/*
Replaces selected layers with randomly ordered selected footage from the project panel,
ensuring no two adjacent layers use the same footage.
*/
(function() {
var comp = app.project.activeItem;
if (!(comp && comp instanceof CompItem)) {
alert("Please select an active composition.");
return;
}
var selectedLayers = comp.selectedLayers;
if (selectedLayers.length === 0) {
alert("Please select at least one layer to replace.");
return;
}
var selectedItems = app.project.selection;
var footageItems = [];
for (var i = 0; i < selectedItems.length; i++) {
var item = selectedItems[i];
if (item instanceof FootageItem) {
footageItems.push(item);
}
}
if (footageItems.length === 0) {
alert("No footage items selected in the project panel.");
return;
}
app.beginUndoGroup("Replace Footage Randomly");
// Shuffle the footage items
function shuffleArray(array) {
for (var i = array.length - 1; i > 0; i--) {
var j = Math.floor(Math.random() * (i + 1));
var temp = array[i];
array[i] = array[j];
array[j] = temp;
}
}
var footageSequence = [];
while (footageSequence.length < selectedLayers.length) {
var shuffledFootage = footageItems.slice();
shuffleArray(shuffledFootage);
footageSequence = footageSequence.concat(shuffledFootage);
}
// Assign footage to layers
for (var j = 0; j < selectedLayers.length; j++) {
var layer = selectedLayers[j];
var currentFootage = footageSequence[j];
// Ensure no two adjacent layers have the same footage
if (j > 0 && currentFootage === footageSequence[j - 1]) {
// Swap with the next item if possible
if (j + 1 < footageSequence.length) {
var temp = footageSequence[j];
footageSequence[j] = footageSequence[j + 1];
footageSequence[j + 1] = temp;
currentFootage = footageSequence[j];
}
}
layer.replaceSource(currentFootage, false);
}
app.endUndoGroup();
})();
