86 lines
2.5 KiB
Lua
86 lines
2.5 KiB
Lua
--[[
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TechAge
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=======
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Copyright (C) 2019-2020 Joachim Stolberg
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AGPL v3
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See LICENSE.txt for more information
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Wind turbine helper function
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]]--
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local S = techage.S
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local P = minetest.string_to_pos
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local M = minetest.get_meta
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local function chat_message(player_name, msg)
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if player_name then
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minetest.chat_send_player(player_name, S("[TA4 Wind Turbine]").." "..msg)
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end
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end
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-- num_turbines is the mx number of valid wind turbines. In the case of a tool
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-- it should be 0, in case of the rotor: 1
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function techage.valid_place_for_windturbine(pos, player_name, num_turbines)
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local pos1, pos2, num
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-- Check if occean (only for tool)
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if num_turbines == 0 and pos.y ~= 1 then
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chat_message(player_name, S("This is not the surface of the ocean!"))
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return false
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end
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local node = minetest.get_node(pos)
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if num_turbines == 0 and node.name ~= "default:water_source" then
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chat_message(player_name, S("This is no ocean water!"))
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return false
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end
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local data = minetest.get_biome_data({x=pos.x, y=-2, z=pos.z})
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if data then
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local name = minetest.get_biome_name(data.biome)
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if not string.find(name, "ocean") then
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chat_message(player_name, S("This is a").." "..name.." "..S("biome and no ocean!"))
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return false
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end
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end
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-- check the space over ocean
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pos1 = {x=pos.x-20, y=2, z=pos.z-20}
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pos2 = {x=pos.x+20, y=22, z=pos.z+20}
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num = #minetest.find_nodes_in_area(pos1, pos2, {"air", "ignore"})
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if num < (41 * 41 * 21 * 0.9) then
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techage.mark_region(player_name, pos1, pos2, "")
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chat_message(player_name,
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S("Here is not enough wind (A free air space of 41x41x21 m is necessary)!"))
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return false
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end
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-- Check for water surface (occean)
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pos1 = {x=pos.x-20, y=1, z=pos.z-20}
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pos2 = {x=pos.x+20, y=1, z=pos.z+20}
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num = #minetest.find_nodes_in_area(pos1, pos2,
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{"default:water_source", "default:water_flowing", "ignore"})
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if num < (41*41 * 0.8) then
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techage.mark_region(player_name, pos1, pos2, "")
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chat_message(player_name, S("Here is not enough water (41x41 m)!"))
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return false
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end
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-- Check for next wind turbine
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pos1 = {x=pos.x-13, y=2, z=pos.z-13}
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pos2 = {x=pos.x+13, y=22, z=pos.z+13}
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num = #minetest.find_nodes_in_area(pos1, pos2, {"techage:ta4_wind_turbine"})
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if num > num_turbines then
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techage.mark_region(player_name, pos1, pos2, "")
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chat_message(player_name, S("The next wind turbines is too close!"))
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return false
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end
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if num_turbines == 0 then
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chat_message(player_name, minetest.pos_to_string(pos).." "..
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S("is a suitable place for a wind turbine!"))
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end
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return true
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end
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