mirror of
https://github.com/DrBeef/Raze.git
synced 2024-11-16 17:31:27 +00:00
113 lines
3.4 KiB
Lua
113 lines
3.4 KiB
Lua
-- Random walker as updatesector() timing test, for Lunatic-m32
|
|
-- Load with: lua "require 'randwalk'"
|
|
|
|
local ffi = require "ffi"
|
|
local ffiC = ffi.C
|
|
|
|
local geom = require "geom"
|
|
local stat = require "stat"
|
|
|
|
|
|
-- set to nil to disable saving positions
|
|
g_posns = {}
|
|
|
|
-- [STATS, TIMES] = RANDWALK(N, SPRITENUM, MINLEN, MAXLEN [, RANDOFS [, FUNCI [, LOGFN]]])
|
|
function randwalk(N, spritenum, minlen, maxlen, randofs, funci, logfn)
|
|
-- Set the random seed to an arbitrary but fixed value so that the "random" walk
|
|
-- is deterministically reproducible for particular arguments.
|
|
math.randomseed(834572183572)
|
|
|
|
randofs = randofs or 0
|
|
|
|
for i=1,randofs do
|
|
math.random()
|
|
end
|
|
|
|
local funcnames = { "updatesector", "updatesectorbreadth", "updatesectorz" }
|
|
local funcs = { updatesector, updatesectorbreadth, updatesectorz }
|
|
local updatesectorfunc = funcs[funci]
|
|
|
|
-- stats
|
|
local st = { all=stat.new(), succ=stat.new(), fail=stat.new() }
|
|
|
|
local times = {}
|
|
local successp = {}
|
|
|
|
local pos = geom.tovec3(sprite[spritenum])
|
|
local sectnum = sprite[spritenum].sectnum
|
|
|
|
for i=1,N do
|
|
--[[
|
|
-- get random integers for the displacement
|
|
local ax,ay,az = math.random(minlen,maxlen), math.random(minlen,maxlen), math.random(minlen,maxlen)
|
|
|
|
-- random signs
|
|
local sx,sy,sz = math.random(0,1), math.random(0,1), math.random(0,1)
|
|
sx, sy, sz = 2*sx-1, 2*sy-1, 2*sz-1 -- {0,1} -> {-1,1}
|
|
ax, ay, az = sx*ax, sy*ay, sz*az
|
|
--]]
|
|
---[[
|
|
local ang = 2*math.pi*math.random()
|
|
local len = math.random(minlen, maxlen)
|
|
local ax, ay, az = len*math.cos(ang), len*math.sin(ang), 0
|
|
--]]
|
|
local newpos = pos + geom.ivec3(ax,ay,az)
|
|
|
|
local t = ffiC.gethitickms()
|
|
local newsect = updatesectorfunc(newpos, sectnum)
|
|
t = ffiC.gethitickms()-t
|
|
|
|
st.all:add(t)
|
|
times[i] = t
|
|
|
|
successp[i] = (newsect >= 0)
|
|
|
|
if (newsect >= 0) then
|
|
st.succ:add(t)
|
|
|
|
pos = newpos
|
|
sectnum = newsect
|
|
else
|
|
st.fail:add(t)
|
|
end
|
|
|
|
if (g_posns ~= nil) then
|
|
g_posns[i] = pos
|
|
end
|
|
end
|
|
|
|
local stallres = st.all:getstats()
|
|
|
|
print("====================")
|
|
printf("Random %s walk starting with sprite %d",
|
|
funcnames[funci], spritenum)
|
|
printf("Hop length: [%d .. %d], RNG offset: %d, %s",
|
|
minlen, maxlen, randofs, logfn)
|
|
printf("-- Times [ms] (total=%f)", N*stallres.mean)
|
|
print("All: ".. tostring(stallres))
|
|
print("Succeeded: ".. st.succ:getstatstr())
|
|
print("Failed: ".. st.fail:getstatstr())
|
|
|
|
if (logfn ~= nil) then
|
|
local logfile, errmsg = io.open(logfn, "w")
|
|
if (logfile == nil) then
|
|
printf("Couldn't open log file \"%s\" for writing: %s",
|
|
logfn, errmsg)
|
|
else
|
|
logfile:write(" \t \t \t\t\n")
|
|
for i=1,N do
|
|
if (g_posns ~= nil) then
|
|
logfile:write(string.format("%s %d %d %d %d\n",
|
|
tostring(times[i]), successp[i] and 1 or 0,
|
|
g_posns[i].x, g_posns[i].y, g_posns[i].z))
|
|
else
|
|
logfile:write(string.format("%s %d\n", tostring(times[i]), successp[i] and 1 or 0))
|
|
end
|
|
end
|
|
|
|
logfile:close()
|
|
end
|
|
end
|
|
|
|
return st, ts
|
|
end
|