using valueAtTime() on individual channels

[rawbee]

I'm just wondering why this works:

thisComp.layer("m").position.valueAtTime(time - .1)

but this doesn't:

[position[0], thisComp.layer("m").position[1].valueAtTime (time - 0.1)]

TIA!
Robby

[davestewart]

Hi Robby,

The problem arises because you are calling the valueAtTime method on a Number (position[1]), not a position Value (position):

Code: Select all

//bad
position[1].valueAtTime(time - 0.1)

//good
position.valueAtTime(time - 0.1)[1]

You may find it easier to understand things in future if you break your code up onto separate lines:

Code: Select all

x = position[0];
y = thisComp.layer("m").position.valueAtTime(time-0.1)[1];
[x,y] 

Cheers,
Dave

[rawbee]

Thanks for the tip! I'll try to break it up more often Your code clears up my problem perfectly!

[davestewart]

Hilarious. You make it sound like herpes or something!