Robot Test 2

Download source: robotsrc1.zip or JAR file RobotTest2.jar

The robot starts at the center and heads off to explore, only to be stopped at the window edge.

RobotTest2.java

See Robot object code.

import javafx.animation.Animation;
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.shape.*;
import javafx.scene.layout.Pane;
import javafx.scene.layout.BorderPane;
import javafx.scene.control.Label;
import javafx.scene.paint.Color;
import javafx.util.Duration;
import javafx.collections.*;
import java.util.*;

class TestPanel extends Pane
{
    int wait;
    double wd, ht;
    Robot  robot;
    double simtime = 0.0;
    int stage = 0;

    Label status;

    
    TestPanel()
    {
	Path p = new Path();
	ObservableList<PathElement> pe = p.getElements();

	for (int n=0; n<9; n++) {
	    pe.add(new MoveTo(10,10+n*50));
	    pe.add(new LineTo(410,10+n*50));
	    pe.add(new MoveTo(10+n*50,10));
	    pe.add(new LineTo(10+n*50,410));
        }
	p.setStroke(Color.RED);
	getChildren().add(p);

 	robot = new Robot(210,210,24,22,Color.rgb(180,180,255));	
	robot.draw(this);
	
    }

    public void showVelocity() {
	status.setText("   " + robot.showVelocity());
    }



    public void update()
    {
	wd = getWidth();
	ht = getHeight();
	double tstep = 0.05;
	double tmin = 1.0;
	robot.updateVelocity();
	double t = robot.intersect_window(wd,ht);
	if (t<tmin) tmin = t;
	if (tmin<=tstep) {
                robot.move(tmin);
		robot.setVelocity(0,0);
		showVelocity();
	}
	else robot.move(tstep);
	simtime += tstep;
    }
}

public class RobotTest2 extends Application
{

    @Override // Override the start method in the Application class
    public void start(Stage primaryStage) 
    {
	// Create a pane 
	TestPanel pane = new TestPanel();
    	// Create a handler for animation
    	EventHandler<ActionEvent> eventHandler = e -> {
		pane.update();
     };

    // Create an animation
    Timeline animation = new Timeline(
        new KeyFrame(Duration.millis(50), eventHandler));
        animation.setCycleCount(Timeline.INDEFINITE);
        animation.play(); // Start animation

    BorderPane layout = new BorderPane();
    Label label = new Label();
    pane.status = label;
    layout.setCenter(pane);
    layout.setBottom(label);


 
   // Create a scene and place it in the stage
    Scene scene = new Scene(layout, 440, 460);
    primaryStage.setTitle("robot test 2"); // Set the stage title
    primaryStage.setScene(scene); // Place the scene in the stage
    primaryStage.show(); // Display the stage

    }
    public static void main(String args[] )
    {
 	launch(args);
    }
}

Maintained by John Loomis, updated Tue Feb 20 17:41:48 2018