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Chipmunk Physics • View topic - Disabling momentum so that a body stops instantaneously

Disabling momentum so that a body stops instantaneously

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Disabling momentum so that a body stops instantaneously

Postby confused_chipmunk » Fri Jun 19, 2015 8:57 am

Hi everyone,

I'm working with a robot simulator called ARGoS , which uses Chipmunk2D Physics. Given a two-wheeled robot, I can set the velocities of each wheel, and the simulator will calculate the linear and angular velocities of the body that represents the robot.

If a robot is moving in a straight line at a constant speed, and I suddenly set the wheel speeds to zero, the robot does not come to an immediate stop. It takes one or two updates of the physics engine for the robot to come to a complete stop, because the body has inertia.

Is there any way to disable the momentum of a body, such that it has no inertia and therefore stops instantaneously?

Thanks!
confused_chipmunk
 
Posts: 2
Joined: Fri Jun 19, 2015 8:40 am

Re: Disabling momentum so that a body stops instantaneously

Postby zhanqixuan » Mon Jan 04, 2016 2:29 am

hey,man, I want to know this too.do u fix it?
zhanqixuan
 
Posts: 2
Joined: Mon Jan 04, 2016 2:15 am

Re: Disabling momentum so that a body stops instantaneously

Postby confused_chipmunk » Fri May 06, 2016 5:27 pm

No, sorry. I still have no idea whether this is even possible.
confused_chipmunk
 
Posts: 2
Joined: Fri Jun 19, 2015 8:40 am

Re: Disabling momentum so that a body stops instantaneously

Postby DrLeopoldStrabismus » Wed Aug 10, 2016 12:23 pm

I'm also working on Argos :)

What happens if you make a custom dynamics2d_footbot_model, but modify this line in the constructor:

m_fMass(1.6f)

to

m_fMass(0.0f)

Curious if this will give you any divide-by-0 errors.
DrLeopoldStrabismus
 
Posts: 2
Joined: Wed Aug 10, 2016 12:20 pm



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