minetest-mm/mods/ropes/functions.lua

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2020-10-25 19:05:08 +01:00
ropes.can_place_rope_in_node = function(target_node_name)
if ropes.can_extend_into_nodes[target_node_name] == true then
return true
end
local target_def = minetest.registered_nodes[target_node_name]
if target_def then
if target_def.drawtype == "airlike" and ropes.can_extend_into_airlike then
return true
end
if target_def.groups and target_def.groups.ropes_can_extend_into then
return true
end
end
return false
end
ropes.make_rope_on_timer = function(rope_node_name)
return function(pos, elapsed)
local currentend = minetest.get_node(pos)
local currentmeta = minetest.get_meta(pos)
local currentlength = currentmeta:get_int("length_remaining")
local placer_name = currentmeta:get_string("placer")
local newpos = {x=pos.x, y=pos.y-1, z=pos.z}
local newnode = minetest.get_node(newpos)
local oldnode = minetest.get_node(pos)
if currentlength > 1 and (not minetest.is_protected(newpos, placer_name)
or minetest.check_player_privs(placer_name, "protection_bypass")) then
if ropes.can_place_rope_in_node(newnode.name) then
minetest.add_node(newpos, {name=currentend.name, param2=oldnode.param2})
local newmeta = minetest.get_meta(newpos)
newmeta:set_int("length_remaining", currentlength-1)
newmeta:set_string("placer", placer_name)
minetest.set_node(pos, {name=rope_node_name, param2=oldnode.param2})
ropes.move_players_down(pos, 1)
else
local timer = minetest.get_node_timer( pos )
timer:start( 1 )
end
end
end
end
local data = {}
local c_air = minetest.get_content_id("air")
ropes.destroy_rope = function(pos, nodes)
local top = pos.y
local bottom = pos.y-15
local voxel_manip = minetest.get_voxel_manip()
local finished = false
local ids_to_destroy = {}
for _, node in pairs(nodes) do
if minetest.registered_nodes[node] then
ids_to_destroy[minetest.get_content_id(node)] = true
end
end
while not finished do
local emin, emax = voxel_manip:read_from_map({x=pos.x, y=bottom, z=pos.z}, {x=pos.x, y=top, z=pos.z})
voxel_manip:get_data(data)
local voxel_area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
bottom = emin.y
for y = top, bottom, -1 do
local index = voxel_area:index(pos.x, y, pos.z)
if ids_to_destroy[data[index]] then
data[index] = c_air
else
finished = true
break
end
end
voxel_manip:set_data(data)
voxel_manip:write_to_map()
voxel_manip:update_map()
top = bottom - 1
bottom = bottom - 15
end
end
ropes.hanging_after_destruct = function(pos, top_node, middle_node, bottom_node)
local node = minetest.get_node(pos)
if node.name == top_node or node.name == middle_node or node.name == bottom_node then
return -- this was done by another ladder or rope node changing this one, don't react
end
pos.y = pos.y + 1 -- one up
local node_above = minetest.get_node(pos)
if node_above.name == middle_node then
minetest.swap_node(pos, {name=bottom_node, param2=node_above.param2})
end
pos.y = pos.y - 2 -- one down
local node_below = minetest.get_node(pos)
if node_below.name == middle_node then
ropes.destroy_rope(pos, {middle_node, bottom_node})
elseif node_below.name == bottom_node then
minetest.swap_node(pos, {name="air"})
end
end
ropes.move_players_down = function(pos, radius)
local all_objects = minetest.get_objects_inside_radius({x=pos.x, y=pos.y+radius, z=pos.z}, radius)
local players = {}
local _,obj
for _,obj in pairs(all_objects) do
if obj:is_player() then
local obj_pos = obj:getpos()
if math.abs(obj_pos.x-pos.x) < 0.5 and math.abs(obj_pos.z-pos.z) < 0.5 then
obj:moveto({x=obj_pos.x, y=obj_pos.y-1, z=obj_pos.z}, true)
end
end
end
end