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Feature: setting to indicate desert coverage for tropic climate

Browse Source 
This is an indication value; the game tries to get as close as it
can, but due to the complex tropic rules, that is unlikely to be
exact.

In the end, it picks a height-level to base the desert/tropic
line on. This is strictly seen not needed, as we can convert any
tile to either. But it is the simplest way to get started with
this without redoing all related functions.
pull/239/head
Patric Stout 3 years ago committed by Patric Stout
parent cafe4eed6e
commit 70bc55cfd6
9 changed files with 194 additions and 33 deletions
Show Stats Download Patch File Download Diff File

90
src/genworld_gui.cpp
Unescape Escape View File

@ -111,7 +111,10 @@ static const NWidgetPart _nested_generate_landscape_widgets[] = {
NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
NWidget(NWID_VERTICAL, NC_EQUALSIZE), SetPIP(0, 4, 0),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_MAX_HEIGHTLEVEL, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_SNOW_COVERAGE, STR_NULL), SetFill(1, 1),
NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GL_CLIMATE_SEL_LABEL),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_SNOW_COVERAGE, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_DESERT_COVERAGE, STR_NULL), SetFill(1, 1),
EndContainer(),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_DATE, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_SMOOTHNESS, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_QUANTITY_OF_RIVERS, STR_NULL), SetFill(1, 1),
@ -124,11 +127,19 @@ static const NWidgetPart _nested_generate_landscape_widgets[] = {
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_MAX_HEIGHTLEVEL_TEXT), SetDataTip(STR_BLACK_INT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_MAX_HEIGHTLEVEL_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_MAX_HEIGHTLEVEL_UP), SetFill(0, 1),
EndContainer(),
/* Snow line. */
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_MAPGEN_SNOW_COVERAGE_DOWN), SetFill(0, 1),
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_TEXT), SetDataTip(STR_MAPGEN_SNOW_COVERAGE_TEXT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_SNOW_COVERAGE_UP), SetFill(0, 1),
NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GL_CLIMATE_SEL_SELECTOR),
/* Snow coverage. */
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_MAPGEN_SNOW_COVERAGE_DOWN), SetFill(0, 1),
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_TEXT), SetDataTip(STR_MAPGEN_SNOW_COVERAGE_TEXT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_SNOW_COVERAGE_UP), SetFill(0, 1),
EndContainer(),
/* Desert coverage. */
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_DESERT_COVERAGE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_MAPGEN_DESERT_COVERAGE_DOWN), SetFill(0, 1),
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_DESERT_COVERAGE_TEXT), SetDataTip(STR_MAPGEN_DESERT_COVERAGE_TEXT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_DESERT_COVERAGE_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_DESERT_COVERAGE_UP), SetFill(0, 1),
EndContainer(),
EndContainer(),
/* Starting date. */
NWidget(NWID_HORIZONTAL),
@ -228,7 +239,10 @@ static const NWidgetPart _nested_heightmap_load_widgets[] = {
NWidget(NWID_HORIZONTAL), SetPIP(0, 3, 0),
