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paths.lua
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paths.lua
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-------------------------------------------------------------------------------
-- generate paths between buildings
-------------------------------------------------------------------------------
function settlements.paths_lvm(minp)
local c_gravel = minetest.get_content_id("default:gravel")
local starting_point
local end_point
local distance
--for k,v in pairs(settlement_info) do
starting_point = settlement_info[1]["pos"]
for o,p in pairs(settlement_info) do
end_point = settlement_info[o]["pos"]
if starting_point ~= end_point
then
-- loop until end_point is reched (distance == 0)
while true do
-- define surrounding pos to starting_point
local north_p = {x=starting_point.x+1, y=starting_point.y, z=starting_point.z}
local south_p = {x=starting_point.x-1, y=starting_point.y, z=starting_point.z}
local west_p = {x=starting_point.x, y=starting_point.y, z=starting_point.z+1}
local east_p = {x=starting_point.x, y=starting_point.y, z=starting_point.z-1}
-- measure distance to end_point
local dist_north_p_to_end = math.sqrt(
((north_p.x - end_point.x)*(north_p.x - end_point.x))+
((north_p.z - end_point.z)*(north_p.z - end_point.z))
)
local dist_south_p_to_end = math.sqrt(
((south_p.x - end_point.x)*(south_p.x - end_point.x))+
((south_p.z - end_point.z)*(south_p.z - end_point.z))
)
local dist_west_p_to_end = math.sqrt(
((west_p.x - end_point.x)*(west_p.x - end_point.x))+
((west_p.z - end_point.z)*(west_p.z - end_point.z))
)
local dist_east_p_to_end = math.sqrt(
((east_p.x - end_point.x)*(east_p.x - end_point.x))+
((east_p.z - end_point.z)*(east_p.z - end_point.z))
)
-- evaluate which pos is closer to the end_point
if dist_north_p_to_end <= dist_south_p_to_end and
dist_north_p_to_end <= dist_west_p_to_end and
dist_north_p_to_end <= dist_east_p_to_end
then
starting_point = north_p
distance = dist_north_p_to_end
elseif dist_south_p_to_end <= dist_north_p_to_end and
dist_south_p_to_end <= dist_west_p_to_end and
dist_south_p_to_end <= dist_east_p_to_end
then
starting_point = south_p
distance = dist_south_p_to_end
elseif dist_west_p_to_end <= dist_north_p_to_end and
dist_west_p_to_end <= dist_south_p_to_end and
dist_west_p_to_end <= dist_east_p_to_end
then
starting_point = west_p
distance = dist_west_p_to_end
elseif dist_east_p_to_end <= dist_north_p_to_end and
dist_east_p_to_end <= dist_south_p_to_end and
dist_east_p_to_end <= dist_west_p_to_end
then
starting_point = east_p
distance = dist_east_p_to_end
end
-- find surface of new starting point
local surface_point, surface_mat = settlements.find_surface_lvm(starting_point, minp)
-- replace surface node with default:gravel
if surface_point
then
local vi = va:index(surface_point.x, surface_point.y, surface_point.z)
data[vi] = c_gravel
--minetest.swap_node(surface_point,{name="default:gravel"})
-- don't set y coordinate, surface might be too low or high
starting_point.x = surface_point.x
starting_point.z = surface_point.z
end
if distance <= 1 or
starting_point == end_point
then
break
end
end
end
end
--end
--return data
end
-------------------------------------------------------------------------------
-- generate paths between buildings
-------------------------------------------------------------------------------
function settlements.paths()
local starting_point
local end_point
local distance
--for k,v in pairs(settlement_info) do
starting_point = settlement_info[1]["pos"]
for o,p in pairs(settlement_info) do
end_point = settlement_info[o]["pos"]
if starting_point ~= end_point
then
-- loop until end_point is reched (distance == 0)
while true do
-- define surrounding pos to starting_point
local north_p = {x=starting_point.x+1, y=starting_point.y, z=starting_point.z}
local south_p = {x=starting_point.x-1, y=starting_point.y, z=starting_point.z}
local west_p = {x=starting_point.x, y=starting_point.y, z=starting_point.z+1}
local east_p = {x=starting_point.x, y=starting_point.y, z=starting_point.z-1}
-- measure distance to end_point
local dist_north_p_to_end = math.sqrt(
((north_p.x - end_point.x)*(north_p.x - end_point.x))+
((north_p.z - end_point.z)*(north_p.z - end_point.z))
)
local dist_south_p_to_end = math.sqrt(
((south_p.x - end_point.x)*(south_p.x - end_point.x))+
((south_p.z - end_point.z)*(south_p.z - end_point.z))
)
local dist_west_p_to_end = math.sqrt(
((west_p.x - end_point.x)*(west_p.x - end_point.x))+
((west_p.z - end_point.z)*(west_p.z - end_point.z))
)
local dist_east_p_to_end = math.sqrt(
((east_p.x - end_point.x)*(east_p.x - end_point.x))+
((east_p.z - end_point.z)*(east_p.z - end_point.z))
)
-- evaluate which pos is closer to the end_point
if dist_north_p_to_end <= dist_south_p_to_end and
dist_north_p_to_end <= dist_west_p_to_end and
dist_north_p_to_end <= dist_east_p_to_end
then
starting_point = north_p
distance = dist_north_p_to_end
elseif dist_south_p_to_end <= dist_north_p_to_end and
dist_south_p_to_end <= dist_west_p_to_end and
dist_south_p_to_end <= dist_east_p_to_end
then
starting_point = south_p
distance = dist_south_p_to_end
elseif dist_west_p_to_end <= dist_north_p_to_end and
dist_west_p_to_end <= dist_south_p_to_end and
dist_west_p_to_end <= dist_east_p_to_end
then
starting_point = west_p
distance = dist_west_p_to_end
elseif dist_east_p_to_end <= dist_north_p_to_end and
dist_east_p_to_end <= dist_south_p_to_end and
dist_east_p_to_end <= dist_west_p_to_end
then
starting_point = east_p
distance = dist_east_p_to_end
end
-- find surface of new starting point
local surface_point, surface_mat = settlements.find_surface(starting_point)
-- replace surface node with default:gravel
if surface_point
then
minetest.swap_node(surface_point,{name="default:gravel"})
-- don't set y coordinate, surface might be too low or high
starting_point.x = surface_point.x
starting_point.z = surface_point.z
end
if distance <= 1 or
starting_point == end_point
then
break
end
end
end
end
end