+− begin +− X:= X + dX; +− Y:= Y + dY; +− tx:= round(X); +− ty:= round(Y); +− if ((ty and $FFFFFC00) = 0) and ((tx and $FFFFF800) = 0)and (Land[ty, tx] = $FFFFFF) then +− SetLandPixel(ty, tx) +− end;