javafx如何绘制一条动态的正弦波线?

Question

在一个给定宽度和高度的AnchorPane如何绘制一条动态的正弦波线?像波浪一样一直在流动?

Answer 1

（Java）正弦曲线的绘制：https://blog.csdn.net/qq_43492547/article/details/107719979

Main.java:

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

public class Main extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) {
        AnchorPane anchorPane = new AnchorPane();
        anchorPane.setPrefSize(800, 300);
        Scene scene = new Scene(anchorPane);
        primaryStage.setScene(scene);
        primaryStage.setTitle("Dynamic Sine Wave");
        primaryStage.show();

        DynamicSineWave dynamicSineWave = new DynamicSineWave(anchorPane.getPrefWidth(), anchorPane.getPrefHeight(), 50, 0.05);
        anchorPane.getChildren().add(dynamicSineWave.getSineWave());
        dynamicSineWave.startAnimation();
    }
}

DynamicSineWave.java:

import javafx.animation.PathTransition;
import javafx.scene.paint.Color;
import javafx.scene.shape.*;
import javafx.util.Duration;

public class DynamicSineWave {
    private Path sineWave;
    private PathTransition pathTransition;

    public DynamicSineWave(double width, double height, double amplitude, double frequency) {
        sineWave = createSineWave(width, height, amplitude, frequency);
        sineWave.setStroke(Color.BLUE);
        sineWave.setStrokeWidth(2);
        setupAnimation();
    }

    private Path createSineWave(double width, double height, double amplitude, double frequency) {
        Path path = new Path();
        path.getElements().add(new MoveTo(0, height / 2));
        for (double x = 0; x <= width; x++) {
            double y = height / 2 + amplitude * Math.sin(frequency * x);
            path.getElements().add(new LineTo(x, y));
        }
        return path;
    }

    private void setupAnimation() {
        pathTransition = new PathTransition();
        pathTransition.setPath(sineWave);
        pathTransition.setNode(sineWave);
        pathTransition.setDuration(Duration.seconds(2));
        pathTransition.setCycleCount(PathTransition.INDEFINITE);
        pathTransition.setAutoReverse(false);
    }

    public Path getSineWave() {
        return sineWave;
    }

    public void startAnimation() {
        pathTransition.play();
    }
}