forked from Mirrorlandia_minetest/mesecons
Add support for sticky blocks for pistons and a a sample sticky block
This commit is contained in:
Jeija
parent
aa5538a734
commit
a6d0a523ba
@ -30,6 +30,14 @@ mesecon.rules.flat =
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{x =-1, y = 0, z = 0},
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{x = 0, y = 0, z = 1},
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{x = 0, y = 0, z =-1}}
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mesecon.rules.alldirs =
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{{x= 1, y= 0, z= 0},
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{x=-1, y= 0, z= 0},
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{x= 0, y= 1, z= 0},
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{x= 0, y=-1, z= 0},
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{x= 0, y= 0, z= 1},
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{x= 0, y= 0, z=-1}}
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mesecon.rules.buttonlike_get = function(node)
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local rules = mesecon.rules.buttonlike
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@ -19,7 +19,6 @@ function mesecon.is_mvps_stopper(node, pushdir, stack, stackid)
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if type (get_stopper) == "function" then
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get_stopper = get_stopper(node, pushdir, stack, stackid)
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end
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if (get_stopper) then print(node.name) end
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return get_stopper
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end
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@ -48,27 +47,76 @@ function mesecon.mvps_process_stack(stack)
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end
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end
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function mesecon.mvps_get_stack(pos, dir, maximum)
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function mesecon.mvps_get_stack(pos, dir, maximum, all_pull_sticky)
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-- determine the number of nodes to be pushed
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local np = {x = pos.x, y = pos.y, z = pos.z}
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local nodes = {}
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while true do
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local nn = minetest.get_node_or_nil(np)
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if not nn or #nodes > maximum then
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-- don't push at all, something is in the way (unloaded map or too many nodes)
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return nil
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local frontiers = {pos}
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while #frontiers > 0 do
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local np = frontiers[1]
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local nn = minetest.get_node(np)
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if nn.name ~= "air"
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and minetest.registered_nodes[nn.name]
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and minetest.registered_nodes[nn.name].liquidtype == "none" then
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table.insert(nodes, {node = nn, pos = np})
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if #nodes > maximum then return nil end
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-- add connected nodes to frontiers, connected is a vector list
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-- the vectors must be absolute positions
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local connected = {}
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if minetest.registered_nodes[nn.name]
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and minetest.registered_nodes[nn.name].mvps_sticky then
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connected = minetest.registered_nodes[nn.name].mvps_sticky(np, nn)
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end
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table.insert(connected, vector.add(np, dir))
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-- If adjacent node is sticky block and connects add that
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-- position to the connected table
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for _, r in ipairs(mesecon.rules.alldirs) do
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local adjpos = vector.add(np, r)
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local adjnode = minetest.get_node(adjpos)
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if minetest.registered_nodes[adjnode.name]
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and minetest.registered_nodes[adjnode.name].mvps_sticky then
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local sticksto = minetest.registered_nodes[adjnode.name]
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.mvps_sticky(adjpos, adjnode)
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-- connects to this position?
