JavaFX node random move
I want to create a "rectangle" and change its coordinates at a random location every time it comes to its starting position. First, I don't even know if it is possible to do this, if it is, I would like to give an example of how it works. JavaFX is new to me, so I don't know much about it, so I made it move (rectangle) to a random location and it loops endlessly, which is nice, but not what I need: D.
public class Java2 extends Application {
public static final int PANEL_WIDTH = 600;
public static final int PANEL_HEIGHT = 600;
@Override
public void start(Stage primaryStage) {
Random ran = new Random();
int loc= ran.nextInt(600 - 300 + 1) + 300; //min=300 , max=600
Rectangle rekt = new Rectangle(20, 20);
Pane root = new Pane();
root.getChildren().add(rekt);
Scene scene = new Scene(root, PANEL_WIDTH, PANEL_HEIGHT);
PathTransition pathTransition = new PathTransition();
Path path = new Path();
path.getElements().add(new MoveTo(20,20));
path.getElements().add(new LineTo(loc,600));
pathTransition.setDuration(javafx.util.Duration.millis(4000));
pathTransition.setPath(path);
pathTransition.setNode(rekt);
pathTransition.setOrientation(
PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pathTransition.setCycleCount(Timeline.INDEFINITE);
pathTransition.setAutoReverse(true);
pathTransition.play();
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
r1.requestFocus();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}
+3
source to share
1 answer
You can use the PathTransition setOnFinished method and add a new path there and start the path transition again.
I set the loop count to 2. Loop 1 is one direction, but since you have auto reverse enabled, loop 2 is the direction back to the origin.
When this is complete, a new path will be set and the transition will play again.
import javafx.animation.PathTransition;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class Java2 extends Application {
public static final int PANEL_WIDTH = 600;
public static final int PANEL_HEIGHT = 600;
Random ran = new Random();
@Override
public void start(Stage primaryStage) {
Rectangle rekt = new Rectangle(20, 20);
Pane root = new Pane();
root.getChildren().add(rekt);
Scene scene = new Scene(root, PANEL_WIDTH, PANEL_HEIGHT);
PathTransition pathTransition = new PathTransition();
pathTransition.setDuration(javafx.util.Duration.millis(500));
pathTransition.setPath(createPath());
pathTransition.setNode(rekt);
pathTransition.setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pathTransition.setCycleCount(2);
pathTransition.setAutoReverse(true);
pathTransition.setOnFinished(e -> {
pathTransition.setPath(createPath());
pathTransition.play();
});
pathTransition.play();
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
private Path createPath() {
int loc = ran.nextInt(600 - 300 + 1) + 300; // min=300 , max=600
Path path = new Path();
path.getElements().add(new MoveTo(20, 20));
path.getElements().add(new LineTo(loc, 600));
return path;
}
public static void main(String[] args) {
launch(args);
}
}
+2
source to share