mesecons/mesecons_pistons/init.lua

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--PISTONS
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-- Get mesecon rules of pistons
piston_rules =
{{x=0, y=0, z=1}, --everything apart from z- (pusher side)
{x=1, y=0, z=0},
{x=-1, y=0, z=0},
{x=1, y=1, z=0},
{x=1, y=-1, z=0},
{x=-1, y=1, z=0},
{x=-1, y=-1, z=0},
{x=0, y=1, z=1},
{x=0, y=-1, z=1}}
local piston_get_rules = function (node)
local rules = piston_rules
for i = 1, node.param2 do
rules = mesecon:rotate_rules_left(rules)
end
return rules
end
--starts the timer to make the piston update to its new state
local update = function(pos, node)
local timer = minetest.env:get_node_timer(pos)
timer:stop()
timer:start(0)
end
--on_destruct callback, removes the piston pusher if it is present
local destruct = function(pos, oldnode)
local dir = mesecon:piston_get_direction(oldnode)
pos.x, pos.y, pos.z = pos.x + dir.x, pos.y + dir.y, pos.z + dir.z --move to first node to check
--ensure piston is extended
local checknode = minetest.env:get_node(pos)
if checknode.name == "mesecons_pistons:piston_pusher_normal"
or checknode.name == "mesecons_pistons:piston_pusher_sticky" then
if checknode.param2 == oldnode.param2 then --pusher is facing the same direction as the piston
minetest.env:remove_node(pos) --remove the pusher
end
elseif oldnode.name == "mesecons_pistons:piston_up_normal" or oldnode.name == "mesecons_pistons:piston_up_sticky" then
if checknode.name == "mesecons_pistons:piston_up_pusher_normal" or checknode.name == "mesecons_pistons:piston_up_pusher_sticky" then
minetest.env:remove_node(pos) --remove the pusher
end
elseif oldnode.name == "mesecons_pistons:piston_down_normal" or oldnode.name == "mesecons_pistons:piston_down_sticky" then
if checknode.name == "mesecons_pistons:piston_down_pusher_normal" or checknode.name == "mesecons_pistons:piston_down_pusher_sticky" then
minetest.env:remove_node(pos) --remove the pusher
end
end
end
--node timer callback, pushes/pulls the piston depending on whether it is powered
local timer = function(pos, elapsed)
if mesecon:is_powered(pos) then
mesecon:piston_push(pos)
else
mesecon:piston_pull(pos)
end
return false
end
--piston push action
function mesecon:piston_push(pos)
local node = minetest.env:get_node(pos)
local dir = mesecon:piston_get_direction(node)
pos = mesecon:addPosRule(pos, dir) --move to first node being pushed
--determine the number of nodes that need to be pushed
local count = 0
local checkpos = {x=pos.x, y=pos.y, z=pos.z} --first node being pushed
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while true do
local checknode = minetest.env:get_node(checkpos)
--check for collision with stopper or bounds
if mesecon:is_mvps_stopper(checknode.name) or checknode.name == "ignore" then
return
end
--check for column end
if checknode.name == "air"
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or not(minetest.registered_nodes[checknode.name].liquidtype == "none") then
break
end
--limit piston pushing capacity
count = count + 1
if count > 15 then
return
end
checkpos = mesecon:addPosRule(checkpos, dir)
end
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local thisnode = minetest.env:get_node(pos)
minetest.env:remove_node(pos)
mesecon.on_dignode(pos, thisnode)
local nextnode
--add pusher
if node.name == "mesecons_pistons:piston_normal" then
minetest.env:add_node(pos, {name="mesecons_pistons:piston_pusher_normal", param2=node.param2})
