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Add VoxelArea support #34
Description
A helper class for voxel areas.
It can be created via VoxelArea:new{MinEdge = pmin, MaxEdge = pmax}.
The coordinates are inclusive, like most other things in Minetest.
Methods
getExtent(): returns a 3D vector containing the size of the area formed by
MinEdgeandMaxEdge.getVolume(): returns the volume of the area formed byMinEdgeand
MaxEdge.index(x, y, z): returns the index of an absolute position in a flat array
starting at1.x,yandzmust be integers to avoid an incorrect index result.- The position (x, y, z) is not checked for being inside the area volume,
being outside can cause an incorrect index result. - Useful for things like
VoxelManip, raw Schematic specifiers,
PerlinNoiseMap:get2d/3dMap, and so on.
indexp(p): same functionality asindex(x, y, z)but takes a vector.- As with
index(x, y, z), the components ofpmust be integers, andp
is not checked for being inside the area volume.
- As with
position(i): returns the absolute position vector corresponding to index
i.contains(x, y, z): check if (x,y,z) is inside area formed by
MinEdgeandMaxEdge.containsp(p): same as above, except takes a vectorcontainsi(i): same as above, except takes an indexiiter(minx, miny, minz, maxx, maxy, maxz): returns an iterator that returns
indices.- from (
minx,miny,minz) to (maxx,maxy,maxz) in the order of
[z [y [x]]].
- from (
iterp(minp, maxp): same as above, except takes a vector
Activity
S-S-X commentedon Oct 28, 2021
Content id allocation
https://github.com/minetest/minetest/blob/8dfeba02b9f084ddd52090ccd906534200f468b3/src/nodedef.cpp#L1161-L1179
Variable m_next_id is reset to zero. First id returned by allocateId is 1 effectively making content id 1 based.
S-S-X commentedon Jun 11, 2022
This should probably be using VoxelArea from engine core Lua libraries, VoxelArea class itself is just Lua helper and #74 already pulls that in when specified version is not "mineunit".
Having tests from #84 would probably still be useful even while it is engine library, tests would still allow some verification about Mineunit behavior.
Directory structure and loading of Minetest engine Lua libraries should be made better and more correct, when those were first added there was no plans to actually support many engine features.
Now things have changed a bit and a lot of Minetest c++ side things are already implemented. Mineunit is actually able to load significant amount of core Lua scripts and even pulls those directly from Minetest repo when asked to do so.