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IRC log for #minetest-dev, 2023-01-25

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Time Nick Message
01:35 lhofhansl joined #minetest-dev
01:36 lhofhansl Hello. Merging #13155 (trivial)
01:36 ShadowBot https://github.com/minetest/minetest/issues/13155 -- Display whole profiler numbers up to 999999 without scientific notation. by lhofhansl
01:40 lhofhansl And... Done. :)
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06:35 lhofhansl Is x2048 around?
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17:56 appguru merging game#2965 in 5 min
17:56 ShadowBot https://github.com/minetest/minetest_game/issues/2965 -- Ensure chests close properly by fluxionary
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18:06 MTDiscord <x2048> lhofhansl: I am on and off via Discord, usually check chats around this time.
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20:07 MTDiscord <MisterE> @x2048 what would you think of adding a no_render node drawtype..., you would see no geometry behind it, only the skybox.
20:08 MTDiscord <MisterE> It would accept textures with transparency
20:08 MTDiscord <MisterE> For the node, that is
20:10 sfan5 usecase?
20:18 pgimeno hm, one I can think of is making sub-worlds at different levels, using a "roof" to prevent them to be rendered
20:21 MTDiscord <MisterE> That is one particular usecase yes, to avoid the hack of having to space out levels beyond render distance. The other usecase is for portals... imagine a pool in the ground, through which you can see a starfield (the lower part of the skybox). You step into it...
20:21 celeron55 in a custom built world you might want to hide a piece of the level while already having it loaded (for convenience)?
20:22 MTDiscord <MisterE> yes
20:23 MTDiscord <MisterE> For gamejam type games, you could have all the levels near each other inside boxes of this node drawtype, and while inside each box, you would not see the other nearby levels
20:25 MTDiscord <MisterE> One issue with minigame levels is keeping levels (or minigame arenas on aes for that matter) far enough away that you can't see them from other levels.
20:26 MTDiscord <luatic> Such a drawtype would require a separate rendering pass or a stencil buffer, wouldn't it?
20:26 MTDiscord <x2048> Can we achieve the same by having api for render boundaries?
20:27 MTDiscord <x2048> Right now it's hardcoded at +- view range in all directions
20:29 MTDiscord <MisterE> Well, that doesn't achieve the portal effect, but maybe thats better done with some other approach, and your idea would be sufficient for the other usecases (if you have per-axis or position-range control)
20:30 MTDiscord <MisterE> Imo, actually, the position range control would be better than per-axis control
20:30 MTDiscord <MisterE> But.. what if the area is already loaded?
20:33 MTDiscord <MisterE> What if, I have two arenas next to each other, bounded by a box for each, and you should see only skybox beyond that box while inside the arena. I go to one arena, load it, the go to the other arena, and load it... we need to make sure that it will stop displaying the old arena that I left as I enter the new one
20:34 MTDiscord <MisterE> The specific behavior would be lua defined of course, I'm just concerned that the api allow you to say 'the client should see no geometry outside this range' or something like that
20:35 MTDiscord <x2048> You can have API set_render_limit(aabb3d) that defines absolute boundaries for what's rendered up to a  mapblock. When you enter any arena just set the right bounding box to hide the others
20:36 MTDiscord <MisterE> Nice
20:36 celeron55 basically define the rendered volume by absolute node coordinates
20:36 MTDiscord <MisterE> ^
20:37 celeron55 that seems fairly general purpose and very lightweight to implement
20:37 MTDiscord <x2048> And it would intersect with pos+viewrange
20:37 MTDiscord <MisterE> Well, that doesn't do portals, but hey, its a step in the right direction. I still might like a way to do special scenes behind a node, but that should be a different feature.
20:38 MTDiscord <MisterE> Id like minecraft end portals ­čÖé
20:38 MTDiscord <x2048> By portals you mean special node shader?
20:39 MTDiscord <MisterE> No. A way to not show normal geometry behind a node, but show a special scene behind it... maybe just a skybox, or maybe more complicated geometry
20:39 MTDiscord <x2048> It's like a world-aligned texture with parallax?
20:40 MTDiscord <MisterE> Maybe something similar could be done with the camera api and entities, so maybe its already coming
20:40 celeron55 the definition seemed to be "seeing the sky(box) by looking at special nodes which may have other stuff behind them, which wouldn't then be seen"
20:40 MTDiscord <MisterE> ^
20:41 MTDiscord <x2048> I would not pursue that specific definition
20:41 celeron55 that doesn't seem as general purpose and not sure what that would take to implement
20:41 MTDiscord <x2048> MC end portal is just a shader
20:42 MTDiscord <MisterE> Although, idk that it should be the skybox persay, but some kind of visual effect. Anyhow, lets forget that... the hiding geometry with  lua-defined coordinates is much more general purpose and needed
20:42 MTDiscord <MisterE> And sane
20:42 celeron55 shader defined tiles (tile is basically what MT calls a node face) could make sense. could be a compatibility nightmare though, and someone could consider it to be a security nightmare also
20:43 MTDiscord <x2048> they are
20:44 celeron55 instead there could be a library of pre-made effects to choose from. not sure how general purpose that could be
20:45 MTDiscord <x2048> just like textures, shaders can be named and be a part of texture/resource packs
20:47 MTDiscord <x2048> then it's a different type of compatibility headache
20:49 MTDiscord <MisterE> Fun
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