We were able to build a tracked vehicle out of the Chaos Controller, but the throttle simulates forward and reverse of the right or left track respectively. The actual wheels are invisible and we duplicate and move individual track plates on a spline to get a reasonable effect. The four wheels are set to turn 175 degree to turn without going forward (much, 180 created too much drag).
It’s not perfect but it does work well enough for our purposes. We found that on hills it drags slightly sideways but our tank battle area is relatively flat.
More direct answer is that the torque and throttle are what forces the turn in place due to the 4 wheel 175 degree steering. So we do have to add throttle to make it work.
Strange though. Yaw has no effect, from a dead stop, when trying to turn left. I can turn right just fine on all of my vehicles when sitting still, but turning left does not work unless I the vehicle is already moving…
I asked the modeler who finished up this class. His memory was that just hitting A or D would not spin in place. So he added a small amount of forward momentum to make it work. While you are moving forward or backward, it doesn’t have this problem.
He probably meant “add a tiny bit of throttle”. That jives with my memory that you have to use throttle all the time. That is one of the reasons it’s not ideal to use this if you want a serious tank. We only have two in the entire first installment of our games. One is a somewhat cinematic adventure and the other is a tracked APC player drives in rather restricted area we can control terrain. Neither will put it through its paces where an astute player might notice it’s not an actual tank controller. Indeed, I’ll be adding it to our Wheeled Vehicle custom class and the rest of the mechanics will be pure wheeled vehicle stuff. It’s an economy of development that justifies it for this use. Track code will be reusable later on a real tank controller.
I’m still trying to get him to copy the project we built it in over to me. I was hoping to post it as a snippet and put a video up when I get it. Making the track pieces work was trying so sharing it would be ideal. I’ll probably have it this evening, though not certain.
Here is the test model (all based on the Epic Sports car and just a mock-up to proof the Chaos WV acting with tracks). This has the idlers hooked up and responding to obstructions.