As a complete newbie on after effects expressions, I could need some help on expressions:
I have a timeline with a lot of layers that are switched on or off by a lot of hold keyframes.
A Null object with 30 checkboxes is the controller for the triggered layers.
This is the Expression i used for on / off:
if(thisComp.layer("LAser On Off programmieren").effect("Laser 6.4")("Checkbox") == 0) Opacity = 0
if(thisComp.layer("LAser On Off programmieren").effect("Laser 6.4")("Checkbox") == 1) Opacity = 100
Now I want to add a slider to this null where i can set a global fade in and fade out value. (Needs to be two different values for in and out)
The idea is: if checkbox (hold frame)is set to off, fade out during X Frames. If opacity is 0, do nothing.
I found a lot of fade expressions that are linked to the in and out point of a layer. But can't get it to work with the holdframes due to my lack of expression-knowledge and understanding.
Does someone has a hint where i can start solving this task
Thank you, dirk