Digital Fab Masterclass

[Robyn Willison]

Hi

Has anyone heard back whether they are in the course or not?

Cheers

Robyn

[Steven Pickles]

Not officially, but from what I hear, the number of applicants matched the number of places well. So it sounds positive.

pix

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[Cyberteque]

Well I got an email saying I was in.
Does anyone know which CAD software is going to be used?

I'm not sure my ASUS eee 900 is going to cut it.
I can run and render in openSCAD, but this little screen can be a bitch!

Andrew

[Steven Pickles]

Email Karen about this, they might have a spare laptop you can use. What answer did you give them about using your own laptop?

pix

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[Andrew Helgeson]

I didn't, she asked me in the email, I mentioned I only have a netbook.

openSCAD works well, so far, on this machine.

any idea what software we are going to use?

Andrew

[Steven Pickles]

It sounds like Zoz prefers to use SketchUp, as it's what he uses to teach the class at MIT.

I just poked into running it in Wine and it's not really usable (lots of screen blackouts and other rendering bugs).

pix

[Andrew Helgeson]

ok, I'll have to brush up on my sketchup skills then.
messed about with it a bit, it can be a "tad" frustrating!

if I want to print something on your huxley, what format/software should i be using?

Andrew

[Steven Pickles]

anything that produces an stl. for engineering-style models i prefer openscad.

pix

[Steven Pickles]

In case I put anyone off trying Sketchup in Wine, I have now managed to get it working for me. I was having the problem that most of the 'working area' would black out frequently when switching tools, only to reappear during an action like rotating the scene. It was vaguely useable if you kept a finger covering the middle mouse button read to do lots of restorative rotations of the scene. This might be an Intel graphics specific thing. Apparently NVidia graphics (using the official NVidia driver) works well.

I installed Sketchup with winetricks:

apt-get install winetricks

winetricks sketchup

At this point I needed to fix a registry setting:

export WINEPREFIX="$HOME/.local/share/wineprefixes/sketchup"

cd $WINEPREFIX/drive_c

wine regedit - <<<__EOF__

REGEDIT4

[HKEY_CURRENT_USER\Software\Wine\X11 Driver]

ClientSideGraphics="N"

__EOF__

Running a winetricks installed app is a bit clumsy:

export WINEPREFIX="$HOME/.local/share/wineprefixes/sketchup"

cd $WINEPREFIX/drive_c

wine cmd /c run-sketchup.bat

This page has some tips about making some shortcuts for running winetricks apps

https://code.google.com/p/winetricks/wiki/CommandlineTips

https://code.google.com/p/winetricks/wiki/RunningInstalledApps

pix

[Andrew Helgeson]

Even under 'Doze, SketchUp and openSCAD give warning messages when you start.
Still haven't found anything that doesn't work though.

Andrew

[Steven Pickles]

The biggest problem I've run in to with openSCAD on lower spec machines is that the in-GPU CSG stuff doesn't work. This means that your quick preview needs to use the fallback "thrown together" rendering method which becomes less useful as your models start to use more complicated CSG operations. You can always hit F6 to bake a real mesh and display that, but on a low spec machine it can be quite time consuming, especially when slicing up imported STLs.

pix