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--register stoppers for movestones/pistons
mesecon.mvps_stoppers = {}
mesecon.mvps_unmov = {}
function mesecon:is_mvps_stopper(node, pushdir, stack, stackid)
local get_stopper = mesecon.mvps_stoppers[node.name]
if type (get_stopper) == "function" then
get_stopper = get_stopper(node, pushdir, stack, stackid)
end
return get_stopper
end
function mesecon:register_mvps_stopper(nodename, get_stopper)
if get_stopper == nil then
get_stopper = true
end
mesecon.mvps_stoppers[nodename] = get_stopper
end
-- Objects that cannot be moved (e.g. movestones)
function mesecon:register_mvps_unmov(objectname)
mesecon.mvps_unmov[objectname] = true;
end
function mesecon:is_mvps_unmov(objectname)
return mesecon.mvps_unmov[objectname]
end
function mesecon:mvps_process_stack(stack)
-- update mesecons for placed nodes ( has to be done after all nodes have been added )
for _, n in ipairs(stack) do
nodeupdate(n.pos)
mesecon.on_placenode(n.pos, minetest.env:get_node(n.pos))
mesecon:update_autoconnect(n.pos)
end
end
function mesecon:mvps_get_stack(pos, dir, maximum)
-- determine the number of nodes to be pushed
local np = {x = pos.x, y = pos.y, z = pos.z}
local nodes = {}
while true do
local nn = minetest.env:get_node_or_nil(np)
if not nn or #nodes > maximum then
-- don't push at all, something is in the way (unloaded map or too many nodes)
return nil
end
if nn.name == "air"
or (minetest.registered_nodes[nn.name]
and minetest.registered_nodes[nn.name].liquidtype ~= "none") then --is liquid
break
end
table.insert (nodes, {node = nn, pos = np})
np = mesecon:addPosRule(np, dir)
end
return nodes
end
function mesecon:mvps_push(pos, dir, maximum) -- pos: pos of mvps; dir: direction of push; maximum: maximum nodes to be pushed
local nodes = mesecon:mvps_get_stack(pos, dir, maximum)
if not nodes then return end
-- determine if one of the nodes blocks the push
for id, n in ipairs(nodes) do
if mesecon:is_mvps_stopper(n.node, dir, nodes, id) then
return
end
end
-- remove all nodes
for _, n in ipairs(nodes) do
n.meta = minetest.env:get_meta(n.pos):to_table()
minetest.env:remove_node(n.pos)
end
-- update mesecons for removed nodes ( has to be done after all nodes have been removed )
for _, n in ipairs(nodes) do
mesecon.on_dignode(n.pos, n.node)
mesecon:update_autoconnect(n.pos)
end
-- add nodes
for _, n in ipairs(nodes) do
np = mesecon:addPosRule(n.pos, dir)
minetest.env:add_node(np, n.node)
minetest.env:get_meta(np):from_table(n.meta)
end
local oldstack = mesecon:tablecopy(nodes)
for i in ipairs(nodes) do
nodes[i].pos = mesecon:addPosRule(nodes[i].pos, dir)
end
for _, n in ipairs(nodes) do
mesecon.on_placenode(n.pos, n.node)
mesecon:update_autoconnect(n.pos)
end
return true, nodes, oldstack
end
function mesecon:mvps_pull_single(pos, dir) -- pos: pos of mvps; direction: direction of pull (matches push direction for sticky pistons)
np = mesecon:addPosRule(pos, dir)
nn = minetest.env:get_node(np)
if ((not minetest.registered_nodes[nn.name]) --unregistered node
or minetest.registered_nodes[nn.name].liquidtype == "none") --non-liquid node
and not mesecon:is_mvps_stopper(nn, {x = -dir.x, y = -dir.y, z = -dir.z}, {{pos = np, node = nn}}, 1) then --non-stopper node
local meta = minetest.env:get_meta(np):to_table()
minetest.env:remove_node(np)
minetest.env:add_node(pos, nn)
minetest.env:get_meta(pos):from_table(meta)
nodeupdate(np)
nodeupdate(pos)
mesecon.on_dignode(np, nn)
mesecon:update_autoconnect(np)
mesecon:update_autoconnect(pos)
mesecon.on_placenode(pos, nn)
end
return {{pos = np, node = {param2 = 0, name = "air"}}, {pos = pos, node = nn}}
end
function mesecon:mvps_pull_all(pos, direction) -- pos: pos of mvps; direction: direction of pull
local lpos = {x=pos.x-direction.x, y=pos.y-direction.y, z=pos.z-direction.z} -- 1 away
local lnode = minetest.env:get_node(lpos)
local lpos2 = {x=pos.x-direction.x*2, y=pos.y-direction.y*2, z=pos.z-direction.z*2} -- 2 away
local lnode2 = minetest.env:get_node(lpos2)
--avoid pulling solid nodes
if lnode.name ~= "ignore"
and lnode.name ~= "air"
and ((not minetest.registered_nodes[lnode.name])
or minetest.registered_nodes[lnode.name].liquidtype == "none") then
return
end
--avoid pulling empty or liquid nodes
if lnode2.name == "ignore"
or lnode2.name == "air"
or (minetest.registered_nodes[lnode2.name]
and minetest.registered_nodes[lnode2.name].liquidtype ~= "none") then
return
end
local oldpos = {x=lpos2.x + direction.x, y=lpos2.y + direction.y, z=lpos2.z + direction.z}
repeat
lnode2 = minetest.env:get_node(lpos2)
minetest.env:add_node(oldpos, {name=lnode2.name})
nodeupdate(oldpos)
oldpos = {x=lpos2.x, y=lpos2.y, z=lpos2.z}
lpos2.x = lpos2.x-direction.x
lpos2.y = lpos2.y-direction.y
lpos2.z = lpos2.z-direction.z
lnode = minetest.env:get_node(lpos2)
until lnode.name == "air"
or lnode.name == "ignore"
or (minetest.registered_nodes[lnode2.name]
and minetest.registered_nodes[lnode2.name].liquidtype ~= "none")
minetest.env:remove_node(oldpos)
end
function mesecon:mvps_move_objects(pos, dir, nodestack)
local objects_to_move = {}
-- Move object at tip of stack
local pushpos = mesecon:addPosRule(pos, -- get pos at tip of stack
{x = dir.x * #nodestack,
y = dir.y * #nodestack,
z = dir.z * #nodestack})
local objects = minetest.env:get_objects_inside_radius(pushpos, 1)
for _, obj in ipairs(objects) do
table.insert(objects_to_move, obj)
end
-- Move objects lying/standing on the stack (before it was pushed - oldstack)
if tonumber(minetest.setting_get("movement_gravity")) > 0 and dir.y == 0 then
-- If gravity positive and dir horizontal, push players standing on the stack
for _, n in ipairs(nodestack) do
local p_above = mesecon:addPosRule(n.pos, {x=0, y=1, z=0})
local objects = minetest.env:get_objects_inside_radius(p_above, 1)
for _, obj in ipairs(objects) do
table.insert(objects_to_move, obj)
end
end
end
for _, obj in ipairs(objects_to_move) do
local entity = obj:get_luaentity()
if not entity or not mesecon:is_mvps_unmov(entity.name) then
local np = mesecon:addPosRule(obj:getpos(), dir)
--move only if destination is not solid
local nn = minetest.env:get_node(np)
if not ((not minetest.registered_nodes[nn.name])
or minetest.registered_nodes[nn.name].walkable) then
obj:setpos(np)
end
end
end
end
mesecon:register_mvps_stopper("default:chest_locked")
mesecon:register_mvps_stopper("default:furnace")
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