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remembering javascript values in AE7
I would like to keep an old zRotation value on a wheel (for instance) and compare it to the current zRotation on the wheel. I can then construct an expression to tell me how much vector blur to apply to the wheel while its rotating. In regular javascript I would use a class variable for remembering old values. Is there a construct in AE 7 for doing this.
TONY T
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3 Replies
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There’s no construct for saving old values, but you can retrieve old values using valueAtTime(). For example:
thisComp.layer(“wheel”).transform.zRotation.valueAtTime(time – 2.0); // value from 2 seconds ago
Dan
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Thanks, this should work as well
TONY T
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If you need to store values temporaily, you can also use either expression controls or text layers. The disadvantage in the latter case is of course that you always have a lot of excess baggage for converting variables to strings and back.
Mylenium
[Pour Myl
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