92 lines
3.5 KiB
Lua
92 lines
3.5 KiB
Lua
-------------------------------------------------------------------------------
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-- generate paths between buildings
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-------------------------------------------------------------------------------
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function settlements.paths(settlement_info)
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local starting_point
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local end_point
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local distance
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--for k,v in pairs(settlement_info) do
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starting_point = settlement_info[1]["pos"]
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for o,p in pairs(settlement_info) do
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end_point = settlement_info[o]["pos"]
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if starting_point ~= end_point
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then
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-- loop until end_point is reched (distance == 0)
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while true do
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-- define surrounding pos to starting_point
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local north_p = {x=starting_point.x+1, y=starting_point.y, z=starting_point.z}
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local south_p = {x=starting_point.x-1, y=starting_point.y, z=starting_point.z}
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local west_p = {x=starting_point.x, y=starting_point.y, z=starting_point.z+1}
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local east_p = {x=starting_point.x, y=starting_point.y, z=starting_point.z-1}
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-- measure distance to end_point
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local dist_north_p_to_end = math.sqrt(
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((north_p.x - end_point.x)*(north_p.x - end_point.x))+
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((north_p.z - end_point.z)*(north_p.z - end_point.z))
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)
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local dist_south_p_to_end = math.sqrt(
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((south_p.x - end_point.x)*(south_p.x - end_point.x))+
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((south_p.z - end_point.z)*(south_p.z - end_point.z))
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)
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local dist_west_p_to_end = math.sqrt(
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((west_p.x - end_point.x)*(west_p.x - end_point.x))+
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((west_p.z - end_point.z)*(west_p.z - end_point.z))
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)
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local dist_east_p_to_end = math.sqrt(
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((east_p.x - end_point.x)*(east_p.x - end_point.x))+
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((east_p.z - end_point.z)*(east_p.z - end_point.z))
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)
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-- evaluate which pos is closer to the end_point
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if dist_north_p_to_end <= dist_south_p_to_end and
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dist_north_p_to_end <= dist_west_p_to_end and
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dist_north_p_to_end <= dist_east_p_to_end
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then
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starting_point = north_p
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distance = dist_north_p_to_end
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elseif dist_south_p_to_end <= dist_north_p_to_end and
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dist_south_p_to_end <= dist_west_p_to_end and
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dist_south_p_to_end <= dist_east_p_to_end
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then
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starting_point = south_p
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distance = dist_south_p_to_end
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elseif dist_west_p_to_end <= dist_north_p_to_end and
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dist_west_p_to_end <= dist_south_p_to_end and
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dist_west_p_to_end <= dist_east_p_to_end
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then
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starting_point = west_p
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distance = dist_west_p_to_end
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elseif dist_east_p_to_end <= dist_north_p_to_end and
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dist_east_p_to_end <= dist_south_p_to_end and
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dist_east_p_to_end <= dist_west_p_to_end
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then
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starting_point = east_p
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distance = dist_east_p_to_end
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end
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-- find surface of new starting point
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local surface_point, surface_mat = settlements.find_surface(starting_point)
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-- replace surface node with mcl_core:grass_path
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if surface_point
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then
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if surface_mat == "mcl_core:sand" or surface_mat == "mcl_core:redsand" then
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minetest.swap_node(surface_point,{name="mcl_core:sandstonesmooth2"})
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else
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minetest.swap_node(surface_point,{name="mcl_core:grass_path"})
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end
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-- don't set y coordinate, surface might be too low or high
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starting_point.x = surface_point.x
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starting_point.z = surface_point.z
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end
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if distance <= 1 or
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starting_point == end_point
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then
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break
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end
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end
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end
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end
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end
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