NWidget(NWID_VERTICAL, NC_EQUALSIZE), SetPIP(0, 4, 0),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_MAX_HEIGHTLEVEL, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_SNOW_COVERAGE, STR_NULL), SetFill(1, 1),
NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GL_CLIMATE_SEL_LABEL),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_SNOW_COVERAGE, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_DESERT_COVERAGE, STR_NULL), SetFill(1, 1),
EndContainer(),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_MAPGEN_DATE, STR_NULL), SetFill(1, 1),
NWidget(WWT_TEXT, COLOUR_ORANGE), SetDataTip(STR_GAME_OPTIONS_TOWN_NAMES_FRAME, STR_NULL), SetFill(1, 1),
EndContainer(),
@ -238,10 +252,17 @@ static const NWidgetPart _nested_heightmap_load_widgets[] = {
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_MAX_HEIGHTLEVEL_TEXT), SetDataTip(STR_BLACK_INT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_MAX_HEIGHTLEVEL_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_MAX_HEIGHTLEVEL_UP), SetFill(0, 1),
EndContainer(),
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_MAPGEN_SNOW_COVERAGE_DOWN), SetFill(0, 1),
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_TEXT), SetDataTip(STR_BLACK_INT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_SNOW_COVERAGE_UP), SetFill(0, 1),
NWidget(NWID_SELECTION, INVALID_COLOUR, WID_GL_CLIMATE_SEL_SELECTOR),
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_MAPGEN_SNOW_COVERAGE_DOWN), SetFill(0, 1),
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_TEXT), SetDataTip(STR_MAPGEN_SNOW_COVERAGE_TEXT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_SNOW_COVERAGE_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_SNOW_COVERAGE_UP), SetFill(0, 1),
EndContainer(),
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_DESERT_COVERAGE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_MAPGEN_DESERT_COVERAGE_DOWN), SetFill(0, 1),
NWidget(WWT_TEXTBTN, COLOUR_ORANGE, WID_GL_DESERT_COVERAGE_TEXT), SetDataTip(STR_MAPGEN_DESERT_COVERAGE_TEXT, STR_NULL), SetFill(1, 0),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_DESERT_COVERAGE_UP), SetDataTip(SPR_ARROW_UP, STR_MAPGEN_DESERT_COVERAGE_UP), SetFill(0, 1),
EndContainer(),
EndContainer(),
NWidget(NWID_HORIZONTAL),
NWidget(WWT_IMGBTN, COLOUR_ORANGE, WID_GL_START_DATE_DOWN), SetDataTip(SPR_ARROW_DOWN, STR_SCENEDIT_TOOLBAR_TOOLTIP_MOVE_THE_STARTING_DATE_BACKWARD), SetFill(0, 1),
@ -367,6 +388,7 @@ struct GenerateLandscapeWindow : public Window {
case WID_GL_MAPSIZE_Y_PULLDOWN: SetDParam(0, 1LL << _settings_newgame.game_creation.map_y); break;
case WID_GL_MAX_HEIGHTLEVEL_TEXT: SetDParam(0, _settings_newgame.construction.max_heightlevel); break;
case WID_GL_SNOW_COVERAGE_TEXT: SetDParam(0, _settings_newgame.game_creation.snow_coverage); break;
case WID_GL_DESERT_COVERAGE_TEXT: SetDParam(0, _settings_newgame.game_creation.desert_coverage); break;
case WID_GL_TOWN_PULLDOWN:
if (_game_mode == GM_EDITOR) {
@ -458,6 +480,19 @@ struct GenerateLandscapeWindow : public Window {
/* Disable snowline if not arctic */
this->SetWidgetDisabledState(WID_GL_SNOW_COVERAGE_TEXT, _settings_newgame.game_creation.landscape != LT_ARCTIC);
/* Disable desert if not tropic */
this->SetWidgetDisabledState(WID_GL_DESERT_COVERAGE_TEXT, _settings_newgame.game_creation.landscape != LT_TROPIC);
/* Set snow/rainforest selections */
int climate_plane = 0;
switch (_settings_newgame.game_creation.landscape) {
case LT_TEMPERATE: climate_plane = SZSP_VERTICAL; break;
case LT_ARCTIC: climate_plane = 0; break;
case LT_TROPIC: climate_plane = 1; break;
case LT_TOYLAND: climate_plane = SZSP_VERTICAL; break;
}
this->GetWidget<NWidgetStacked>(WID_GL_CLIMATE_SEL_LABEL)->SetDisplayedPlane(climate_plane);
this->GetWidget<NWidgetStacked>(WID_GL_CLIMATE_SEL_SELECTOR)->SetDisplayedPlane(climate_plane);
/* Update availability of decreasing / increasing start date and snow level */
this->SetWidgetDisabledState(WID_GL_MAX_HEIGHTLEVEL_DOWN, _settings_newgame.construction.max_heightlevel <= MIN_MAX_HEIGHTLEVEL);
@ -466,6 +501,8 @@ struct GenerateLandscapeWindow : public Window {
this->SetWidgetDisabledState(WID_GL_START_DATE_UP, _settings_newgame.game_creation.starting_year >= MAX_YEAR);
this->SetWidgetDisabledState(WID_GL_SNOW_COVERAGE_DOWN, _settings_newgame.game_creation.snow_coverage <= 0 || _settings_newgame.game_creation.landscape != LT_ARCTIC);
this->SetWidgetDisabledState(WID_GL_SNOW_COVERAGE_UP, _settings_newgame.game_creation.snow_coverage >= 100 || _settings_newgame.game_creation.landscape != LT_ARCTIC);
this->SetWidgetDisabledState(WID_GL_DESERT_COVERAGE_DOWN, _settings_newgame.game_creation.desert_coverage <= 0 || _settings_newgame.game_creation.landscape != LT_TROPIC);
this->SetWidgetDisabledState(WID_GL_DESERT_COVERAGE_UP, _settings_newgame.game_creation.desert_coverage >= 100 || _settings_newgame.game_creation.landscape != LT_TROPIC);
/* Do not allow a custom sea level with the original land generator. */
if (_settings_newgame.game_creation.land_generator == LG_ORIGINAL &&
@ -500,6 +537,11 @@ struct GenerateLandscapeWindow : public Window {
*size = maxdim(*size, GetStringBoundingBox(STR_MAPGEN_SNOW_COVERAGE_TEXT));
break;
case WID_GL_DESERT_COVERAGE_TEXT:
SetDParamMaxValue(0, MAX_TILE_HEIGHT);
*size = maxdim(*size, GetStringBoundingBox(STR_MAPGEN_DESERT_COVERAGE_TEXT));
break;
case WID_GL_HEIGHTMAP_SIZE_TEXT:
SetDParam(0, this->x);
SetDParam(1, this->y);
@ -674,6 +716,24 @@ struct GenerateLandscapeWindow : public Window {
ShowQueryString(STR_JUST_INT, STR_MAPGEN_SNOW_COVERAGE_QUERY_CAPT, 4, this, CS_NUMERAL, QSF_ENABLE_DEFAULT);
break;
case WID_GL_DESERT_COVERAGE_DOWN:
case WID_GL_DESERT_COVERAGE_UP: // Desert coverage buttons
/* Don't allow too fast scrolling */
if (!(this->flags & WF_TIMEOUT) || this->timeout_timer <= 1) {
this->HandleButtonClick(widget);
_settings_newgame.game_creation.desert_coverage = Clamp(_settings_newgame.game_creation.desert_coverage + (widget - WID_GL_DESERT_COVERAGE_TEXT) * 10, 0, 100);
this->InvalidateData();
}
_left_button_clicked = false;
break;
case WID_GL_DESERT_COVERAGE_TEXT: // Desert line text
this->widget_id = WID_GL_DESERT_COVERAGE_TEXT;
SetDParam(0, _settings_newgame.game_creation.desert_coverage);
ShowQueryString(STR_JUST_INT, STR_MAPGEN_DESERT_COVERAGE_QUERY_CAPT, 4, this, CS_NUMERAL, QSF_ENABLE_DEFAULT);
break;
case WID_GL_LANDSCAPE_PULLDOWN: // Landscape generator
ShowDropDownMenu(this, _landscape, _settings_newgame.game_creation.land_generator, WID_GL_LANDSCAPE_PULLDOWN, 0, 0);
break;
@ -739,7 +799,7 @@ struct GenerateLandscapeWindow : public Window {
void OnTimeout() override
{
static const int raise_widgets[] = {WID_GL_MAX_HEIGHTLEVEL_DOWN, WID_GL_MAX_HEIGHTLEVEL_UP, WID_GL_START_DATE_DOWN, WID_GL_START_DATE_UP, WID_GL_SNOW_COVERAGE_UP, WID_GL_SNOW_COVERAGE_DOWN, WIDGET_LIST_END};
