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Simple Rotation Controls Opacity Expression?
wheel = comp("Screen").layer("PARENT").transform.rotation; //this is the layer for rotation// if(304 < wheel < 18) {value=100} else{value=0};I really don’t know much coding, but I have a request for you experts.
I am trying to have the rotation of a layer control the opacity of another layer, but only between certain values.
Example:
I want (layer) to be 100% opacity between the values of 304 and 20 (in rotation value of layer 2). Everywhere else, the opacity = 0.
This is what I have but it doesnt work at all lol. Please help!!
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3 Replies
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try this out
wheel = thisComp.layer(“rotation layer”).transform.rotation;
if(wheel>20&&wheel<304){
100
}else{
0
} -
Thank you so much. I haven’t slept for like 2 days working on this haha.. I totally forgot about the && and || for if/else expressions!
Much Obliged.
Any chance you or someone might know how to make any rotation that goes past 360 NOT wrap around – for sack of that expression not working for any value 1x + 00 for rotation.
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if you want to constrain between 0 and 360, try:
wheel = thisComp.layer("rotation layer").transform.rotation;
wheel=clamp(wheel,0,360);
If you want true wrapping around (365° => 5° and -5° => 355°)
wheel = thisComp.layer("rotation layer").transform.rotation;if (wheel >0) {
wheel=wheel%360;
} else {
wheel = 360 + (wheel%-360);
}
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