IRC log for #minetest, 2018-05-03

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07:29	DrFrankenstone	Is there a way in lua for a node to know when a block next to it has changed (like BUD switches in Minecraft), or would this be achieved with ABM polling?
07:31	sfan5	polling sounds like a bad idea performance-wise, using register_on_placenode/dignode might be better
07:32	sfan5	(though that won't cover all possible changes, so polling is the last alternative)
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07:36	DrFrankenstone	register_on_placenode can probably be bent to the task
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11:36	andirc8000	Can someone help me please I want a node to be destroyed with a single punch (and only one node and not the nodes behind it) so here is my modification of oneclick mod (or is it the original one (?)): https://hastebin.com/veruyoyujo.lua it works fine but it destroys sometimes 2 nodes at once
11:38	andirc8000	what If I "punched" a node with "almost infinite" strength instead? Would it still unnecessarily destroy the node behind it?
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11:39	andirc8000	instead of using remove_node(pos) *
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13:25	andirc8000	anyone?
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14:24	ANAND	??
14:24	tggt	how to go on ctf IRC?
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15:52	greeter	greetings. got a mod's question. a friend of mine and i are both running our own servers. on his, he can dye stone bricks different colors, but on mine i can't. i thought unifieddyes was the mod i was missing but it still doesn't work. any ideas how to get that working?
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15:55	Krock	greeter, craft a colored stone brick on his server and use the F5 information to find out how the node is called
15:55	Shara	greeter: half-guessing, but maybe colormachine?
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15:56	Krock	that will also tell you the mod which is required to add the colored stone (usually)
15:56	greeter	ah great thank you kindly
15:56	Shara	I was going to say that, then realise it might be registering it through something, so not showing the right name :P
15:57	Shara	You can also check which mods are running on their server
15:58	greeter	i'm looking at that, but i have almost all the same mods they do, the ones that are different have nothing to do with colors
15:59	greeter	at first i thought maybe they had a more up to date unifieddyes but that update didn't work lol
15:59	Shara	Are both servers public?
15:59	greeter	no, mine is but his is locally run
16:00	Krock	also watch out for mod conflicts or errors in your server's debug.txt - maybe some dependencies weren't satisfied
16:00	Krock	i.e. mods weren't loaded even though you marked them as to-load in the world configuration file
16:03	Shara	Can I ask which is yours? (randomly curious)
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16:04	greeter	i'll notice you the details. also i'll check that out Krock
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16:10	Krock	Shara, it's a secret..? :P
16:11	Shara	Seems like :)
16:11	Krock	Shara, heh, looks like you've found him
16:11	Krock	ravenchat creative ?
16:12	Shara	Who knows?
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16:13	Krock	Me!
16:19	greeter	yeah that's it, i just didn't want it to be construed as spamming is all, but it's no secret
16:20	Shara	I don't think it's spamming when directly asked :)
16:22	greeter	https://forum.minetest.net/viewtopic.php?id=2574 umm i think there's a problem with the images here :\
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17:04	Vanta	Hey guys, I have this tiny code snippet https://pastebin.com/F37kG3CN I'm trying to decorate underground caverns with schematics, but for some reason they never spawn, though function returns true
17:04	Vanta	I mean it's just an example code
17:04	Vanta	There are 2 lines, one replaces blocks and seconds spawns schematics. Block replacement works just fine
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17:23	Krock	Vanta, A problem I can see there is the mod security: If you run this code outside of the default mod, then it may not have access to that file.
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17:26	Vanta	It would report that, that it can't access the file
17:26	Vanta	Instead, function finishes without any problems and returns true value
17:29	Krock	just looked up the code. it doesn't check whether the mod has access to the schematic or not
17:29	Krock	but you're only passing "vm" to the placement function
17:29	Krock	this means "data" stays unlatered
17:30	Krock	*unaltered
17:30	Krock	afterwards you're kinda overwriting the placement: vm:set_data(data)
17:31	Krock	i.e. you can't use data[vi] = foobar and place_schematic_on_vmanip in the same loop
17:32	Krock	^ Vanta (just to notify)
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17:34	Vanta	Well I put data[vi] just for example, it didn't work anyway without it, anyway place_schematic_on_vmanip should overwrite that action anyway
17:36	Krock	well yes. should, but doesn't because the code tells otherwise
17:38	Krock	"data" is Lua-only and the C++ side does not update it when placing a schematic directly into the vmanip
17:38	Vanta	I see
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17:45	Vanta	So I should make another separate loop that doesn't write anything to voxel manipulator, for spawning schematics?
