Lighting Effect - (Point Light as Source)


Advertisements

On applying this effect to a node, a light is simulated on it, as if it is being generated by a point light source.

Point Light Source

Point Light Source − The light from this source attenuates in all directions from a single point the intensity of the light depends on the distance of the object from the source.

The class named Point.Spot of the package javafx.scene.effect represents the point light source. This class contains four properties, which include −

  • x − This property is of the type double and it represents the x coordinate of the position of the light.

  • y − This property is of the type double and it represents the y coordinate of the position of the light.

  • z − This property is of the type double and it represents the z coordinate of the position of the light.

Example

The following program is an example demonstrating the lighting effect of JavaFX. In here, we are drawing a text “Welcome to Tutorialspoint” and a circle in a scene.

To these, we are applying the lighting effect, where the light is being emitted by a Point light source.

Save this code in a file with the name PointLightExample.java.

import javafx.application.Application; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.effect.Light; 
import javafx.scene.effect.Lighting; 
import javafx.scene.paint.Color; 
import javafx.scene.shape.Circle;
import javafx.stage.Stage; 
import javafx.scene.text.Font;  
import javafx.scene.text.FontWeight; 
import javafx.scene.text.Text; 
         
public class PointLightExample extends Application { 
   @Override 
   public void start(Stage stage) {  
      //Creating a Text object 
      Text text = new Text();       
      
      //Setting font to the text 
      text.setFont(Font.font(null, FontWeight.BOLD, 40));       
      
      //setting the position of the text 
      text.setX(60); 
      text.setY(50); 
      
      //Setting the text to be embedded. 
      text.setText("Welcome to Tutorialspoint");       
      
      //Setting the color of the text 
      text.setFill(Color.RED);   
       
      //Drawing a Circle 
      Circle circle = new Circle();         
      
      //Setting the center of the circle 
      circle.setCenterX(300.0f); 
      circle.setCenterY(160.0f); 
      
      //Setting the radius of the circle 
      circle.setRadius(100.0f); 
      
      //setting the fill color of the circle 
      circle.setFill(Color.CORNFLOWERBLUE);   
       
      //instantiating the Light.Point class 
      Light.Point light = new Light.Point(); 
      
      //Setting the color of the light
      light.setColor(Color.GRAY);  
      
      //Setting the position of the light 
      light.setX(70); 
      light.setY(55); 
      light.setZ(45); 
       
      //Instantiating the Lighting class  
      Lighting lighting = new Lighting(); 
      
      //Setting the light 
      lighting.setLight(light);  
      
      //Applying the Lighting effect to the text 
      text.setEffect(lighting);      
      
      //Applying the Lighting effect to the circle 
      circle.setEffect(lighting); 
         
      //Creating a Group object  
      Group root = new Group(text,circle);   
               
      //Creating a scene object 
      Scene scene = new Scene(root, 600, 300);  
      
      //Setting title to the Stage 
      stage.setTitle("Point light effect example"); 
         
      //Adding scene to the stage 
      stage.setScene(scene);          
      
      //Displaying the contents of the stage 
      stage.show();         
   } 
   public static void main(String args[]){ 
      launch(args);
   } 
}       

Compile and execute the saved java file from the command prompt using the following commands.

javac PointLightExample.java 
java PointLightExample    

On executing, the above program generates a JavaFX window as shown below.

Point Light Effect Example
javafx_effects.htm
Advertisements