static int tolua_distance(lua_State * L)
{
int x1 = (int)tolua_tonumber(L, 1, 0);
int y1 = (int)tolua_tonumber(L, 2, 0);
int x2 = (int)tolua_tonumber(L, 3, 0);
int y2 = (int)tolua_tonumber(L, 4, 0);
plane *pl = (plane *)tolua_tousertype(L, 5, 0);
int result;
if (!pl)
pl = get_homeplane();
pnormalize(&x1, &y1, pl);
pnormalize(&x2, &y2, pl);
result = koor_distance(x1, y1, x2, y2);
lua_pushinteger(L, result);
return 1;
}
int distance(const region * r1, const region * r2)
{
return koor_distance(r1->x, r1->y, r2->x, r2->y);
}
