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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
Download patch file Download diff file Expand all files Collapse all files

53
src/mapgen_v7.cpp
View file

@ -41,10 +41,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
FlagDesc flagdesc_mapgen_v7[] = {
{"mountains", MGV7_MOUNTAINS},
{"ridges", MGV7_RIDGES},
{"floatlands", MGV7_FLOATLANDS},
{NULL, 0}
{"mountains", MGV7_MOUNTAINS},
{"ridges", MGV7_RIDGES},
{"floatlands", MGV7_FLOATLANDS},
{"caverns", MGV7_CAVERNS},
{NULL, 0}
};
@ -60,6 +61,9 @@ MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge)
this->float_mount_height = params->float_mount_height;
this->floatland_level = params->floatland_level;
this->shadow_limit = params->shadow_limit;
this->cavern_limit = params->cavern_limit;
this->cavern_taper = params->cavern_taper;
this->cavern_threshold = params->cavern_threshold;
//// Terrain noise
noise_terrain_base = new Noise(&params->np_terrain_base, seed, csize.X, csize.Z);
@ -76,9 +80,10 @@ MapgenV7::MapgenV7(int mapgenid, MapgenV7Params *params, EmergeManager *emerge)
// 1-up 1-down overgeneration
noise_mountain = new Noise(&params->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
noise_ridge = new Noise(&params->np_ridge, seed, csize.X, csize.Y + 2, csize.Z);
MapgenBasic::np_cave1 = params->np_cave1;
MapgenBasic::np_cave2 = params->np_cave2;
// 1 down overgeneration
MapgenBasic::np_cave1 = params->np_cave1;
MapgenBasic::np_cave2 = params->np_cave2;
MapgenBasic::np_cavern = params->np_cavern;
}
@ -100,12 +105,15 @@ MapgenV7::~MapgenV7()
MapgenV7Params::MapgenV7Params()
{
spflags = MGV7_MOUNTAINS | MGV7_RIDGES;
spflags = MGV7_MOUNTAINS | MGV7_RIDGES | MGV7_CAVERNS;
cave_width = 0.09;
float_mount_density = 0.6;
float_mount_height = 128.0;
floatland_level = 1280;
shadow_limit = 1024;
cavern_limit = -256;
cavern_taper = 256;
cavern_threshold = 0.7;
np_terrain_base = NoiseParams(4, 70, v3f(600, 600, 600), 82341, 5, 0.6, 2.0);
np_terrain_alt = NoiseParams(4, 25, v3f(600, 600, 600), 5934, 5, 0.6, 2.0);
@ -118,6 +126,7 @@ MapgenV7Params::MapgenV7Params()
np_float_base_height = NoiseParams(48, 24, v3f(300, 300, 300), 907, 4, 0.7, 2.0);
np_mountain = NoiseParams(-0.6, 1, v3f(250, 350, 250), 5333, 5, 0.63, 2.0);
np_ridge = NoiseParams(0, 1, v3f(100, 100, 100), 6467, 4, 0.75, 2.0);
np_cavern = NoiseParams(0, 1, v3f(384, 128, 384), 723, 5, 0.63, 2.0);
np_cave1 = NoiseParams(0, 12, v3f(61, 61, 61), 52534, 3, 0.5, 2.0);
np_cave2 = NoiseParams(0, 12, v3f(67, 67, 67), 10325, 3, 0.5, 2.0);
}
@ -131,6 +140,9 @@ void MapgenV7Params::readParams(const Settings *settings)
settings->getFloatNoEx("mgv7_float_mount_height", float_mount_height);
settings->getS16NoEx("mgv7_floatland_level", floatland_level);
settings->getS16NoEx("mgv7_shadow_limit", shadow_limit);
settings->getS16NoEx("mgv7_cavern_limit", cavern_limit);
settings->getS16NoEx("mgv7_cavern_taper", cavern_taper);
settings->getFloatNoEx("mgv7_cavern_threshold", cavern_threshold);
settings->getNoiseParams("mgv7_np_terrain_base", np_terrain_base);
settings->getNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
@ -143,6 +155,7 @@ void MapgenV7Params::readParams(const Settings *settings)
settings->getNoiseParams("mgv7_np_float_base_height", np_float_base_height);
settings->getNoiseParams("mgv7_np_mountain", np_mountain);
settings->getNoiseParams("mgv7_np_ridge", np_ridge);
settings->getNoiseParams("mgv7_np_cavern", np_cavern);
settings->getNoiseParams("mgv7_np_cave1", np_cave1);
settings->getNoiseParams("mgv7_np_cave2", np_cave2);
}
@ -156,6 +169,9 @@ void MapgenV7Params::writeParams(Settings *settings) const
settings->setFloat("mgv7_float_mount_height", float_mount_height);
settings->setS16("mgv7_floatland_level", floatland_level);
settings->setS16("mgv7_shadow_limit", shadow_limit);
settings->setS16("mgv7_cavern_limit", cavern_limit);
settings->setS16("mgv7_cavern_taper", cavern_taper);
settings->setFloat("mgv7_cavern_threshold", cavern_threshold);
settings->setNoiseParams("mgv7_np_terrain_base", np_terrain_base);
settings->setNoiseParams("mgv7_np_terrain_alt", np_terrain_alt);
@ -168,6 +184,7 @@ void MapgenV7Params::writeParams(Settings *settings) const
settings->setNoiseParams("mgv7_np_float_base_height", np_float_base_height);
settings->setNoiseParams("mgv7_np_mountain", np_mountain);
settings->setNoiseParams("mgv7_np_ridge", np_ridge);
settings->setNoiseParams("mgv7_np_cavern", np_cavern);
settings->setNoiseParams("mgv7_np_cave1", np_cave1);
settings->setNoiseParams("mgv7_np_cave2", np_cave2);
}
@ -256,9 +273,23 @@ void MapgenV7::makeChunk(BlockMakeData *data)
biomegen->calcBiomeNoise(node_min);
MgStoneType stone_type = generateBiomes();
if (flags & MG_CAVES)
generateCaves(stone_surface_max_y, water_level);
// Generate caverns, tunnels and classic caves
if (flags & MG_CAVES) {
bool has_cavern = false;
// Generate caverns
if (spflags & MGV7_CAVERNS)
has_cavern = generateCaverns(stone_surface_max_y);
// Generate tunnels and classic caves
if (has_cavern)
// Disable classic caves in this mapchunk by setting
// 'large cave depth' to world base. Avoids excessive liquid in
// large caverns and floating blobs of overgenerated liquid.
generateCaves(stone_surface_max_y, -MAX_MAP_GENERATION_LIMIT);
else
generateCaves(stone_surface_max_y, water_level);
}
// Generate dungeons
if (flags & MG_DUNGEONS)
generateDungeons(stone_surface_max_y, stone_type);
@ -274,8 +305,10 @@ void MapgenV7::makeChunk(BlockMakeData *data)
//printf("makeChunk: %dms\n", t.stop());
// Update liquids
updateLiquid(&data->transforming_liquid, full_node_min, full_node_max);
// Calculate lighting
// Limit floatland shadow
bool propagate_shadow = !((spflags & MGV7_FLOATLANDS) &&
node_min.Y <= shadow_limit && node_max.Y >= shadow_limit);