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| 01:31 |
paramat |
#8417 is now ready |
| 01:31 |
ShadowBot |
https://github.com/minetest/minetest/issues/8417 -- Stabilise 'day night ratio' to fix object brightness flicker by paramat |
| 01:38 |
p_gimeno |
hm... |
| 01:40 |
p_gimeno |
The instability probably comes from the formula for linear interpolation. That formula is not monotonic and has problems. I suggest an alternate formula here: http://math.stackexchange.com/questions/907327/accurate-floating-point-linear-interpolation |
| 01:45 |
p_gimeno |
applied to this case: return f < 0.5 ? values[i-1][1] + f * td0 : values[i][1] - (1.0 - f) * td0; |
| 01:47 |
p_gimeno |
sorry, make that 1.0f so there's no double rounding |
| 01:49 |
p_gimeno |
and 0.5f |
| 01:49 |
p_gimeno |
so with these fixes: return f < 0.5f ? values[i-1][1] + f * td0 : values[i][1] - (1.0f - f) * td0; |
| 01:52 |
p_gimeno |
hm, I've swapped the operands I think |
| 01:57 |
p_gimeno |
ah no I haven't, but it's not td0, it's like this: return f < 0.5f ? values[i-1][1] + f * (values[i][1] - values[i-1][1]) : values[i][1] - (1.0f - f) * (values[i][1] - values[i-1][1]); |
| 02:07 |
paramat |
what are the problems? that seems more intensive |
| 02:11 |
paramat |
hm not monotonic |
| 02:11 |
paramat |
i guess that might cause a blip when using very slow time speeds |
| 02:11 |
p_gimeno |
yeah it might oscillate at some other values |
| 02:12 |
paramat |
not sure, because the function converts to an integer when returning, so any blip might not have an effect |
| 02:13 |
p_gimeno |
also, it seems too easy a mistake to change the table and not realize the values below |
| 02:13 |
paramat |
maybe i can consider this in the follow up PR, which will be more suitable for such an improvement |
| 02:14 |
p_gimeno |
sure |
| 02:15 |
paramat |
that imperfect linear interpolation method is used a lot in MT and is more readable |
| 02:15 |
p_gimeno |
well, lerp(A, B, t) is even more readable |
| 02:15 |
paramat |
yes good point about changing the table values |
| 02:16 |
paramat |
i'll correct that |
| 02:16 |
paramat |
the monotonic issue, i guess any blip will be tiny? as it's due to flat imprecision? |
| 02:17 |
paramat |
*float |
| 02:17 |
p_gimeno |
yes but it might happen in the frontier of an integer if you're unlucky |
| 02:17 |
paramat |
hm yeah |
| 02:18 |
p_gimeno |
it was indeed happening at the endpoints |
| 02:18 |
paramat |
yeah =) |
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| 07:11 |
ANAND |
https://github.com/minetest/minetest.github.io/pull/165 |
| 07:13 |
ANAND |
!title |
| 07:13 |
ShadowBot |
customize.html: Fix outdated intro by ClobberXD · Pull Request #165 · minetest/minetest.github.io · GitHub |
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| 12:55 |
p_gimeno |
what is the 'high_precision_fpu' setting for? it seems unused to me |
| 13:08 |
sfan5 |
given to irrlicht on init IIRC |
| 13:09 |
sfan5 |
no idea what it does with that |
| 13:10 |
p_gimeno |
ah, thanks |
| 13:44 |
nerzhul |
hello team, i opened a PR about an android crash, i think it happens in some conditions when leaving world and/or app |
| 14:14 |
p_gimeno |
I see an issue but not a PR |
| 14:31 |
nerzhul |
oops :) yes an issue :D |
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| 16:49 |
nerzhul |
i just published a tiny maintenance PR for master |
| 16:49 |
nerzhul |
#8425 |
| 16:49 |
ShadowBot |
nerzhul: Error: Delimiter not found in "Connection timed out." |
| 16:49 |
nerzhul |
#8425 |
| 16:49 |
ShadowBot |
https://github.com/minetest/minetest/issues/8425 -- Cleanups around the mapgen init by nerzhul |
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| 20:02 |
clavi |
when using a Postgres backend, does it matter what locale the database is in? |
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| 21:04 |
sofar |
clavi: no, not for map data anyway |
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| 21:25 |
clavi |
ok thanks |
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| 23:36 |
paramat |
!seen ShadowNinja |
| 23:36 |
ShadowBot |
paramat: I saw ShadowNinja in #minetest-dev 1 year, 8 weeks, 4 days, 21 hours, 43 minutes, and 3 seconds ago saying "(The reason the server-side code is so bad is mainly because of compatability)" |
| 23:36 |
paramat |
god grief |
| 23:36 |
paramat |
*good |
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