elseif node.name == "mesecons_pistons:piston_sticky" then
minetest.env:add_node(pos, {name="mesecons_pistons:piston_pusher_sticky", param2=node.param2})
elseif node.name == "mesecons_pistons:piston_up_normal" then
minetest.env:add_node(pos, {name="mesecons_pistons:piston_up_pusher_normal"})
elseif node.name == "mesecons_pistons:piston_up_sticky" then
minetest.env:add_node(pos, {name="mesecons_pistons:piston_up_pusher_sticky"})
elseif node.name == "mesecons_pistons:piston_down_normal" then
minetest.env:add_node(pos, {name="mesecons_pistons:piston_down_pusher_normal"})
elseif node.name == "mesecons_pistons:piston_down_sticky" then
minetest.env:add_node(pos, {name="mesecons_pistons:piston_down_pusher_sticky"})
end
--move nodes forward
for i = 1, count do
pos = mesecon:addPosRule(pos, dir) --move to the next node
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nextnode = minetest.env:get_node(pos)
minetest.env:remove_node(pos)
mesecon.on_dignode(pos, thisnode)
minetest.env:add_node(pos, thisnode)
mesecon.on_placenode(pos, thisnode)
thisnode = nextnode
nodeupdate(pos)
end
end
--piston pull action
function mesecon:piston_pull(pos)
local node = minetest.env:get_node(pos)
local dir = mesecon:piston_get_direction(node)
pos = {x=pos.x + dir.x, y=pos.y + dir.y, z=pos.z + dir.z} --move to first node being replaced
--ensure piston is extended
local checknode = minetest.env:get_node(pos)
if node.name == "mesecons_pistons:piston_up_normal" or node.name == "mesecons_pistons:piston_up_sticky" then --up piston
if checknode.name ~= "mesecons_pistons:piston_up_pusher_normal" and checknode.name ~= "mesecons_pistons:piston_up_pusher_sticky" then
return --piston is not extended
end
elseif node.name == "mesecons_pistons:piston_down_normal" or node.name == "mesecons_pistons:piston_down_sticky" then --down piston
if checknode.name ~= "mesecons_pistons:piston_down_pusher_normal" and checknode.name ~= "mesecons_pistons:piston_down_pusher_sticky" then
return --piston is not extended
end
else --horizontal piston
if checknode.name ~= "mesecons_pistons:piston_pusher_normal" and checknode.name ~= "mesecons_pistons:piston_pusher_sticky" then
return --piston is not extended
end
if checknode.param2 ~= node.param2 then --pusher is not facing the same direction as the piston
return --piston is not extended
end
end
--retract piston
minetest.env:remove_node(pos) --remove pusher
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if minetest.registered_nodes[node.name].is_sticky_piston then --retract block if piston is sticky
local retractpos = mesecon:addPosRule(pos, dir) --move to the node to be retracted
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local retractnode = minetest.env:get_node(retractpos)
if minetest.registered_nodes[retractnode.name].liquidtype == "none"
and not mesecon:is_mvps_stopper(retractnode.name) then
mesecon:move_node(retractpos, pos)
mesecon.on_dignode(retractpos, retractnode)
mesecon.on_placenode(pos, retractnode)
nodeupdate(pos)
end
end
end
--push direction of a piston
function mesecon:piston_get_direction(node)
if node.name == "mesecons_pistons:piston_up_normal" or node.name == "mesecons_pistons:piston_up_sticky" then
return {x=0, y=1, z=0}
elseif node.name == "mesecons_pistons:piston_down_normal" or node.name == "mesecons_pistons:piston_down_sticky" then
return {x=0, y=-1, z=0}
elseif node.param2 == 3 then
return {x=1, y=0, z=0}
elseif node.param2 == 2 then
return {x=0, y=0, z=1}
elseif node.param2 == 1 then
return {x=-1, y=0, z=0}
