Hello all,

Im new to Houdini and I am running into some doing a small collision using BULLET within RDB Objects.

I have 2 cars both have animation on them. I made them both rigid body. I want to use my obj animation then at frame 16 switch into Rigid body for a collision. Im using a RDBkeyactive on both cars, copying over obj path info and using a variable to connect with the frame I want to switch over with (CRASH or CRASHCOW (Fr15) I created a second one just testing, no luck though…. I hope that makes sense :?

After all that the cars do not move at all, is there something Im doing wrong or missing?

I have added my script and obj's, I'm using latest build of houdini apprentice. (obj are on a dropbox here)

https://www.dropbox.com/sh/bbtlsyn1tew4wvs/xNfWyLCKat [dropbox.com]

If I can trouble someone to have a look into my script and see whats happening that would be greatly appreciated. Or even suggest possibly another way to achieve a simple car collision?

Thank you greatly in advanced I'm loving houdini!

figured out my problem

$SF >- $CRASH (no good)

$SF >= $CRASH (good)

aahh expressions