QuadCurve is a part of JavaFX. The Quadcurve class defines a quadratic Bézier parametric curve segment in (x, y) coordinate space. The curve passes through the starting point and the ending point and also the control point. The specified control point is used as Bézier control point.
Constructor for the class are:
- QuadCurve(): creates an empty instance of quad curve
- QuadCurve(double sX, double sY, double cX, double cY, double eX, double eY):creates a new instance of quad curve with specified starting point, ending point and control point.
commonly used methods
| Method | Explanation |
|---|---|
| getControlX() | returns the x coordinate for the control point |
| getControlY() | returns the y coordinate for the control point |
| getEndX() | returns the x coordinate for the end point |
| getEndY() | returns the y coordinate for the end point |
| getStartX() | returns the x coordinate for the start point |
| getStartY() | returns the y coordinate for the start point |
| setControlX(double value) | sets the x coordinate for the control point |
| setControlY(double value) | sets the y coordinate for the control point |
| setEndX(double value) | sets the x coordinate for the end point |
| setEndY(double value) | sets the y coordinate for the end point |
| setStartX(double value) | sets the x coordinate for the start point |
| setStartY(double value) | sets the y coordinate for the start point |
The following programs will illustrate the use of QuadCurve
Java program to create a quad curve
This program creates a QuadCurve indicated by the name quad_curve( control point, start point and end point is passed as arguments).
The QuadCurve will be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a Group is created, and the quad_curve is attached. The group is attached to the scene. Finally, the show() method is called to display the final results.
// Java program to create a quad curveimport javafx.application.Application;import javafx.scene.Scene;import javafx.scene.shape.DrawMode;import javafx.scene.layout.*;import javafx.event.ActionEvent;import javafx.scene.shape.QuadCurve;import javafx.scene.control.*;import javafx.stage.Stage;import javafx.scene.Group;public class quad_curve_0 extends Application { // launch the application public void start(Stage stage) { // set title for the stage stage.setTitle("creating quad_curve"); // create a quad_curve QuadCurve quad_curve = new QuadCurve(10.0f, 10.0f, 120.0f, 240.0f, 160.0f, 70.0f); // create a Group Group group = new Group(quad_curve); // translate the quad_curve to a position quad_curve.setTranslateX(100); quad_curve.setTranslateY(100); // create a scene Scene scene = new Scene(group, 500, 300); // set the scene stage.setScene(scene); stage.show(); } public static void main(String args[]) { // launch the application launch(args); }} |
Output
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Java program to create a quad curve and set a fill for quad curve
This program creates a QuadCurve indicated by the name quad_curve( control point, start point and end point are set using setControlX(), setControlY(), setStartX(), setStartY(), setEndX(), ans setEndY() functions). The QuadCurvewill be created inside a scene, which in turn will be hosted inside a stage. The function setTitle() is used to provide title to the stage. Then a Group is created, and the quad_curve is attached.The group is attached to the scene. Finally, the show() method is called to display the final results.The function setFill() is used to set fill for the quad curve.
// Java program to create a quad curve// and set a fill for quad curveimport javafx.application.Application;import javafx.scene.Scene;import javafx.scene.shape.DrawMode;import javafx.scene.layout.*;import javafx.event.ActionEvent;import javafx.scene.shape.QuadCurve;import javafx.scene.control.*;import javafx.stage.Stage;import javafx.scene.Group;import javafx.scene.paint.Color;public class quad_curve_1 extends Application { // launch the application public void start(Stage stage) { // set title for the stage stage.setTitle("creating quad_curve"); // create a quad_curve QuadCurve quad_curve = new QuadCurve(); // set start quad_curve.setStartX(10.0f); quad_curve.setStartY(10.0f); // set control coordinates quad_curve.setControlX(120.0f); quad_curve.setControlY(240.0f); // set end coordinates quad_curve.setEndX(160.0f); quad_curve.setEndY(70.0f); // create a Group Group group = new Group(quad_curve); // translate the quad_curve to a position quad_curve.setTranslateX(100); quad_curve.setTranslateY(100); // set fill for the quad curve quad_curve.setFill(Color.BLUE); // create a scene Scene scene = new Scene(group, 500, 300); // set the scene stage.setScene(scene); stage.show(); } public static void main(String args[]) { // launch the application launch(args); }} |
output:
Note : The above programs might not run in an online IDE please use an offline compiler
Reference:
https://docs.oracle.com/javase/8/javafx/api/javafx/scene/shape/QuadCurve.html