static const int raise_widgets[] = {WID_GL_MAX_HEIGHTLEVEL_DOWN, WID_GL_MAX_HEIGHTLEVEL_UP, WID_GL_START_DATE_DOWN, WID_GL_START_DATE_UP, WID_GL_SNOW_COVERAGE_UP, WID_GL_SNOW_COVERAGE_DOWN, WID_GL_DESERT_COVERAGE_UP, WID_GL_DESERT_COVERAGE_DOWN, WIDGET_LIST_END};
for (const int *widget = raise_widgets; *widget != WIDGET_LIST_END; widget++) {
if (this->IsWidgetLowered(*widget)) {
this->RaiseWidget(*widget);
@ -812,6 +872,7 @@ struct GenerateLandscapeWindow : public Window {
case WID_GL_MAX_HEIGHTLEVEL_TEXT: value = DEF_MAX_HEIGHTLEVEL; break;
case WID_GL_START_DATE_TEXT: value = DEF_START_YEAR; break;
case WID_GL_SNOW_COVERAGE_TEXT: value = DEF_SNOW_COVERAGE; break;
case WID_GL_DESERT_COVERAGE_TEXT: value = DEF_DESERT_COVERAGE; break;
case WID_GL_TOWN_PULLDOWN: value = 1; break;
case WID_GL_WATER_PULLDOWN: value = CUSTOM_SEA_LEVEL_MIN_PERCENTAGE; break;
default: NOT_REACHED();
@ -834,6 +895,11 @@ struct GenerateLandscapeWindow : public Window {
_settings_newgame.game_creation.snow_coverage = Clamp(value, 0, 100);
break;
case WID_GL_DESERT_COVERAGE_TEXT:
this->SetWidgetDirty(WID_GL_DESERT_COVERAGE_TEXT);
_settings_newgame.game_creation.desert_coverage = Clamp(value, 0, 100);
break;
case WID_GL_TOWN_PULLDOWN:
_settings_newgame.game_creation.custom_town_number = Clamp(value, 1, CUSTOM_TOWN_MAX_NUMBER);
break;

93
src/landscape.cpp
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@ -968,11 +968,10 @@ static void GenerateTerrain(int type, uint flag)
#include "table/genland.h"
static void CreateDesertOrRainForest()
static void CreateDesertOrRainForest(uint desert_tropic_line)
{
TileIndex update_freq = MapSize() / 4;
const TileIndexDiffC *data;
uint max_desert_height = CeilDiv(_settings_game.construction.max_heightlevel, 4);
for (TileIndex tile = 0; tile != MapSize(); ++tile) {
if ((tile % update_freq) == 0) IncreaseGeneratingWorldProgress(GWP_LANDSCAPE);
@ -982,7 +981,7 @@ static void CreateDesertOrRainForest()
for (data = _make_desert_or_rainforest_data;
data != endof(_make_desert_or_rainforest_data); ++data) {
TileIndex t = AddTileIndexDiffCWrap(tile, *data);
if (t != INVALID_TILE && (TileHeight(t) >= max_desert_height || IsTileType(t, MP_WATER))) break;
if (t != INVALID_TILE && (TileHeight(t) >= desert_tropic_line || IsTileType(t, MP_WATER))) break;
}
if (data == endof(_make_desert_or_rainforest_data)) {
SetTropicZone(tile, TROPICZONE_DESERT);
@ -1296,15 +1295,50 @@ static void CreateRivers()
}
/**
* Calculate the line from which snow begins.
* Calculate what height would be needed to cover N% of the landmass.
*
* The function allows both snow and desert/tropic line to be calculated. It
* tries to find the closests height which covers N% of the landmass; it can
* be below or above it.
*
* Tropic has a mechanism where water and tropic tiles in mountains grow
* inside the desert. To better approximate the requested coverage, this is
* taken into account via an edge histogram, which tells how many neighbouring
* tiles are lower than the tiles of that height. The multiplier indicates how
* severe this has to be taken into account.
*
* @param coverage A value between 0 and 100 indicating a percentage of landmass that should be covered.
* @param edge_multiplier How much effect neighbouring tiles that are of a lower height level have on the score.
* @return The estimated best height to use to cover N% of the landmass.
