Expression every 3 frames??

[afx]

How would I get an expression to evaluate every 3 frames??

Probably an easy answer, but i must overlooking something in exhelp.

[anamous]

depends. which context, POPs, SOPs, ..? if your expression is frame-dependent (meaning that it uses the $F variable), it's pretty easy using the modulo operator. Just use ($F - $F%3) instead of $F. this will make $F increment in steps of 3 frames instead of every frame (0 0 3 3 3 6 6 6 9 9 9 etc.). If you need it to increment by 1 every 3 frames, use (($F - $F%3) / 3) instead of $F - the resulting sequence will be (0 0 1 1 1 2 2 2 3 3 3 etc.).

cheers,

Abdelkareem

[afx]

Dude awesome thanks, that worked perfectly.

I was going about it all the wrong way.

I created a attribute create with a module in the first variable and then inputed that into an if() and was going by it that way.

Now what is the difference between $FF and $F? That might of been my issue also.

Edited March 10, 2009 by Angelo

[anamous]

$F is the current frame number as an integer (1 2 3 etc.), whereas $FF is the current frame as a float. $FF is important for certain effects (think particles or DOPs), and for correct motion blur and time shifting/stretching for example.

cheers,

Abdelkareem

[ykcosmo]

$F%3 == 0

or use : if($F%3==0, stateA,stateB)

have fun:)

Edited March 11, 2009 by ykcosmo