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Explain the Union operation on 2D shapes in JavaFX
This operation takes two or more shapes as inputs and returns the area occupied by them combined as shown below.
The union() (static) method of the javafx.scene.shape.Shape class accepts two Shape objects and returns the result of the union operation of the given objects.
Example
import javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.paint.Color; import javafx.stage.Stage; import javafx.scene.shape.Circle; import javafx.scene.shape.Shape; public class JavaFXUnionExample extends Application { public void start(Stage stage) { //Drawing circle1 Circle circle1 = new Circle(); circle1.setCenterX(230.0f); circle1.setCenterY(100.0f); circle1.setRadius(75.0f); circle1.setFill(Color.DARKRED); //Drawing Circle2 Circle circle2 = new Circle(); circle2.setCenterX(280.0f); circle2.setCenterY(170.0f); circle2.setRadius(75.0f); circle2.setFill(Color.DARKRED); //Drawing Circle3 Circle circle3 = new Circle(); circle3.setCenterX(330.0f); circle3.setCenterY(100.0f); circle3.setRadius(75.0f); circle3.setFill(Color.DARKRED); //Union operation Shape union = Shape.union(circle1, circle2); union = Shape.union(union, circle3); union.setFill(Color.RED); //Setting the stage Group root = new Group(circle1, circle2, circle3, union); Scene scene = new Scene(root, 595, 300); stage.setTitle("Union Operation"); stage.setScene(scene); stage.show(); } public static void main(String args[]){ launch(args); } }
Output
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