539 lines
17 KiB
Lua
539 lines
17 KiB
Lua
-- Internal.lua - The core of mesecons
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--
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-- For more practical developer resources see mesecons.tk
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--
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-- Function overview
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-- mesecon:get_effector(nodename) --> Returns the mesecons.effector -specifictation in the nodedef by the nodename
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-- mesecon:get_receptor(nodename) --> Returns the mesecons.receptor -specifictation in the nodedef by the nodename
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-- mesecon:get_conductor(nodename) --> Returns the mesecons.conductor-specifictation in the nodedef by the nodename
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-- mesecon:get_any_inputrules (node) --> Returns the rules of a node if it is a conductor or an effector
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-- mesecon:get_any_outputrules (node) --> Returns the rules of a node if it is a conductor or a receptor
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-- RECEPTORS
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-- mesecon:is_receptor(nodename) --> Returns true if nodename is a receptor
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-- mesecon:is_receptor_on(nodename) --> Returns true if nodename is an receptor with state = mesecon.state.on
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-- mesecon:is_receptor_off(nodename) --> Returns true if nodename is an receptor with state = mesecon.state.off
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-- mesecon:receptor_get_rules(node) --> Returns the rules of the receptor (mesecon.rules.default if none specified)
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-- EFFECTORS
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-- mesecon:is_effector(nodename) --> Returns true if nodename is an effector
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-- mesecon:is_effector_on(nodename) --> Returns true if nodename is an effector with nodedef.mesecons.effector.action_off
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-- mesecon:is_effector_off(nodename) --> Returns true if nodename is an effector with nodedef.mesecons.effector.action_on
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-- mesecon:effector_get_rules(node) --> Returns the input rules of the effector (mesecon.rules.default if none specified)
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-- SIGNALS
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-- mesecon:activate(pos, node) --> Activates the effector node at the specific pos (calls nodedef.mesecons.effector.action_on)
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-- mesecon:deactivate(pos, node) --> Deactivates the effector node at the specific pos (calls nodedef.mesecons.effector.action_off)
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-- mesecon:changesignal(pos, node, rulename, newstate) --> Changes the effector node at the specific pos (calls nodedef.mesecons.effector.action_change)
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-- RULES
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-- mesecon:add_rules(name, rules) | deprecated? --> Saves rules table by name
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-- mesecon:get_rules(name, rules) | deprecated? --> Loads rules table with name
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-- CONDUCTORS
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-- mesecon:is_conductor(nodename) --> Returns true if nodename is a conductor
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-- mesecon:is_conductor_on(nodename) --> Returns true if nodename is a conductor with state = mesecon.state.on
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-- mesecon:is_conductor_off(nodename) --> Returns true if nodename is a conductor with state = mesecon.state.off
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-- mesecon:get_conductor_on(offstate) --> Returns the onstate nodename of the conductor with the name offstate
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-- mesecon:get_conductor_off(onstate) --> Returns the offstate nodename of the conductor with the name onstate
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-- mesecon:conductor_get_rules(node) --> Returns the input+output rules of a conductor (mesecon.rules.default if none specified)
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-- HIGH-LEVEL Internals
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-- mesecon:is_power_on(pos) --> Returns true if pos emits power in any way
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-- mesecon:is_power_off(pos) --> Returns true if pos does not emit power in any way
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-- 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
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-- 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
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-- 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
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-- mesecon:rules_link(output, input, dug_outputrules) --> Returns true if outputposition + outputrules = inputposition and inputposition + inputrules = outputposition (if the two positions connect)
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-- mesecon:rules_link_anydir(outp., inp., d_outpr.) --> Same as rules mesecon:rules_link but also returns true if output and input are swapped
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-- mesecon:is_powered(pos) --> Returns true if pos is powered by a receptor or a conductor
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-- RULES ROTATION helpsers
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-- mesecon:rotate_rules_right(rules)
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-- mesecon:rotate_rules_left(rules)
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-- mesecon:rotate_rules_up(rules)
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-- mesecon:rotate_rules_down(rules)
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-- These functions return rules that have been rotated in the specific direction
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-- General
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function mesecon:get_effector(nodename)
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if minetest.registered_nodes[nodename]
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and minetest.registered_nodes[nodename].mesecons
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and minetest.registered_nodes[nodename].mesecons.effector then
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return minetest.registered_nodes[nodename].mesecons.effector
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end
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end
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function mesecon:get_receptor(nodename)
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if minetest.registered_nodes[nodename]
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and minetest.registered_nodes[nodename].mesecons
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and minetest.registered_nodes[nodename].mesecons.receptor then
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return minetest.registered_nodes[nodename].mesecons.receptor
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end
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end
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function mesecon:get_conductor(nodename)
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if minetest.registered_nodes[nodename]
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and minetest.registered_nodes[nodename].mesecons
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and minetest.registered_nodes[nodename].mesecons.conductor then
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return minetest.registered_nodes[nodename].mesecons.conductor
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end
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end
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function mesecon:get_any_outputrules (node)
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if mesecon:is_conductor(node.name) then
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return mesecon:conductor_get_rules(node)
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elseif mesecon:is_receptor(node.name) then
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return mesecon:receptor_get_rules(node)
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end
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return false
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end
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function mesecon:get_any_inputrules (node)
