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Ores: Add stratum ore (#6352)

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Creates a single undulating ore stratum that is continuous across mapchunk
borders and horizontally spans the world.
Due to being continuous is ideal for creating bands of alternative stone
type running through cliffs and mountains, or underground layers.

Add missing documentation of 'ore_param2' parameter.
This commit is contained in:
Paramat
2017-09-03 21:32:21 +01:00
committed by Loïc Blot
parent 5bef339388
commit 9f6d90aa81
4 changed files with 105 additions and 1 deletions
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19
doc/lua_api.txt
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@ -1069,7 +1069,6 @@ within the currently generated chunk.
The vertical top and bottom displacement of each puff are determined by the noise
parameters `np_puff_top` and `np_puff_bottom`, respectively.
### `blob`
Creates a deformed sphere of ore according to 3d perlin noise described by
`noise_params`. The maximum size of the blob is `clust_size`, and
@ -1099,6 +1098,22 @@ to small changes. The following is a decent set of parameters to work from:
**WARNING**: Use this ore type *very* sparingly since it is ~200x more
computationally expensive than any other ore.
### `stratum`
Creates a single undulating ore stratum that is continuous across mapchunk
borders and horizontally spans the world.
The 2D perlin noise described by `noise_params` varies the Y co-ordinate of the
stratum midpoint. The 2D perlin noise described by `np_stratum_thickness`
varies the stratum's vertical thickness (in units of nodes). Due to being
continuous across mapchunk borders the stratum's vertical thickness is
unlimited.
`y_min` and `y_max` define the limits of the ore generation and for performance
reasons should be set as close together as possible but without clipping the
stratum's Y variation.
Each node in the stratum has a 1-in-`clust_scarcity` chance of being ore, so a
solid-ore stratum would require a `clust_scarcity` of 1.
The parameters `clust_num_ores`, `clust_size`, `noise_threshold` and
`random_factor` are ignored by this ore type.
Ore attributes
--------------
See section "Flag Specifier Format".
@ -4558,6 +4573,8 @@ Definition tables
{
ore_type = "scatter", -- See "Ore types"
ore = "default:stone_with_coal",
ore_param2 = 3,
-- ^ Facedir rotation. Default is 0 (unchanged rotation)
wherein = "default:stone",
-- ^ a list of nodenames is supported too
clust_scarcity = 8*8*8,