Opacity change at markers

[Filip Vandueren]

Well, you can only have 10 comp-markers…

here’s the expresso for layermarkers (apply to opacity):


if (marker.numKeys) {
// what's the nearest marker ?
nearest_marker=marker.nearestKey(time)

// if the nearestKey lies in the future,
// subtract 1 to get the index of the 'current' key

current_marker_index = 1 + nearest_marker.index - (nearest_marker.time > time);

// convert our running marker index to
(current_marker_index%2)*100

} else {
// degrade nicely if there are no markers:
value;
}


[Alex Dinnin]

Thanks for replying

I have applied this to the opacity.. and it doesn’t seem to do anything ??

is this for cs3 or can it be applied over all versions ?

Alex

[Filip Vandueren]

I only have CS3 installed right now.

There were some bugs in the marker expressions for the previous versions of AE, but I believe they only had to do with not being able to access the name/text of a marker.

Let’s debug:
First of all: the expression looks to markers on it’s own layer.

Try this on a layer without markers:

if (thisLayer.marker.numKeys>0) {
50;
} else {
0;
}


Is your layer at 100, 50 or 0 % ? -> it should be 0%

Add a marker, -> it should be 50%

If that worked, then try changing the first line of the previous expressions to:

if (thisLayer.marker.numKeys>0)

that might help.