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Cavegen/Mgv5/Mgv7: Add optional giant caverns

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Add to MapgenBasic for use by multiple mapgens.
Add to mgv5 and mgv7, enabled by default.

Similar to mgvalleys caverns but half the scale.
Parameters for upper y limit, distance caverns taper to full size, and
noise threshold (full cavern size).
As with mgvalleys caverns are generated first and classic caves are
disabled in any mapchunk containing a cavern, to avoid excessive
spreading volumes of liquids.
This also avoids floating blobs of liquid where a large classic cave
has overgenerated out into a neighbouring previously-generated mapchunk.
This commit is contained in:
paramat 2017-03-12 13:26:09 +00:00
parent 86b1542181
commit 859141a0ce
10 changed files with 303 additions and 54 deletions
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10
src/mapgen_v5.h
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@ -25,6 +25,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define MGV5_LARGE_CAVE_DEPTH -256
///////// Mapgen V5 flags
#define MGV5_CAVERNS 0x01
class BiomeManager;
extern FlagDesc flagdesc_mapgen_v5[];
@ -33,12 +36,17 @@ extern FlagDesc flagdesc_mapgen_v5[];
struct MapgenV5Params : public MapgenParams {
u32 spflags;
float cave_width;
s16 cavern_limit;
s16 cavern_taper;
float cavern_threshold;
NoiseParams np_filler_depth;
NoiseParams np_factor;
NoiseParams np_height;
NoiseParams np_ground;
NoiseParams np_cave1;
NoiseParams np_cave2;
NoiseParams np_ground;
NoiseParams np_cavern;
MapgenV5Params();
~MapgenV5Params() {}