Spawn vehicles via rpc

[KerryMoffittRtn]

No description provided.

[hos-b]

@KerryMoffittRtn Hi. Since apparently this PR is not getting merged, could you help me with my problem ?
I'm trying to add some cars on the fly but I get the following error :
rpclib: function 'enableApiControl' (called with 2 arg(s)) threw an exception. The exception contained this information: Vehicle API for 'agent-0' is not available. This could either because this is simulation-only API or this vehicle does not exist.
If I don't use enableApiControl, I won't get an error but it also won't spawn anything. I get the same error when I run HelloSpawnedDrones.

Thanks

[jinkman]

client.simAddVehicle("My", "simpleflight", "", 0, 0, 0);
client.enableApiControl(true, "My");
client.armDisarm(true, "My");
client.takeoffAsync(1.0, "My")->waitOnLastTask();
client.moveToPositionAsync(10, 10, -10, 10, 10, DrivetrainType::ForwardOnly, YawMode(false, 0.0), -1.0, 1.0, "My")->waitOnLastTask();
Don't know why these commands go wrong

[jinkman]

The error message looks like this：
LogTemp: Error: Exception occurred while updating world: PositionController does not support yaw axis i.e. 3
LogTemp: Error: Exception occurred while updating world: reset() must be called first before update()
LogTemp: Error: Exception occurred while updating world: reset() must be called first before update()
LogTemp: Error: Exception occurred while updating world: reset() must be called first before update()

[rajat2004]

@KerryMoffittRtn Thanks for this! It's a very interesting PR, I've opened a new PR #2390 which is rebased on master, will be adding some more things on that

[madratman]

Closing this in favor of #2390
I am slightly wary of this feature, and I am not sure how many people actually want it.
Spawning pure physics bodies at run time could be interesting in case of RL algorithms in the context of (dynamic) obstacle avoidance (a la papers throwing objects at robots learning to walk in sim.).