else --node.param2 == 0
return {x=0, y=0, z=-1}
end
end
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--horizontal pistons
minetest.register_node("mesecons_pistons:piston_normal", {
description = "Piston",
tiles = {"jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_side.png"},
groups = {cracky=3, mesecon=2},
paramtype2 = "facedir",
after_destruct = destruct,
on_timer = timer,
after_place_node = function(pos, placer)
if not placer then --not placed by player
return
end
local pitch = placer:get_look_pitch() * (180 / math.pi) --placer pitch in degrees
if pitch > 45 then --looking upwards
minetest.env:add_node(pos, {name="mesecons_pistons:piston_down_normal"})
elseif pitch < -45 then --looking downwards
minetest.env:add_node(pos, {name="mesecons_pistons:piston_up_normal"})
end
end,
mesecons = {effector={
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action_change = update,
rules = piston_get_rules
}}
})
minetest.register_node("mesecons_pistons:piston_sticky", {
description = "Sticky Piston",
tiles = {"jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_sticky_side.png"},
groups = {cracky=3, mesecon=2},
paramtype2 = "facedir",
after_destruct = destruct,
on_timer = timer,
is_sticky_piston = true,
after_place_node = function(pos, placer)
if not placer then --not placed by player
return
end
local pitch = placer:get_look_pitch() * (180 / math.pi) --placer pitch in degrees
if pitch > 45 then --looking upwards
minetest.env:add_node(pos, {name="mesecons_pistons:piston_down_sticky"})
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elseif pitch < -45 then --looking downwards
minetest.env:add_node(pos, {name="mesecons_pistons:piston_up_sticky"})
end
end,
mesecons = {effector={
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action_change = update,
rules = piston_get_rules
}}
})
minetest.register_node("mesecons_pistons:piston_pusher_normal", {
drawtype = "nodebox",
tiles = {"jeija_piston_pusher_normal.png"},
paramtype = "light",
paramtype2 = "facedir",
diggable = false,
selection_box = {
type = "fixed",
fixed = {
{-0.2, -0.2, -0.3, 0.2, 0.2, 0.5},
{-0.5, -0.5, -0.5, 0.5, 0.5, -0.3},
},
},
node_box = {
type = "fixed",
fixed = {
{-0.2, -0.2, -0.3, 0.2, 0.2, 0.5},
{-0.5, -0.5, -0.5, 0.5, 0.5, -0.3},
},
},
})
minetest.register_node("mesecons_pistons:piston_pusher_sticky", {
drawtype = "nodebox",
tiles = {
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_sticky.png"
},
paramtype = "light",
paramtype2 = "facedir",
diggable = false,
selection_box = {
type = "fixed",
fixed = {
{-0.2, -0.2, -0.3, 0.2, 0.2, 0.5},
{-0.5, -0.5, -0.5, 0.5, 0.5, -0.3},
},
},
node_box = {
type = "fixed",
fixed = {
{-0.2, -0.2, -0.3, 0.2, 0.2, 0.5},
{-0.5, -0.5, -0.5, 0.5, 0.5, -0.3},
},
},
})
mesecon:register_mvps_stopper("mesecons_pistons:piston_pusher_normal")
mesecon:register_mvps_stopper("mesecons_pistons:piston_pusher_sticky")
--up pistons
minetest.register_node("mesecons_pistons:piston_up_normal", {
tiles = {"jeija_piston_side.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png"},
groups = {cracky=3, mesecon=2},
after_destruct = destruct,
on_timer = timer,
mesecons = {effector={
action_change = update
}},
drop = "mesecons_pistons:piston_normal",
})
minetest.register_node("mesecons_pistons:piston_up_sticky", {
tiles = {"jeija_piston_sticky_side.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png"},
groups = {cracky=3, mesecon=2},
after_destruct = destruct,
on_timer = timer,
is_sticky_piston = true,
