I was trying to get a realistic tank/crawler type vehicle done with Bullet. However, I failed with normal movements by forces/torque. The crawler was sliding and moving unrealistic.
So I tried with the vehicle physics, my idea was to use e.g. 6 (invisible) wheels and to drive them. However, I discovered to my surprise, that it seems you can only give force to the chassie and the wheels will follow and rotate accordingly. They way vice versa seems much more logical to me (meaning to have "motors/engines" for each wheel, and let the chassie follow (I think thats the way ODE handles this?)).
So now my Qs:
- does anyone have an idea how to make a realistic tank movement?
Basicalty there are two types of vehicle simulation in Bullet: raycast wheeled vehicles and constraint hinge wheeled vehicles.
Have you looked into hinged wheel vehicle Blender demo? That is the closest to what you want: you can apply torque to the wheels, and that drives the chassis. However, it doesn't have suspension at the moment.
It requires some extra work to get such simulation working properly. It is on my list to make a sample for this in Bullet, for a Fork Lift.
Thanks,
Erwin
calli wrote:Hi,
I was trying to get a realistic tank/crawler type vehicle done with Bullet. However, I failed with normal movements by forces/torque. The crawler was sliding and moving unrealistic.
So I tried with the vehicle physics, my idea was to use e.g. 6 (invisible) wheels and to drive them. However, I discovered to my surprise, that it seems you can only give force to the chassie and the wheels will follow and rotate accordingly. They way vice versa seems much more logical to me (meaning to have "motors/engines" for each wheel, and let the chassie follow (I think thats the way ODE handles this?)).
So now my Qs:
- does anyone have an idea how to make a realistic tank movement?
Erwin Coumans wrote:
Have you looked into hinged wheel vehicle Blender demo? That is the closest to what you want: you can apply torque to the wheels, and that drives the chassis. However, it doesn't have suspension at the moment.
Ah, really.... I missed that hinged wheel demo!
I now have some nice crawler movement on a plane, however, without suspension its hard to drive on uneven terrain...
It would also be nice to have some friction on the hinges.
Hi, I'm just getting into this blender physics thing.
The problem I would like to model uses a bucket to transport grain particles. Hence I was thinking your dozer was a close approximation. Is there any chance I could have a look at your model/file??
If you're building a product then no problems, I'll keep trying other sample files.
with normal movements by forces/torque. The crawler was sliding and moving unrealistic.
