时钟效果器 代码展示

为AE使用的脚本，用于模拟时钟的运动效果。

function SecondHandEffectScript() {
    var scriptWindow = new Window("palette", "时钟效果器1.1 作者 b站：吾秀的丫批", undefined, {resizeable: true});
    scriptWindow.orientation = "column";
    scriptWindow.alignChildren = ["fill", "fill"];

    scriptWindow.layerText = scriptWindow.add("statictext", undefined, "已选择的图层：无");
    scriptWindow.selectButton = scriptWindow.add("button", undefined, "选择图层");
    var selectedLayer = null;

    scriptWindow.grp = scriptWindow.add("group");
    scriptWindow.grp.orientation = "row";

    scriptWindow.grp.add("statictext", undefined, "每秒刷新次数：");
    var ticksField = scriptWindow.grp.add("edittext", undefined, "1");
    ticksField.characters = 4;
    scriptWindow.grp.add("statictext", undefined, "每次移动角度：");
    var degreesField = scriptWindow.grp.add("edittext", undefined, "6");
    degreesField.characters = 4;

    scriptWindow.predefinedType = scriptWindow.add("dropdownlist", undefined, ["自定义", "秒针", "分针", "时针"]);
    scriptWindow.predefinedType.selection = 0;
    scriptWindow.refreshController = scriptWindow.add("checkbox", undefined, "启用刷新控制（不启用则进行平滑运动）");

    var applyButton = scriptWindow.add("button", undefined, "应用效果");

    scriptWindow.selectButton.onClick = function () {
        var comp = app.project.activeItem;
        if (comp && comp instanceof CompItem && comp.selectedLayers.length == 1) {
            selectedLayer = comp.selectedLayers[0];
            scriptWindow.layerText.text = "已选择的图层：" + selectedLayer.name;
        } else {
            alert("请在当前合成中选择一个图层。");
        }
    };

    scriptWindow.predefinedType.onChange = function () {
        var preset = scriptWindow.predefinedType.selection.index;
        switch (preset) {
            case 1:
                // 秒针预设
                ticksField.text = "1";
                degreesField.text = "6";
                break;
            case 2:
                // 分针预设
                ticksField.text = "1";
                degreesField.text = "1/10";
                break;
            case 3:
                // 时针预设
                ticksField.text = "1";
                degreesField.text = "1/120";
                break;
        }
    };

    applyButton.onClick = function () {
        if (selectedLayer === null) {
            alert("请先选择一个图层。");
            return;
        }
        app.beginUndoGroup("应用时钟效果");
        var effectExpression = "ticksPerSecond = " + ticksField.text + ";\n" +
                               "degreesPerTick = " + degreesField.text + ";\n" +
                               "frameRate = 1 / thisComp.frameDuration;\n" +
                               "ticks = Math.floor(time * frameRate);\n" +
                               "ticksPerFrame = frameRate / ticksPerSecond;\n";

        if (scriptWindow.refreshController.value) {
            effectExpression += "Math.floor(ticks / ticksPerFrame) * degreesPerTick;";
        } else {
            effectExpression += "time * degreesPerTick * ticksPerSecond;";
        }

        selectedLayer.property("ADBE Transform Group").property("ADBE Rotate Z").expression = effectExpression;
        app.endUndoGroup();
        alert("已将时钟效果应用于图层：" + selectedLayer.name);
    };

    scriptWindow.layout.layout(true);
    scriptWindow.layout.resize();
    scriptWindow.onResizing = scriptWindow.onResize = function () {
        this.layout.resize();
    };

    scriptWindow.center();
    scriptWindow.show();
}

if (parseFloat(app.version) < 14) {
    alert("该脚本需要 Adobe After Effects CC 2017 或更高版本。");
} else {
    SecondHandEffectScript();
}