仅当两个矩形在同一轴上相遇时，我的程序的转换才应该停止（通过调用stop()方法，您会看到它在注释被标记为//my problem starts here的位置）。但是由于某种原因，当轴不在同一轴上并且它们在同一轴上时，过渡停止。没有语法错误。
请帮我。非常感谢你。
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.control.*;
import javafx.event.Event;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.shape.*;
import javafx.scene.paint.Color;
import javafx.animation.PathTransition;
import javafx.animation.Timeline;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.util.Duration;
import java.lang.*;
import java.util.logging.Level;
import java.util.logging.Logger;
public class TransoFo extends Application{
public void start(Stage stage) {
Pane p = new Pane();
Button b = new Button("Play");
b.setStyle("-fx-background-radius: 3em;" +
"-fx-background-color: #66a3ff;" +
"-fx-min-width: 120;" +
"-fx-min-height: 40;" +
"-fx-max-width: 120;" +
"-fx-min-height: 40;" +
"-fx-cursor: hand;" +
"-fx-text-fill: white;");
b.setLayoutX(307);
b.setLayoutY(400);
Circle bi = new Circle();
Rectangle biRec = new Rectangle();
Circle circle = new Circle();
Rectangle rec = new Rectangle();
rec.setWidth(20);
rec.setHeight(30);
rec.setArcWidth(5);
rec.setArcHeight(5);
rec.setStyle("-fx-fill: #ff9933;" +
"-fix-stroke-width: 20;" +
"-fix-stroke: #ff4d4d;");
circle.setStyle("-fx-fill: #88ff4d;" +
"-fx-stroke-width: 12;" +
"-fx-stroke: #3399ff;");
circle.setCenterX(370);
circle.setCenterY(250);
circle.setRadius(50);
biRec.setWidth(30);
biRec.setHeight(20);
biRec.setArcWidth(5);
biRec.setArcHeight(5);
biRec.setStyle("-fx-fill: #ff9933;" +
"-fix-stroke-width: 20;" +
"-fix-stroke: #ff4d4d;");
bi.setStyle("-fx-fill: #88ff4d;" +
"-fx-stroke-width: 12;" +
"-fx-stroke: #3399ff;");
bi.setCenterX(370);
bi.setCenterY(250);
bi.setRadius(100);
p.getChildren().addAll(bi, biRec, circle, rec);
// transition for small circle and rectangle
PathTransition pt1 = new PathTransition();
pt1.setDuration(Duration.millis(1200));
pt1.setPath(bi);
pt1.setNode(biRec);
pt1.setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pt1.setCycleCount(Timeline.INDEFINITE);
pt1.setAutoReverse(false);
pt1.play();
PathTransition pt3 = new PathTransition();
pt3.setDuration(Duration.millis(800));
pt3.setPath(circle);
pt3.setNode(rec);
pt3.setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pt3.setCycleCount(Timeline.INDEFINITE);
pt3.setAutoReverse(false);
pt3.play();
// button play event lambda expression
b.setOnAction((ActionEvent event) -> {
bi.setVisible(false);
biRec.setVisible(false);
circle.setVisible(false);
rec.setVisible(false);
b.setVisible(false);
Circle big = new Circle();
// create rectangle for big circle
Rectangle bigRec = new Rectangle();
Circle circ = new Circle();
Rectangle r = new Rectangle();
//event for small rectangle
r.setWidth(20);
r.setHeight(30);
r.setArcWidth(5);
r.setArcHeight(5);
r.setStyle("-fx-fill: #ff9933;" +
"-fix-stroke-width: 20;" +
"-fix-stroke: #ff4d4d;");
circ.setStyle("-fx-fill: #88ff4d;" +
"-fx-stroke-width: 12;" +
"-fx-stroke: #3399ff;");
circ.setCenterX(370);
circ.setCenterY(300);
circ.setRadius(50);
bigRec.setWidth(30);
bigRec.setHeight(20);
bigRec.setArcWidth(5);
bigRec.setArcHeight(5);
bigRec.setStyle("-fx-fill: #ff9933;" +
"-fix-stroke-width: 20;" +
"-fix-stroke: #ff4d4d;");
big.setStyle("-fx-fill: #88ff4d;" +
"-fx-stroke-width: 12;" +
"-fx-stroke: #3399ff;");
big.setCenterX(370);
big.setCenterY(300);
big.setRadius(100);
// transition for small circle and rectangle
PathTransition pt2 = new PathTransition();
pt2.setDuration(Duration.millis(1200));
pt2.setPath(big);
pt2.setNode(bigRec);
pt2.setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pt2.setCycleCount(Timeline.INDEFINITE);
pt2.setAutoReverse(true);
pt2.play();
PathTransition pt = new PathTransition();
pt.setDuration(Duration.millis(800));
pt.setPath(circ);
pt.setNode(r);
pt.setOrientation(PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT);
pt.setCycleCount(Timeline.INDEFINITE);
pt.setAutoReverse(false);
pt.play();
Button b2 = new Button(" | | ");
b2.setStyle("-fx-background-radius: 3em;" +
"-fx-background-color: #66a3ff;" +
"-fx-min-width: 70;" +
"-fx-min-height: 40;" +
"-fx-max-width: 700;" +
"-fx-min-height: 40;" +
"-fx-cursor: hand;" +
"-fx-text-fill: white;");
b2.setLayoutX(670);
b2.setLayoutY(10);
b2.setOnAction((ActionEvent event1) -> {
pt2.stop();
pt.stop();
});
Button b3 = new Button(" ▶ ");
b3.setStyle("-fx-background-radius: 3em;" +
"-fx-background-color: #66a3ff;" +
"-fx-min-width: 70;" +
"-fx-min-height: 40;" +
"-fx-max-width: 700;" +
"-fx-min-height: 40;" +
"-fx-cursor: hand;" +
"-fx-text-fill: white;");
b3.setLayoutX(590);
b3.setLayoutY(10);
b3.setOnAction((ActionEvent event2) -> {
pt.play();
pt2.play();
});
Button match = new Button(" Match ");
match.setStyle("-fx-background-radius: 3em;" +
"-fx-background-color: #66a3ff;" +
"-fx-min-width: 120;" +
"-fx-min-height: 40;" +
"-fx-max-width: 120;" +
"-fx-min-height: 40;" +
"-fx-cursor: hand;" +
"-fx-text-fill: white;");
match.setLayoutX(310);
match.setLayoutY(450);
// here is the button Match's event (lambda expression)
match.setOnAction((ActionEvent evt) -> {
// here is where my problem start
int y = (int) r.getY();
int y1 = (int) bigRec.getY();
if(y == y1){
pt.stop();
pt2.stop();
}
//here is where it ends
});
p.getChildren().addAll(big, bigRec, circ, r, b2, b3, match);
});
p.getChildren().add(b);
p.setStyle("-fx-background-color: #88ff4d;");
Scene s = new Scene(p, 750, 650);
stage.setScene(s);
stage.show();
}
// launch Application
public static void main(String[] args) {
Application.launch(args);
}
}
最佳答案
您所有y的Rectangle属性都不会在代码的任何地方被修改。他们始终保持默认值0.0。这就是为什么y == y1总是产生true的原因。 PathTransition用于转换（translateX，translateY，rotate）。
即使您解决了这个问题，您也需要了解一个事实，即您正在处理的浮点值是计算结果，这意味着您不太可能获得完全匹配。您需要在那里允许一些错误...
另外，您还需要注意以下事实：使用PathTransition.OrientationType.ORTHOGONAL_TO_TANGENT的Rectangle将被旋转，这意味着旧的顶部可能不再位于顶部，这引出了您要比较哪些点的问题。
以下示例检查两个矩形在y坐标中是否重叠：
match.setOnAction((ActionEvent evt) -> {
Bounds bBounds = bigRec.getBoundsInParent();
Bounds bounds = r.getBoundsInParent();
if (bounds.getMinY() <= bBounds.getMaxY() && bounds.getMaxY() >= bBounds.getMinY()) {
pt.stop();
pt2.stop();
}
});