How to call my physics simulation timestep function?

[johannesMi]

Hello,

currently I'm working on embedding the rigid-body physics engine ODE and OpenGl3 into Qt.

I want my object hierarchy to look like the following
QApplication
-GLWidget (draw scene, user input)
-ODEengine (start/stop, timestep)
-Scene
--Box Object
--Sphere Object

I am not sure how to call the timestep function of the engine. I am aiming for 100 FPS refresh rate and a timestep size of 0.01, so there is roughly on physic step in each frame.

Should I implement it with 2 independent timers, one for GL-Rendering and the other for the Physics?
Is there any standard approach for this?

I am looking forward for your answers.

Johannes