mesecons = {effector={
action_change = update
}},
drop = "mesecons_pistons:piston_sticky",
})
minetest.register_node("mesecons_pistons:piston_up_pusher_normal", {
drawtype = "nodebox",
tiles = {"jeija_piston_pusher_normal.png"},
paramtype = "light",
diggable = false,
selection_box = {
type = "fixed",
fixed = {
{-0.2, -0.5, -0.2, 0.2, 0.3, 0.2},
{-0.5, 0.3, -0.5, 0.5, 0.5, 0.5},
},
},
node_box = {
type = "fixed",
fixed = {
{-0.2, -0.5, -0.2, 0.2, 0.3, 0.2},
{-0.5, 0.3, -0.5, 0.5, 0.5, 0.5},
},
},
})
minetest.register_node("mesecons_pistons:piston_up_pusher_sticky", {
drawtype = "nodebox",
tiles = {
"jeija_piston_pusher_sticky.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png"
},
paramtype = "light",
diggable = false,
selection_box = {
type = "fixed",
fixed = {
{-0.2, -0.5, -0.2, 0.2, 0.3, 0.2},
{-0.5, 0.3, -0.5, 0.5, 0.5, 0.5},
},
},
node_box = {
type = "fixed",
fixed = {
{-0.2, -0.5, -0.2, 0.2, 0.3, 0.2},
{-0.5, 0.3, -0.5, 0.5, 0.5, 0.5},
},
},
})
mesecon:register_mvps_stopper("mesecons_pistons:piston_up_pusher_normal")
mesecon:register_mvps_stopper("mesecons_pistons:piston_up_pusher_sticky")
--down pistons
minetest.register_node("mesecons_pistons:piston_down_normal", {
tiles = {"jeija_piston_tb.png", "jeija_piston_side.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png"},
groups = {cracky=3, mesecon=2},
after_destruct = destruct,
on_timer = timer,
mesecons = {effector={
action_change = update
}},
drop = "mesecons_pistons:piston_normal",
})
minetest.register_node("mesecons_pistons:piston_down_sticky", {
tiles = {"jeija_piston_tb.png", "jeija_piston_sticky_side.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png", "jeija_piston_tb.png"},
groups = {cracky=3, mesecon=2},
after_destruct = destruct,
on_timer = timer,
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is_sticky_piston = true,
mesecons = {effector={
action_change = update
}},
drop = "mesecons_pistons:piston_sticky",
})
minetest.register_node("mesecons_pistons:piston_down_pusher_normal", {
drawtype = "nodebox",
tiles = {"jeija_piston_pusher_normal.png"},
paramtype = "light",
diggable = false,
selection_box = {
type = "fixed",
fixed = {
{-0.2, -0.3, -0.2, 0.2, 0.5, 0.2},
{-0.5, -0.5, -0.5, 0.5, -0.3, 0.5},
},
},
node_box = {
type = "fixed",
fixed = {
{-0.2, -0.3, -0.2, 0.2, 0.5, 0.2},
{-0.5, -0.5, -0.5, 0.5, -0.3, 0.5},
},
},
})
minetest.register_node("mesecons_pistons:piston_down_pusher_sticky", {
drawtype = "nodebox",
tiles = {
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_sticky.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png",
"jeija_piston_pusher_normal.png"
},
paramtype = "light",
diggable = false,
selection_box = {
type = "fixed",
fixed = {
{-0.2, -0.3, -0.2, 0.2, 0.5, 0.2},
{-0.5, -0.5, -0.5, 0.5, -0.3, 0.5},
},
},
node_box = {
type = "fixed",
fixed = {
{-0.2, -0.3, -0.2, 0.2, 0.5, 0.2},
{-0.5, -0.5, -0.5, 0.5, -0.3, 0.5},
},
},
})
mesecon:register_mvps_stopper("mesecons_pistons:piston_down_pusher_normal")
mesecon:register_mvps_stopper("mesecons_pistons:piston_down_pusher_sticky")
--craft recipes
minetest.register_craft({
output = '"mesecons_pistons:piston_normal" 2',
recipe = {
{"default:wood", "default:wood", "default:wood"},
{"default:cobble", "default:steel_ingot", "default:cobble"},
{"default:cobble", "group:mesecon_conductor_craftable", "default:cobble"},
}
})
minetest.register_craft({
output = "mesecons_pistons:piston_sticky",
recipe = {
{"mesecons_materials:glue"},
{"mesecons_pistons:piston_normal"},
}
})