Question

What does the term “STEP” means in bullet physics?

What does the function stepSimulation() and its parameters mean?

I have read the documentation but i could not get hold of anything.

Any valid explanation would be of great help.

Answer 1

btDynamicsWorld::stepSimulation(
   btScalar timeStep,
   int maxSubSteps=1,
   btScalar fixedTimeStep=btScalar(1.)/btScalar(60.));

timeStep – time passed after last simulation.

Internally simulation is done for some internal constant steps. fixedTimeStep

fixedTimeStep ~~~ 0.01666666 = 1/60

if timeStep is 0.1 then it will include 6 (timeStep / fixedTimeStep) internal simulations.

To make glider movements BulletPhysics interpolate final step results according reminder after division (timeStep / fixedTimeStep)