It's theoretically possible but would require some hacking.



I'd start by running headless.

	http://java.sun.com/developer/technicalArticles/J2SE/Desktop/headless/



... then you'd need a way of updating the Display2D.  The easiest way  

to do it is to fire up the Console, probably by just calling  

pressStart().



	SwingUtilities.invokeLater(new Runnable() { public void run() {

		console.pressStart();

		} });



... last you'll need a way to take a picture at some point.  What I  

would do is steal some code from Display2D.takeSnapshot().  Let's say  

you want to generate a PNG.  I'd do something like this:



	SwingUtilities.invokeAndWait(new Runnable() { public void run() {

		try {

			Graphics g = display.insideDisplay.getGraphics();

			BufferedImage img = display.insideDisplay.paint(g, true, false);

			g.dispose();

			OutputStream stream = new BufferedOutputStream(

				new FileOutputStream(new File("/tmp/output.png")));

			PngEncoder encode = new PngEncoder(img, false,  

PngEncoder.FILTER.NONE, 9);

			stream.write(encode.pngEncode());

			stream.close();

		    } catch (Exception e) { /* oh well */ }

		} });



This is just off the top of my head.  No doubt there are other issues  

still.



Sean



On May 3, 2010, at 12:33 PM, Mark Coletti wrote:



> It is possible to save a snapshot of a simulation from the GUI.   

> However, I would like to do the same from a _headless_ MASON  

> configuration.  That is, I want to run MASON from the command line  

> and have it emit PNG snapshots of the simulation; this will _not_ be  

> from within a GUI.  Is there a convenient way of doing this?

>

> Cheers,

>

> Mark Coletti

> [log in to unmask]

>