DDraceNetwork - developer

We had less accuracy on x86, destroying tournaments because the very weak gravity had no effect

<eeeee> did someone fix the bouncing plasma balls accuracy yet?

07:25

<eeeee> i used to run a server with the same map for months at a time, and the plasma balls were drifting at a rate of about half a tile per month or so

07:25

<heinrich5991> accuracy or missing team-awareness

07:25

<eeeee> because they were using trigonometry for reflections

07:25

<eeeee> nah, just float accuracy

07:26

<heinrich5991> what are the plasma balls?

balls that move and freeze

<heinrich5991> the laser things that shoot more laser things?

i guess

<eeeee> wait no

07:26

<heinrich5991> or the shotgun bullets that freeze?

07:26

<eeeee> those were some kind of bullets

07:26

<eeeee> plasma balls don't bounce

<heinrich5991> so the shotgun bullets that freeze?

07:27

<eeeee> yeah the shotgun bullets

07:27

<heinrich5991> they only ever hit the wall orthogonally

07:27

<eeeee> yeah but they were using sin/cos for reflections

07:27

<heinrich5991> I wonder what sin(PI) is in float

07:28

<heinrich5991> >>> np.sin(np.arange(4, dtype='float32') * np.pi)

07:28

<heinrich5991> array([ 0.00000000e+00, -8.74227766e-08, 1.74845553e-07,

07:28

<heinrich5991> -2.38497613e-08], dtype=float32)

07:28

<heinrich5991> argh

07:29

<heinrich5991> why do you even use sin/cos for reflection?

07:29

<heinrich5991> it's a simple subtraction

07:29

<heinrich5991> for orthogonal walls

07:29

<Ryozuki> -8.74228e-08

07:30

<heinrich5991> >>> np.sin(np.arange(4, dtype='float32') * np.pi / 2)

07:30

<heinrich5991> array([ 0.00000000e+00, 1.00000000e+00, -8.74227766e-08, -1.00000000e+00], dtype=float32)

07:30

<heinrich5991> actually, I wanted this ^

07:30

<Ryozuki> arange = arrange ?

07:31

<heinrich5991> so angles close to 180° are the culprit

07:31

<heinrich5991> ?

07:31

<heinrich5991> arange = arange

07:31

<Ryozuki> never heard that word

07:31

<heinrich5991> numpy.arange, generates numpy Arrays similar to the RANGE function of python

07:31

<Ryozuki> ah

07:33

<eeeee> oh lol

07:34

<eeeee> was trying to figure out if that shitcode was fixed by someone yet

07:34

<eeeee> found this https://github.com/ddnet/ddnet/commit/56ad4f3c738503a7b8b0624e637afd58782793ca

prevent bullets from drifting · ddnet/ddnet@56ad4f3

07:34

<heinrich5991> aaaahrg

07:34

<heinrich5991> :P

07:35

<eeeee> so, not really :D

07:35

<heinrich5991> well yes, -8.7e-8 < 1e-6

07:36

<eeeee> admittedly i didn't really bother to check that, my test plan was "run on my server for a couple months and see if it drifts"

07:39

<eeeee> i guess https://github.com/ddnet/ddnet/blob/master/src/game/server/gamecontroller.cpp#L235 is the place for a real fix

ddnet/ddnet

ddnet - DDraceNetwork, a mod of Teeworlds

def-

[ddnet/ddnet-web] Pull request closed: #31 rebuild .fade

07:59

def-

[ddnet-web:master] 2 new commits

04532bd rebuild .fade - CrashtimeHD f16544f Merge pull request #31 from CrashtimeHD/master - def-

<deen> heinrich5991: how do i set my own CFLAGS/CXXFLAGS with the new cmake build?

10:23

<deen> I thought it worked, but now I look at the compiler calls and my flags are not in there...

<heinrich5991> do rm -r build if you wan to set CFLAGS/CXXFLAGS

10:35

<heinrich5991> and regenerate the build directory

<deen> huh?

10:48

<deen> so calling cmake again does not reset everything?

def-

[ddnet-web:master] 1 new commit

a3de632 safari fix - def-

<heinrich5991> deen: although the server select()s while empty, but it still advances the game state

18:29

<heinrich5991> maybe it could stop doing that, to use less CPU

CrashtimeHD

[ddnet/ddnet-web] Pull request opened: #32 2nd safari fix

fixes the white areas in the fade overlay on safari (mobile)

snailx3

[ddnet-web:master] 1 new commit

1e4b7fc Update index.html - snailx3

19:40

snailx3

[ddnet-web:master] 1 new commit

77e316a Update index.html - snailx3

<keep> Hello, is there some ddnet devs ?

21:22

<heinrich5991> ask your question

21:25

<keep> well, i found by myself xD

21:25

<keep> it was stupid question