advanced_npc/actions/places.lua

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-- Places code for Advanced NPC by Zorman2000
---------------------------------------------------------------------------------------
-- Places functionality
---------------------------------------------------------------------------------------
-- In addition, the NPCs need to know where some places are, and know
-- where there are nodes they can use. For example, they need to know where the
-- chest they use is located, both to walk to it and to use it. They also need
-- to know where the farm they work is located, or where the bed they sleep is.
-- Other mods have to be supported for this to work correctly, as there are
-- many sitting nodes, many beds, many tables, chests, etc. For now, by default,
-- support for default MTG games and cottages mod is going to be provided.
npc.places = {}
npc.places.nodes = {
BED_TYPE = {
"beds:bed_bottom",
"beds:fancy_bed_bottom",
"cottages:bed_foot",
"cottages:straw_mat",
"cottages:sleeping_mat"
},
SITTABLE_TYPE = {
"cottages:bench",
-- Currently commented out since some NPCs
-- were sitting at stairs that are actually staircases
-- TODO: Register other stair types
--"stairs:stair_wood"
},
STORAGE_TYPE = {
"default:chest",
"default:chest_locked",
"cottages:shelf"
},
FURNACE_TYPE = {
"default:furnace",
"default:furnace_active"
},
OPENABLE_TYPE = {
-- TODO: Register fences
"doors:door_glass_a",
"doors:door_glass_b",
"doors:door_obsidian_a",
"doors:door_obsidian_b",
"doors:door_steel_a",
"doors:door_steel_b",
"doors:door_wood_a",
"doors:door_wood_b",
"cottages:gate_open",
"cottages:gate_closed",
"cottages:half_door"
},
PLOTMARKER_TYPE = {
"mg_villages:plotmarker",
"advanced_npc:plotmarker"
},
WORKPLACE_TYPE = {
-- TODO: Do we have an advanced_npc workplace?
"mg_villages:mob_workplace_marker",
"advanced_npc:workplace_marker"
}
}
npc.places.PLACE_TYPE = {
CATEGORIES = {
BED = "BED",
SITTABLE = "SITTABLE",
FURNACE = "FURNACE",
STORAGE = "STORAGE",
OPENABLE = "OPENABLE",
SCHEDULE = "SCHEDULE",
CALCULATED = "CALCULATED",
WORKPLACE = "WORKPLACE",
OTHER = "OTHER"
},
BED = {
PRIMARY = "bed_primary"
},
SITTABLE = {
PRIMARY = "sit_primary",
SHARED = "sit_shared"
},
FURNACE = {
PRIMARY = "furnace_primary",
SHARED = "furnace_shared"
},
STORAGE = {
PRIMARY = "storage_primary",
SHARED = "storage_shared"
},
OPENABLE = {
HOME_ENTRANCE_DOOR = "home_entrance_door"
},
SCHEDULE = {
TARGET = "schedule_target_pos"
},
CALCULATED = {
TARGET = "calculated_target_pos"
},
WORKPLACE = {
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PRIMARY = "workplace_primary",
TOOL = "workplace_tool"
},
OTHER = {
HOME_PLOTMARKER = "home_plotmarker",
HOME_INSIDE = "home_inside",
HOME_OUTSIDE = "home_outside"
},
is_primary = function(place_type)
local p1,p2 = string.find(place_type, "primary")
return p1 ~= nil
end,
-- Only works for place types where there is a "primary" and a "shared"
get_alternative = function(place_category, place_type)
local result = {}
local place_types = npc.places.PLACE_TYPE[place_category]
-- Determine search type
local search_shared = false
if npc.places.PLACE_TYPE.is_primary(place_type) then
search_shared = true
end
for key,place_type in pairs(place_types) do
if search_shared == true then
if npc.places.PLACE_TYPE.is_primary(place_type) == false then
return place_type
end
else
if npc.places.PLACE_TYPE.is_primary(place_type) == true then
return place_type
end
end
end
end
}
npc.places.USE_STATE = {
USED = "true",
NOT_USED = "false"
}
function npc.places.add_shared(self, place_name, place_type, pos, access_node)
-- Set metadata of node
local meta = minetest.get_meta(pos)
if not meta:get_string("advanced_npc:used") then
meta:set_string("advanced_npc:used", npc.places.USE_STATE.NOT_USED)
end
meta:set_string("advanced_npc:owner", "")
-- This avoid lags
meta:mark_as_private({"advanced_npc:used", "advanced_npc:owner"})
self.places_map[place_name] = {type=place_type, pos=pos, access_node=access_node or pos, status="shared"}
end
function npc.places.add_owned(self, place_name, place_type, pos, access_node)
-- Set metadata of node
local meta = minetest.get_meta(pos)
if not meta:get_string("advanced_npc:used") then
meta:set_string("advanced_npc:used", npc.places.USE_STATE.NOT_USED)
end
meta:set_string("advanced_npc:owner", self.npc_id)
-- This avoid lags
meta:mark_as_private({"advanced_npc:used", "advanced_npc:owner"})
self.places_map[place_name] = {type=place_type, pos=pos, access_node=access_node or pos, status="owned"}
end
function npc.places.add_owned_accessible_place(self, nodes, place_type, walkables)
for i = 1, #nodes do
-- Check if node has owner
local owner = minetest.get_meta(nodes[i].node_pos):get_string("advanced_npc:owner")
--minetest.log("Condition: "..dump(owner == ""))
if owner == "" then
-- If node has no owner, check if it is accessible
local empty_nodes = npc.places.find_orthogonal_accessible_node(
nodes[i].node_pos, nil, 0, true, walkables)
-- Check if node is accessible
if #empty_nodes > 0 then
-- Set owner to this NPC
nodes[i].owner = self.npc_id
-- Assign node to NPC
npc.places.add_owned(self, place_type, place_type,
nodes[i].node_pos, empty_nodes[1].pos)
npc.log("DEBUG", "Added node at "..minetest.pos_to_string(nodes[i].node_pos)
.." to NPC "..dump(self.npc_name))
break
end
end
end
end
-- Override flag allows to overwrite a place in the places_map.
-- The only valid use right now is for schedules - don't use this
-- anywhere else unless you have a position that changes over time.
function npc.places.add_shared_accessible_place(self, nodes, place_type, override, walkables)
if not override or (override and override == false) then
for i = 1, #nodes do
-- Check if not adding same owned place
if nodes[i].owner ~= self.npc_id then
-- Check if it is accessible
local empty_nodes = npc.places.find_orthogonal_accessible_node(
nodes[i].node_pos, nil, 0, true, walkables)
-- Check if node is accessible
if #empty_nodes > 0 then
-- Assign node to NPC
npc.places.add_shared(self, place_type..dump(i),
place_type, nodes[i].node_pos, empty_nodes[1].pos)
else
npc.log("WARNING", "Found non-accessible place at pos: "..minetest.pos_to_string(nodes[i].node_pos))
end
end
end
elseif override == true then
-- Note: Nodes is only *one* node in case override = true
-- Check if it is accessible
local empty_nodes = npc.places.find_orthogonal_accessible_node(
nodes.node_pos, nil, 0, true, walkables)
-- Check if node is accessible
if #empty_nodes > 0 then
-- Nodes is only one node
npc.places.add_shared(self, place_type, place_type,
nodes.node_pos, empty_nodes[1].pos)
end
end
end
function npc.places.mark_place_used(pos, value)
local meta = minetest.get_meta(pos)
local used = meta:get_string("advanced_npc:used")
if value == used then
npc.log("WARNING", "Attempted to set 'used' property of node at "
..minetest.pos_to_string(pos).." to the same value: '"..dump(value).."'")
return false
else
meta:set_string("advanced_npc:used", value)
npc.log("DEBUG", "'Used' value at pos "..minetest.pos_to_string(pos)..": "..dump(meta:get_string("advanced_npc:used")))
return true
end
end
-- This function is to find an alternative place if the original is
-- not usable. If the original place is a "primary" place, it will
-- try to find a "shared" place. If it is a "shared" place, it will try
-- to find a "primary" place. If none is found, it retuns the given type.
function npc.places.find_unused_place(self, place_category, place_type, original_place)
local result = {}
-- Check if node is being used
local meta = minetest.get_meta(original_place.pos)
local used = meta:get_string("advanced_npc:used")
if used == npc.places.USE_STATE.USED then
-- Node is being used, try to find alternative
local alternative_place_type = npc.places.PLACE_TYPE.get_alternative(place_category, place_type)
--minetest.log("Alternative place type: "..dump(alternative_place_type))
local alternative_places = npc.places.get_by_type(self, alternative_place_type)
--minetest.log("Alternatives: "..dump(alternative_places))
for i = 1, #alternative_places do
meta = minetest.get_meta(alternative_places[i].pos)
local used = meta:get_string("advanced_npc:used")
if used == npc.places.USE_STATE.NOT_USED then
return alternative_places[i]
end
end
else
result = original_place
end
return result
end
function npc.places.get_by_type(self, place_type, exact_match)
local result = {}
for _, place_entry in pairs(self.places_map) do
-- Check if place_type matches any stored place
-- local condition = false
-- if exact_match then
-- -- If no exact match, search if place_type is contained
-- if exact_match == false then
-- local s, _ = string.find(place_entry.type, place_type)
-- if s ~= nil then
-- condition = true
-- end
-- else
-- -- Exact match
-- if place_entry.type == place_type then
-- condition = true
-- end
-- end
-- end
-- if condition == true
local s, _ = string.find(place_entry.type, place_type)
--minetest.log("place_entry: "..dump(place_entry))
--minetest.log("place_type: "..dump(place_type))
--minetest.log("S: "..dump(s))
if s ~= nil then
table.insert(result, place_entry)
end
end
return result
end
---------------------------------------------------------------------------------------
-- Utility functions
---------------------------------------------------------------------------------------
-- The following are utility functions that are used to operate on nodes for
-- specific conditions
-- This function searches on a squared are of the given radius
-- for nodes of the given type. The type should be npc.places.nodes
function npc.places.find_node_nearby(pos, type, radius)
-- Determine area points
local start_pos = {x=pos.x - radius, y=pos.y - 1, z=pos.z - radius}
local end_pos = {x=pos.x + radius, y=pos.y + 1, z=pos.z + radius}
-- Get nodes
local nodes = minetest.find_nodes_in_area(start_pos, end_pos, type)
return nodes
end
-- TODO: This function can be improved to support a radius greater than 1.
function npc.places.find_node_orthogonally(pos, nodes, y_adjustment)
-- Call the more generic function with appropriate params
2017-09-18 06:33:24 +02:00
return npc.places.find_orthogonal_accessible_node(pos, nodes, y_adjustment, nil, nil)
end
-- TODO: This function can be improved to support a radius greater than 1.
function npc.places.find_orthogonal_accessible_node(pos, nodes, y_adjustment, include_walkables, extra_walkables)
-- Calculate orthogonal points
local points = {}
table.insert(points, {x=pos.x+1,y=pos.y+y_adjustment,z=pos.z})
table.insert(points, {x=pos.x-1,y=pos.y+y_adjustment,z=pos.z})
table.insert(points, {x=pos.x,y=pos.y+y_adjustment,z=pos.z+1})
table.insert(points, {x=pos.x,y=pos.y+y_adjustment,z=pos.z-1})
local result = {}
for _,point in pairs(points) do
local node = minetest.get_node(point)
-- Search for specific node names
if nodes then
for _,node_name in pairs(nodes) do
if node.name == node_name then
table.insert(result, {name=node.name, pos=point, param2=node.param2})
end
end
else
-- Search for air, walkable nodes, or any node availble in the extra_walkables array
if node.name == "air"
or (include_walkables == true
and minetest.registered_nodes[node.name].walkable == false
and minetest.registered_nodes[node.name].groups.fence ~= 1)
or (extra_walkables and npc.utils.array_contains(extra_walkables, node.name)) then
table.insert(result, {name=node.name, pos=point, param2=node.param2})
end
end
end
return result
end
-- Wrapper around minetest.find_nodes_in_area()
-- TODO: Verify if this wrapper is actually needed
function npc.places.find_node_in_area(start_pos, end_pos, type)
local nodes = minetest.find_nodes_in_area(start_pos, end_pos, type)
return nodes
end
-- Function used to filter all nodes in the first floor of a building
-- If floor height isn't given, it will assume 2
-- Notice that nodes is an array of entries {node_pos={}, type={}}
function npc.places.filter_first_floor_nodes(nodes, ground_pos, floor_height)
local height = floor_height or 2
local result = {}
for _,node in pairs(nodes) do
if node.node_pos.y <= ground_pos.y + height then
table.insert(result, node)
end
end
return result
end
-- Creates an array of {pos=<node_pos>, owner=''} for managing
-- which NPC owns what
function npc.places.get_nodes_by_type(start_pos, end_pos, type)
local result = {}
local nodes = npc.places.find_node_in_area(start_pos, end_pos, type)
--minetest.log("Found "..dump(#nodes).." nodes of type: "..dump(type))
for _,node_pos in pairs(nodes) do
local entry = {}
entry["node_pos"] = node_pos
entry["owner"] = ''
table.insert(result, entry)
end
return result
end
-- Function to get mg_villages building data
if minetest.get_modpath("mg_villages") ~= nil then
function npc.places.get_mg_villages_building_data(pos)
local result = {
village_id = "",
plot_nr = -1,
building_data = {},
building_type = "",
}
local meta = minetest.get_meta(pos)
result.plot_nr = meta:get_int("plot_nr")
result.village_id = meta:get_string("village_id")
-- Get building data
if mg_villages.get_plot_and_building_data then
local all_data = mg_villages.get_plot_and_building_data(result.village_id, result.plot_nr)
result.building_data = all_data.building_data
result.building_type = result.building_data.typ
result["building_pos_data"] = all_data.bpos
else
-- Following line from mg_villages mod, protection.lua
local btype = mg_villages.all_villages[result.village_id].to_add_data.bpos[result.plot_nr].btype
result.building_data = mg_villages.BUILDINGS[btype]
result.building_type = result.building_data.typ
end
return result
end
-- Pre-requisite: only run this function on mg_villages:plotmarker that has been adapted
-- by using spawner.adapt_mg_villages_plotmarker
function npc.places.get_all_workplaces_from_plotmarker(pos)
local result = {}
local meta = minetest.get_meta(pos)
local pos_data = minetest.deserialize(meta:get_string("building_pos_data"))
if pos_data then
local workplaces = pos_data.workplaces
if workplaces then
-- Insert all workplaces in this plotmarker
for i = 1, #workplaces do
table.insert(result,
{
workplace=workplaces[i],
building_type=meta:get_string("building_type"),
surrounding_workplace = false,
node_pos= {
x=workplaces[i].x,
y=workplaces[i].y,
z=workplaces[i].z
}
})
end
end
end
-- Check the other plotmarkers as well
local nearby_plotmarkers = minetest.deserialize(meta:get_string("nearby_plotmarkers"))
if nearby_plotmarkers then
for i = 1, #nearby_plotmarkers do
if nearby_plotmarkers[i].workplaces then
-- Insert all workplaces in this plotmarker
for j = 1, #nearby_plotmarkers[i].workplaces do
--minetest.log("Nearby plotmarker workplace #"..dump(j)..": "..dump(nearby_plotmarkers[i].workplaces[j]))
table.insert(result, {
workplace=nearby_plotmarkers[i].workplaces[j],
building_type = nearby_plotmarkers[i].building_type,
surrounding_workplace = true,
node_pos = {
x=nearby_plotmarkers[i].workplaces[j].x,
y=nearby_plotmarkers[i].workplaces[j].y,
z=nearby_plotmarkers[i].workplaces[j].z
}
})
end
end
end
end
return result
end
end
-- This function will search for nodes of type plotmarker and,
-- in case of being an mg_villages plotmarker, it will fetch building
-- information and include in result.
function npc.places.find_plotmarkers(pos, radius, exclude_current_pos)
local result = {}
local start_pos = {x=pos.x - radius, y=pos.y - 1, z=pos.z - radius}
local end_pos = {x=pos.x + radius, y=pos.y + 1, z=pos.z + radius}
local nodes = minetest.find_nodes_in_area(start_pos, end_pos,
npc.places.nodes.PLOTMARKER_TYPE)
-- Scan nodes
for i = 1, #nodes do
-- Check if current plotmarker is to be excluded from the list
local exclude = false
if exclude_current_pos then
if pos.x == nodes[i].x and pos.y == nodes[i].y and pos.z == nodes[i].z then
exclude = true
end
end
-- Analyze and include node if not excluded
if not exclude then
local node = minetest.get_node(nodes[i])
local def = {}
def["pos"] = nodes[i]
def["name"] = node.name
if node.name == "mg_villages:plotmarker" and npc.places.get_mg_villages_building_data then
local data = npc.places.get_mg_villages_building_data(nodes[i])
def["plot_nr"] = data.plot_nr
def["village_id"] = data.village_id
def["building_data"] = data.building_data
def["building_type"] = data.building_type
if data.building_pos_data then
def["building_pos_data"] = data.building_pos_data
def["workplaces"] = data.building_pos_data.workplaces
end
end
-- Add building
--minetest.log("Adding building: "..dump(def))
table.insert(result, def)
end
end
return result
end
-- Scans an area for the supported nodes: beds, benches,
-- furnaces, storage (e.g. chests) and openable (e.g. doors).
-- Returns a table with these classifications
function npc.places.scan_area_for_usable_nodes(pos1, pos2)
local result = {
bed_type = {},
sittable_type = {},
furnace_type = {},
storage_type = {},
openable_type = {},
workplace_type = {}
}
local start_pos, end_pos = vector.sort(pos1, pos2)
result.bed_type = npc.places.get_nodes_by_type(start_pos, end_pos, npc.places.nodes.BED_TYPE)
result.sittable_type = npc.places.get_nodes_by_type(start_pos, end_pos, npc.places.nodes.SITTABLE_TYPE)
result.furnace_type = npc.places.get_nodes_by_type(start_pos, end_pos, npc.places.nodes.FURNACE_TYPE)
result.storage_type = npc.places.get_nodes_by_type(start_pos, end_pos, npc.places.nodes.STORAGE_TYPE)
result.openable_type = npc.places.get_nodes_by_type(start_pos, end_pos, npc.places.nodes.OPENABLE_TYPE)
-- Find workplace nodes: if mg_villages:plotmarker is given as start pos, take it from there.
-- If not, search for them.
local node = minetest.get_node(pos1)
if node.name == "mg_villages:plotmarker" then
if npc.places.get_all_workplaces_from_plotmarker then
result.workplace_type = npc.places.get_all_workplaces_from_plotmarker(pos1)
end
else
-- Just search for workplace nodes
-- The search radius is increased by 2
result.workplace_type = npc.places.get_nodes_by_type(
{x=start_pos.x-20, y=start_pos.y, z=start_pos.z-20},
{x=end_pos.x+20, y=end_pos.y, z=end_pos.z+20},
npc.places.nodes.WORKPLACE_TYPE)
-- Find out building type and add it to the result
for i = 1, #result.workplace_type do
local meta = minetest.get_meta(result.workplace_type[i].node_pos)
local building_type = meta:get_string("building_type") or "none"
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local surrounding_workplace = meta:get_string("surrounding_workplace") or "false"
result.workplace_type[i]["surrounding_workplace"] = minetest.is_yes(surrounding_workplace)
result.workplace_type[i]["building_type"] = building_type
end
end
return result
end
-- Helper function to clear metadata in an array of nodes
-- Metadata that will be cleared is:
-- advanced_npc:used
-- advanced_npc:owner
local function clear_metadata(nodes)
local c = 0
for i = 1, #nodes do
local meta = minetest.get_meta(nodes[i].node_pos)
meta:set_string("advanced_npc:owner", "")
meta:set_string("advanced_npc:used", npc.places.USE_STATE.NOT_USED)
c = c + 1
end
return c
end
function npc.places.clear_metadata_usable_nodes_in_area(node_data)
local count = 0
count = count + clear_metadata(node_data.bed_type)
count = count + clear_metadata(node_data.sittable_type)
count = count + clear_metadata(node_data.furnace_type)
count = count + clear_metadata(node_data.storage_type)
count = count + clear_metadata(node_data.openable_type)
-- Clear workplace nodes
for i = 1, #node_data.workplace_type do
local meta = minetest.get_meta(node_data.workplace_type[i].node_pos)
meta:set_string("work_data", nil)
count = count + 1
end
return count
end
-- Specialized function to find doors that are an entrance to a building.
2017-04-08 16:21:51 +02:00
-- The definition of an entrance is:
-- The openable node with the shortest path to the plotmarker node
-- Based on this definition, other entrances aren't going to be used
-- by the NPC to get into the building
function npc.places.find_entrance_from_openable_nodes(all_openable_nodes, marker_pos)
local result
local openable_nodes = {}
local min = 100
2017-04-08 16:21:51 +02:00
-- Filter out all other openable nodes except MTG doors.
