Motor Flash Physics: demo scenes

To keep you posted about the motor development, here are some more (fairly simple) demo scenes. I am still unhappy with the overall performance, because there is neither a quick boundary check nor some kind of space partitioning here. But that’s exactly what I am working on right now. My favorite is the buoyancy demo, and there will be a much more realistic version with wave propagation soon.

Flabby bridge

Attracted spheres

Stay upright constraint

Simple Buoyancy

(All demos open in a popup window and require the newest Flash Player)

Collision detection with Recursive Dimensional Clustering

I have written a tutorial about speeding up collision detection using a space partitioning algorithm called Recursive Dimensional Clustering. Watch a demo. You can find the full article and source code here.

Revised AS3 loop comparison table

I have just noticed that besides the for..in syntax there is a new syntax in AS3:

for each (i in object)
{
    val = i;
}

For some reason this is a lot faster than the old syntax - it is still slower than the fastest integer loop, but this shouldn’t affect the performance very much. Better read the manual next time ;-)
I also have updated the performance table in the previous post.