Sorry, Worked on it from the office. Hopefully fixed now.

Could anybody write just a brief how to for this Please ?
just a few simple steps to get me going.
Thank you
dave

You can try to export your SVG in Inscape using the "optimized SVG" writer. That will just change semantical stuff, not the paths themselves. I'd assume, that there is a limit at which the controller will stall. Maybe Sandy has more insight on that.
What you can do is lower the number of points by either increasing the distance between the loops or the samplerate at wich it jitters. I have thought about exporting gcode, but then I'd have to figure out the machine specs and stuff.

I've also managed to load a 6+Mb svg before and it was no problem, but it does seem to be size sensitive with respect to the output to Jan's lovely scripts. Once they get below 3Mb, it seems to be happy for me.

I've downloaded the latest release (thanks!) and you can tell that something is up, as the load vector dialogue box just reverts straight back to load vector, whereas when you are loading massive tsp files from the travelling salesman algorithm output, you can tell that it's churning in the background, and slowing down, but evenutally loads. Are there any errors outputted to a text file anywhere that I can look up and try and see if anything is going amiss?

I found a way to shrink the outputted svg from Spiral from image. I tweaked parameters in Inkscape for ages, saved optimised svgs, and none of it worked for me. I was getting 4MB+ svgs, and the processing console was giving lots of 'Ignoring <text> and ignoring <comments> messages. I thought that it was to do with the broken curves at the edge of the image, as losing those made the svgs import. So I put a white border around the edge of my image and it imported!

(1) Get the image you want, select all in the image editor of your choice.
(2) Shift-Scale the image down slightly, so there is a white, blank border that surrounds your image.
(3)Save as something different, then import into SpiralfromImage, and run as normal.
(4)Import into inkscape, and clear up the image by removing any stray arcs within the blank zone.
(5) select all, and then go to file > document properties. There should be a tab that says [+] resize page to content. Click this.
(6) Clean up the document, save as an optimized .svg.
(7) Import into the polargraph controller, enjoy.

I've found that you don't lose too much detail this way, and at least it imports. Thanks Krummrey for incredible code and Sandy for the tips.

Sandy,

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
at geomerative.RSVG.getPolyline(RSVG.java:744)
at geomerative.RSVG.elemToPolyline(RSVG.java:609)
at geomerative.RSVG.elemToCompositeShape(RSVG.java:514)
at geomerative.RSVG.toShape(RSVG.java:149)
at geomerative.RG.loadShape(RG.java:244)
at polargraphcontroller.loadShapeFromFile(polargraphcontroller.java:1276)
at polargraphcontroller$6.run(polargraphcontroller.java:1160)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

These are the most common error reports that processing spits out whenever the output of the spiral-to-image script fails to import.

Any ideas?

After some hours for searching a way to open svg created by SpiralFromImage without opening Inkscape or Illustrator, i found a solution... With a text editor i found some negative numbers as coordinate... without those "-" character all is fine now. So to do that i've just edited the svg.PDE file and change :

output.print(x); by output.print(abs(x));

and
output.println(y); by output.println(abs(y));

Secondly, to display the SVG, i've just changed the original code by :

void displaySVG () {
  clearDisplay();
  String svgLocation = outputSVGName;
  outputSVG = loadShape(svgLocation);
  println("loaded SVG: "+ outputSVGName);
  shape(outputSVG, 187, 85, outputSVG.width/2, outputSVG.height/2);
  feedbackText.setText(locImg+" was processed and saved as "+outputSVGName);
  feedbackText.update();
}

Display of svg in the script, and first test on Little A4 paper...

All hello! Prompt me how to draw Norwegian style? that for this purpose is it necessary to do? thank you