be LPE powered.

[Beluga (buovjaga)]

Using the mode "push part of path" I see the bad effect.

Win 7 64-bit
Inkscape 0.91 r13725

[jazzynico (jazzynico)]

Also reproduced on Windows XP, Inkscape 0.91 and 0.92.x rev. 15032.

[Jabiertxof (jabiertxof)]

By design this is imposible to fix, you need to convert item to pats to flatten LPE. Please mark as wont fix.
Maybe we can show a message about in the status bar.