I apply time_step inside c_move function. But do I need to apply time_step into physic function (eg. phent_addtorqueglobal)? Or physic control time_step itself?

What I notice, my ball movement (using physic) is much faster on slower machine. And my ball seems heavier on faster machine. Its reverse to c_move. c_move become slower on slower machine.

You must not use time_step with physics engine forces.

Then what do you think happening to my ball? It moves lighter and faster on slower machine. I have another object that I move using c_move and that object speed is maintain between fast/slow machine. But just for the ball, its different. How to control the ball movement? Should I lock the FPS? I hope not.

I don´t know what happens to your ball. Can you show your code? Maybe you apply the force for one frame only?

Thx for your fast reply. So you are confident that the physic maintain its speed on different machine? Then I'll check my code. Must have some mistake. Or I maybe because I didnt close several application (photoshop, irc, flash) while running the code...

P/S: My code is too messy. I cant imagine how to cut and paste the code here. :p