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-- MOVESTONE
-- Non-sticky:
-- Moves along mesecon lines
-- Pushes all blocks in front of it
--
-- Sticky one
-- Moves along mesecon lines
-- Pushes all block in front of it
-- Pull all blocks in its back
function mesecon.get_movestone_direction(pos)
local lpos
local rules = {
{x=0, y=1, z=-1},
{x=0, y=0, z=-1},
{x=0, y=-1, z=-1},
{x=0, y=1, z=1},
{x=0, y=-1, z=1},
{x=0, y=0, z=1},
{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=-1, y=0, z=0}}
lpos = {x=pos.x+1, y=pos.y, z=pos.z}
for n = 1, 3 do
if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
return {x=0, y=0, z=-1}
end
end
lpos = {x = pos.x-1, y = pos.y, z = pos.z}
for n=4, 6 do
if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
return {x=0, y=0, z=1}
end
end
lpos = {x = pos.x, y = pos.y, z = pos.z+1}
for n=7, 9 do
if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
return {x=-1, y=0, z=0}
end
end
lpos = {x = pos.x, y = pos.y, z = pos.z-1}
for n=10, 12 do
if mesecon.is_power_on(lpos, rules[n].x, rules[n].y, rules[n].z) then
return {x=1, y=0, z=0}
end
end
end
function mesecon.register_movestone(name, def, is_sticky)
local timer_interval = 1 / mesecon.setting("movestone_speed", 3)
local name_active = name.."_active"
local function movestone_move (pos)
if minetest.get_node(pos).name ~= name_active then
return
end
local direction = mesecon.get_movestone_direction(pos)
if not direction then
minetest.set_node(pos, {name = name})
return
end
local frontpos = vector.add(pos, direction)
local backpos = vector.subtract(pos, direction)
-- ### Step 1: Push nodes in front ###
local maxpush = mesecon.setting("movestone_max_push", 50)
local maxpull = mesecon.setting("movestone_max_pull", 50)
local success, stack, oldstack = mesecon.mvps_push(frontpos, direction, maxpush)
if success then
mesecon.mvps_process_stack(stack)
mesecon.mvps_move_objects(frontpos, direction, oldstack)
-- Too large stack/stopper in the way: try again very soon
else
minetest.after(0.05, movestone_move, pos)
return
end
-- ### Step 2: Move the movestone ###
local node = minetest.get_node(pos)
minetest.set_node(frontpos, node)
minetest.remove_node(pos)
mesecon.on_dignode(pos, node)
mesecon.on_placenode(frontpos, node)
minetest.after(timer_interval, movestone_move, frontpos)
-- ### Step 3: If sticky, pull stack behind ###
if is_sticky then
mesecon.mvps_pull_all(backpos, direction, maxpull)
end
end
def.mesecons = {effector = {
action_on = function (pos)
if minetest.get_node(pos).name ~= name_active then
minetest.set_node(pos, {name = name_active})
movestone_move(pos)
end
end,
action_off = function (pos)
minetest.set_node(pos, {name = name})
end
}}
def.drop = name
minetest.register_node(name, def)
-- active node only
local def_active = table.copy(def)
def_active.groups.not_in_creative_inventory = 1
minetest.register_node(name_active, def_active)
end
mesecon.register_movestone("mesecons_movestones:movestone", {
tiles = {"jeija_movestone_side.png", "jeija_movestone_side.png", "jeija_movestone_side.png", "jeija_movestone_side.png", "jeija_movestone_arrows.png", "jeija_movestone_arrows.png"},
groups = {cracky=3},
description="Movestone",
sounds = default.node_sound_stone_defaults()
}, false)
minetest.register_craft({
output = "mesecons_movestones:movestone 2",
recipe = {
{"default:stone", "default:stone", "default:stone"},
{"group:mesecon_conductor_craftable", "group:mesecon_conductor_craftable", "group:mesecon_conductor_craftable"},
{"default:stone", "default:stone", "default:stone"},
}
})
-- STICKY_MOVESTONE
mesecon.register_movestone("mesecons_movestones:sticky_movestone", {
tiles = {"jeija_movestone_side.png", "jeija_movestone_side.png", "jeija_movestone_side.png", "jeija_movestone_side.png", "jeija_sticky_movestone.png", "jeija_sticky_movestone.png"},
inventory_image = minetest.inventorycube("jeija_sticky_movestone.png", "jeija_movestone_side.png", "jeija_movestone_side.png"),
groups = {cracky=3},
description="Sticky Movestone",
sounds = default.node_sound_stone_defaults(),
}, true)
minetest.register_craft({
output = "mesecons_movestones:sticky_movestone 2",
recipe = {
{"mesecons_materials:glue", "mesecons_movestones:movestone", "mesecons_materials:glue"},
}
})
-- Don't allow pushing movestones while they're active
mesecon.register_mvps_stopper("mesecons_movestones:movestone_active")
mesecon.register_mvps_stopper("mesecons_movestones:sticky_movestone_active")
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