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-rw-r--r--mesecons_movestones/init.lua156
1 files changed, 156 insertions, 0 deletions
diff --git a/mesecons_movestones/init.lua b/mesecons_movestones/init.lua
new file mode 100644
index 0000000..52a5605
--- /dev/null
+++ b/mesecons_movestones/init.lua
@@ -0,0 +1,156 @@
+-- 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")