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Expression Help for Learner
temp = transform.position[1];
[temp, temp;]thisComp.layer(“Particle layer”).effect(“Particular”)(“Size”)I’m trying to have a null, y position control the size of the particles but AE gives me an error, I’m
thinking it’s because I have to fill in the array {temp, temp} ? Also what would I need to add to that
expression, so when the particles fade off, the colors from a colorama effect on another layer change
color, but I can easily change the color to whatever I want ? I’m in the mist of learning expression
in AE as well, quite interesting 🙂
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6 Replies
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To control the particle size by the y coordiante of a null, you would need to apply an expression like this to the particle size property:
thisComp.layer(“Null 1”).transform.position[1]
Dan
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TrapCode Particular doesn’t allow expressions on it’s settings
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I’m having a hard time figuring out how you came to that conclusion. I just tried it and it works fine for me.
Dan
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There is no stop watch on the Aux -> Particle Size within Trap code and it doesn’t allow me to add an expression ?
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Ah, I thought you were trying to animate the Particle Size property rather than Aux Particle Size. Sorry, there’s no way for an expression to control a property that doesn’t have a stopwatch.
Dan
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I’ll just have to keyframe the size.
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