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if mesecon:is_conductor(node.name) then
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return mesecon:conductor_get_rules(node)
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elseif mesecon:is_effector(node.name) then
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return mesecon:effector_get_rules(node)
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end
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return false
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end
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-- Receptors
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-- Nodes that can power mesecons
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function mesecon:is_receptor_on(nodename)
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local receptor = mesecon:get_receptor(nodename)
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if receptor and receptor.state == mesecon.state.on then
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return true
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end
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return false
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end
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function mesecon:is_receptor_off(nodename)
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local receptor = mesecon:get_receptor(nodename)
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if receptor and receptor.state == mesecon.state.off then
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return true
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end
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return false
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end
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function mesecon:is_receptor(nodename)
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local receptor = mesecon:get_receptor(nodename)
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if receptor then
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return true
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end
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return false
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end
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function mesecon:receptor_get_rules(node)
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local receptor = mesecon:get_receptor(node.name)
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if receptor then
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local rules = receptor.rules
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if type(rules) == 'function' then
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return rules(node)
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elseif rules then
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return rules
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end
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end
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return mesecon.rules.default
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end
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-- Effectors
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-- Nodes that can be powered by mesecons
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function mesecon:is_effector_on(nodename)
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local effector = mesecon:get_effector(nodename)
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if effector and effector.action_off then
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return true
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end
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return false
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end
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function mesecon:is_effector_off(nodename)
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local effector = mesecon:get_effector(nodename)
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if effector and effector.action_on then
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return true
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end
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return false
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end
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function mesecon:is_effector(nodename)
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local effector = mesecon:get_effector(nodename)
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if effector then
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return true
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end
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return false
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end
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function mesecon:effector_get_rules(node)
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local effector = mesecon:get_effector(node.name)
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if effector then
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local rules = effector.rules
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if type(rules) == 'function' then
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return rules(node)
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elseif rules then
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return rules
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end
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end
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return mesecon.rules.default
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end
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--Signals
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function mesecon:activate(pos, node, rulename)
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local effector = mesecon:get_effector(node.name)
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if effector and effector.action_on then
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effector.action_on (pos, node, rulename)
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end
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end
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function mesecon:deactivate(pos, node, rulename)
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local effector = mesecon:get_effector(node.name)
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if effector and effector.action_off then
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effector.action_off (pos, node, rulename)
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end
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end
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function mesecon:changesignal(pos, node, rulename, newstate)
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local effector = mesecon:get_effector(node.name)
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if effector and effector.action_change then
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effector.action_change (pos, node, rulename, newstate)
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end
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end
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--Rules
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function mesecon:add_rules(name, rules)
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mesecon.rules[name] = rules
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end
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function mesecon:get_rules(name)
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return mesecon.rules[name]
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end
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-- Conductors
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function mesecon:is_conductor_on(nodename, rulename)
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local conductor = mesecon:get_conductor(nodename)
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if conductor then
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if conductor.state then
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return conductor.state == mesecon.state.on
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end
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if conductor.states then
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if not rulename then
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return mesecon:getstate(nodename, conductor.states) ~= 1
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end
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local bit = mesecon:rule2bit(rulename, mesecon:conductor_get_rules(minetest.registered_nodes[nodename]))
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local binstate = mesecon:getbinstate(nodename, conductor.states)
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return mesecon:get_bit(binstate, bit)
