java JavaFX | PointLight 带示例

JavaFX | PointLight 带示例

原文:https://www . geesforgeks . org/JavaFX-point light-with-examples/

PointLight 是 JavaFX 的一部分。点光源定义了一个点光源。点光源是空间中的固定光源，向各个方向辐射光线。

该类的构造函数为:

点光源():创建点光源的新实例
点光源(颜色 c) :创建特定颜色的点光源的新实例

常用方法:

方法	说明
获得颜色（）	返回光线的颜色
isLightOn()	返回灯是否亮着
设置颜色(颜色值)	设置灯光的颜色
setLightOn(布尔值)	设置 lightOn 属性的值。

下面的程序说明了点光源类:

Java program to create a point light of default color: This program creates a Sphere indicated by the name sphere(radius is passed as arguments). A PointLight is created named pointlight which is a point light source and radiates light in all direction. The Sphere 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 sphere and pointlight are attached. The group is attached to the scene. Finally, the show() method is called to display the final results. A perspective camera will be created and added to the scene to render the cylinder in 3D.

```java // Java program to create a point light of default color import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.shape.DrawMode; import javafx.scene.layout.; import javafx.event.ActionEvent; import javafx.scene.PointLight; import javafx.scene.shape.Sphere; import javafx.scene.control.; import javafx.stage.Stage; import javafx.scene.Group; import javafx.scene.PerspectiveCamera; import javafx.scene.paint.Color;

public class pointlight_2 extends Application {

// launch the application     public void start(Stage stage)     {

// set title for the stage         stage.setTitle("creating sphere");

// create a sphere         Sphere sphere = new Sphere(80.0f);

// create a point light         PointLight pointlight = new PointLight();

// create a Group         Group group = new Group(sphere, pointlight);

// translate the sphere to a position         sphere.setTranslateX(100);         sphere.setTranslateY(100);

// translate point light         pointlight.setTranslateZ(-1000);         pointlight.setTranslateX(+1000);         pointlight.setTranslateY(+10);

// create a perspective camera         PerspectiveCamera camera = new PerspectiveCamera(false);         camera.setTranslateX(0);         camera.setTranslateY(0);         camera.setTranslateZ(0);

// create a scene         Scene scene = new Scene(group, 500, 300);

scene.setCamera(camera);

// set the scene         stage.setScene(scene);

stage.show();     }

// Main Method     public static void main(String args[])     {

// launch the application         launch(args);     } } ```

输出:
Java program to create a point light of a specified color(e.g. RED): This program creates a Sphere indicated by the name sphere( radius is passed as arguments). A PointLight is created named pointlight( with a specified color passed as an argument which is a point light source and radiates light in all direction. The Sphere 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 sphere and pointlight are attached. The group is attached to the scene. Finally, the show() method is called to display the final results. A perspective camera will be created and added to the scene to render the cylinder in 3D.

```java // Java program to create a point light // of specified color(eg RED) import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.shape.DrawMode; import javafx.scene.layout.; import javafx.event.ActionEvent; import javafx.scene.PointLight; import javafx.scene.shape.Sphere; import javafx.scene.control.; import javafx.stage.Stage; import javafx.scene.Group; import javafx.scene.PerspectiveCamera; import javafx.scene.paint.Color;

public class sphere_1 extends Application {

// launch the application     public void start(Stage stage)     {

// set title for the stage         stage.setTitle("creating sphere");

// create a sphere         Sphere sphere = new Sphere(80.0f);

// create a point light         PointLight pointlight = new PointLight(Color.RED);

// create a Group         Group group = new Group(sphere, pointlight);

// translate the sphere to a position         sphere.setTranslateX(100);         sphere.setTranslateY(100);

// translate point light         pointlight.setTranslateZ(-1000);         pointlight.setTranslateX(+1000);         pointlight.setTranslateY(+10);

// create a perspective camera         PerspectiveCamera camera = new PerspectiveCamera(false);         camera.setTranslateX(0);         camera.setTranslateY(0);         camera.setTranslateZ(0);

// create a scene         Scene scene = new Scene(group, 500, 300);

scene.setCamera(camera);

// set the scene         stage.setScene(scene);

stage.show();     }

// Main Method     public static void main(String args[])     {

// launch the application         launch(args);     } } ```

输出: