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Remove Mapgen V7 floatlands in preparation for new implementation (#9238)

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Preserve the floatland flag of existing worlds, to be used again
when the new implementation is added.
This commit is contained in:
Paramat 2020-01-04 01:23:57 +00:00 committed by GitHub
parent 44458896d9
commit c162340973
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 63 additions and 209 deletions
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23
builtin/settingtypes.txt
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@ -1623,22 +1623,6 @@ mgv7_large_cave_num_max (Large cave maximum number) int 2 0 64
# Proportion of large caves that contain liquid.
mgv7_large_cave_flooded (Large cave proportion flooded) float 0.5 0.0 1.0
# Controls the density of mountain-type floatlands.
# Is a noise offset added to the 'mgv7_np_mountain' noise value.
mgv7_float_mount_density (Floatland mountain density) float 0.6
# Typical maximum height, above and below midpoint, of floatland mountains.
mgv7_float_mount_height (Floatland mountain height) float 128.0
# Alters how mountain-type floatlands taper above and below midpoint.
mgv7_float_mount_exponent (Floatland mountain exponent) float 0.75
# Y-level of floatland midpoint and lake surface.
mgv7_floatland_level (Floatland level) int 1280
# Y-level to which floatland shadows extend.
mgv7_shadow_limit (Shadow limit) int 1024
# Y-level of cavern upper limit.
mgv7_cavern_limit (Cavern limit) int -256
@ -1678,13 +1662,6 @@ mgv7_np_mount_height (Mountain height noise) noise_params_2d 256, 112, (1000, 10
# Defines large-scale river channel structure.
mgv7_np_ridge_uwater (Ridge underwater noise) noise_params_2d 0, 1, (1000, 1000, 1000), 85039, 5, 0.6, 2.0, eased
# Defines areas of floatland smooth terrain.
# Smooth floatlands occur when noise > 0.
mgv7_np_floatland_base (Floatland base noise) noise_params_2d -0.6, 1.5, (600, 600, 600), 114, 5, 0.6, 2.0, eased
# Variation of hill height and lake depth on floatland smooth terrain.
mgv7_np_float_base_height (Floatland base height noise) noise_params_2d 48, 24, (300, 300, 300), 907, 4, 0.7, 2.0, eased
# 3D noise defining mountain structure and height.
# Also defines structure of floatland mountain terrain.
mgv7_np_mountain (Mountain noise) noise_params_3d -0.6, 1, (250, 350, 250), 5333, 5, 0.63, 2.0

143
src/mapgen/mapgen_v7.cpp
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@ -1,7 +1,7 @@
/*
Minetest
Copyright (C) 2013-2018 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2014-2018 paramat
Copyright (C) 2013-2019 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
Copyright (C) 2014-2019 paramat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
@ -57,10 +57,6 @@ MapgenV7::MapgenV7(MapgenV7Params *params, EmergeManager *emerge)
{
spflags = params->spflags;
mount_zero_level = params->mount_zero_level;
float_mount_density = params->float_mount_density;
float_mount_exponent = params->float_mount_exponent;
floatland_level = params->floatland_level;
shadow_limit = params->shadow_limit;
cave_width = params->cave_width;
large_cave_depth = params->large_cave_depth;
@ -75,11 +71,6 @@ MapgenV7::MapgenV7(MapgenV7Params *params, EmergeManager *emerge)
dungeon_ymin = params->dungeon_ymin;
dungeon_ymax = params->dungeon_ymax;
// This is to avoid a divide-by-zero.
// Parameter will be saved to map_meta.txt in limited form.
params->float_mount_height = std::fmax(params->float_mount_height, 1.0f);
float_mount_height = params->float_mount_height;
// 2D noise
noise_terrain_base =
new Noise(&params->np_terrain_base, seed, csize.X, csize.Z);
@ -92,18 +83,17 @@ MapgenV7::MapgenV7(MapgenV7Params *params, EmergeManager *emerge)
noise_filler_depth =
new Noise(&params->np_filler_depth, seed, csize.X, csize.Z);
if (spflags & MGV7_MOUNTAINS)
if (spflags & MGV7_MOUNTAINS) {
// 2D noise
noise_mount_height =
new Noise(&params->np_mount_height, seed, csize.X, csize.Z);
if (spflags & MGV7_FLOATLANDS) {
noise_floatland_base =
new Noise(&params->np_floatland_base, seed, csize.X, csize.Z);
noise_float_base_height =
new Noise(&params->np_float_base_height, seed, csize.X, csize.Z);
// 3D noise, 1 up, 1 down overgeneration
noise_mountain =
new Noise(&params->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
}
if (spflags & MGV7_RIDGES) {
// 2D noise
noise_ridge_uwater =
new Noise(&params->np_ridge_uwater, seed, csize.X, csize.Z);
// 3D noise, 1 up, 1 down overgeneration
@ -111,15 +101,11 @@ MapgenV7::MapgenV7(MapgenV7Params *params, EmergeManager *emerge)
new Noise(&params->np_ridge, seed, csize.X, csize.Y + 2, csize.Z);
}
// 3D noise, 1 up, 1 down overgeneration
if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS))
noise_mountain =
new Noise(&params->np_mountain, seed, csize.X, csize.Y + 2, csize.Z);
// 3D noise, 1 down overgeneration
MapgenBasic::np_cave1 = params->np_cave1;
MapgenBasic::np_cave2 = params->np_cave2;
MapgenBasic::np_cavern = params->np_cavern;
// 3D noise
MapgenBasic::np_dungeons = params->np_dungeons;
}
@ -132,21 +118,15 @@ MapgenV7::~MapgenV7()
delete noise_height_select;
delete noise_filler_depth;
if (spflags & MGV7_MOUNTAINS)
if (spflags & MGV7_MOUNTAINS) {
delete noise_mount_height;
if (spflags & MGV7_FLOATLANDS) {
delete noise_floatland_base;
delete noise_float_base_height;
delete noise_mountain;
}
if (spflags & MGV7_RIDGES) {
delete noise_ridge_uwater;
delete noise_ridge;
}
if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS))
delete noise_mountain;
}
@ -158,8 +138,6 @@ MapgenV7Params::MapgenV7Params():
np_filler_depth (0.0, 1.2, v3f(150, 150, 150), 261, 3, 0.7, 2.0),
np_mount_height (256.0, 112.0, v3f(1000, 1000, 1000), 72449, 3, 0.6, 2.0),
np_ridge_uwater (0.0, 1.0, v3f(1000, 1000, 1000), 85039, 5, 0.6, 2.0),
np_floatland_base (-0.6, 1.5, v3f(600, 600, 600), 114, 5, 0.6, 2.0),
np_float_base_height (48.0, 24.0, v3f(300, 300, 300), 907, 4, 0.7, 2.0),
np_mountain (-0.6, 1.0, v3f(250, 350, 250), 5333, 5, 0.63, 2.0),
np_ridge (0.0, 1.0, v3f(100, 100, 100), 6467, 4, 0.75, 2.0),
np_cavern (0.0, 1.0, v3f(384, 128, 384), 723, 5, 0.63, 2.0),
@ -181,11 +159,6 @@ void MapgenV7Params::readParams(const Settings *settings)
settings->getU16NoEx("mgv7_large_cave_num_min", large_cave_num_min);
settings->getU16NoEx("mgv7_large_cave_num_max", large_cave_num_max);
settings->getFloatNoEx("mgv7_large_cave_flooded", large_cave_flooded);
settings->getFloatNoEx("mgv7_float_mount_density", float_mount_density);
settings->getFloatNoEx("mgv7_float_mount_height", float_mount_height);
settings->getFloatNoEx("mgv7_float_mount_exponent", float_mount_exponent);
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);
@ -199,8 +172,6 @@ void MapgenV7Params::readParams(const Settings *settings)