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end
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end
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return false
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end
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function mesecon:is_conductor_off(nodename, rulename)
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local conductor = mesecon:get_conductor(nodename)
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if conductor then
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if conductor.state then
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return conductor.state == mesecon.state.off
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end
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if conductor.states then
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if not rulename then
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return mesecon:getstate(nodename, conductor.states) == 1
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end
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local bit = mesecon:rule2bit(rulename, mesecon:conductor_get_rules(minetest.registered_nodes[nodename]))
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local binstate = mesecon:getbinstate(nodename, conductor.states)
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return not mesecon:get_bit(binstate, bit)
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end
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end
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return false
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end
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function mesecon:is_conductor(nodename)
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local conductor = mesecon:get_conductor(nodename)
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if conductor then
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return true
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end
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return false
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end
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function mesecon:get_conductor_on(offstate, rulename)
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local conductor = mesecon:get_conductor(offstate)
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if conductor then
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if conductor.onstate then
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return conductor.onstate
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end
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if conductor.states then
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local bit = mesecon:rule2bit(rulename, mesecon:conductor_get_rules(minetest.registered_nodes[offstate]))
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local binstate = mesecon:getbinstate(offstate, conductor.states)
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binstate = mesecon:set_bit(binstate, bit, "1")
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return conductor.states[tonumber(binstate,2)+1]
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end
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end
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return offstate
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end
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function mesecon:get_conductor_off(onstate, rulename)
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local conductor = mesecon:get_conductor(onstate)
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if conductor then
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if conductor.offstate then
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return conductor.offstate
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end
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if conductor.states then
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local bit = mesecon:rule2bit(rulename, mesecon:conductor_get_rules(minetest.registered_nodes[onstate]))
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local binstate = mesecon:getbinstate(onstate, conductor.states)
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binstate = mesecon:set_bit(binstate, bit, "0")
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return conductor.states[tonumber(binstate,2)+1]
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end
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end
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return onstate
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end
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function mesecon:conductor_get_rules(node)
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local conductor = mesecon:get_conductor(node.name)
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if conductor then
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local rules = conductor.rules
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if type(rules) == 'function' then
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return rules(node)
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elseif rules then
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return rules
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end
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end
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return mesecon.rules.default
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end
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-- some more general high-level stuff
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function mesecon:is_power_on(pos, rulename)
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local node = minetest.env:get_node(pos)
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if mesecon:is_conductor_on(node.name, rulename) or mesecon:is_receptor_on(node.name) then
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return true
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end
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return false
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end
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function mesecon:is_power_off(pos, rulename)
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local node = minetest.env:get_node(pos)
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if mesecon:is_conductor_off(node.name, rulename) or mesecon:is_receptor_off(node.name) then
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return true
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end
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return false
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end
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function mesecon:turnon(pos, rulename)
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local node = minetest.env:get_node(pos)
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if mesecon:is_conductor_off(node.name, rulename) then
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local rules = mesecon:conductor_get_rules(node)
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if not rulename then
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for _, rule in ipairs(mesecon:flattenrules(rules)) do
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if mesecon:connected_to_receptor(pos, rule) then
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mesecon:turnon(pos, rule)
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end
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end
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return
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end
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minetest.env:add_node(pos, {name = mesecon:get_conductor_on(node.name, rulename), param2 = node.param2})
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for _, rule in ipairs(mesecon:rule2meta(rulename, rules)) do
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local np = mesecon:addPosRule(pos, rule)
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local link, rulename = mesecon:rules_link(pos, np)
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if link then
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mesecon:turnon(np, rulename)
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end
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end
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elseif mesecon:is_effector(node.name) then
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mesecon:changesignal(pos, node, rulename, mesecon.state.on)
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if mesecon:is_effector_off(node.name) then
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mesecon:activate(pos, node, rulename)
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end
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end
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end
