animating car wheels

[Pixelschubser]

Hello,
at the moment I model a car and later this should be animated. But I wonder how to animate a realistic rotating wheels while the car is moving forward/backward. Do anybody have a tut or idea how it works??

Thank you

Sorry for my bad english!

[septopus]

i think the docs has an example.
but you have to use scops to get proper rotation when the car moves.
you need to compute the distance traveled from one frame to the other, then pass that in a ( 2*PI*R )* 360 to get rotation value.
ill post a quick example shortly.

[Pixelschubser]

Thank you. I know the principle but I'm not able to realize it in SI. For an example i would be thankful.

[septopus]

a basic wheel, didnt test much
but i wrote some comments in the scop

[Pixelschubser]

Thank you But couldn find any commands after selecting the null object. I opend the Scripted Operated Editor but the command are missing. Sorry but I´m very new in scriping and animation. I never used it before. I would be thankful when you give me step-by-step instruction to display the commands.

Thank you

[septopus]

the script is on the local kine of the wheel, select the wheel to see it

[Pixelschubser]

juhu...i found it now.
but it is havy to understand this code for me! I never coded befor! But this is an another story!

Back to the tire...when I move this tire in z-axis it doesn´t rotate.

[septopus]

you dont move the tire itself, you move the car object [the null box] and the tire will rotate.