每次单击按钮时如何才能使时间轴更快？ [英] How can I make my timeline faster everytime I click a button?

问题描述

目前在JavaFX中遇到问题，尝试创建一个cookie Clicker游戏，所以我创建了一个Clicker按钮，每隔5秒就会自动点击一次cookie。我试图让我的时间轴每次购买另一个点击器时快0.1秒，目前，我一直在尝试这样：

currently stuck with a problem in JavaFX, trying to create a cookie clicker game, so i've created a button "Clicker" which automatically, once every 5 seconds, clicks the cookie. Im trying to make my timeline 0.1 seconds faster everytime i buy another clicker, currently, i've been trying it like this:

        private double clickerSpeed = 5.1;

        Timeline clickerPoints = new Timeline();
        KeyFrame kfClicker = new KeyFrame(Duration.seconds(clickerSpeed), 
        event -> {
             cookieClicker.cookies += cookieClicker.cursor.getProdRate();
             cookieButton.setText("Cookies = " + cookieClicker.cookies);
        });
        clickerPoints.getKeyFrames().add(kfClicker);
        clickerPoints.setCycleCount(Timeline.INDEFINITE);


        buyClicker.setOnAction(event -> {
            if (clickerSpeed >= 1 && cookieClicker.cookies >= 
            cookieClicker.clicker.getCosts()) {
            clickerSpeed -= 0.1; ## In theory, this should make the keyframe faster?
            }
        cookieClicker.buyClicker();
        clickerLabel.setText(cookieClicker.clicker.getName() + "s: " + 
        cookieClicker.clicker.getLevel());
        buyClicker.setText("Buy clicker for: " + 
        cookieClicker.clicker.getCosts());
        cookieButton.setText("Cookies = " + cookieClicker.cookies);
        clickerPoints.play();

推荐答案

修改原语 double 对之前读取的值没有任何影响;持续时间为不自动调整。

Modifying a primitive double does not have any effect on values read before; the duration is not automatically adjusted.

要加快时间轴，你应该修改费率属性。

To speed up the Timeline you should modify the rate property instead.

以下示例显示如何更新动画所需的持续时间，以便将矩形的淡入淡出从10秒减少到1秒1秒步骤：

The following example shows how to update the duration an animation takes to animate fading a Rectangle from 10 seconds to 1 second in 1 second steps:

@Override
public void start(Stage primaryStage) throws Exception {
    Rectangle rect = new Rectangle(100, 100);
    Button btn = new Button("Speed Up");
    HBox root = new HBox(rect, btn);
    Timeline timeline = new Timeline(
            new KeyFrame(Duration.ZERO, new KeyValue(rect.opacityProperty(), 1d)),
            new KeyFrame(Duration.seconds(10), new KeyValue(rect.opacityProperty(), 0d))
    );
    timeline.setCycleCount(Animation.INDEFINITE);
    timeline.play();

    btn.setOnAction(new EventHandler<ActionEvent>() {

        private double duration = timeline.getCycleDuration().toSeconds();

        @Override
        public void handle(ActionEvent event) {
            if (duration > 1) {
                duration--;
                timeline.setRate(timeline.getCycleDuration().toSeconds() / duration);
            }
        }
    });

    Scene scene = new Scene(root);
    primaryStage.setScene(scene);
    primaryStage.show();
}

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