%% Returns distance between two points (x1,z1) and (x2,z2) given by two-element arrays
%% ======================================================================================
%%
%% Parameters:
%%	p1, p2 - points. Each is given by two-element arrays  containing x and y coordinates
%%
%% Returns:
%%	d - Euclidean distance between the points

function d = distance(p1,p2)

  r = p2 - p1;

  d = sqrt(sum(r.*r));		% square root of dot product

end