JavaFX | Light.Spot Class

Light.Spot class is a part of JavaFX. Light.Spot class is used to create a spot light with configurable values of direction vector of light, focus and Color in 3D space. Light.Spot class inherits Light.Point class.

Constructors of the class:

1. Spot(): Creates a spot light with default values
2. Spot(double x, double y, double z, double s, Color c): Creates a spot light with specified values of x, y, z, specularExponent and color of light

Commonly Used Methods:

Methods	Explanation
getPointsAtX()	Returns the x coordinate of the direction vector of light.
getPointsAtY()	Returns the y coordinate of the direction vector of light.
getPointsAtZ()	Returns the z coordinate of the direction vector of light.
getSpecularExponent()	Returns the value of specularExponent.
setPointsAtX(double v)	Sets the value of x coordinate of the direction vector of light.
setPointsAtY(double v)	Sets the value of y coordinate of the direction vector of light.
setPointsAtZ(double v)	Sets the value of z coordinate of the direction vector of light.
setSpecularExponent(double v)	Sets the value of specularExponent.

Below programs illustrate the use of Light.Spot class:

1. Java Program to create a Spot light and add it to a rectangle: In this program we will create a Rectangle named rectangle with specified height and width. We will also create a Light.Spot object named light. We will set the x, y, z values using setX(), setY() and setZ() function. Now create a lighting object and add the light object to lighting using setLight() function. We will set the Lighting effect to the Rectangle and add it to the scene and add the scene to the stage and call the show function to display the results.

   // Java Program to create a Spot light
   // and add it to a rectangle
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.shape.Rectangle;
   import javafx.scene.control.*;
   import javafx.stage.Stage;
   import javafx.scene.Group;
   import javafx.scene.effect.Light.*;
   import javafx.scene.effect.*;
   import javafx.scene.paint.Color;
   
   public class Spot_1 extends Application {
   
       // launch the application
       public void start(Stage stage)
       {
   
           // set title for the stage
           stage.setTitle("creating Light.Spot");
   
           // create Spot Light object
           Light.Spot light = new Light.Spot();
   
           // set coordinates
           light.setX(100);
           light.setY(100);
           light.setZ(100);
   
           // create a lighting
           Lighting lighting = new Lighting();
   
           // set Light of lighting
           lighting.setLight(light);
   
           // create a rectangle
           Rectangle rect = new Rectangle(250, 250);
   
           // set fill
           rect.setFill(Color.WHITE);
   
           // set effect
           rect.setEffect(lighting);
   
           // create a Group
           Group group = new Group(rect);
   
           // create a scene
           Scene scene = new Scene(group, 500, 300);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       // Main Method
       public static void main(String args[])
       {
   
           // launch the application
           launch(args);
       }
   }

   Output:

   

2. Java Program to create a Spotlight and add it to a rectangle and set the coordinates of the direction vector of light and color of light: In this program we will create a Rectangle named rectangle with specified height and width. We will also create a Light.Spot object named light. We will set the x, y, z values using setX(), setY() and setZ() function. The coordinate of the direction vector of light is set using setPointsAtX(), setPointsAtY() and setPointsAtX(), and specify the value of color using setColor() function Now create a lighting object and add the light object to lighting using setLight() function. We will set the Lighting effect to the Rectangle and add it to the scene and add the scene to the stage and call the show function to display the results.

   // Java Program to create a Spot light
   // and add it to a rectangle and set the
   // coordinates of direction vector of
   // light and color of light
   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.scene.shape.Rectangle;
   import javafx.scene.control.*;
   import javafx.stage.Stage;
   import javafx.scene.Group;
   import javafx.scene.effect.Light.*;
   import javafx.scene.effect.*;
   import javafx.scene.paint.Color;
   
   public class Spot_2 extends Application {
   
       // launch the application
       public void start(Stage stage)
       {
   
           // set title for the stage
           stage.setTitle("creating Light.Spot");
   
           // create Spot Light object
           Light.Spot light = new Light.Spot();
   
           // set coordinate of direction
           // the vector of this light
           light.setPointsAtX(0);
           light.setPointsAtY(0);
           light.setPointsAtZ(-60);
   
           // set specular exponent
           light.setSpecularExponent(2);
   
           // set color of light
           light.setColor(Color.RED);
   
           // set coordinates
           light.setX(100);
           light.setY(100);
           light.setZ(200);
   
           // create a lighting
           Lighting lighting = new Lighting();
   
           // set Light of lighting
           lighting.setLight(light);
   
           // create a rectangle
           Rectangle rect = new Rectangle(250, 250);
   
           // set fill
           rect.setFill(Color.WHITE);
   
           // set effect
           rect.setEffect(lighting);
   
           // create a Group
           Group group = new Group(rect);
   
           // create a scene
           Scene scene = new Scene(group, 500, 300);
   
           // set the scene
           stage.setScene(scene);
   
           stage.show();
       }
   
       // Main Method
       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/effect/Light.Spot.html