settings->getNoiseParams("mgv7_np_filler_depth", np_filler_depth);
settings->getNoiseParams("mgv7_np_mount_height", np_mount_height);
settings->getNoiseParams("mgv7_np_ridge_uwater", np_ridge_uwater);
settings->getNoiseParams("mgv7_np_floatland_base", np_floatland_base);
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);
@ -221,11 +192,6 @@ void MapgenV7Params::writeParams(Settings *settings) const
settings->setU16("mgv7_large_cave_num_min", large_cave_num_min);
settings->setU16("mgv7_large_cave_num_max", large_cave_num_max);
settings->setFloat("mgv7_large_cave_flooded", large_cave_flooded);
settings->setFloat("mgv7_float_mount_density", float_mount_density);
settings->setFloat("mgv7_float_mount_height", float_mount_height);
settings->setFloat("mgv7_float_mount_exponent", float_mount_exponent);
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);
@ -239,8 +205,6 @@ void MapgenV7Params::writeParams(Settings *settings) const
settings->setNoiseParams("mgv7_np_filler_depth", np_filler_depth);
settings->setNoiseParams("mgv7_np_mount_height", np_mount_height);
settings->setNoiseParams("mgv7_np_ridge_uwater", np_ridge_uwater);
settings->setNoiseParams("mgv7_np_floatland_base", np_floatland_base);
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);
@ -386,10 +350,9 @@ void MapgenV7::makeChunk(BlockMakeData *data)
// 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);
// Calculate lighting
// TODO disable in and just below floatlands
bool propagate_shadow = true;
if (flags & MG_LIGHT)
calcLighting(node_min - v3s16(0, 1, 0), node_max + v3s16(0, 1, 0),
@ -458,53 +421,6 @@ bool MapgenV7::getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y)
}
bool MapgenV7::getFloatlandMountainFromMap(int idx_xyz, int idx_xz, s16 y)
{
// Make rim 2 nodes thick to match floatland base terrain
float density_gradient = (y >= floatland_level) ?
-std::pow((float)(y - floatland_level) / float_mount_height,
float_mount_exponent) :
-std::pow((float)(floatland_level - 1 - y) / float_mount_height,
float_mount_exponent);
float floatn = noise_mountain->result[idx_xyz] + float_mount_density;
return floatn + density_gradient >= 0.0f;
}
void MapgenV7::floatBaseExtentFromMap(s16 *float_base_min, s16 *float_base_max,
int idx_xz)
{
// '+1' to avoid a layer of stone at y = MAX_MAP_GENERATION_LIMIT
s16 base_min = MAX_MAP_GENERATION_LIMIT + 1;
s16 base_max = MAX_MAP_GENERATION_LIMIT;
float n_base = noise_floatland_base->result[idx_xz];
if (n_base > 0.0f) {
float n_base_height =
std::fmax(noise_float_base_height->result[idx_xz], 1.0f);
float amp = n_base * n_base_height;
float ridge = n_base_height / 3.0f;
base_min = floatland_level - amp / 1.5f;
if (amp > ridge * 2.0f) {
// Lake bed
base_max = floatland_level - (amp - ridge * 2.0f) / 2.0f;
} else {
// Hills and ridges
float diff = std::fabs(amp - ridge) / ridge;
// Smooth ridges using the 'smoothstep function'
float smooth_diff = diff * diff * (3.0f - 2.0f * diff);
base_max = floatland_level + ridge - smooth_diff * ridge;
}
}
*float_base_min = base_min;
*float_base_max = base_max;
}
int MapgenV7::generateTerrain()
{
MapNode n_air(CONTENT_AIR);
@ -519,17 +435,9 @@ int MapgenV7::generateTerrain()
noise_terrain_alt->perlinMap2D(node_min.X, node_min.Z, persistmap);
noise_height_select->perlinMap2D(node_min.X, node_min.Z);
if ((spflags & MGV7_MOUNTAINS) || (spflags & MGV7_FLOATLANDS)) {
noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
