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Author Topic: Inkscape SVG files problems
simone
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Post Inkscape SVG files problems
on: August 15, 2015, 23:07
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Hi
I am having problems to load correctly svg files from inkscapes, basic geometries seem to work fine but if I add some text and make it into a path it loads weirdly in the controller as you can see in the image attached.

Also consider these 2 paths:

<path
id="path3017"
d="m 483.12041,710.40463 a 6.7950955,6.7950955 0 1 0 -13.59019,0 6.7950955,6.7950955 0 1 0 13.59019,0 z"/>

<path
id="path3019"
d="m 471.47072,726.33063 c 0,-3.75283 -2.78973,-6.54255 -6.54256,-6.54255 -3.75282,0 -6.79509,3.04226 -6.79509,6.79509 0,3.75283 3.04227,6.79509 6.79509,6.79509 3.75283,0 6.54256,-3.2948 6.54256,-7.04763 z" />

the first one will not draw, the second one will.

tx
Simone
Image
sandy
Administrator
Posts: 1317
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sandy
Post Re: Inkscape SVG files problems
on: August 16, 2015, 11:30
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Hello, that's odd isn't it, it looks like all curves are getting thrown out. The letters with straight lines all come out ok, the ones with curves are missing entirely, or at least have parts of their curves missing.

It looks like the q command is being ignored, and I'd say the c as well, but when I draw a freehand shape using c, then it draws ok.

I can't say if this is a problem with the old version of geomerative I'm using, or something new in inkscape (I doubt it), or some stupidity in the controller (most likely). I'll try to get some time to troubleshoot this.

sn
simone
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Posts: 14
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Post Re: Inkscape SVG files problems
on: August 16, 2015, 16:27
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It seems like it is not understanding the "a" element which represents an elliptical arc curve command and the "q" element, quadratic Bézier curve command.
sandy
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Posts: 1317
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sandy
Post Re: Inkscape SVG files problems
on: August 16, 2015, 16:39
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Your first example includes "a" and you said that worked ok though?
simone
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Posts: 14
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Post Re: Inkscape SVG files problems
on: August 16, 2015, 16:54
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No, I said it did NOT work.
sandy
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sandy
Post Re: Inkscape SVG files problems
on: August 16, 2015, 16:56
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Duh, of course you did 🙂 I misread!
simone
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Posts: 14
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Post Re: Inkscape SVG files problems
on: August 16, 2015, 16:56
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Maybe that is due to the fact that standard Gcode does not understands bezier curves? As far as I can see only arcs are supported.
S.
sandy
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sandy
Post Re: Inkscape SVG files problems
on: August 16, 2015, 17:05
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Don't think it's that, the g-code reading is limited to an import filter, internally a g-code file gets converted to a RShape right away. Any g-code limitations are forgotten. To load the SVG, I'm just using Geomerative's default RG.loadShape() method, and always have.

There _has_ been a level of redirection introduced when g-code reading was added. I'll investigate that. I also have a version of this controller running in Processing 2, with the new geomerative library, so will give that a go.

sn
simone
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Posts: 14
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Post Re: Inkscape SVG files problems
on: August 16, 2015, 20:20
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There is a little trick to fix this problem:
-export the svg from inkscape as pdf
-new inkscape file and import the pdf
-resave a new svg file

in this way you get rid of these uncommon bezier curves and elipsis

S.
sandy
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sandy
Post Re: Inkscape SVG files problems
on: August 16, 2015, 20:36
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Great spot Simone, what a pain though!

I wonder if there's an option to control what kind of curves to use when converting to paths. I can't see one, but I'm not an inkscape whizz either.

Just had a test with Processing 2 and the latest Geomerative, and it has the same problem. Either I've broken something in the code, or something's changed in the way that inkscape builds it's paths from text.

sn
simone
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Posts: 14
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Post Re: Inkscape SVG files problems
on: August 16, 2015, 22:39
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SVG is a "standard" you know ..
sandy
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sandy
Post Re: Inkscape SVG files problems
on: August 16, 2015, 22:45
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Well yes .. that's what makes me think it's probably something I've done to break it in the controller.
simone
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Posts: 14
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Post Re: Inkscape SVG files problems
on: August 16, 2015, 23:05
Quote

Image
kongorilla
Pro
Posts: 362
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kongorilla
Post Re: Inkscape SVG files problems
on: August 20, 2015, 21:03
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Something has changed in the way Inkscape converts text to paths. When I encountered this problem, I went back to an older, portable version of Inkscape (.48.4), and all the curves it created were imported into the controller. I did encounter a different problem with the paths from .48.4, though:

Image

(The paths from .48.4 look fine when loaded in .91, but resaving them from .91 doesn't fix the offset curve problem in the controller).
sandy
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sandy
Post Re: Inkscape SVG files problems
on: August 20, 2015, 21:31
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That's good news in a way - it means I haven't broken the controller. In that way, anyway. I've seen that problem before though, and I fixed with by ungrouping the objects and the "break apart" too.
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