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| 04:28 |
Blockhead256 |
while we're on the topic of bad physics: there's no terminal velocity for a falling player, you just accelerate until you hit either the bottom or a block the server hasn't managed to load in time |
| 04:37 |
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MTDiscord |
<warr1024> I have the crappiest workaround for that, but just adding air resistance to the player's "gravity" to control their net acceleration. It doesn't work in any direction other than falling though, and doing it for non-player entities is completely inconsistent. |
| 05:42 |
lissobone |
Well, I have already added air resistance |
| 05:43 |
lissobone |
(Like, actual one) |
| 05:43 |
lissobone |
That works in ALL directions |
| 05:46 |
lissobone |
The formula for aerodynamic drag is R = ρCAv^2, where 'R' is drag, 'ρ' is density of fluid, 'C' is a measureless constant that depends on shape and material of the moving body, 'A' is attacked surface area and 'v' is velocity |
| 05:47 |
lissobone |
'v' can be provided as a vector to the formula, then divided by 'dtime' and passed to player:add_velocity every globalstep (that's what I did) |
| 05:48 |
lissobone |
That doesn't solve the doubled acceleration, though |
| 05:50 |
lissobone |
But, in reality... a minetest world with no mods whatsoever is supposedly devoid of everything, even atmosphere, so it's logical for there to be no terminal velocity |
| 05:53 |
MTDiscord |
<jordan4ibanez> What if |
| 05:53 |
MTDiscord |
<jordan4ibanez> We just make the player and the entity use the same physics subroutine |
| 05:54 |
MTDiscord |
<jordan4ibanez> I'm pretty sure they're derived from the same class and if they're not they should be |
| 06:02 |
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| 06:02 |
lissobone |
(That means entities would also have to have physics overrides... and mimicking their default behavior would require setting it to {gravity = 0, speed_crouch = 0, speed = 0}) |
| 06:04 |
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| 06:13 |
MTDiscord |
<jordan4ibanez> Yes exactly |
| 06:13 |
MTDiscord |
<jordan4ibanez> But not quite |
| 06:15 |
MTDiscord |
<jordan4ibanez> Because the player only inherits the generic implementation of an entity, it can use polymorphism to change what it does with that. And it can be a singleton instance on the client which then becomes a zeitgeist of when you join servers |
| 06:15 |
MTDiscord |
<jordan4ibanez> Entities could, in theory, have this to mimic, or they could not use the player's implementation at all |
| 06:30 |
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| 07:04 |
lissobone |
Okay... Let's get back to the topic of doubled acceleration |
| 07:05 |
lissobone |
I hypothesize that it was done to make jumping... a little more comfortable, because with actual 9.81 m/s^2 it feels a little off |
| 07:05 |
lissobone |
But why double it?? Why not make just modify the default value from settings? Oh, hey, that's a good solution |
| 07:07 |
lissobone |
I declare that mercy of the new absolute, the default acceleration in settings should be 2g (19.62 m/s^2), and that doubling 'hack' is to be erased from existence as an insult to laws of physics |
| 07:17 |
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| 07:23 |
MTDiscord |
<jordan4ibanez> So it gives people something to complain about |
| 07:23 |
lissobone |
There isn't really anything to complain about... All this time free fall acceleration was 19.62 m/s^2, and it will stay this way |
| 07:24 |
MTDiscord |
<jordan4ibanez> Oh yes there is |
| 07:24 |
MTDiscord |
<jordan4ibanez> It's poop |
| 07:24 |
lissobone |
(Why would anyone complain about it??) |
| 07:24 |
MTDiscord |
<jordan4ibanez> Someone worked very hard to break that code and it would be a disservice to them not to complain about it |
| 07:25 |
lissobone |
Well! Let's complain, then |
| 07:25 |
MTDiscord |
<jordan4ibanez> I think it makes no sense and should be reverted |
| 07:25 |
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| 07:25 |
lissobone |
Yeah, it should |
| 07:25 |
lissobone |
(I am complaining) |
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MTDiscord |
<jordan4ibanez> Maybe they'll finally allow someone to fix it after the freeze is done |
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