1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
local hudHandlers = {}
areas.registered_on_adds = {}
areas.registered_on_removes = {}
areas.registered_on_moves = {}
function areas:registerOnAdd(func)
table.insert(areas.registered_on_adds, func)
end
function areas:registerOnRemove(func)
table.insert(areas.registered_on_removes, func)
end
function areas:registerOnMove(func)
table.insert(areas.registered_on_moves, func)
end
--- Adds a function as a HUD handler, it will be able to add items to the Areas HUD element.
function areas:registerHudHandler(handler)
table.insert(hudHandlers, handler)
end
function areas:getExternalHudEntries(pos)
local areas = {}
for _, func in pairs(hudHandlers) do
func(pos, areas)
end
return areas
end
--- Returns a list of areas that include the provided position.
function areas:getAreasAtPos(pos)
local res = {}
if self.store then
local a = self.store:get_areas_for_pos(pos, false, true)
for store_id, store_area in pairs(a) do
local id = tonumber(store_area.data)
res[id] = self.areas[id]
end
else
local px, py, pz = pos.x, pos.y, pos.z
for id, area in pairs(self.areas) do
local ap1, ap2 = area.pos1, area.pos2
if
(px >= ap1.x and px <= ap2.x) and
(py >= ap1.y and py <= ap2.y) and
(pz >= ap1.z and pz <= ap2.z) then
res[id] = area
end
end
end
return res
end
--- Returns areas that intersect with the passed area.
function areas:getAreasIntersectingArea(pos1, pos2)
local res = {}
if self.store then
local a = self.store:get_areas_in_area(pos1, pos2,
true, false, true)
for store_id, store_area in pairs(a) do
local id = tonumber(store_area.data)
res[id] = self.areas[id]
end
else
self:sortPos(pos1, pos2)
local p1x, p1y, p1z = pos1.x, pos1.y, pos1.z
local p2x, p2y, p2z = pos2.x, pos2.y, pos2.z
for id, area in pairs(self.areas) do
local ap1, ap2 = area.pos1, area.pos2
if
(ap1.x <= p2x and ap2.x >= p1x) and
(ap1.y <= p2y and ap2.y >= p1y) and
(ap1.z <= p2z and ap2.z >= p1z) then
-- Found an intersecting area.
res[id] = area
end
end
end
return res
end
-- Checks if the area is unprotected or owned by you
function areas:canInteract(pos, name)
if minetest.check_player_privs(name, self.adminPrivs) then
return true
end
local owned = false
for _, area in pairs(self:getAreasAtPos(pos)) do
if area.owner == name or area.open then
return true
else
owned = true
end
end
return not owned
end
-- Returns a table (list) of all players that own an area
function areas:getNodeOwners(pos)
local owners = {}
for _, area in pairs(self:getAreasAtPos(pos)) do
table.insert(owners, area.owner)
end
return owners
end
--- Checks if the area intersects with an area that the player can't interact in.
-- Note that this fails and returns false when the specified area is fully
-- owned by the player, but with multiple protection zones, none of which
-- cover the entire checked area.
-- @param name (optional) Player name. If not specified checks for any intersecting areas.
-- @param allow_open Whether open areas should be counted as if they didn't exist.
-- @return Boolean indicating whether the player can interact in that area.
-- @return Un-owned intersecting area ID, if found.
function areas:canInteractInArea(pos1, pos2, name, allow_open)
if name and minetest.check_player_privs(name, self.adminPrivs) then
return true
end
self:sortPos(pos1, pos2)
-- Intersecting non-owned area ID, if found.
local blocking_area = nil
local areas = self:getAreasIntersectingArea(pos1, pos2)
for id, area in pairs(areas) do
-- First check for a fully enclosing owned area.
-- A little optimization: isAreaOwner isn't necessary
-- here since we're iterating over all relevant areas.
if area.owner == name and
self:isSubarea(pos1, pos2, id) then
return true
end
-- Then check for intersecting non-owned (blocking) areas.
-- We don't bother with this check if we've already found a
-- blocking area, as the check is somewhat expensive.
-- The area blocks if the area is closed or open areas aren't
-- acceptable to the caller, and the area isn't owned.
-- Note: We can't return directly here, because there might be
-- an exclosing owned area that we haven't gotten to yet.
if not blocking_area and
(not allow_open or not area.open) and
(not name or not self:isAreaOwner(id, name)) then
blocking_area = id
end
end
if blocking_area then
return false, blocking_area
end
-- There are no intersecting areas or they are only partially
-- intersecting areas and they are all owned by the player.
return true
end
|