Pi ? simple Q . stuck

Maya
1

I do not have a book in the site and I need the Formula For rotation from translation . so if anyone got a learnning Maya or just know What is that Formula please help. thanks
yury

2

Duh, now this is pretty basic... in fact its 6th grade math.

A cricle rolls one revolution (360 dgrees) for each cicumference traveled. circumference = 2*Pi*Radius (or Diameter*Pi).

3

do not be a jerk.
and then you did not answer the Question. I know what Pi is and I know it's dumb i cannot derive the Aquation I need for the Rotation Expression.
so can you tell me what would be the Formula to make a Cylinder rotate on Z as it translates on X.

cylinder.rz = (WHAT?????)

thanks .

4

So do you mean you want it to rotate while the object is traveling in X...? if so you can just do this
object.rz = object.tx.....this would make the object rotate one degree for every unit in x it moves, and if that is to little of rotation just multiply the right side with 10 or 20 or however much you want the object to rotate per every unit in x like this
object.rz = object.tx *25;
and if you want the rotation to be in the opposite direction make your multiplier a negative value......Maybe this is the answer you were looking for?

5

well that's a one way to do it but to get an exact rotation , so it sticks to the ground Perfectly one should use the the Aquasion with Pi in it, it was discussed in the Learnning Maya Book . I do not have this book around here so if someone have it , please look it up in one of Expressions Tutorials there. its a simple Formula I can not remember
thanks

6

thanks anyway

if anyone is interested:

rotation = - ( translation * ( 360 / ( Diameter * Pi ))) ;

maybe ..... ?