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for _, link in ipairs(sticksto) do
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if vector.equals(link, np) then
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table.insert(connected, adjpos)
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end
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end
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end
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end
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if all_pull_sticky then
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table.insert(connected, vector.subtract(np, dir))
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end
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-- Make sure there are no duplicates in frontiers / nodes before
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-- adding nodes in "connected" to frontiers
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for _, cp in ipairs(connected) do
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local duplicate = false
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for _, rp in ipairs(nodes) do
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if vector.equals(cp, rp.pos) then
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duplicate = true
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end
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end
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for _, fp in ipairs(frontiers) do
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if vector.equals(cp, fp) then
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duplicate = true
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end
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end
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if not duplicate then
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table.insert(frontiers, cp)
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end
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end
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end
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if nn.name == "air"
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or (minetest.registered_nodes[nn.name]
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and minetest.registered_nodes[nn.name].liquidtype ~= "none") then --is liquid
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break
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end
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table.insert (nodes, {node = nn, pos = np})
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np = mesecon.addPosRule(np, dir)
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table.remove(frontiers, 1)
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end
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return nodes
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end
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@ -77,11 +125,19 @@ function mesecon.mvps_push(pos, dir, maximum)
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end
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function mesecon.mvps_pull_all(pos, dir, maximum)
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return mesecon.mvps_push_or_pull(pos, vector.multiply(dir, -1), dir, maximum, true)
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end
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function mesecon.mvps_pull_single(pos, dir, maximum)
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return mesecon.mvps_push_or_pull(pos, vector.multiply(dir, -1), dir, maximum)
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end
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function mesecon.mvps_push_or_pull(pos, stackdir, movedir, maximum) -- pos: pos of mvps; stackdir: direction of building the stack; movedir: direction of actual movement; maximum: maximum nodes to be pushed
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local nodes = mesecon.mvps_get_stack(pos, stackdir, maximum)
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-- pos: pos of mvps; stackdir: direction of building the stack
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-- movedir: direction of actual movement
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-- maximum: maximum nodes to be pushed
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-- all_pull_sticky: All nodes are sticky in the direction that they are pulled from
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function mesecon.mvps_push_or_pull(pos, stackdir, movedir, maximum, all_pull_sticky)
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local nodes = mesecon.mvps_get_stack(pos, movedir, maximum, all_pull_sticky)
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if not nodes then return end
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-- determine if one of the nodes blocks the push / pull
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@ -133,27 +189,6 @@ mesecon.register_on_mvps_move(function(moved_nodes)
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end
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end)
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function mesecon.mvps_pull_single(pos, dir) -- pos: pos of mvps; direction: direction of pull (matches push direction for sticky pistons)
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local np = mesecon.addPosRule(pos, dir)
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local nn = minetest.get_node(np)
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if ((not minetest.registered_nodes[nn.name]) --unregistered node
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or minetest.registered_nodes[nn.name].liquidtype == "none") --non-liquid node
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and not mesecon.is_mvps_stopper(nn, dir, {{pos = np, node = nn}}, 1) then --non-stopper node
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local meta = minetest.get_meta(np):to_table()
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minetest.remove_node(np)
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minetest.add_node(pos, nn)
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minetest.get_meta(pos):from_table(meta)
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nodeupdate(np)
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nodeupdate(pos)
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mesecon.on_dignode(np, nn)
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mesecon.update_autoconnect(np)
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on_mvps_move({{pos = pos, oldpos = np, node = nn, meta = meta}})
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end
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return {{pos = np, node = {param2 = 0, name = "air"}}, {pos = pos, node = nn}}
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end
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function mesecon.mvps_move_objects(pos, dir, nodestack)
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local objects_to_move = {}
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@ -100,9 +100,10 @@ local piston_off = function(pos, node)
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piston_remove_pusher(pos, node)
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if pistonspec.sticky then
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local maxpull = mesecon.setting("piston_max_pull", 15)
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local dir = piston_get_direction(pistonspec.dir, node)
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local pullpos = mesecon.addPosRule(pos, dir)
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local stack = mesecon.mvps_pull_single(pullpos, dir)
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local pullpos = vector.add(pos, vector.multiply(dir, 2))
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local stack = mesecon.mvps_pull_single(pullpos, vector.multiply(dir, -1), maxpull)
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mesecon.mvps_process_stack(pos, dir, stack)
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end
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end
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2
mesecons_stickyblocks/depends.txt
Normal file
2
mesecons_stickyblocks/depends.txt
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@ -0,0 +1,2 @@
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mesecons
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mesecons_mvps
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16
mesecons_stickyblocks/init.lua
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16
mesecons_stickyblocks/init.lua
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@ -0,0 +1,16 @@
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-- Sticky blocks can be used together with pistons or movestones to push / pull
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-- structures that are "glued" together using sticky blocks
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-- All sides sticky block
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minetest.register_node("mesecons_stickyblocks:sticky_block_all", {
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description = "All-sides sticky block",
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tiles = {"default_grass_footsteps.png"},
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groups = {dig_immediate=2},
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mvps_sticky = function (pos, node)
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local connected = {}
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for _, r in ipairs(mesecon.rules.alldirs) do
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table.insert(connected, vector.add(pos, r))
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end
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return connected
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end
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})
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