[Mod] Tunnel and magma networks [0.4.0] [intersecting]

[paramat]

Download https://github.com/paramat/intersecting ... master.zip and rename folder to 'intersecting'
Code https://github.com/paramat/intersecting

intersecting 0.4.0 by paramat
For Minetest 0.4.12 and later
Depends default
Licenses: Code WTFPL, textures CC BY-SA 3.0

Unlimited tunnel and magma tunnel networks created from 3D noise.
3D underground 'biomes', each with a differing mix of 2 intersecting tunnel systems, the biomes create a few dead ends.
Mostly separate from this is a larger scaled magma tunnel network, if these magma tunnels come to surface in water, default lavacooling creates obsidian tubes.
Optional glowing lux ore craftable with 8 glass nodes to 8 lights, lux ore also spawns in desert dungeon walls.
You can use this with or instead of normal caves, disabling normal caves ('mg_flags = nocaves' in .conf) removes the lava caves and some features in the landscape.

[HeroOfTheWinds]

Neat mod! Nice to have a ready-made path to get down to the good ores. ;)

Interesting how we both are working on underground mods right now... (see the screenshot in the screenshots thread)
I'll be lucky if I have the beta version up tonight, though....

[Inocudom]

Neat mod! Nice to have a ready-made path to get down to the good ores. ;)

Interesting how we both are working on underground mods right now... (see the screenshot in the screenshots thread)
I'll be lucky if I have the beta version up tonight, though....

Of course, you are working on large subterranean realms.

[Krock]

Noticed some rubbish from other mapgens while looking at the codes :P
https://github.com/paramat/intersecting ... it.lua#L76

[paramat]

Version 0.2.1

Since each tunnel is the overlapping volume of 2 narrow bands of 3D noise, and since a fissure is a narrow band of 3D noise, it's possible to switch the 3D noises to create fissures, and also differing combinations of tunnels and fissures. I added a large spread (2048 node) 3D 'biome' noise to create 7 combinations of 3 types:
2 fissures.
1 fissure, 1 tunnel system.
2 tunnel systems.
As the fissures are quite destructive to the surface they are the smallest biomes. On a very large scale, the fissure biomes form narrow twisting sheets around the larger less fractured volumes of tunnel biomes.
Having biomes creates a few tunnels with dead ends.
One tunnel or fissure will always continue into an adjacent biome, creating a connected network.

Water plugs are 16 node vertical columns of sand.
Anytime default:tree is removed, the whole trunk above and below is erased too, to avoid floating trees.
Any sand, dirt or grass at or below y = 2 is not removed by this mod, to make fissures pass under lakes with almost no trace, and no floods.

[Desour]

wow

[paramat]

Version 0.2.3
Added optional glowing lux ore spawning in stone and desert stone (and therefore in desert dungeon walls).
Water plugs changed to stone, looks better, also stable unlike sand.

[paramat]

Version 0.3.1
Fissures are removed as the tunnels themselves often form fissure shapes. Now there are 4 3D noises creating 3 linked tunnel systems, one system is filled with default:lava to create a magma network, where these occasionally surface in water Minetest lavacooling creates obsidian lava tubes. Now you can disable caves (mg_flags = nocaves) and still have lava.

[paramat]

Version 0.3.2

Now there are six 3D noises, three of these create two intersecting tunnel systems with tunnel junctions, one is a biome noise that creates three underground biomes, each with a different mix of two tunnel systems, this intentionally creates some dead end tunnels.
The remaining two noises create a mostly separate and larger-scaled magma tunnel system that occasionally intersects the tunnel systems. When these magma tunnels surface in water Minetest's default lavacooling creates obsidian lava tubes, when they intersect the caverns of subterrain mod the lava will spread creating lava caverns.
So now you can disable Minetest's default cave generation ('mg_flags = nocaves' in minetest.conf) and still have lava and lava caverns.

[paramat]

Version 0.4.0
Add emerlen, emerarea. Add missing sand declaration. Noise object optimisation. Add 'paramtype = light' to light sources. Add sandstone detection for mgv5/mgv7. Fix code style issues. Add info to readme

Use of noise has been optimised and should run a little faster.

[Nathan.S]

Really cool stuff. I'd somehow missed this mod until the last update.

[burli]

Is it possiple to "reduce the third dimension"? This mod generates nice tunnels, but to much of them go steep vertical down. I would like to have more horizontal tunnles with more intersections

[burli]

Hm, I guess there is a memory leak or something. This mod crashes the second time with the message "Not enouth memory"

Code: Select all

2016-04-09 08:38:02: ERROR[Main]: ServerError: Lua: OOM error from mod 'intersecting' in callback environment_OnGenerated(): not enough memory
2016-04-09 08:38:02: ERROR[Main]: Current Lua memory usage: 1011 MB

[paramat]

I should mention this mod has a heavy use of 3D noise, heavier than any core mapgen, and in lua mapgen noise uses large amounts of memory. LuaJIT has a low memory limit which causes OOM errors, so try using normal Lua.

You can squash or stretch the tunnel structure by adjusting the Y spread of the 3D noises.
For np_weba to np_webe try:
spread = {x = 192, y = 96, z = 192},
Or whatever value of Y spread you prefer. 96 means the structure will be squashed in a ratio 2:1.
Squashing will squash tunnel height so you may need to increase tunnel width TTUN to keep them walkable.