Thanks C R.
Unfortunately, simply erasing the overlap, or deleting the rings behind won't fix it for me. Also, the problem isn't just the overlap that I've shown. There is also some distortion of the curves that I didn't show. Or at least there seems to be....
I'm trying to make 2 linked rings. So that after I Difference them, I need to go back and close one of the gaps. So to make sure I maintain the proper curve, I was using a duplicate of the original ring behind it. Then after I close the paths, I can adjust the handles, with the ring behind to match the curves. That's how I noticed that something was "off".
But if it's just a positioning error, maybe I just need to make sure they just have the same x and y position?
Ok, I will report it. Is it ok if I quote from your reply? That will give a hint for whoever might be interested, since I don't have the technical understanding to give any hints.
After I make the report, I'll reply to this thread again, with a link to it.
Thanks again, brynn __________________________ From: C R Sent: Sunday, April 24, 2016 9:27 AM To: Inkscape User Community Subject: Re: [Inkscape-user] Difference difference
Heh, interesting! I'm getting a new and different offset error in inkscape trunk. It does not appear to be a problem with the difference boolean op, (fortunately) but rather the position of the result is off by a little.
I'm not sure what causes this, but I suspect it's a roundoff error to do with the precision. To fix, simply erase the shapes directly behind your result, or use snapping to snap the
It is a bug though. Whether it's one that can be easily fixed, I have no idea. :)
I say file a bug report for it.
My 2p. -C
On Sun, Apr 24, 2016 at 3:19 PM, Brynn <brynn@...3089...> wrote:
Thanks C R.
That was the first thing I thought too, at first. The bottom object must have a stroke. But as I said, they are both filled with no stroke.
Here's link to SVG file: http://inkscapecommunity.com/jd/imgs/diff-diff.svg . It has the rings already duplicated. So to reproduce, select the top green and top gold rings, and do Difference.
Thanks again :-) brynn
___________________________________ From: C R Sent: Saturday, April 23, 2016 12:05 PM To: Inkscape User Community Subject: Re: [Inkscape-user] Difference difference
Could not duplicate the error, however if you have a stroke applied to your shapes that is the same colour as your fill, that may explain what we are seeing here. :)
Boolean shape ops are done to fills only, and do not take into account line thickness on the resulting paths (this is intentional).
-C
On Sat, Apr 23, 2016 at 6:21 PM, Brynn <brynn@...3089...> wrote:
Hi Friends, It seems like I should know the answer to this. But I don't recall hearing about it. Starting with these 2 rings, which have fill and no stroke: http://inkscapecommunity.com/jd/ss/diff1.png I duplicate both, and then Difference. At 100% zoom they look ok. But zoom in (in this case, all the way, for best view) and you can see that the Difference wasn't correct. http://inkscapecommunity.com/jd/ss/diff2.png It's not a huge amount, but I would expect there shouldn't be any difference at all. This on Windows 7, 64-bit, sp1, Inkscape 0.91, 32-bit, exe installer. Is that a bug? Or is there some reason it's expected not to be precise?
Thanks for your help :-) brynn
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