diff options
Diffstat (limited to 'doc/lua_api.txt')
| -rw-r--r-- | doc/lua_api.txt | 268 |
1 files changed, 138 insertions, 130 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt index bee247ca9..260a62763 100644 --- a/doc/lua_api.txt +++ b/doc/lua_api.txt @@ -768,7 +768,7 @@ Some of the values in the key-value store are handled specially: Example stuff: -local meta = minetest.env:get_meta(pos) +local meta = minetest.get_meta(pos) meta:set_string("formspec", "invsize[8,9;]".. "list[context;main;0,0;8,4;]".. @@ -914,6 +914,7 @@ minetest.formspec_escape(string) -> string minetest namespace reference ----------------------------- +Utilities: minetest.get_current_modname() -> string minetest.get_modpath(modname) -> eg. "/home/user/.minetest/usermods/modname" ^ Useful for loading additional .lua modules or static data from mod @@ -928,6 +929,7 @@ minetest.has_feature(arg) -> bool, missing_features ^ arg: string or table in format {foo=true, bar=true} ^ missing_features: {foo=true, bar=true} +Logging: minetest.debug(line) ^ Always printed to stderr and logfile (print() is redirected here) minetest.log(line) @@ -955,10 +957,12 @@ minetest.register_on_shutdown(func()) minetest.register_on_placenode(func(pos, newnode, placer, oldnode, itemstack)) ^ Called when a node has been placed ^ If return true no item is taken from itemstack -^ Deprecated: Use on_construct or after_place_node in node definition instead +^ Not recommended; use on_construct or after_place_node in node definition +^ whenever possible minetest.register_on_dignode(func(pos, oldnode, digger)) ^ Called when a node has been dug. -^ Deprecated: Use on_destruct or after_dig_node in node definition instead +^ Not recommended: Use on_destruct or after_dig_node in node definition +^ whenever possible minetest.register_on_punchnode(func(pos, node, puncher)) ^ Called when a node is punched minetest.register_on_generated(func(minp, maxp, blockseed)) @@ -1025,6 +1029,64 @@ minetest.chat_send_all(text) minetest.chat_send_player(name, text, prepend) ^ prepend: optional, if it is set to false "Server -!- " will not be prepended to the message +Environment access: + +minetest.set_node(pos, node) +minetest.add_node(pos, node): alias set_node(pos, node) +^ Set node at position (node = {name="foo", param1=0, param2=0}) +minetest.remove_node(pos) +^ Equivalent to set_node(pos, "air") +minetest.get_node(pos) +^ Returns {name="ignore", ...} for unloaded area +minetest.get_node_or_nil(pos) +^ Returns nil for unloaded area +minetest.get_node_light(pos, timeofday) -> 0...15 or nil +^ timeofday: nil = current time, 0 = night, 0.5 = day + +minetest.place_node(pos, node) +^ Place node with the same effects that a player would cause +minetest.dig_node(pos) +^ Dig node with the same effects that a player would cause +minetest.punch_node(pos) +^ Punch node with the same effects that a player would cause + +minetest.get_meta(pos) -- Get a NodeMetaRef at that position +minetest.get_node_timer(pos) -- Get NodeTimerRef + +minetest.add_entity(pos, name): Spawn Lua-defined entity at position +^ Returns ObjectRef, or nil if failed +minetest.add_item(pos, item): Spawn item +^ Returns ObjectRef, or nil if failed +minetest.get_player_by_name(name) -- Get an ObjectRef to a player +minetest.get_objects_inside_radius(pos, radius) +minetest.set_timeofday(val): val: 0...1; 0 = midnight, 0.5 = midday +minetest.get_timeofday() +minetest.find_node_near(pos, radius, nodenames) -> pos or nil +^ nodenames: eg. {"ignore", "group:tree"} or "default:dirt" +minetest.find_nodes_in_area(minp, maxp, nodenames) -> list of positions +^ nodenames: eg. {"ignore", "group:tree"} or "default:dirt" +minetest.get_perlin(seeddiff, octaves, persistence, scale) +^ Return world-specific perlin noise (int(worldseed)+seeddiff) +minetest.clear_objects() +^ clear all objects in the environments +minetest.line_of_sight(pos1,pos2,stepsize) ->true/false +^ checkif there is a direct line of sight between pos1 and pos2 +^ pos1 First position +^ pos2 Second position +^ stepsize smaller gives more accurate results but requires more computing + time. Default is 1. +minetest.find_path(pos1,pos2,searchdistance,max_jump,max_drop,algorithm) +^ -> table containing path +^ returns a table of 3d points representing a path from pos1 to pos2 or nil +^ pos1: start position +^ pos2: end position +^ searchdistance: number of blocks to search in each direction +^ max_jump: maximum height difference to consider walkable +^ max_drop: maximum height difference to consider droppable +^ algorithm: A*_noprefetch(default), A*, Dijkstra +minetest.spawn_tree (pos, {treedef}) +^ spawns L-System tree at given pos with definition in treedef table + Inventory: minetest.get_inventory(location) -> InvRef ^ location = eg. {type="player", name="celeron55"} @@ -1195,7 +1257,11 @@ minetest.deserialize(string) -> table Global objects: minetest.env - EnvRef of the server environment and world. -^ Using this you can access nodes and entities +^ Any function in the minetest namespace can be called using the syntax + minetest.env:somefunction(somearguments) + instead of + minetest.somefunction(somearguments) +^ Deprecated, but support is not to be dropped soon Global tables: minetest.registered_items @@ -1224,129 +1290,9 @@ minetest.digprop_glasslike(toughness) Class reference ---------------- -EnvRef: basically ServerEnvironment and ServerMap combined. -methods: -- set_node(pos, node) -- add_node(pos, node): alias set_node(pos, node) - ^ Set node at position (node = {name="foo", param1=0, param2=0}) -- remove_node(pos) - ^ Equivalent to set_node(pos, "air") -- get_node(pos) - ^ Returns {name="ignore", ...} for unloaded area -- get_node_or_nil(pos) - ^ Returns nil for unloaded area -- get_node_light(pos, timeofday) -> 0...15 or nil - ^ timeofday: nil = current time, 0 = night, 0.5 = day - -- place_node(pos, node) - ^ Place node with the same effects that a player would cause -- dig_node(pos) - ^ Dig node with the same effects that a player would cause -- punch_node(pos) - ^ Punch node with the same effects that a player would cause - -- get_meta(pos) -- Get a NodeMetaRef at that position -- get_node_timer(pos) -- Get NodeTimerRef - -- add_entity(pos, name): Spawn Lua-defined entity at position - ^ Returns ObjectRef, or nil if failed -- add_item(pos, item): Spawn item - ^ Returns ObjectRef, or nil if failed -- get_player_by_name(name) -- Get an ObjectRef to a player -- get_objects_inside_radius(pos, radius) -- set_timeofday(val): val: 0...1; 0 = midnight, 0.5 = midday -- get_timeofday() -- find_node_near(pos, radius, nodenames) -> pos or nil - ^ nodenames: eg. {"ignore", "group:tree"} or "default:dirt" -- find_nodes_in_area(minp, maxp, nodenames) -> list of positions - ^ nodenames: eg. {"ignore", "group:tree"} or "default:dirt" -- get_perlin(seeddiff, octaves, persistence, scale) - ^ Return world-specific perlin noise (int(worldseed)+seeddiff) -- clear_objects() - ^ clear all objects in the environments -- line_of_sight(pos1,pos2,stepsize) ->true/false - ^ checkif there is a direct line of sight between pos1 and pos2 - ^ pos1 First position - ^ pos2 Second position - ^ stepsize smaller gives more accurate results but requires more computing - time. Default is 1. --find_path(pos1,pos2,searchdistance,max_jump,max_drop,algorithm) -> table containing path - ^ returns a table of 3d points representing a path from pos1 to pos2 or nil - ^ pos1: start position - ^ pos2: end position - ^ searchdistance: number of blocks to search in each direction - ^ max_jump: maximum height difference to consider walkable - ^ max_drop: maximum height difference to consider droppable - ^ algorithm: A*_noprefetch(default), A*, Dijkstra -- spawn_tree (pos, {treedef}) - ^ spawns L-System tree at given pos with definition in treedef table -treedef={ - axiom, - string initial tree axiom - rules_a, - string rules set A - rules_b, - string rules set B - rules_c, - string rules set C - rules_d, - string rules set D - trunk, - string trunk node name - leaves, - string leaves node name - leaves2, - string secondary leaves node name - leaves2_chance,- num chance (0-100) to replace leaves with leaves2 - angle, - num angle in deg - iterations, - num max # of iterations, usually 2 -5 - random_level, - num factor to lower nr of iterations, usually 0 - 3 - trunk_type, - string single/double/crossed) type of trunk: 1 node, 2x2 nodes or 3x3 in cross shape - thin_branches, - boolean true -> use thin (1 node) branches - fruit, - string fruit node name - fruit_chance, - num chance (0-100) to replace leaves with fruit node - seed, - num random seed - } - -Key for Special L-System Symbols used in Axioms - G - move forward one unit with the pen up - F - move forward one unit with the pen down drawing trunks and branches - f - move forward one unit with the pen down drawing leaves (100% chance) - T - move forward one unit with the pen down drawing trunks only - R - move forward one unit with the pen down placing fruit - A - replace with rules set A - B - replace with rules set B - C - replace with rules set C - D - replace with rules set D - a - replace with rules set A, chance 90% - b - replace with rules set B, chance 80% - c - replace with rules set C, chance 70% - d - replace with rules set D, chance 60% - + - yaw the turtle right by angle parameter - - - yaw the turtle left by angle parameter - & - pitch the turtle down by angle parameter - ^ - pitch the turtle up by angle parameter - / - roll the turtle to the right by angle parameter - * - roll the turtle to the left by angle parameter - [ - save in stack current state info - ] - recover from stack state info - -Example usage: spawn small apple tree -apple_tree={ - axiom="FFFFFAFFBF", - rules_a="[&&&FFFFF&&FFFF][&&&++++FFFFF&&FFFF][&&&----FFFFF&&FFFF]", - rules_b="[&&&++FFFFF&&FFFF][&&&--FFFFF&&FFFF][&&&------FFFFF&&FFFF]", - trunk="default:tree", - leaves="default:leaves", - angle=30, - iterations=2, - random_level=0, - trunk_type="single", - thin_branches=true, - fruit_chance=10, - fruit="default:apple" - } -minetest.env:spawn_tree(pos,apple_tree) - -Deprecated: -- add_rat(pos): Add C++ rat object (no-op) -- add_firefly(pos): Add C++ firefly object (no-op) - NodeMetaRef: Node metadata - reference extra data and functionality stored in a node -- Can be gotten via minetest.env:get_nodemeta(pos) +- Can be gotten via minetest.get_nodemeta(pos) methods: - set_string(name, value) - get_string(name) @@ -1360,7 +1306,7 @@ methods: ^ See "Node Metadata" NodeTimerRef: Node Timers - a high resolution persistent per-node timer -- Can be gotten via minetest.env:get_node_timer(pos) +- Can be gotten via minetest.get_node_timer(pos) methods: - set(timeout,elapsed) ^ set a timer's state @@ -1515,7 +1461,7 @@ methods: PerlinNoise: A perlin noise generator - Can be created via PerlinNoise(seed, octaves, persistence, scale) -- Also minetest.env:get_perlin(seeddiff, octaves, persistence, scale) +- Also minetest.get_perlin(seeddiff, octaves, persistence, scale) methods: - get2d(pos) -> 2d noise value at pos={x=,y=} - get3d(pos) -> 3d noise value at pos={x=,y=,z=} @@ -1545,6 +1491,68 @@ Registered entities ^ Should return a string that will be passed to on_activate when the object is instantiated the next time. +L-system trees +--------------- +treedef={ + axiom, - string initial tree axiom + rules_a, - string rules set A + rules_b, - string rules set B + rules_c, - string rules set C + rules_d, - string rules set D + trunk, - string trunk node name + leaves, - string leaves node name + leaves2, - string secondary leaves node name + leaves2_chance,- num chance (0-100) to replace leaves with leaves2 + angle, - num angle in deg + iterations, - num max # of iterations, usually 2 -5 + random_level, - num factor to lower nr of iterations, usually 0 - 3 + trunk_type, - string single/double/crossed) type of trunk: 1 node, 2x2 nodes or 3x3 in cross shape + thin_branches, - boolean true -> use thin (1 node) branches + fruit, - string fruit node name + fruit_chance, - num chance (0-100) to replace leaves with fruit node + seed, - num random seed + } + +Key for Special L-System Symbols used in Axioms + G - move forward one unit with the pen up + F - move forward one unit with the pen down drawing trunks and branches + f - move forward one unit with the pen down drawing leaves (100% chance) + T - move forward one unit with the pen down drawing trunks only + R - move forward one unit with the pen down placing fruit + A - replace with rules set A + B - replace with rules set B + C - replace with rules set C + D - replace with rules set D + a - replace with rules set A, chance 90% + b - replace with rules set B, chance 80% + c - replace with rules set C, chance 70% + d - replace with rules set D, chance 60% + + - yaw the turtle right by angle parameter + - - yaw the turtle left by angle parameter + & - pitch the turtle down by angle parameter + ^ - pitch the turtle up by angle parameter + / - roll the turtle to the right by angle parameter + * - roll the turtle to the left by angle parameter + [ - save in stack current state info + ] - recover from stack state info + +Example usage: spawn small apple tree +apple_tree={ + axiom="FFFFFAFFBF", + rules_a="[&&&FFFFF&&FFFF][&&&++++FFFFF&&FFFF][&&&----FFFFF&&FFFF]", + rules_b="[&&&++FFFFF&&FFFF][&&&--FFFFF&&FFFF][&&&------FFFFF&&FFFF]", + trunk="default:tree", + leaves="default:leaves", + angle=30, + iterations=2, + random_level=0, + trunk_type="single", + thin_branches=true, + fruit_chance=10, + fruit="default:apple" + } +minetest.spawn_tree(pos,apple_tree) + Definition tables ------------------ @@ -1714,13 +1722,13 @@ Node definition (register_node) after_place_node = func(pos, placer, itemstack), ^ Called after constructing node when node was placed using - minetest.item_place_node / minetest.env:place_node + minetest.item_place_node / minetest.place_node ^ If return true no item is taken from itemstack ^ default: nil after_dig_node = func(pos, oldnode, oldmetadata, digger), ^ oldmetadata is in table format ^ Called after destructing node when node was dug using - minetest.node_dig / minetest.env:dig_node + minetest.node_dig / minetest.dig_node ^ default: nil can_dig = function(pos,player) ^ returns true if node can be dug, or false if not @@ -1739,7 +1747,7 @@ Node definition (register_node) on_timer = function(pos,elapsed), ^ default: nil - ^ called by NodeTimers, see EnvRef and NodeTimerRef + ^ called by NodeTimers, see minetest.get_node_timer and NodeTimerRef ^ elapsed is the total time passed since the timer was started ^ return true to run the timer for another cycle with the same timeout value |