| Time |
Nick |
Message |
| 00:11 |
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| 00:41 |
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| 02:05 |
paramat |
4 hrs bug tracing, getting close: https://github.com/minetest/minetest/issues/7570#issuecomment-406762640 |
| 02:24 |
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| 07:25 |
nerzhul |
i push an android build update |
| 07:26 |
nerzhul |
merging #7563 |
| 07:26 |
ShadowBot |
https://github.com/minetest/minetest/issues/7563 -- Disable shaders GUI on unsupported drivers by numberZero |
| 08:14 |
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| 10:09 |
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| 10:10 |
lhofhansl |
Just merged #7555 (sorry forgot to send a note here first) |
| 10:10 |
ShadowBot |
https://github.com/minetest/minetest/issues/7555 -- Reduce ABM checks. by lhofhansl |
| 10:12 |
lhofhansl |
Also updated #7544 |
| 10:12 |
ShadowBot |
https://github.com/minetest/minetest/issues/7544 -- Allow an optional readonly base database by lhofhansl |
| 10:37 |
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| 10:53 |
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| 11:02 |
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| 11:09 |
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| 11:15 |
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| 11:44 |
p_gimeno |
Krock: your coding lacks an implicit '1' bit at the start of the mantissa, that's probably why you can't encode large numbers. You have redundant encodings, so you can't encode every float number that way. |
| 11:48 |
Krock |
the mantissa and exponent are both signed integers in this case. mantissa with 23 bits and the exponent with 9 bits |
| 11:50 |
Krock |
and there's a loss because the exponent is not shifted by 127 as in the IEEE format |
| 11:51 |
Krock |
the sign bit in the IEEE float format is already included in the mantissa here |
| 12:05 |
p_gimeno |
by redundant encodings I mean that you can encode 1 as e.g. mantissa 1 exponent 0, or mantissa 2 exponent 1 |
| 12:05 |
p_gimeno |
err |
| 12:05 |
p_gimeno |
I mean or mantissa 2 exponent -1 |
| 12:06 |
p_gimeno |
gtg now, back in ~1h |
| 12:12 |
Krock |
oh, I see what you meant. Combinations that result in the same value |
| 12:26 |
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| 13:26 |
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| 13:27 |
p_gimeno |
yes, meaning you can't have a 1:1 mapping |
| 13:30 |
p_gimeno |
the implicit '1' in the mantissa solves that issue, it's only absent for denormals |
| 13:30 |
p_gimeno |
whether to support denormals is a different question... it's probably not worth the trouble |
| 13:44 |
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| 15:00 |
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| 16:01 |
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| 16:11 |
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| 16:13 |
lhofhansl |
Any ideas on #7573? |
| 16:13 |
ShadowBot |
https://github.com/minetest/minetest/issues/7573 -- Android fog color does not match sky color |
| 16:15 |
lhofhansl |
Looks like the far cloud box is simply not drawn. Looking at the code there's no difference there for Android. |
| 16:27 |
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| 16:30 |
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| 16:35 |
snowmondaykernel |
Good day! I have mod update that is impotant but wasn't accepted by mod developer. I have no github account. Can someone host a mod for me on github? |
| 16:35 |
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| 16:40 |
red-001 |
snowmondaykernel, talk about that sort of stuff on #minetest , #minetest-dev is for core dev |
| 16:40 |
red-001 |
and second you can just make an account |
| 16:40 |
red-001 |
all you really need is an email address and 5 minutes |
| 16:43 |
snowmondaykernel |
red-001, where can you get an email address without using phone number? |
| 16:44 |
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| 16:51 |
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| 16:55 |
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| 16:59 |
Krock |
p_gimeno: I saw the git repo and the SO question, but I'm not sure whether we want such a sophisticated way to transmit float values. It's also a matter of speed |
| 17:13 |
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| 18:17 |
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| 19:16 |
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| 19:53 |
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| 20:32 |
paramat |
game#2150 |
| 20:32 |
ShadowBot |
https://github.com/minetest/minetest_game/issues/2150 -- Beds: Add white simple and fancy beds by paramat |
| 20:39 |
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| 20:45 |
p_gimeno |
Krock: I understand, but the point here is that such code would be a fallback for machines where floats are not IEEE-compliant, which would probably be zero of the machines supported by Minetest. The speed impact would apply to machines that don't have IEEE floats. I think it's a fair compromise, given how unlikely it is that any such machine can even run Minetest. |
| 20:49 |
p_gimeno |
See https://stackoverflow.com/questions/2724359/are-there-any-modern-platforms-with-non-ieee-c-c-float-formats about machines without IEEE floats. Summary: some embedded systems (where Minetest can't run), some old GPUs (where Minetest can't run), and that's about all. |
| 20:50 |
Krock |
how about fast math? |
| 20:51 |
Krock |
I'm however not sure what tricks GCC uses to speed things up |
| 20:51 |
p_gimeno |
I'm thinking in terms of network exclusively. If you mean whether fast math uses IEEE floats, yes it does. It may omit denormal support, though, among other things. |
| 20:52 |
p_gimeno |
But lacking denormal support would mean that you would never get a denormal to transmit over a network, and that if you got a denormal from a network, it would be automatically truncated to zero. |
| 20:54 |
p_gimeno |
One area of concern is endianess. You'd need to have several different functions to handle several different kinds of endianess. |
| 20:54 |
p_gimeno |
er, endianness* |
| 20:57 |
p_gimeno |
I think there are 4 combos to support: 0 1 2 3, 3 2 1 0, 2 3 0 1, 1 0 3 2 |
| 20:58 |
Krock |
the network code already handles this for integers |
| 20:59 |
p_gimeno |
the situation is a bit worse for floats, in that they don't necessarily have the same endianness as integers, and there's no hton for floats |
| 21:49 |
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| 22:53 |
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