Hernan Diaz-Alonzo and Florencia Pita Pratt Studio

 

Pantograph perspectives

I’ve been finishing up my studies the past couple of weeks, so not much work has been done on Pantograph. I have, however, been getting to use Pantograph quite a bit, and have some observations:

• Pantograph is now memory-limited, not cpu-limited. Change is good! The culprit seems to be the Polygon library – my hackish misuse of it is beginning to show, and things aren’t pretty. There don’t seem to be any good clipping libraries out there that do exactly what I need, so I need to write a true 2D geometry core. I’m much more confident in the potential speed of Python, though, so I’m still hoping to match the speed of the 3D geometry functions in the 2D clipping.
• The program needs a Blender-native UI. After using the GTK UI in KDE for the past few months, and from peoples’ hassles trying to install GTK in Windows, I have decided to not fight it and rebuild the UI using the Blender toolkit. One less dependency is a good thing.
• Pantograph is still really buggy. Sorry.

I’ve got two weeks in mid-May to sit down and address the bugs and write the 2D clipping code – stay tuned!

 

Windows installation tutorials

Tamito Kajiyama has written a very comprehensive guide to installing Pantograph in Windows.  Thanks, Tamito!

 

Hernan Diaz-Alonzo/ Florencia Pita Review

 

Pantograph 0.4 is out

I’m still working on a few more basic tutorials, and hoping to put some more examples in the gallery.

Some highlights:

• Export an animation to SWF – requires ming-python package
• Export to PDF
• option to re-load last settings
• curve rendering

Enjoy it here!

 

aggregation sur l’herbe

More from H Diaz Alonso and Florencia Pita’s studio at Pratt:

Thanks to Nathan King for identifying the “Stargate” shader!

 

We have picture…

The problem with ming was trivial and stupid. Here’s an animation. This is the last piece of 0.4 left to work out, so barring any big bugs the next version of Pantograph should be out some time this weekend.

I’ve been trying to render a larger file with around 160,000 triangles, and there seems to be a memory hole. Things have gotten a lot faster, but it eats up 8GB way too fast.

 

Pantograph 0.4: Ming the Merciless, sets v. lists, etc.

Pantograph 0.4 is coming along nicely – quite a few features that had been planned for a while have almost reached fruition. Plus, I’ve been able to do a lot of stress-testing with large data-sets, and necessity is a good optimizer. I’ve closed a few huge memory holes, and tightened up a lot of the data structures. Needless to say, the code will need a good laundering after 0.4 – its a mess, and some fundamental paradigms have been shifting.

I’ve been replacing a lot of the lists in Pantograph with sets – it seems I was spending a lot of time removing items from the scene, which can become quite costly when the number of faces is over 100,000.  I’m hoping that sets can squeeze a bit more performance in places where I don’t need ordered sequences.

I’ve got libming (mostly) working – it will make an swf file, but I can’t figure out why its not showing all the frames:

test.swf

Ming won’t do dashed lines, unfortunately (that I can discover). And the Python documentation seems to have been written by accident…

 

Pantograph post-processing: getting smooth curves

Getting smooth curves:

Since Pantograph is working from a faceted model, you’ll never get true smooth splines (believe me, I’ve been trying to figure out how to do that!).  With some quick work in Inkscape, you can vastly improve things.

After ungrouping the drawing (Shift-Ctrl-G), you will be able to select individual polylines

Hit Ctrl-L (“Simplify Path”) until you are satisfied  with the smoothness of the curve.  If there are multiple overlapping linesyou may need to smooth both.

 

lanscape cell(s)

These are preliminary proposals for a park/cultural center in Parana, Argentina, for Florencia Pita and Hernan Diaz-Alonzo’s studio at Pratt: