Adds a magma oceans region to the nether outside the existing nether caverns, which can be reached via tunnels.
Other misc changes:
* chatcomment nether_whereami, a debug aid for knowing which perlin-noise region you are in
* Nether ores no longer obtainable on the ceiling
* Move crafts into crafts.lua
* Add steam to lava cooling, and play bubbling lava upon death by lava
* Add cracked netherbrick
a decorative node which can only be obtained from dungeons or structures
I encourage someone to improve or replace the cracked netherbrick texture. For copyright purposes it's currently a derivative work (by me, 2020) from nether_brick.png, which is licensed under CC BY-SA 3.0 by PilzAdam, so it can fall under the "All other media" PilzAdam's credit in readme.md rather than need its own entry.
* textures for new tool items
* axe, shovel, pick, sword based on nether
* run also tools.lua
* Textture for Compressed Netherbrick
* new node "Compressed Netherbrick"
* define how to craft "Compressed Netherbrick"
* change recipe for NetherLump and remove old node
* Delete nether_nether_compressed.png
Portals will now fail to ignite instead of defaulting to a fallback depth of (starty - 256) when no unprotected target can be found.
The search depth is also increased from (starty - 256) to (starty - 646)
This is to properly handle large protected areas that are sometimes set up at spawn - see issue #26
* respect protected areas when spawning remote portals
* Use portal_shape to determine area to check for natural/protected
* Log warning on deprecated function call
Prevents the c++/native mapgen from placing ores or decorations (when useBiomes is true).
The biomes-based implementation is faster, more deterministic, and keeps its dungeons, but requires MT 5.1 features to work.
Also
* Glowstone & Netherrack stalactites
* Include the new decorations in mapgen_nobiomes
* Decorate dungeons - Add windows and glowstone "chandeliers" to some rooms
* Configurable Nether floor and ceiling depths
The second argument of minetest.settings:get_bool is the default value (for when the configuration value is not set). Remove the superfluous `or nether.NETHER_REALM_ENABLED` which rendered the config option useless, because it always forced the variable to true.
32affba6 re-registered stairs which have already been registered 20 lines earlier in the code, and registered them as "brick" causing the netherbrick stairs to replace Minetest's default:brick stairs. The rest of 32affba6 was already unrolled in 7a0e52da, but the stairs bug remained.
Currently proof of concept: Removes wormhole colour from .png texture and specifies it through MT API instead. The post_effect_color may call for registering a separate node per portal colour.
Palette 0 will have to be the traditional portal magenta (instead of 0 being black) for map compatibility with mod when colour was in the texture and not param2.
While it's rather cute having portals that share parts of their frame with other portals, the way the nether mod implemented portals means a node being part of more than one portal enables a family of bugs.
Igniting a portal now extinguishes any portal that was using nodes now taken by the newly ignited portal.
Allows dev and testing/debugging to focus on one (shape or behavior) without getting mixed up in the other, will also enable different portal shapes later on. Other adjustments:
* Reuse/reignite an existing portal or portal frame if there is one at the remote destination, rather than the area being overwritten by a slightly offset portal schematic.
* Create remote portals in a matching orientation to the local portal.
* Preserve player position & facing relative to portal when traveling through wormhole (even if portals are at 90°)
* Players no longer bounce several times after teleporting
* Player is not teleported until after the portal at the other end is confirmed/built
32affba6 re-registered stairs which have already been registered 20 lines earlier in the code, and registered them as "brick" causing the netherbrick stairs to replace Minetest's default:brick stairs. The rest of 32affba6 was already unrolled in 7a0e52da, but the stairs bug remained.
Reuse a single table for content ids to reduce memory use.
Add DEBUG parameter to control printing of mapchunk generation time,
set to false as default.
Add missing noise parameters (parameters are default and unchanged).
Large caverns using squashed 3D noise
Less lava, more glowstone, no air pockets
Preserve nether dungeons
Allow light to spread from glowstone and make brighter
Fix 'is ground content' settings, portals should not be
excavated by overgenerated caves
Rack drops itself as normal
Make brick, fence, stair, slab groups consistent
Use 'node sound gravel defaults' for sand
Make brick crafting consistent with default
Make fence recipe output number consistent with default
Make 'emerge area' volume mimimum required size
Add 'find nether target y' function to search for a cavern
floor with space above for nether portal spawn
