Storing and reevaluating point positions

[RudyardKipling]

Hello good people,

Let's say I have a particle simulation, I would like to store the position of every point at the starting frame and then later on, say frame 25, I'd like to reevaluate each point position. If the new number is different than that on frame one, ie the particle moved, something happens to the particle, it stops, turns green, whatever.

Basically some kind of if statement, 

if newVal != oldVal:

     turn green

Any help is welcome!

 

[tamagochy]

Freeze frame and use point wrangle with first input actual points second - freeze one.

int pt = findattribval(1, 'point', 'id', @id);
vector pos = point(1,'P',pt);
if(@P!=pos)
 do what you need

your points should have id attribute

[RudyardKipling]

Ah, brilliant, it worked like a charm!