08160465_黃敬宇,Week17

void setup( ){

   size(300,300);

}

float x=100,y=150;

void draw( )

{

   background(#002966); (背景顏色)

   stroke(#b7efff); (線的顏色)

   line(x,y,200,150);

   fill(#b7efff); (點的顏色)

   ellipse(x,y,13,13);

   ellipse(200,150,13,13);

   if(!mousePressed)

   {

       float dx=x-200;

       float dy=y-150;

       float len=sqrt(dx*dx+dy*dy);

       x-=dx*(len-100)/len*0.1;

       y-=dy*(len-100)/len*0.1;

    }

}

void mouseDragged( )

{

    x=mouseX;

    y=mouseY;

}