import javafx.scene.canvas.GraphicsContext;
import javafx.scene.text.TextAlignment;
import javafx.geometry.VPos;
public class Takisti3{
  int x1, y1, x2, y2;
  int r=5;
  int ringiraadius=20;
  double takistus;
  public Takisti3(int ux1, int uy1, int ux2, int uy2, 
      double takistus){
     if(ux1==ux2 || uy1==uy2){
       x1=ux1; y1=uy1; x2=ux2; y2=uy2;
       this.takistus=takistus;
     } else {
       throw new RuntimeException(
         "Pole horisontaalne ega vertikaalne");
     }
  }
  public void joonista(GraphicsContext g){
     g.setTextAlign(TextAlignment.CENTER);
     g.setTextBaseline(VPos.CENTER);
     g.fillText(String.valueOf(takistus), (x1+x2)/2, (y1+y2)/2);
     g.strokeOval(x1-r, y1-r, 2*r, 2*r);
     g.strokeOval(x2-r, y2-r, 2*r, 2*r);
     g.strokeOval((x1+x2)/2-ringiraadius, 
       (y1+y2)/2-ringiraadius, 2*ringiraadius, 2*ringiraadius);
     int dx=x2-x1;
     int dy=y2-y1;
     double pikkus=Math.sqrt(dx*dx+dy*dy);
     double yx=dx/pikkus;
     double yy=dy/pikkus;
     g.strokeLine(x1+r*yx, y1+r*yy,
       (x1+x2)/2-ringiraadius*yx, (y1+y2)/2-ringiraadius*yy); 
     g.strokeLine(x2-r*yx, y2-r*yy,
       (x1+x2)/2+ringiraadius*yx, (y1+y2)/2+ringiraadius*yy); 
     
  }
}