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function mesecon:turnoff(pos, rulename)
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local node = minetest.env:get_node(pos)
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if mesecon:is_conductor_on(node.name, rulename) then
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local rules = mesecon:conductor_get_rules(node)
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--[[
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if not rulename then
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for _, rule in ipairs(mesecon:flattenrules(rules)) do
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if mesecon:is_powered(pos, rule) then
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mesecon:turnoff(pos, rule)
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end
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end
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return
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end
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--]]
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minetest.env:add_node(pos, {name = mesecon:get_conductor_off(node.name, rulename), param2 = node.param2})
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for _, rule in ipairs(mesecon:rule2meta(rulename, rules)) do
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local np = mesecon:addPosRule(pos, rule)
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local link, rulename = mesecon:rules_link(pos, np)
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if link then
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mesecon:turnoff(np, rulename)
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end
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end
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elseif mesecon:is_effector(node.name) then
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mesecon:changesignal(pos, node, rulename, mesecon.state.off)
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if mesecon:is_effector_on(node.name)
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and not mesecon:is_powered(pos) then
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mesecon:deactivate(pos, node, rulename)
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end
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end
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end
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function mesecon:connected_to_receptor(pos, rulename)
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local node = minetest.env:get_node(pos)
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-- Check if conductors around are connected
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local rules = mesecon:get_any_inputrules(node)
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if not rules then return false end
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for _, rule in ipairs(mesecon:rule2meta(rulename, rules)) do
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local np = mesecon:addPosRule(pos, rule)
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if mesecon:rules_link(np, pos) then
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if mesecon:find_receptor_on(np, {}, mesecon:invertRule(rule)) then
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return true
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end
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end
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end
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return false
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end
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function mesecon:find_receptor_on(pos, checked, rulename)
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-- find out if node has already been checked (to prevent from endless loop)
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for _, cp in ipairs(checked) do
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if mesecon:cmpPos(cp, pos) then
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return false, checked
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end
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end
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-- add current position to checked
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table.insert(checked, {x=pos.x, y=pos.y, z=pos.z})
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local node = minetest.env:get_node(pos)
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if mesecon:is_receptor_on(node.name) then
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return true
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end
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if mesecon:is_conductor(node.name) then
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local rules = mesecon:conductor_get_rules(node)
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for _, rule in ipairs(mesecon:rule2meta(rulename, rules)) do
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local np = mesecon:addPosRule(pos, rule)
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if mesecon:rules_link(np, pos) then
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if mesecon:find_receptor_on(np, checked, mesecon:invertRule(rule)) then
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return true
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end
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end
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end
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end
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return false
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end
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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
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local outputnode = minetest.env:get_node(output)
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local inputnode = minetest.env:get_node(input)
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local outputrules = dug_outputrules or mesecon:get_any_outputrules (outputnode)
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local inputrules = mesecon:get_any_inputrules (inputnode)
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if not outputrules or not inputrules then
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return
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end
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for _, outputrule in ipairs(mesecon:flattenrules(outputrules)) do
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-- Check if output sends to input
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if mesecon:cmpPos(mesecon:addPosRule(output, outputrule), input) then
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for _, inputrule in ipairs(mesecon:flattenrules(inputrules)) do
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-- Check if input accepts from output
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if mesecon:cmpPos(mesecon:addPosRule(input, inputrule), output) then
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return true, inputrule
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end
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end
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end
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end
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return false
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end
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function mesecon:rules_link_anydir(pos1, pos2)
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return mesecon:rules_link(pos1, pos2) or mesecon:rules_link(pos2, pos1)
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end
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function mesecon:is_powered(pos, rule)
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local node = minetest.env:get_node(pos)
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local rules = mesecon:get_any_inputrules(node)
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if not rules then return false end
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if not rule then
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for _, rule in ipairs(mesecon:flattenrules(rules)) do
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local np = mesecon:addPosRule(pos, rule)
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local nn = minetest.env:get_node(np)
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|
if (mesecon:is_conductor_on (nn.name, mesecon:invertRule(rule)) or mesecon:is_receptor_on (nn.name))
|
|
and mesecon:rules_link(np, pos) then
|
|
return true
|
|
end
|
|
end
|
|
else
|
|
local np = mesecon:addPosRule(pos, rule)
|
|
local nn = minetest.env:get_node(np)
|
|
|
|
if (mesecon:is_conductor_on (nn.name, mesecon:invertRule(rule)) 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
|