Linked or dynamic offsets e.g. of a rectangle in current trunk lack precision, AFAICT (based on tests with archived builds) after the changes in rev 14156 for bug #384688:
https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/14156
Steps to reproduce:
1) launch current trunk with default new prefs, default doc
2) draw a rectangle
3) create linked offset
4) convert to path
5) switch to the node tool to visualize the nodes of the linked offset converted to path
The attached drawing shows a linked offset (radius 20) of duplicated rectangles, created and converted to path with rev 14153 and 14159 on OS X 10.7.5: the results with r14159 are much more imprecise than with r14153.
Tests done with latest trunk r14419 and archived trunk builds on OS X 10.7.5
Todo:
- investigate the scope of regression (types of original shapes, object size, document scale, offset radius ...)
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See also:
http://thread.gmane.org/gmane.comp.graphics.inkscape.devel/954/focus=957
(or http://sourceforge.net/p/inkscape/mailman/message/8200775/ )
«the "imprecise" algo is now the more precise one; the problem whith the old "precise" is that sometimes it doesn't produce the mathematically correct offset, but is faster.»
A few more examples (open in Inkscape trunk, zoom in to 200% or closer, and compare results from 14153 (green stroke) with r14159 (red stroke)).