Forum - Craft Animations - 3d animation tools

Hi there!
I'm trying to rig a tank (M1 Abrams), I do it exactly in your help documentations (I do it in three times) but it's not correctly . When I create a track it's not touch the ground. Like this
Can you help me fix this error
My english very bad, sorry about that. Thanks alot.

The track is in place, and the reason is I put the CrawlerTrackBogie in wrong place.

j.lennon,

Are you sure you created the wheels in the right direction? There is an arrow on the driveWheel indicating which direction you should position the wheels. By looking at your picture, the 2nd wheel should be positioned where the "blue" one is, then the 3rd wheel to the left of it and so on...

Here's a picture from the help documentation:

Thanks Carl ! The track is in correct place. But I have one more question. I want to make M1Abrams jumping over a slope and I create a 4WheelExt intead of CrawlerExt .
So 4wheelExt will control the moving of the tank, and in the menu configure I check enable jumping. The tank jumping but all track go crazy, it fly up and down...very confuse. In this case I set the Gas pedal = 10, when I change Gas Pedal =1 the track rolling very nice but the tank not jump anyway. How can I set a hight speed(Gas Pedal=10) of the tank and the track must rolling nice.
I'm a vietnamese ...sorry about my english, hope you understand. Thanks alot!

j.lennon wrote:Thanks Carl ! The track is in correct place. But I have one more question. I want to make M1Abrams jumping over a slope and I create a 4WheelExt intead of CrawlerExt .
So 4wheelExt will control the moving of the tank, and in the menu configure I check enable jumping. The tank jumping but all track go crazy, it fly up and down...very confuse. In this case I set the Gas pedal = 10, when I change Gas Pedal =1 the track rolling very nice but the tank not jump anyway. How can I set a hight speed(Gas Pedal=10) of the tank and the track must rolling nice.
I'm a vietnamese ...sorry about my english, hope you understand. Thanks alot!

High speeds, jumping... You're really pushing Craft CrawlerTracks to the limit. Increasing the FPS will increase the accuracy of the tool but with Craft CrawlerTracks you need to be really careful when you increase it because it will get too stiff if you go too high.

(picture from 3ds MAX)

I doubt you can get it stable if you're going really fast but you can always try.
I'd ask Henrik Hansson (the creator of Craft CrawlerTracks) for tips but unfortunately he's out of the office.

Hi Carl !
I increased PFS like the way you do, but the tracks still confuse.
This is how I use 4WheelExt and set up the tracks


And when the tank jumping, the tracks look like this


This is video about my trouble
http://www.youtube.com/watch?v=E9a8eUqZXLA

How can I make these tracks crawling nice. Thanks you a lot, Carl !

What you could do is create a bunch of support wheels above the track to block it from going too high. But at the speeds you're going I doubt you can keep if from odd behavior; the speed is just too fast.

I would suggest you first record everything but the tracks (there is a slight bug we are fixing with delays in hierarchies).
Next you uncheck everything and only check the tracks and hit resimulate.
Next, since this is physics, you need to tweak the flaccidity parameter to get it right.
Carl's suggestion on the extra support wheels is also a good idea in some cases.

//Luigi TA

Carl, Luigi !!!
You are so great ! Thank you so much. My tracks work now. It's still confuse but just a little, I hit auto key and fix it. It look good now. Great !!!
Thanks you again