VoxeLibre/mods/redstone/mesecons/internal.lua
2015-06-29 19:55:58 +02:00

473 lines
14 KiB
Lua

-- Internal.lua - The core of mesecons
--
-- For more practical developer resources see mesecons.tk
--
-- Function overview
-- mesecon:get_effector(nodename) --> Returns the mesecons.effector -specifictation in the nodedef by the nodename
-- mesecon:get_receptor(nodename) --> Returns the mesecons.receptor -specifictation in the nodedef by the nodename
-- mesecon:get_conductor(nodename) --> Returns the mesecons.conductor-specifictation in the nodedef by the nodename
-- mesecon:get_any_inputrules (node) --> Returns the rules of a node if it is a conductor or an effector
-- mesecon:get_any_outputrules (node) --> Returns the rules of a node if it is a conductor or a receptor
-- RECEPTORS
-- mesecon:is_receptor(nodename) --> Returns true if nodename is a receptor
-- mesecon:is_receptor_on(nodename) --> Returns true if nodename is an receptor with state = mesecon.state.on
-- mesecon:is_receptor_off(nodename) --> Returns true if nodename is an receptor with state = mesecon.state.off
-- mesecon:receptor_get_rules(node) --> Returns the rules of the receptor (mesecon.rules.default if none specified)
-- EFFECTORS
-- mesecon:is_effector(nodename) --> Returns true if nodename is an effector
-- mesecon:is_effector_on(nodename) --> Returns true if nodename is an effector with nodedef.mesecons.effector.action_off
-- mesecon:is_effector_off(nodename) --> Returns true if nodename is an effector with nodedef.mesecons.effector.action_on
-- mesecon:effector_get_rules(node) --> Returns the input rules of the effector (mesecon.rules.default if none specified)
-- SIGNALS
-- mesecon:activate(pos, node) --> Activates the effector node at the specific pos (calls nodedef.mesecons.effector.action_on)
-- mesecon:deactivate(pos, node) --> Deactivates the effector node at the specific pos (calls nodedef.mesecons.effector.action_off)
-- mesecon:changesignal(pos, node, rulename, newstate) --> Changes the effector node at the specific pos (calls nodedef.mesecons.effector.action_change)
-- RULES
-- mesecon:add_rules(name, rules) | deprecated? --> Saves rules table by name
-- mesecon:get_rules(name, rules) | deprecated? --> Loads rules table with name
-- CONDUCTORS
-- mesecon:is_conductor(nodename) --> Returns true if nodename is a conductor
-- mesecon:is_conductor_on(nodename) --> Returns true if nodename is a conductor with state = mesecon.state.on
-- mesecon:is_conductor_off(nodename) --> Returns true if nodename is a conductor with state = mesecon.state.off
-- mesecon:get_conductor_on(offstate) --> Returns the onstate nodename of the conductor with the name offstate
-- mesecon:get_conductor_off(onstate) --> Returns the offstate nodename of the conductor with the name onstate
-- mesecon:conductor_get_rules(node) --> Returns the input+output rules of a conductor (mesecon.rules.default if none specified)
-- HIGH-LEVEL Internals
-- mesecon:is_power_on(pos) --> Returns true if pos emits power in any way
-- mesecon:is_power_off(pos) --> Returns true if pos does not emit power in any way
-- mesecon:turnon(pos, rulename) --> Returns true whatever there is at pos. Calls itself for connected nodes (if pos is a conductor) --> recursive, the rulename is the name of the input rule that caused calling turnon
-- mesecon:turnoff(pos, rulename) --> Turns off whatever there is at pos. Calls itself for connected nodes (if pos is a conductor) --> recursive, the rulename is the name of the input rule that caused calling turnoff
-- mesecon:connected_to_receptor(pos) --> Returns true if pos is connected to a receptor directly or via conductors; calls itself if pos is a conductor --> recursive
-- mesecon:rules_link(output, input, dug_outputrules) --> Returns true if outputposition + outputrules = inputposition and inputposition + inputrules = outputposition (if the two positions connect)
-- mesecon:rules_link_anydir(outp., inp., d_outpr.) --> Same as rules mesecon:rules_link but also returns true if output and input are swapped
-- mesecon:is_powered(pos) --> Returns true if pos is powered by a receptor or a conductor
-- RULES ROTATION helpsers
-- mesecon:rotate_rules_right(rules)
-- mesecon:rotate_rules_left(rules)
-- mesecon:rotate_rules_up(rules)
-- mesecon:rotate_rules_down(rules)
-- These functions return rules that have been rotated in the specific direction
-- General
function mesecon:get_effector(nodename)
if minetest.registered_nodes[nodename]
and minetest.registered_nodes[nodename].mesecons
and minetest.registered_nodes[nodename].mesecons.effector then
return minetest.registered_nodes[nodename].mesecons.effector
