Bullet Units

[Granyte]

I was wondering how does the rigidbody linear velocity scale.

I mean how many bullet units per second or per ticks does that represent cause currently I have an issue balancing acceleration in my game because of this

[xexuxjy]

Gravity is set at 9.81 so the units are effectively meters even if it's not really mentioned as such.

[Granyte]

Ya but in the case of pure size units it's perfectly reasonable to assume meters. But other units can fit as long as they match what you need.

But when talking about acceleration or velocity the the result are in (Bullets unit of scale)/(Bullet unit of time)

but how much units of scale does a linear velocity of 0,0,1 get you acros in ? units of bullet time

[xexuxjy]

Ah sorry, ok.
It depends on what you're feeding into stepSimulation , which has defaults of 1/60th second for splitting simulations steps (btDynamicsWorld.h)

[Granyte]

so if I step my world in 1/60 of a second I should have a match of 1 units/1 second

[ratatouille]

Please see this thread for my simulation of a damped pendulum:

http://www.bulletphysics.org/Bullet/php ... =9&t=10184

Accuracy was very good in the end, with MKS units. However, world scaling is not yet working (e.g. simulating a very tiny pendulum), am about to launch another thread on that.