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Re: After Effects Expressions;Chapter 3, Comp 16
So as to not have to come here for help quite so often, I’ve been working my way though Marcus Geduld’s book. I’ve gotten to this particular composition, which he has the expression not enbabled in the downloadable projects, when you enable the expression I get the folowing error:
Bad method arguements: propertyIndex can’t be used on this Property.
Instead of the expression he used, I recreated it, using a pickwhip instead of the .param(propertyIndex-2). I was wondering if it’s possible to do the way Marcus suggests in the book.
Johnny Cuevas, Editor
http://www.thinkck.com -
4 Replies
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Sorry, I tried to upload a screen shot of the effect and expressions, but didn’t work.
Expression that works:
4 color gradientPoint2: effect(“4-Color Gradient”)(“Point 1”).valueAtTime(time – .5)
Does not work:
Point 2: effect(“4-Color Gradient”).param(propertyIndex – 2).valueAtTime(time – .5)Johnny Cuevas, Editor
http://www.thinkck.com -
Try it this way:
effect(“4-Color Gradient”).param(thisProperty.propertyIndex – 2).valueAtTime(time – .5)
Dab
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Thank you Dan, works now.
Since I saw that Marcus mentioning you in his book I just wanted to take the time to thank both you and Marcus for the incredible resource that is “After Effects Expressions”. I’ve been using AE since COSA made it, but have never used any expressions besides the pickwhip since they were introduced.
I’m now reading it for the second time and I’m really starting to understand this powerful tool in AE(even managed to write a few expressions on my own—that worked!).
Just wanted to know how grateful I am to Marcus for writing this book(and your contributions as well).
Thanks again,
Johnny Cuevas, Editor
http://www.thinkck.com -
Ran into same problem. Glad I was able to find solution here.
Thanks Dan!
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