end
end
function mesecon:get_receptor(nodename)
if minetest.registered_nodes[nodename]
and minetest.registered_nodes[nodename].mesecons
and minetest.registered_nodes[nodename].mesecons.receptor then
return minetest.registered_nodes[nodename].mesecons.receptor
end
end
function mesecon:get_conductor(nodename)
if minetest.registered_nodes[nodename]
and minetest.registered_nodes[nodename].mesecons
and minetest.registered_nodes[nodename].mesecons.conductor then
return minetest.registered_nodes[nodename].mesecons.conductor
end
end
function mesecon:get_any_outputrules (node)
if mesecon:is_conductor(node.name) then
return mesecon:conductor_get_rules(node)
elseif mesecon:is_receptor(node.name) then
return mesecon:receptor_get_rules(node)
end
return false
end
function mesecon:get_any_inputrules (node)
if mesecon:is_conductor(node.name) then
return mesecon:conductor_get_rules(node)
elseif mesecon:is_effector(node.name) then
return mesecon:effector_get_rules(node)
end
return false
end
-- Receptors
-- Nodes that can power mesecons
function mesecon:is_receptor_on(nodename)
local receptor = mesecon:get_receptor(nodename)
if receptor and receptor.state == mesecon.state.on then
return true
end
return false
end
function mesecon:is_receptor_off(nodename)
local receptor = mesecon:get_receptor(nodename)
if receptor and receptor.state == mesecon.state.off then
return true
end
return false
end
function mesecon:is_receptor(nodename)
local receptor = mesecon:get_receptor(nodename)
if receptor then
return true
end
return false
end
function mesecon:receptor_get_rules(node)
local receptor = mesecon:get_receptor(node.name)
if receptor then
local rules = receptor.rules
if type(rules) == 'function' then
return rules(node)
elseif rules then
return rules
end
end
return mesecon.rules.default
end
-- Effectors
-- Nodes that can be powered by mesecons
function mesecon:is_effector_on(nodename)
local effector = mesecon:get_effector(nodename)
if effector and effector.action_off then
return true
end
return false
end
function mesecon:is_effector_off(nodename)
local effector = mesecon:get_effector(nodename)
if effector and effector.action_on then
return true
end
return false
end
function mesecon:is_effector(nodename)
local effector = mesecon:get_effector(nodename)
if effector then
return true
end
return false
end
function mesecon:effector_get_rules(node)
local effector = mesecon:get_effector(node.name)
if effector then
local rules = effector.rules
if type(rules) == 'function' then
return rules(node)
elseif rules then
return rules
end
end
return mesecon.rules.default
end
--Signals
function mesecon:activate(pos, node, rulename)
local effector = mesecon:get_effector(node.name)
if effector and effector.action_on then
effector.action_on (pos, node, rulename)
end
end
function mesecon:deactivate(pos, node, rulename)
local effector = mesecon:get_effector(node.name)
if effector and effector.action_off then
effector.action_off (pos, node, rulename)
end
end
function mesecon:changesignal(pos, node, rulename, newstate)
local effector = mesecon:get_effector(node.name)
if effector and effector.action_change then
effector.action_change (pos, node, rulename, newstate)
end
end
--Rules
function mesecon:add_rules(name, rules)
mesecon.rules[name] = rules
end
function mesecon:get_rules(name)
return mesecon.rules[name]
end
-- Conductors
function mesecon:is_conductor_on(nodename)
local conductor = mesecon:get_conductor(nodename)
if conductor and conductor.state == mesecon.state.on then
return true
end
return false
end
function mesecon:is_conductor_off(nodename)
local conductor = mesecon:get_conductor(nodename)
if conductor and conductor.state == mesecon.state.off then
return true
end
return false
end
function mesecon:is_conductor(nodename)
local conductor = mesecon:get_conductor(nodename)
if conductor then
return true
end
return false
end
function mesecon:get_conductor_on(offstate)
local conductor = mesecon:get_conductor(offstate)
if conductor then
return conductor.onstate
end
return false
end
function mesecon:get_conductor_off(onstate)
local conductor = mesecon:get_conductor(onstate)
if conductor then
return conductor.offstate
end
return false
end
function mesecon:conductor_get_rules(node)
local conductor = mesecon:get_conductor(node.name)
if conductor then
local rules = conductor.rules
if type(rules) == 'function' then
return rules(node)
elseif rules then
return rules
end
end
return mesecon.rules.default
end
-- some more general high-level stuff
function mesecon:is_power_on(pos)
local node = minetest.env:get_node(pos)
if mesecon:is_conductor_on(node.name) or mesecon:is_receptor_on(node.name) then
return true
end
return false