}
if (spflags & MGV7_MOUNTAINS) {
noise_mount_height->perlinMap2D(node_min.X, node_min.Z);
}
if (spflags & MGV7_FLOATLANDS) {
noise_floatland_base->perlinMap2D(node_min.X, node_min.Z);
noise_float_base_height->perlinMap2D(node_min.X, node_min.Z);
noise_mountain->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);
}
//// Place nodes
@ -543,13 +451,6 @@ int MapgenV7::generateTerrain()
if (surface_y > stone_surface_max_y)
stone_surface_max_y = surface_y;
// Get extent of floatland base terrain
// '+1' to avoid a layer of stone at y = MAX_MAP_GENERATION_LIMIT
s16 float_base_min = MAX_MAP_GENERATION_LIMIT + 1;
s16 float_base_max = MAX_MAP_GENERATION_LIMIT;
if (spflags & MGV7_FLOATLANDS)
floatBaseExtentFromMap(&float_base_min, &float_base_max, index2d);
u32 vi = vm->m_area.index(x, node_min.Y - 1, z);
u32 index3d = (z - node_min.Z) * zstride_1u1d + (x - node_min.X);
@ -567,16 +468,8 @@ int MapgenV7::generateTerrain()
vm->m_data[vi] = n_stone; // Mountain terrain
if (y > stone_surface_max_y)
stone_surface_max_y = y;
} else if ((spflags & MGV7_FLOATLANDS) &&
((y >= float_base_min && y <= float_base_max) ||
getFloatlandMountainFromMap(index3d, index2d, y))) {
vm->m_data[vi] = n_stone; // Floatland terrain
stone_surface_max_y = node_max.Y;
} else if (y <= water_level) {
vm->m_data[vi] = n_water; // Ground level water
} else if ((spflags & MGV7_FLOATLANDS) &&
(y >= float_base_max && y <= floatland_level)) {
vm->m_data[vi] = n_water; // Floatland water
vm->m_data[vi] = n_water;
} else {
vm->m_data[vi] = n_air;
}
@ -589,8 +482,8 @@ int MapgenV7::generateTerrain()
void MapgenV7::generateRidgeTerrain()
{
if (node_max.Y < water_level - 16 ||
((spflags & MGV7_FLOATLANDS) && node_max.Y > shadow_limit))
// TODO disable river canyons in floatlands
if (node_max.Y < water_level - 16)
return;
noise_ridge->perlinMap3D(node_min.X, node_min.Y - 1, node_min.Z);

16
src/mapgen/mapgen_v7.h
View File

@ -37,11 +37,6 @@ extern FlagDesc flagdesc_mapgen_v7[];
struct MapgenV7Params : public MapgenParams {
u32 spflags = MGV7_MOUNTAINS | MGV7_RIDGES | MGV7_CAVERNS;
s16 mount_zero_level = 0;
float float_mount_density = 0.6f;
float float_mount_height = 128.0f;
float float_mount_exponent = 0.75f;
s16 floatland_level = 1280;
s16 shadow_limit = 1024;
float cave_width = 0.09f;
s16 large_cave_depth = -33;
@ -63,8 +58,6 @@ struct MapgenV7Params : public MapgenParams {
NoiseParams np_filler_depth;
NoiseParams np_mount_height;
NoiseParams np_ridge_uwater;
NoiseParams np_floatland_base;
NoiseParams np_float_base_height;
NoiseParams np_mountain;
NoiseParams np_ridge;
NoiseParams np_cavern;
@ -94,19 +87,12 @@ public:
float baseTerrainLevelFromMap(int index);
bool getMountainTerrainAtPoint(s16 x, s16 y, s16 z);
bool getMountainTerrainFromMap(int idx_xyz, int idx_xz, s16 y);
bool getFloatlandMountainFromMap(int idx_xyz, int idx_xz, s16 y);
void floatBaseExtentFromMap(s16 *float_base_min, s16 *float_base_max, int idx_xz);
int generateTerrain();
void generateRidgeTerrain();
private:
s16 mount_zero_level;
float float_mount_density;
float float_mount_height;
float float_mount_exponent;
s16 floatland_level;
s16 shadow_limit;
Noise *noise_terrain_base;
Noise *noise_terrain_alt;
@ -114,8 +100,6 @@ private:
Noise *noise_height_select;
Noise *noise_mount_height;
Noise *noise_ridge_uwater;
Noise *noise_floatland_base;
Noise *noise_float_base_height;
Noise *noise_mountain;
Noise *noise_ridge;
};