Mirino 1

mouseX e mouseY contengono le coordinate attuali del mouse

• Mouse: posizione del mirino.
• Applicazione Java

int mx, my,
    XX, YY;

void setup()
{
   size(500, 500);
   frameRate(30);
   smooth();

   XX=width;
   YY=height;
}

void draw()
{ 
   background(255);  
   mx=mouseX;
   my=mouseY;

   strokeWeight(3);
   stroke(0, 0, 255);  ellipse(mx, my, 20, 20);
                       line   ( 0, my, XX, my);
                       line   (mx,  0, mx, YY);
}