如何檢測矩形之間的碰撞？

Question

我想要檢測到rect遇到障礙時（obst1和obst2，現在不添加obst3）。我的障礙正在與路徑轉變。所有的形狀都是矩形。 提前謝謝！
這裏是我的代碼：

Rectangle rect= new Rectangle(100,225,50,125); 
    Rectangle obst1=new Rectangle(1200,300,30,50); 
    Rectangle obst2=new Rectangle(1200,300,91,51); 
    Rectangle obst3=new Rectangle(1200,300,20,50); 

    ImagePattern one = new ImagePattern(new Image("1.png")); 
    ImagePattern two = new ImagePattern(new Image("2.png")); 
    ImagePattern cactus1 = new ImagePattern(new Image("1cactus.png")); 
    ImagePattern cactus4 = new ImagePattern(new Image("4cactus.png")); 
    rect.setFill(one);`enter code here` 

    rect.setArcHeight(5); 
    rect.setArcWidth(5); 
    //rect.setFill(Color.VIOLET); 
    obst1.setFill(cactus1); 
    obst3.setFill(RED); 
    obst2.setFill(cactus4); 

    PathTransition path = new PathTransition(); 
    path.setPath(l2); 
    path.setNode(obst1); 
    path.setDuration(Duration.millis(3000)); 
    path.setCycleCount(Timeline.INDEFINITE); 
    path.setRate(-0.5); 
    //path.play(); 

    PathTransition path2 = new PathTransition(); 
    path2.setPath(l2); 
    path2.setNode(obst2); 
    path2.setDuration(Duration.millis(3000)); 
    path2.setCycleCount(Timeline.INDEFINITE); 
    path2.setRate(-0.6); 
    //path2.play(); 

    PathTransition path3 = new PathTransition(); 
    path3.setPath(l2); 
    path3.setNode(obst2); 
    path3.setDuration(Duration.millis(3000)); 
    path3.setCycleCount(Timeline.INDEFINITE); 
    path3.setRate(-0.3); 
    //path3.play(); 

    int TimeLine=2; 

    Pane pane = new Pane(); 
    pane.getChildren().add(obst1); 
    pane.getChildren().add(obst2); 
    //pane.getChildren().add(obst3); 
    pane.getChildren().add(rect); 
    pane.getChildren().add(l1); 

    Scene scene = new Scene(pane, 300, 250); 

    TranslateTransition tt = new TranslateTransition(Duration.millis(300)); 
    tt.setFromY(00f); 
    tt.setToY(-100f); 
    tt.setCycleCount(TimeLine); 
    tt.setAutoReverse(true); 

    ParallelTransition pt = new ParallelTransition(rect, tt); 

    scene.setOnKeyPressed(e-> 
     { 
      if(e.getCode()==KeyCode.UP) 
      { 
       pt.play(); 
      } 
      if(e.getCode()==KeyCode.ESCAPE) 
      { 
        path.pause(); 
        path2.pause(); 
        path3.pause(); 
        pt.pause(); 
      } 
      if(e.getCode()==KeyCode.ENTER) 
      { 
        path.play(); 
        path2.play(); 
        path3.play(); 
        pt.play(); 
      } 
     }); 


     EventHandler<ActionEvent> eventHandler = e -> 
       { 
        if(img==1) 
        { 
         rect.setFill(two); 
         img=2; 
        } 
        else 
        { 
         rect.setFill(one); 
         img=1; 
        } 
       }; 

       Timeline animation = new Timeline(
        new KeyFrame(Duration.millis(80), eventHandler)); 
       animation.setCycleCount(Timeline.INDEFINITE); 
       animation.play(); 





     primaryStage.setTitle("Dinausor"); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 

Answer 1

如果所有的形狀Rectangle對象，你可以使用intersects(...)方法來檢查碰撞。這裏是一個例子：

Rectangle r1 = new Rectangle(0,0,100,100); 
Rectangle r2 = new Rectangle(50,50,100,100); 
System.out.println(r1.intersects(r2));// prints "true".