Export svg?

Programming Questions

ak_eric

in Programming Questions • 1 year ago

Searched the forums and the web, not much on this: I'd like to be able to export curves from processing as a svg, and bring those curves into Inkscape as paths.

Currently I'm using Processing's PDF Export library to do this, which works. But it's not perfect: Inkscape will happily import the pdf and generate strokes from the resultant graphics. But the issue stems from the fact if I create an ellipse in Processing (noFill(), no smooth(), strokeWeight() of 1), in Inkscape the given ellipse has a physical width when I 'convert the strokes to path', giving me a shape with one circular path inside the other, filled with black to define the outline: I need to have a single path matching the curve generated in Processing, not 'one path inside another' (giving a donut \ torus effect).

I've been looking for other pdf export options, but not coming up with much. The Processing PDF Export library has this bit of text:

" There is also a contributed library for exporting images to SVG format; check the libraries section of the website for more information."

However I can find nothing that matches this description in the lower docs. Searching online finds the proSVG plugin, however it seems incompatible with the latest version of Processing.

It's quite possible that Processing's PDF export is doing the correct thing and this is simply my ignorance of how Inkscape works. Or maybe it's possible that the PDF export is exporting 'more than it should', and I need another export solution.

Again, my goal is: Make curves in Processing, see the exact same curves represented as paths in Inkscape. And if you're wondering 'why would I want to do this?': It will allow me to generate graphics in Processing and etch them using my Ostrich-Egg Bot, via the Eggbot Inkscape plugins.

Any thoughts? Thanks

Replies(7)

kashken

Re: Export svg?

1 year ago

A friend of mine and I have been working to do some of the same things you are looking for. In particular, we prototype an SVG in Inkscape, hand edit some of the specifications, import the file as a PShape in Processing, then repeat the cycle. In fact, we both have been able to create SVG files from Processing, but these are pretty simple. The complex ones still require lots of hand work and time. We have developed some Processing code but it generally has a narrow focus (bezier curves for one). Maps of the United States are not in the foreseeable future (use but not creating).

My friend has available a tutorial for this entire undertaking (though he felt like he needed an undertaker at the end). I will point out this post to him and perhaps he will add to discussion.

A big problem is that Inkscape produces SVG elements that are not supported by PShape in Processing. Further, some PShape supported elements in Processing are not handled well in Inkscape.

amnon.owed

Re: Export svg?

1 year ago

There is also a contributed library for exporting images to SVG format; check the libraries section of the website for more information.

Perhaps this is a reference to Geomerative since it has SVG (saving) capabilities.

ak_eric

Re: Export svg?

1 year ago

Just got some stuff working with Geomerative, exporting directly as svg. Looks promising, thanks for the heads up!

iowadave

Re: Export svg?

1 year ago

eric,

If you want to see what Processing is sending to Inkscape, open the SVG file in a text editor. SVG is just a hypertext markup language. The W3C publishes the SVG specification on its web site, http://www.w3.org/TR/SVG11/.

You can edit SVG files in a text editor. As kashken said, sometimes that is a good thing to know when moving stuff between Processing and Inkscape or vice versa. A good set of tutorials for hand-built SVG is available at http://www.svgbasics.com/

Good luck!

ak_eric

Re: Export svg?

1 year ago

thanks for the info: I've never much dealt with svg's before I got the eggbot, so this is a good introductory lesson ;)

pedroam

Re: Export svg?

4 months ago

hey guys.
i would like to export a .svg file by using the geomerative library. i was not able to find any example in the documentation folder.

i've no idea how to use the function, sorry.

import geomerative.*;
RG.init(this);
void (saveShape("test.svg"));
size(500, 500);
background(150);
ellipse(width/2, height/2, 250, 250);

pedroam

Re: Re: Export svg?

4 months ago

ok, i've found this example but seems that is out of date.
what should i change in way to get it working?

import processing.xml.*;
import processing.opengl.*;
import geomerative.*;
size(800, 600, P2D;
smooth();
// VERY IMPORTANT: Allways initialize the library before using it
RG.init(this);
/*
RSVG svg = new RSVG();
RGroup grp = svg.toGroup("tiger.svg");
String strSvg = svg.fromGroup(grp);
String[] lstStr = split(strSvg, "\n");
saveStrings("test.svg", lstStr);
*/
RShape grp = RG.loadShape("Lion.svg");
RG.saveShape("test.svg", grp);
exit();

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