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November 30, 2022
Question
After Effects Extend Script for Expressions Question
- November 30, 2022
- 1 reply
- 488 views
I am making an expression injector that has a drop down menu for the expressions and transform properties. The UI works but the button click doesn't work. What am I doing wrong?
// AEEXPRESSIONPANEL
// =================
var expressionsArray = [];
var expressionObj = {
"Auto Fade": "transition = 20;if (marker.numKeys<2){tSecs = transition / ( 1 / thisComp.frameDuration);linear(time, inPoint, inPoint + tSecs, 0, 100) - linear(time, outPoint - tSecs, outPoint, 0, 100)}else{linear(time, inPoint, marker.key(1).time, 0, 100) - linear(time, marker.key(2).time, outPoint, 0, 100)};",
"Inertial Bounce": "amp = .1; freq = 2.0; decay = 2.0; n = 0; time_max = 4; if (numKeys > 0){n = nearestKey(time).index;if (key(n).time > time){n--;}}if (n == 0){ t = 0;}else{t = time - key(n).time;}if (n > 0 && t < time_max){v = velocityAtTime(key(n).time - thisComp.frameDuration/10);value + v*amp*Math.sin(freq*t*2*Math.PI)/Math.exp(decay*t);}else{value}",
"Random Blinking": "blinkRate=.1*gaussRandom(2)n=Math.sin(time*blinkRate);if(n<0) 0;else 100;",
"Sine Wave": "Math.sin(time*2*Math.PI*1/3)*500;",
};
var AEEXPRESSIONPANEL = new Window("palette", undefined, undefined, {maximizeButton: true, minimizeButton: true});
AEEXPRESSIONPANEL.text = "AE EXPRESSIONS";
AEEXPRESSIONPANEL.preferredSize.width = 200;
AEEXPRESSIONPANEL.preferredSize.height = 75;
AEEXPRESSIONPANEL.orientation = "column";
AEEXPRESSIONPANEL.alignChildren = ["center","center"];
AEEXPRESSIONPANEL.spacing = 10;
AEEXPRESSIONPANEL.margins = 16;
// GROUP1
// ======
var group1 = AEEXPRESSIONPANEL.add("group", undefined, {name: "group1"});
group1.orientation = "row";
group1.alignChildren = ["left","center"];
group1.spacing = 10;
group1.margins = 0;
var dropdown1_array = ["Position","-","Scale","-","Rotation","-","Opacity"];
var dropdown1 = group1.add("dropdownlist", undefined, undefined, {name: "dropdown1", items: dropdown1_array});
dropdown1.selection = 0;
dropdown1.alignment = ["left","center"];
var dropdown2_array = group1.add("dropdownlist", undefined, expressionsArray);
dropdown2_array.selection = 0;
dropdown2_array.size = [220, 25];
var displayText = group1.add("statictext", undefined, expressionObj[expressionsArray[0]], {multiline: true});
displayText.size = [300, 100];
var applyButton = group1.add("button", undefined, undefined, {name: "button1"});
applyButton.text = "Apply";
AEEXPRESSIONPANEL.show();
dropdown2_array.onChange = function() {
displayText.text = expressionObj[expressionsArray[dropdown2_array.selection.index]];
}
var newName;
applyButton.onClick = function() {
if(app.project.activeItem.selectedLayers.length < 1) {
alert("Please select a layer to apply expressions to", "");
return false;
}
else {
app.beginUndoGroup("Expression Injection");
injectExpression(app.project.activeItem.selectedLayers);
app.endUndoGroup();
}
for(var q = 0; q < app.project.activeItem.selectedLayers[0].selectedProperties.length; q++) {
app.project.activeItem.selectedLayers[0].selectedProperties[q].expression = expressionObj[dropdown2_array.selection.index];
}
}
function injectExpression(layerArray) {
for(var i = 0; i < layerArray.length; i++) {
layerArray[i].property(getPropertyName1()).expression = expressionList;
}
alert("Expressions applied successfully!", "");
}
function expressionList() {
switch(dropdown2.selection.index) {
case 0:
return "Auto Fade";
break;
case 1:
return "Inertial Bounce";
break;
case 2:
return "Random Blinking";
break;
case 3:
return "Sine Wave";
break;
}
}
function getPropertyName1() {
switch(dropdown1.selection.index) {
case 0:
return "Position";
break;
case 1:
return "Scale";
break;
case 2:
return "Rotation";
break;
case 3:
return "Opacity";
break;
}
}
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