Simple Navigator X,Y coordinates

[westes]

I wrote a program that uses SimpleNavigator to write X,Y cordinates to the screen. It stays at 0.0 instead of inclining. Heres my code:\

Code: Select all

import lejos.navigation.SimpleNavigator;

import lejos.nxt.Button;
import lejos.nxt.LCD;
import lejos.nxt.Motor;

public class NavTest {


   public static void main(String[] args)  {
      
      SimpleNavigator nav = new SimpleNavigator(5.6F,12.635F,Motor.B,Motor.A);
             
               nav.setSpeed(500);
               nav.forward();
               while(!Button.ENTER.isPressed()) {
                  float X = nav.getX();
                  float Y = nav.getX();
                  LCD.drawString("" + X ,0,0);
                  LCD.drawString("" + Y ,0,2);
               }
               
   }

}


[Cyber]

hmm i think the updatePosition() is only called if you do nav.stop() so the new coordinates are not recognized.
but maybe i´m wrong =)

[lawrie]

Yes, that is true. If you call a method like forward or backward you need to call stop, before the position is updated. We don't currently have a navigator that continously updates the position.

[westes]

That seemed to do the trick. How did I miss that function in the documentation?

[Cyber]

Don´t read the Documentation, read the Sources =)

[westes]

Yeah.
All I had to do is call the update position on the navigator.
Thanks again!