-- Why? For supported village types (which are: medieval, nore
-- and logcabin) all buildings use, as the main entrance,
-- a MTG door. Some medieval building have "half_doors" (like farms)
-- which NPCs love to confuse with the right building entrance.
for i = 1, #all_openable_nodes do
local name = minetest.get_node(all_openable_nodes[i].node_pos).name
local doors_st, _ = string.find(name, "doors:")
if doors_st ~= nil then
table.insert(openable_nodes, all_openable_nodes[i])
end
end
for i = 1, #openable_nodes do
local open_pos = openable_nodes[i].node_pos
-- Get node name - check if this node is a 'door'. The way to check
-- is by explicitly checking for 'door' string
local name = minetest.get_node(open_pos).name
local start_i, _ = string.find(name, "door")
if start_i ~= nil then
-- Define start and end pos
local start_pos = {x=open_pos.x, y=open_pos.y, z=open_pos.z}
local end_pos = {x=marker_pos.x, y=marker_pos.y, z=marker_pos.z}
2017-04-08 16:21:51 +02:00
-- minetest.log("Openable node pos: "..minetest.pos_to_string(open_pos))
-- minetest.log("Plotmarker node pos: "..minetest.pos_to_string(marker_pos))
2017-04-08 16:21:51 +02:00
-- Find path from the openable node to the plotmarker
--local path = pathfinder.find_path(start_pos, end_pos, 20, {})
local entity = {}
entity.collisionbox = {-0.20,-1.0,-0.20, 0.20,0.8,0.20}
--minetest.log("Start pos: "..minetest.pos_to_string(start_pos))
--minetest.log("End pos: "..minetest.pos_to_string(end_pos))
local path = npc.pathfinder.find_path(start_pos, end_pos, entity, false)
--minetest.log("Found path: "..dump(path))
if path ~= nil then
--minetest.log("Path distance: "..dump(#path))
-- Check if path length is less than the minimum found so far
if #path < min then
-- Set min to path length and the result to the currently found node
min = #path
result = openable_nodes[i]
else
-- Specific check to prefer mtg's doors to cottages' doors.
-- The reason? Sometimes a cottages' door could be closer to the
-- plotmarker, but not being the building entrance. MTG doors
-- are usually the entrance... so yes, hackity hack.
-- Get the name of the currently mininum-distance door
local min_node_name = minetest.get_node(result.node_pos).name
-- Check if this is a door from MTG's doors.
local doors_st, _ = string.find(name, "doors:")
-- Check if min-distance door is a cottages door
-- while we have a MTG door
if min_node_name == "cottages:half_door" and doors_st ~= nil then
--minetest.log("Assigned new door...")
min = #path
result = openable_nodes[i]
end
end
else
npc.log("ERROR", "Path not found to marker from "..minetest.pos_to_string(start_pos))
end
end
end
-- Return result
return result
end
-- Specialized function to find all sittable nodes supported by the
-- mod, namely default stairs and cottages' benches. Since not all
-- stairs nodes placed aren't meant to simulate benches, this function
-- is necessary in order to find stairs that are meant to be benches.
function npc.places.find_sittable_nodes_nearby(pos, radius)
local result = {}
-- Try to find sittable nodes
local nodes = npc.places.find_node_nearby(pos, npc.places.nodes.SITTABLE, radius)
-- Highly unorthodox check for emptinnes
if nodes[1] ~= nil then
for i = 1, #nodes do
-- Get node name, try to avoid using the staircase check if not a stair node
local node = minetest.get_node(nodes[i])
local i1, _ = string.find(node.name, "stairs:")
if i1 ~= nil then
if npc.places.is_in_staircase(nodes[i]) < 1 then
table.insert(result, nodes[i])
end
else
-- Add node as it is sittable
table.insert(result, nodes[i])
end
end
end
-- Return sittable nodes
return result
end
-- Specialized function to find sittable stairs: stairs that don't
-- have any other stair above them. Only stairs using the default
-- stairs mod are supported for now.