17:46	Vanta	I mean not setting vm data and neither writes anything to map
17:49	Krock	To still get the same effect, you can 1) get the vm data 2) data[vi] = foobar in the loop & cache the positions to a new table 3) set data 4) discard data 5) loop through the cached positions
17:49	Krock	.. and place the schematics
17:50	Vanta	I see, I guess that's why people place empty nodes with schematic spawning abms instead, haha
17:51	Krock	they should rather use node timers instead of abms - it also spreads the load on the server, i.e. reduces the on-generate lag
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17:59	Vanta	Big thanks for help
18:00	Krock	!next
18:00	MinetestBot	Another satisfied customer. Next!
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18:59	Vanta	Another question: how can I do operations (for example cave decoration) after it's already been generated? Here is an example snippet, https://pastebin.com/vZrAyZpj
18:59	Vanta	It never passes the check if node is air
18:59	Vanta	I can only assume that at the moment of execution caves are not generated yet and everything is stone
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19:20	paramat	Vanta see https://github.com/paramat/planets/blob/c325020d994644786a51967d3776b97d82f46029/init.lua#L396 for an example
19:22	paramat	use 'place schem on vmanip' between 'set data' and 'write to map', and create a table of positions between 'get data' and 'set data'
19:22	paramat	as Krock advised
19:24	swift110	hey all
19:28	paramat	Vanta in your 2nd code paste, you are not changing 'ivm' in the y loop
19:29	paramat	the loop is better in ZYX order, then you can just do ivm = ivm + 1 in the x loop
19:33	Vanta	Yes, I've noticed, I just copypasted this from somewhere
19:34	Vanta	It still wouldn't work though, because I'm testing if content_id is default:air
19:34	Vanta	While it should be just "air"
19:34	paramat	yes
19:35	paramat	anyway, in 'on generated' everything has been generated, including caves
19:35	Vanta	Well, I had "working" snippet before that did detect stone but didn't detect air, so I came to this false conclusion that caves are generated later
19:36	Vanta	And tried altering the code, searched for examples, came up with the snipped you've seen, but all this time I've been checking for wrong node id
19:38	Vanta	Why I should just make another loop only for placing decorations? Perfomance reasons?
19:38	Vanta	should'nt*
19:38	Vanta	I mean schematics
19:40	paramat	because 'place on vmanip' adds a schem to 'vm', not 'data'. so in your paste when you did 'set data (to vm)' you were overwriting the schems you had added to 'vm'
19:40	Vanta	No, I mean completely separate loop that just does place_schematic_on_vmanip
19:40	Vanta	Without setting and writing to map vm data
19:45	Vanta	https://pastebin.com/QZ0jdCdU
19:45	Vanta	This for example
19:45	Vanta	It works for me
19:45	paramat	ah you mean using 'place schematic' instead?
19:45	Vanta	no, using place_schematic_on_vmanip
19:47	paramat	ok yes just saw the paste
19:48	paramat	i can't see how that paste works, you never write the vm to map after adding the schematics
19:49	Vanta	I don't know either, but it does exactly what I want, on first loop it adds floating bush leaves to air, on second loop it spawns trees on stone nodes
19:50	paramat	plus you have already looped through the mapchunk already, doing it twice may be pointless, might as well create a table of positions n the first loop
19:50	paramat	hm weird :)
19:51	Vanta	Well yes that's why I had doubts about that eariler
19:55	Vanta	https://imgur.com/a/eDnSeWY it's dark and trees are too dense (1/5 chance of spawn) but they are clearly spawned
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20:03	Krock	don't pass "data" to write_to_map
20:03	Krock	and move write_to_map below the 2nd 3D-loop
20:03	Krock	that should solve the lighting issues IIRC
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20:10	paramat	"don't pass "data" to write_to_map" yes, that's a common mistake started by a mistake in hmmmm's lvm example
20:11	paramat	even if it works it's still bad code ;)
20:12	Vanta	Well anyway now I have read voxel manipulator wiki page and seen methods
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20:14	Gael-de-Sailly	you should define your content_id once, at beginning
20:14	Gael-de-Sailly	avoid using it in the loop, it takes time
20:14	Vanta	It's just a test example
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20:31	paramat	the wiki page is probably out of date and misleading. i made a thread in the news forum with a good example
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22:23	MineLord	Is there a way to have multiple admin accounts for a server?
22:28	ThomasMonroe	yes
22:28	ThomasMonroe	just grant them 'all' :P
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22:32	MineLord	Thanks
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