javaFX中的转换重置位置
我试图将一个圆从(100200)移动到(400200),一个循环后,圆应该从(100100)移动到(200100),并不断重复该运动。第一次循环后,我使用circle.setCenterX(100)和circle.setCenterY(100)重置圆的位置。但是,这不会反映在动画中。圆将重置为(400100),并在X方向上继续向前移动,而不是重复运动。我是javaFX新手。任何帮助都将不胜感激javaFX中的转换重置位置,java,javafx,transition,Java,Javafx,Transition,我试图将一个圆从(100200)移动到(400200),一个循环后,圆应该从(100100)移动到(200100),并不断重复该运动。第一次循环后,我使用circle.setCenterX(100)和circle.setCenterY(100)重置圆的位置。但是,这不会反映在动画中。圆将重置为(400100),并在X方向上继续向前移动,而不是重复运动。我是javaFX新手。任何帮助都将不胜感激 import javafx.animation.*; import javafx.applicatio
import javafx.animation.*;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
import javafx.util.Duration;
public class Test extends Application
{
public static void main(String[] args)
{
launch(args);
}
final double lambda = 0.1; // pixel per millisecond
double posX = 100;
double posY = 200;
double time = 0;
double velocityX = 1*lambda;
double velocityY = 0*lambda;
Circle circle = new Circle(posX, posY, 20, Color.AQUA);
Circle ref1 = new Circle(100, 200, 5, Color.CADETBLUE);
Circle ref2 = new Circle(400, 200, 5, Color.CADETBLUE);
Circle ref3 = new Circle(100, 100, 5, Color.CADETBLUE);
@Override
public void start(Stage stage) throws Exception
{
Pane pane = new Pane();
pane.getChildren().addAll(circle, ref1, ref2, ref3);
BorderPane root = new BorderPane();
root.setCenter(pane);
root.setStyle("-fx-background-color: #29353B");
double WIDTH = 800;
double HEIGHT = 600;
Scene scene = new Scene(root, WIDTH, HEIGHT);
stage.setScene(scene);
stage.show();
move(3000);
}
public void move(double dt) // dt in milliseconds
{
System.out.println(circle.getCenterX()+", "+circle.getCenterY());
TranslateTransition translateTransition = new TranslateTransition(Duration.millis(dt), circle);
//translateTransition.setInterpolator(Interpolator.LINEAR);
translateTransition.setByX(this.velocityX*dt);
translateTransition.setByY(this.velocityY*dt);
translateTransition.setCycleCount(1);
translateTransition.play();
translateTransition.setOnFinished(actionEvent -> { updatePos(dt); move(2000); });
}
public void updatePos(double dt)
{
//this.posX += this.velocityX*dt;
//this.posY += this.velocityY*dt;
this.posX = 100;
this.posY = 100;
circle.setCenterX(this.posX);
circle.setCenterY(this.posY);
}
}
TranslateTransition
修改translateX
和translateY
属性,而不是centerX
和centerY
属性。如果在动画完成时修改了centerX
和centerY
属性,还应将translateX
和translateY
重置为0,以使圆显示在这些坐标处:
public void updatePos(double dt) {
//this.posX += this.velocityX*dt;
//this.posY += this.velocityY*dt;
this.posX = 100;
this.posY = 100;
circle.setCenterX(this.posX);
circle.setCenterY(this.posY);
circle.setTranslateX(0);
circle.setTranslateY(0);
}
或者,您可以使用时间线
而不是TranslateTransition
来直接操作动画中的centerX
和centerY
属性:
public void move(double dt) /* dt in milliseconds */ {
System.out.println(circle.getCenterX() + ", " + circle.getCenterY());
double targetX = circle.getCenterX() + this.velocityX * dt;
double targetY = circle.getCenterY() + this.velocityY * dt;
Timeline timeline = new Timeline(new KeyFrame(Duration.millis(dt),
new KeyValue(circle.centerXProperty(), targetX),
new KeyValue(circle.centerYProperty(), targetY)));
timeline.setOnFinished(actionEvent -> {
updatePos(dt);
move(2000);
});
timeline.play();
}
public void updatePos(double dt) {
this.posX = 100;
this.posY = 100;
circle.setCenterX(this.posX);
circle.setCenterY(this.posY);
}
TranslateTransition
修改translateX
和translateY
属性,而不是centerX
和centerY
属性。如果在动画完成时修改了centerX
和centerY
属性,还应将translateX
和translateY
重置为0,以使圆显示在这些坐标处:
public void updatePos(double dt) {
//this.posX += this.velocityX*dt;
//this.posY += this.velocityY*dt;
this.posX = 100;
this.posY = 100;
circle.setCenterX(this.posX);
circle.setCenterY(this.posY);
circle.setTranslateX(0);
circle.setTranslateY(0);
}
或者,您可以使用时间线
而不是TranslateTransition
来直接操作动画中的centerX
和centerY
属性:
public void move(double dt) /* dt in milliseconds */ {
System.out.println(circle.getCenterX() + ", " + circle.getCenterY());
double targetX = circle.getCenterX() + this.velocityX * dt;
double targetY = circle.getCenterY() + this.velocityY * dt;
Timeline timeline = new Timeline(new KeyFrame(Duration.millis(dt),
new KeyValue(circle.centerXProperty(), targetX),
new KeyValue(circle.centerYProperty(), targetY)));
timeline.setOnFinished(actionEvent -> {
updatePos(dt);
move(2000);
});
timeline.play();
}
public void updatePos(double dt) {
this.posX = 100;
this.posY = 100;
circle.setCenterX(this.posX);
circle.setCenterY(this.posY);
}