-- Receives a position of a stair node.
npc.places.staircase = {
none = 0,
bottom = 1,
middle = 2,
top = 3
}
function npc.places.is_in_staircase(pos)
local node = minetest.get_node(pos)
-- Verify node is actually from default stairs mod
local p1, _ = string.find(node.name, "stairs:")
if p1 ~= nil then
-- Calculate the logical position to the lower and upper stairs node location
local up_x_adj, up_z_adj = 0, 0
local lo_x_adj, lo_z_adj = 0, 0
if node.param2 == 1 then
up_z_adj = -1
lo_z_adj = 1
elseif node.param2 == 2 then
up_z_adj = 1
lo_z_adj = -1
elseif node.param2 == 3 then
up_x_adj = -1
lo_x_adj = 1
elseif node.param2 == 4 then
up_x_adj = 1
lo_x_adj = -1
else
-- This is not a staircase
return false
end
-- Calculate upper and lower position
local upper_pos = {x=pos.x + up_x_adj, y=pos.y + 1, z=pos.z + up_z_adj}
local lower_pos = {x=pos.x + lo_x_adj, y=pos.y - 1, z=pos.z + lo_z_adj}
-- Get next node
local upper_node = minetest.get_node(upper_pos)
local lower_node = minetest.get_node(lower_pos)
--minetest.log("Next node: "..dump(upper_pos))
-- Check if next node is also a stairs node
local up_p1, _ = string.find(upper_node.name, "stairs:")
local lo_p1, _ = string.find(lower_node.name, "stairs:")
if up_p1 ~= nil then
-- By default, think this is bottom of staircase.
local result = npc.places.staircase.bottom
-- Try downwards now
if lo_p1 ~= nil then
result = npc.places.staircase.middle
end
return result
else
-- Check if there is a staircase downwards
if lo_p1 ~= nil then
return npc.places.staircase.top
else
return npc.places.staircase.none
end
end
end
-- This is not a stairs node
return nil
end
-- Specialized function to find the node position right behind
-- a door. Used to make NPCs enter buildings.
function npc.places.find_node_in_front_and_behind_door(door_pos)
local door = minetest.get_node(door_pos)
local facedir_vector = minetest.facedir_to_dir(door.param2)
local back_pos = vector.add(door_pos, facedir_vector)
local back_node = minetest.get_node(back_pos)
local front_pos
if back_node.name == "air" or minetest.registered_nodes[back_node.name].walkable == false then
-- Door is closed, so back_pos is the actual behind position.
-- Calculate front node
front_pos = vector.add(door_pos, vector.multiply(facedir_vector, -1))
else
-- Door is open, need to find the front and back pos
facedir_vector = minetest.facedir_to_dir((door.param2 + 2) % 4)
back_pos = vector.add(door_pos, facedir_vector)
front_pos = vector.add(door_pos, vector.multiply(facedir_vector, -1))
end
return back_pos, front_pos
-- if door.param2 == 0 then
-- -- Looking south
-- return {x=door_pos.x, y=door_pos.y, z=door_pos.z + 1}
-- elseif door.param2 == 1 then
-- -- Looking east
-- return {x=door_pos.x + 1, y=door_pos.y, z=door_pos.z}
-- elseif door.param2 == 2 then
-- -- Looking north
-- return {x=door_pos.x, y=door_pos.y, z=door_pos.z - 1}
-- -- Looking west
-- elseif door.param2 == 3 then
-- return {x=door_pos.x - 1, y=door_pos.y, z=door_pos.z}
-- end
end
-- Specialized function to find the node position right in
-- front of a door. Used to make NPCs exit buildings.
--function npc.places.find_node_in_front_of_door(door_pos)
-- local door = minetest.get_node(door_pos)
-- --minetest.log("Param2 of door: "..dump(door.param2))
-- if door.param2 == 0 then
-- -- Looking south
-- return {x=door_pos.x, y=door_pos.y, z=door_pos.z - 1}
-- elseif door.param2 == 1 then
-- -- Looking east
-- return {x=door_pos.x - 1, y=door_pos.y, z=door_pos.z}
-- elseif door.param2 == 2 then
-- -- Looking north
-- return {x=door_pos.x, y=door_pos.y, z=door_pos.z + 1}
-- elseif door.param2 == 3 then
-- -- Looking west
-- return {x=door_pos.x + 1, y=door_pos.y, z=door_pos.z}
-- end
--end