end
function mesecon:is_power_off(pos)
local node = minetest.env:get_node(pos)
if mesecon:is_conductor_off(node.name) or mesecon:is_receptor_off(node.name) then
return true
end
return false
end
function mesecon:turnon(pos, rulename)
local node = minetest.env:get_node(pos)
if mesecon:is_conductor_off(node.name) then
local rules = mesecon:conductor_get_rules(node)
minetest.env:add_node(pos, {name = mesecon:get_conductor_on(node.name), param2 = node.param2})
for _, rule in ipairs(rules) do
local np = mesecon:addPosRule(pos, rule)
local link, rulename = mesecon:rules_link(pos, np)
if link then
mesecon:turnon(np, rulename)
end
end
elseif mesecon:is_effector(node.name) then
mesecon:changesignal(pos, node, rulename, mesecon.state.on)
if mesecon:is_effector_off(node.name) then
mesecon:activate(pos, node, rulename)
end
end
end
function mesecon:turnoff(pos, rulename)
local node = minetest.env:get_node(pos)
if mesecon:is_conductor_on(node.name) then
local rules = mesecon:conductor_get_rules(node)
minetest.env:add_node(pos, {name = mesecon:get_conductor_off(node.name), param2 = node.param2})
for _, rule in ipairs(rules) do
local np = mesecon:addPosRule(pos, rule)
local link, rulename = mesecon:rules_link(pos, np)
if link then
mesecon:turnoff(np, rulename)
end
end
elseif mesecon:is_effector(node.name) then
mesecon:changesignal(pos, node, rulename, mesecon.state.off)
if mesecon:is_effector_on(node.name)
and not mesecon:is_powered(pos) then
mesecon:deactivate(pos, node, rulename)
end
end
end
function mesecon:connected_to_receptor(pos)
local node = minetest.env:get_node(pos)
-- Check if conductors around are connected
local rules = mesecon:get_any_inputrules(node)
if not rules then return false end
for _, rule in ipairs(rules) do
local np = mesecon:addPosRule(pos, rule)
if mesecon:rules_link(np, pos) then
if mesecon:find_receptor_on(np, {}) then
return true
end
end
end
return false
end
function mesecon:find_receptor_on(pos, checked)
-- find out if node has already been checked (to prevent from endless loop)
for _, cp in ipairs(checked) do
if mesecon:cmpPos(cp, pos) then
return false, checked
end
end
-- add current position to checked
table.insert(checked, {x=pos.x, y=pos.y, z=pos.z})
local node = minetest.env:get_node(pos)
if mesecon:is_receptor_on(node.name) then
return true
end
if mesecon:is_conductor(node.name) then
local rules = mesecon:conductor_get_rules(node)
for _, rule in ipairs(rules) do
local np = mesecon:addPosRule(pos, rule)
if mesecon:rules_link(np, pos) then
if mesecon:find_receptor_on(np, checked) then
return true
end
end
end
end
return false
end
function mesecon:rules_link(output, input, dug_outputrules) --output/input are positions (outputrules optional, used if node has been dug), second return value: the name of the affected input rule
local outputnode = minetest.env:get_node(output)
local inputnode = minetest.env:get_node(input)
local outputrules = dug_outputrules or mesecon:get_any_outputrules (outputnode)
local inputrules = mesecon:get_any_inputrules (inputnode)
if not outputrules or not inputrules then
return
end
for _, outputrule in ipairs(outputrules) do
-- Check if output sends to input
if mesecon:cmpPos(mesecon:addPosRule(output, outputrule), input) then
for _, inputrule in ipairs(inputrules) do
-- Check if input accepts from output
if mesecon:cmpPos(mesecon:addPosRule(input, inputrule), output) then
return true, inputrule.name
end
end
end
end
return false
end
function mesecon:rules_link_anydir(pos1, pos2)
return mesecon:rules_link(pos1, pos2) or mesecon:rules_link(pos2, pos1)
end
function mesecon:is_powered(pos)
local node = minetest.env:get_node(pos)
local rules = mesecon:get_any_inputrules(node)
if not rules then return false end
for _, rule in ipairs(rules) do
local np = mesecon:addPosRule(pos, rule)
local nn = minetest.env:get_node(np)
if (mesecon:is_conductor_on (nn.name) or mesecon:is_receptor_on (nn.name))
and mesecon:rules_link(np, pos) then
return true
end
end
return false
end
--Rules rotation Functions:
function mesecon:rotate_rules_right(rules)
local nr = {}
for i, rule in ipairs(rules) do
table.insert(nr, {
x = -rule.z,
y = rule.y,
z = rule.x})
end
return nr
end
function mesecon:rotate_rules_left(rules)
local nr = {}
for i, rule in ipairs(rules) do
table.insert(nr, {
x = rule.z,
y = rule.y,
z = -rule.x})
end
return nr
end
function mesecon:rotate_rules_down(rules)
local nr = {}
for i, rule in ipairs(rules) do
table.insert(nr, {
x = -rule.y,
y = rule.x,
z = rule.z})
end
return nr
end
function mesecon:rotate_rules_up(rules)
local nr = {}
for i, rule in ipairs(rules) do
table.insert(nr, {
x = rule.y,
y = -rule.x,
z = rule.z})
end
return nr
end