double xx,yy;
double x1=x*i->zoom,y1=y*i->zoom;
double x2=line->sx*i->zoom,y2=line->sy*i->zoom;
double x3=line->x*i->zoom,y3=line->y*i->zoom;
double xx,yy;
double x1=x*i->zoom,y1=y*i->zoom;
double x2=line->sx*i->zoom,y2=line->sy*i->zoom;
double x3=line->x*i->zoom,y3=line->y*i->zoom;