[Julien Tourigny-Gagnon]

Hi! I’d like to be able to understand this expression a bit better. I think that i lack knowledge about the way After Effects evaluate expressions to be able to fully understand how this algorithm works.

Question 1 : How does AE evaluates the random functions in this case? To my knowledge, since seedRandom is used with timelesss = true, the values returned by the random() functions should always be the same.

Question 2 : Is t0 kept in memory somehow? From what i understand, t0 will be reset to 0 every frame before going through the while{} loop. (and will always end up being a bigger value than time at the end of the expression evaluation)

Question 3 : Now if i understand the rest of the expression, this will always push t0 ahead of the current time and i don’t understand how the final condition could be met (t > play) since t is most liekly always going to be a negative value.

Thanks to anyone who can help me understand this better. I really don’t like to use expressions if i don’t know how they work.