JavaFX - 平移变换



平移变换将对象移动到屏幕上的不同位置。可以通过将平移坐标 (tx, ty) 添加到原始坐标 (X, Y) 来平移二维点,从而得到新的坐标 (X’, Y’)。

Translation

示例

以下程序演示了 JavaFX 中的平移变换。这里,我们创建了两个在相同位置、具有相同尺寸但颜色不同的圆形(节点),颜色分别为棕色和海蓝色。我们还在海蓝色的圆形上应用了平移变换。

将此代码保存到名为 **TranslationExample.java** 的文件中。

import javafx.application.Application; 
import javafx.scene.Group; 
import javafx.scene.Scene; 
import javafx.scene.paint.Color; 
import javafx.scene.shape.Circle; 
import javafx.scene.transform.Translate; 
import javafx.stage.Stage;  

public class TranslationExample extends Application { 
   @Override 
   public void start(Stage stage) {      
      //Drawing Circle1 
      Circle circle = new Circle(); 
      
      //Setting the position of the circle 
      circle.setCenterX(150.0f); 
      circle.setCenterY(135.0f); 
      
      //Setting the radius of the circle 
      circle.setRadius(100.0f); 
      
      //Setting the color of the circle 
      circle.setFill(Color.BROWN); 
      
      //Setting the stroke width of the circle 
      circle.setStrokeWidth(20); 
       
      //Drawing Circle2 
      Circle circle2 = new Circle(); 
      
      //Setting the position of the circle 
      circle2.setCenterX(150.0f); 
      circle2.setCenterY(135.0f); 
      
      //Setting the radius of the circle 
      circle2.setRadius(100.0f); 
      
      //Setting the color of the circle 
      circle2.setFill(Color.CADETBLUE); 
      
      //Setting the stroke width of the circle 
      circle2.setStrokeWidth(20); 
       
      //Creating the translation transformation 
      Translate translate = new Translate();       
      
      //Setting the X,Y,Z coordinates to apply the translation 
      translate.setX(300); 
      translate.setY(50); 
      translate.setZ(100);  
      
      //Adding transformation to circle2 
      circle2.getTransforms().addAll(translate); 
       
      //Creating a Group object  
      Group root = new Group(circle,circle2); 
         
      //Creating a scene object 
      Scene scene = new Scene(root, 600, 300);  
      
      //Setting title to the Stage 
      stage.setTitle("Translation transformation 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); 
   } 
} 

使用以下命令在命令提示符下编译并执行保存的 Java 文件。

javac TranslationExample.java 
java TranslationExample 

执行后,上述程序将生成如下所示的 JavaFX 窗口。

Translate Transformation
javafx_transformations.htm
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