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Opacity triggered by layer’s name
Hello!
Id’like to show a particular element in a composition when one of the layer’s name contains a specific name.
The following code is doing the job, but can you show me a way to shorten and simplify it please?
In the composition when the number of existing layers is lower than the number of “CnameX” defined in the code, it shows this error: “Error: Layer 30 index out of range”.
Id’like to reuse this expression for various compositions.
I guess the code would include “thisComp.numLayers”.
Thank you for your help
in opacity expression:
a=0;
b=3;
nam = “3 4”
Cname1 = thisComp.layer(1).name.substr(a,b)
Cname2 = thisComp.layer(2).name.substr(a,b)
Cname3 = thisComp.layer(3).name.substr(a,b)
Cname4 = thisComp.layer(4).name.substr(a,b)
Cname5 = thisComp.layer(5).name.substr(a,b)
Cname6 = thisComp.layer(6).name.substr(a,b)
Cname7 = thisComp.layer(7).name.substr(a,b)
Cname8 = thisComp.layer(8).name.substr(a,b)
Cname9 = thisComp.layer(9).name.substr(a,b)
Cname10 = thisComp.layer(10).name.substr(a,b)
Cname11 = thisComp.layer(11).name.substr(a,b)
Cname12 = thisComp.layer(12).name.substr(a,b)
Cname13 = thisComp.layer(13).name.substr(a,b)
Cname14 = thisComp.layer(14).name.substr(a,b)
Cname15 = thisComp.layer(15).name.substr(a,b)
Cname16 = thisComp.layer(16).name.substr(a,b)
Cname17 = thisComp.layer(17).name.substr(a,b)
Cname18 = thisComp.layer(18).name.substr(a,b)
Cname19 = thisComp.layer(19).name.substr(a,b)
Cname20 = thisComp.layer(20).name.substr(a,b)
Cname21 = thisComp.layer(21).name.substr(a,b)
Cname22 = thisComp.layer(22).name.substr(a,b)
Cname23 = thisComp.layer(23).name.substr(a,b)
Cname24 = thisComp.layer(24).name.substr(a,b)
Cname25 = thisComp.layer(25).name.substr(a,b)
Cname26 = thisComp.layer(26).name.substr(a,b)
Cname27 = thisComp.layer(27).name.substr(a,b)
Cname28 = thisComp.layer(28).name.substr(a,b)
Cname29 = thisComp.layer(29).name.substr(a,b)
Cname30 = thisComp.layer(30).name.substr(a,b)
Cname31 = thisComp.layer(31).name.substr(a,b)
if (Cname1 == nam) {100}
else if (Cname2 == nam) {100}
else if (Cname3 == nam) {100}
else if (Cname4 == nam) {100}
else if (Cname5 == nam) {100}
else if (Cname6 == nam) {100}
else if (Cname7 == nam) {100}
else if (Cname8 == nam) {100}
else if (Cname9 == nam) {100}
else if (Cname10 == nam) {100}
else if (Cname11 == nam) {100}
else if (Cname12 == nam) {100}
else if (Cname13 == nam) {100}
else if (Cname14 == nam) {100}
else if (Cname15 == nam) {100}
else if (Cname16 == nam) {100}
else if (Cname17 == nam) {100}
else if (Cname18 == nam) {100}
else if (Cname19 == nam) {100}
else if (Cname20 == nam) {100}
else if (Cname21 == nam) {100}
else if (Cname22 == nam) {100}
else if (Cname23 == nam) {100}
else if (Cname24 == nam) {100}
else if (Cname25 == nam) {100}
else if (Cname26 == nam) {100}
else if (Cname27 == nam) {100}
else if (Cname28 == nam) {100}
else if (Cname29 == nam) {100}
else if (Cname30 == nam) {100}
else if (Cname31 == nam) {100}
else {0}
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5 Replies
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Hard to confirm without seeing your full project, but I think this does what you’re after:
a=0;
b=3;
nam = "3 4";
var CnameArray = [];
var opac = 0;
for (var i = 0, i < 31, i++) {
CnameArray[i] = thisComp.layer(i).name.substr(a,b);
if (CnameArray[i] == nam) {
opac = 100;
}
}
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I think I’d set it up like this:
a = 0;
b = 3;
n = "3 4";
val = 0;
for (i = 1; i <= thisComp.numLayers; i++){
if (thisComp.layer(i).name.substr(a,b) == n){
val = 100;
break;
}
}
val -
Thank you for your quick response Graham,
It shows an error: Syntax error: Unexpected token ‘<‘
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Thank you Dan it works!
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Thank you for solving this, Dan!
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