JavaFX 中二维对象的各种操作是什么?
JavaFX 支持对二维对象进行三个操作,即 - 并集、差集和交集。
并集操作 - 此操作将两个以上形状作为输入,并返回它们占据的区域。
交集操作 - 此操作将两个以上形状作为输入,并返回它们之间的交集区域。
差集操作 - 此操作将两个以上形状作为输入。然后,它返回第一个形状的区域,不包括第二个形状所重叠的区域。
示例
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;
import javafx.scene.text.Font;
import javafx.scene.text.FontPosture;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text;
public class JavaFXOperations extends Application {
public void start(Stage stage) {
Font font = Font.font("verdana", FontWeight.BOLD, FontPosture.REGULAR, 12);
//Drawing circles for union operation
Circle shape1 = new Circle(65.0f, 135.0f, 50.0f);
Circle shape2 = new Circle(130.0f, 135.0f, 50.0f );
//Union operation
Shape union = Shape.union(shape1, shape2);
union.setFill(Color.RED);
Text label1 = new Text("Union Operation");
label1.setFont(font);
label1.setX(40);
label1.setY(230);
//Drawing circles for union operation
Circle shape3 = new Circle(250.0f, 135.0f, 50.0f);
Circle shape4 = new Circle(325.0f, 135.0f, 50.0f );
//Intersect operation
Shape intersect = Shape.intersect(shape3, shape4);
intersect.setFill(Color.RED);
Text label2 = new Text("Intersect Operation");
label2.setFont(font);
label2.setX(225);
label2.setY(230);
//Drawing circles for union operation
Circle shape5 = new Circle(445.0f, 135.0f, 50.0f);
Circle shape6 = new Circle(510.0f, 135.0f, 50.0f );
//Union operation
Shape subtract = Shape.subtract(shape5, shape6);
subtract.setFill(Color.RED);
Text label3 = new Text("Subtract Operation");
label3.setFont(font);
label3.setX(420);
label3.setY(230);
//Setting the stage
Group root = new Group(
shape1, shape2, shape3, shape4, shape5, shape6,
union, intersect, subtract, label1, label2, label3
);
Scene scene = new Scene(root, 600, 300);
stage.setTitle("2D Operations Example");
stage.setScene(scene);
stage.show();
}
public static void main(String args[]){
launch(args);
}
}输出

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