minetest-mods/mesecons
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Code Issues Releases Wiki Activity

Use FIFO queue for mvps

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This commit is contained in:
Jude Melton-Houghton 2022-03-01 17:44:30 -05:00
parent 0d9e0274ae
commit 91be917fe9
2 changed files with 21 additions and 37 deletions
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7
mesecons/internal.lua
View File

@ -46,7 +46,8 @@
-- mesecon.rotate_rules_down(rules)
-- These functions return rules that have been rotated in the specific direction
local fifo_queue = dofile(minetest.get_modpath("mesecons").."/fifo_queue.lua")
-- See fifo_queue.lua for documentation.
mesecon.fifo_queue = dofile(minetest.get_modpath("mesecons").."/fifo_queue.lua")
-- General
function mesecon.get_effector(nodename)
@ -421,7 +422,7 @@ end
function mesecon.turnon(pos, link)
find_light_update_conductors()
local frontiers = fifo_queue.new()
local frontiers = mesecon.fifo_queue.new()
frontiers:add({pos = pos, link = link})
local pos_can_be_skipped = {}
@ -484,7 +485,7 @@ end
function mesecon.turnoff(pos, link)
find_light_update_conductors()
local frontiers = fifo_queue.new()
local frontiers = mesecon.fifo_queue.new()
frontiers:add({pos = pos, link = link})
local signals = {}
local pos_can_be_skipped = {}

51
mesecons_mvps/init.lua
View File

@ -63,28 +63,31 @@ end
function mesecon.mvps_get_stack(pos, dir, maximum, all_pull_sticky)
-- determine the number of nodes to be pushed
local nodes = {}
local frontiers = {pos}
local pos_set = {}
local frontiers = mesecon.fifo_queue.new()
frontiers:add(pos)
while #frontiers > 0 do
local np = frontiers[1]
local nn = minetest.get_node(np)
if not node_replaceable(nn.name) then
for np in frontiers:iter() do
local np_hash = minetest.hash_node_position(np)
local nn = not pos_set[np_hash] and minetest.get_node(np)
if nn and not node_replaceable(nn.name) then
pos_set[np_hash] = true
table.insert(nodes, {node = nn, pos = np})
if #nodes > maximum then return nil end
-- add connected nodes to frontiers, connected is a vector list
-- the vectors must be absolute positions
local connected = {}
-- add connected nodes to frontiers
if minetest.registered_nodes[nn.name]
and minetest.registered_nodes[nn.name].mvps_sticky then
connected = minetest.registered_nodes[nn.name].mvps_sticky(np, nn)
local connected = minetest.registered_nodes[nn.name].mvps_sticky(np, nn)
for _, cp in ipairs(connected) do
frontiers:add(cp)
end
end
table.insert(connected, vector.add(np, dir))
frontiers:add(vector.add(np, dir))
-- If adjacent node is sticky block and connects add that
-- position to the connected table
-- position
for _, r in ipairs(mesecon.rules.alldirs) do
local adjpos = vector.add(np, r)
local adjnode = minetest.get_node(adjpos)
@ -96,36 +99,16 @@ function mesecon.mvps_get_stack(pos, dir, maximum, all_pull_sticky)
-- connects to this position?
for _, link in ipairs(sticksto) do
if vector.equals(link, np) then
table.insert(connected, adjpos)
frontiers:add(adjpos)
end
end
end
end
if all_pull_sticky then
table.insert(connected, vector.subtract(np, dir))
end
-- Make sure there are no duplicates in frontiers / nodes before
-- adding nodes in "connected" to frontiers
for _, cp in ipairs(connected) do
local duplicate = false
for _, rp in ipairs(nodes) do
if vector.equals(cp, rp.pos) then
duplicate = true
frontiers:add(vector.subtract(np, dir))
end
end
for _, fp in ipairs(frontiers) do
if vector.equals(cp, fp) then
duplicate = true
end
end
if not duplicate then
table.insert(frontiers, cp)
end
end
end
table.remove(frontiers, 1)
end
return nodes