I just wanted to test the (newly available in AS3) 3D Physics engine Jiglib.
My first test for Box2d was to build a Jenga-style game (Jonga) so I thought I would do the same here. Only a quickie this. I wanted to see if Jiglib would be able to allow ‘rigid boides’ in a 3D environment with good performance. I know we are limited in Flash so was prepared for a few foibles.
Jiglib has been put to great use in other formats so I had high hopes for its Flash port.
Now I have only given the library 3 or 4 hours of play but my one major probelm so far is the frame rate hit. In Jonga3d I have had to reduce the number of blocks to 15 (5 layers – I wanted 15 (45 blocks)) and I am still only getting 6fps. I was really hoping for more.
I’m not complaining too much, a 3d physics engine is a complicated library to pull off – I’m just waiting for the day I can build an unfettered 3d environment with a workable physics engine.
Jiglib has a few other problems – the jiggling static box for example – but these are understandable for v0.25
Testing Jiblib: Jonga3D
In the test I didn’t get around to implementing the mouse drag interactions so to see a collapse use the arrow keys to control the sphere – ram it into the stack.
I am using Jiglib 0.25 – Away3d version and Away3D 2.3 (Link)
I use SwfProfiler to track the fps.
Thanks to SleepyDesign for getting the ball rolling on this.
Swingpant's Game Lab 
Not looked at the source, but the behaviour of the boxes seems to be a lot worse than in the original jiglib, so all the jiggling can’t be due to the basic algorithm. I would look at:
1. Collision – it looks like the collision shapes don’t really map to the rendered shapes very well (there’s a lot of penetration that happens).
2. The jiggling could be due to the box masses/inertia tensors not being set up correctly.
Still – nice to see/play with this!
– Danny