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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
local enet = require"enet"
local json = require"common.dkjson"
local chunk = require"common.chunk"
local Chunk = require"common.chunk".Chunk
local noise = require"noise"
local coords = require"common.coords"
local worldgen = require"worldgen"
local MapS = require"map".MapS
local posix_time = require"posix.time"
math.randomseed(os.time())
local host = enet.host_create("*:8473")
print(host:get_socket_address())
-- sequential list of all players
local playerlist = {}
local nextid = 1
-- this is maybe suboptimal
-- but it is simplest for now
local function player_by_id(id)
for i,pl in ipairs(playerlist) do
if pl.id == id then return pl, i end
end
return nil
end
local function player_by_peer(peer)
for i,pl in ipairs(playerlist) do
if pl.peer == peer then return pl, i end
end
return nil
end
local function random_color()
return {math.random(),math.random(),math.random()}
end
local function make_player(peer)
local p = {pos={0,0},color=random_color(),peer=peer,id=nextid}
nextid = nextid + 1
return p
end
local function player_info_part(player)
return {
id=player.id,
x=player.pos[1],
y=player.pos[2],
color=player.color,
}
end
local function player_join_packet(player)
return json.encode{t="join",pl=player_info_part(player)}
end
local function player_you_packet(player)
return json.encode{t="you",pl=player_info_part(player)}
end
local function player_leave_packet(player)
return json.encode{t="leave",id=player.id}
end
local function player_move_packet(player,x,y)
return json.encode{t="move",id=player.id,x=x,y=y}
end
local map = MapS:make()
local function handle_ev(ev)
-- handle network event
if ev.type == "connect" then
local player = make_player(ev.peer)
table.insert(playerlist,player)
print("connect",player.peer,player.id)
player.peer:send(player_you_packet(player))
local central_chunk = map:obtain(coords.ChunkPos:make(0,0))
player.peer:send(central_chunk:data_packet())
for i,otherplayer in ipairs(playerlist) do
if otherplayer ~= player then
-- tell new player about each other player
player.peer:send(player_join_packet(otherplayer))
-- tell each other player about new player
otherplayer.peer:send(player_join_packet(player))
end
end
elseif ev.type == "disconnect" then
local player, idx = player_by_peer(ev.peer)
if not player then error("sneeze "..ev.peer) end
print("disconnect",player.peer,player.id)
table.remove(playerlist,idx)
for i,otherplayer in ipairs(playerlist) do
otherplayer.peer:send(player_leave_packet(player))
end
elseif ev.type == "receive" then
local player = player_by_peer(ev.peer)
if not player then error("sneezey "..ev.peer) end
local j = json.decode(ev.data)
local op = j.t
if op == "ppos" then
local x,y = j.x,j.y
player.pos[1] = x
player.pos[2] = y
-- print(player.id,"-->",player.pos[1],player.pos[2])
for i,otherplayer in ipairs(playerlist) do
if otherplayer ~= player then
otherplayer.peer:send(player_move_packet(player,x,y))
end
end
elseif op == "settile" then
local h = coords.Hex:make(j.q,j.r)
map:set_at(h,j.tile)
-- print(player.id,"settile",h,j.tile)
for i,otherplayer in ipairs(playerlist) do
if otherplayer ~= player then
-- same packet structure s2c as c2s
-- when multiple chunks exist and players only get info
-- about stuff near to them, that won't be the case any more
otherplayer.peer:send(ev.data)
end
end
elseif op == "reqchunk" then
-- i am not certain this is the best way for this to work
-- i might change it later
local cp = coords.ChunkPos:make(j.u,j.v)
local ch = map:obtain(cp)
player.peer:send(ch:data_packet())
end
end
end
local function timenow()
-- monotonic clock, guaranteed to never go backwards
local tv = posix_time.clock_gettime(posix_time.CLOCK_MONOTONIC)
-- this discards some precision but i don't care
return tv.tv_sec + (tv.tv_nsec/1000000000)
end
-- do something only every x seconds
-- returns function(dt) -> bool
-- which returns true if you should, and false otherwise
local function every(interval)
local time_since = interval+100
return function(dt)
time_since = time_since + dt
if time_since > interval then
time_since = 0
return true
else
return false
end
end
end
local tick_interval = 1 -- seconds
local last_tick_time = timenow()
-- average tps calculation
local dts = {}
local ndt = 1
local ndts = 100
local ntick = 0
local function tick(ntick)
if ntick % 30 == 0 then
print("saving things...")
end
end
while true do
local now = timenow()
local dt = now - last_tick_time
if dt >= tick_interval then
dts[ndt] = dt
ndt = 1+(ndt%ndts)
last_tick_time = now
ntick = ntick + 1
tick(ntick)
local tps = 0
for _,d in ipairs(dts) do tps = tps + 1/d end
tps = tps/#dts
print(ndt,ndts)
if 1 == ndt%ndts then
print("tps",tps)
end
end
local now2 = timenow()
local time_till_next_tick = (last_tick_time+tick_interval)-now2
if time_till_next_tick > 0 then
local ev = host:service(time_till_next_tick/1000)
if ev then handle_ev(ev) end
end
end
|