*/
static void CalculateSnowLine()
static uint CalculateCoverageLine(uint coverage, uint edge_multiplier)
{
/* Build a histogram of the map height. */
const DiagDirection neighbour_dir[] = {
DIAGDIR_NE,
DIAGDIR_SE,
DIAGDIR_SW,
DIAGDIR_NW,
};
/* Histogram of how many tiles per height level exist. */
std::array<int, MAX_TILE_HEIGHT + 1> histogram = {};
/* Histogram of how many neighbour tiles are lower than the tiles of the height level. */
std::array<int, MAX_TILE_HEIGHT + 1> edge_histogram = {};
/* Build a histogram of the map height. */
for (TileIndex tile = 0; tile < MapSize(); tile++) {
uint h = TileHeight(tile);
histogram[h]++;
if (edge_multiplier != 0) {
/* Check if any of our neighbours is below us. */
for (auto dir : neighbour_dir) {
TileIndex neighbour_tile = AddTileIndexDiffCWrap(tile, TileIndexDiffCByDiagDir(dir));
if (IsValidTile(neighbour_tile) && TileHeight(neighbour_tile) < h) {
edge_histogram[h]++;
}
}
}
}
/* The amount of land we have is the map size minus the first (sea) layer. */
@ -1312,7 +1346,7 @@ static void CalculateSnowLine()
int best_score = land_tiles;
/* Our goal is the coverage amount of the land-mass. */
int goal_tiles = land_tiles * _settings_game.game_creation.snow_coverage / 100;
int goal_tiles = land_tiles * coverage / 100;
/* We scan from top to bottom. */
uint h = MAX_TILE_HEIGHT;
@ -1323,13 +1357,50 @@ static void CalculateSnowLine()
current_tiles += histogram[h];
int current_score = goal_tiles - current_tiles;
/* Tropic grows from water and mountains into the desert. This is a
* great visual, but it also means we* need to take into account how
* much less desert tiles are being created if we are on this
* height-level. We estimate this based on how many neighbouring
* tiles are below us for a given length, assuming that is where
* tropic is growing from.
*/
if (edge_multiplier != 0 && h > 1) {
/* From water tropic tiles grow for a few tiles land inward. */
current_score -= edge_histogram[1] * edge_multiplier;
/* Tropic tiles grow into the desert for a few tiles. */
current_score -= edge_histogram[h] * edge_multiplier;
}
if (std::abs(current_score) < std::abs(best_score)) {
best_score = current_score;
best_h = h;
}
/* Always scan all height-levels, as h == 1 might give a better
* score than any before. This is true for example with 0% desert
* coverage. */
}
_settings_game.game_creation.snow_line_height = std::max(best_h, 2u);
return best_h;
}
/**
* Calculate the line from which snow begins.
*/
static void CalculateSnowLine()
{
/* We do not have snow sprites on coastal tiles, so never allow "1" as height. */
_settings_game.game_creation.snow_line_height = std::max(CalculateCoverageLine(_settings_game.game_creation.snow_coverage, 0), 2u);
}
/**
* Calculate the line (in height) between desert and tropic.
* @return The height of the line between desert and tropic.
*/
static uint8 CalculateDesertLine()
{
/* CalculateCoverageLine() runs from top to bottom, so we need to invert the coverage. */
return _settings_game.game_creation.snow_line_height = CalculateCoverageLine(100 - _settings_game.game_creation.desert_coverage, 4);
}
void GenerateLandscape(byte mode)
@ -1421,9 +1492,11 @@ void GenerateLandscape(byte mode)
CalculateSnowLine();
break;
case LT_TROPIC:
CreateDesertOrRainForest();
case LT_TROPIC: {
uint desert_tropic_line = CalculateDesertLine();
CreateDesertOrRainForest(desert_tropic_line);
break;
}
default:
break;

8
src/lang/english.txt
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@ -1355,6 +1355,9 @@ STR_CONFIG_SETTING_SNOWLINE_HEIGHT_HELPTEXT :Controls at wha
STR_CONFIG_SETTING_SNOW_COVERAGE :Snow coverage: {STRING2}
STR_CONFIG_SETTING_SNOW_COVERAGE_HELPTEXT :Controls the approximate amount of snow on the sub-arctic landscape. Snow also affects industry generation and town growth requirements. Only used during map generation. Land just above sea level is always without snow
STR_CONFIG_SETTING_SNOW_COVERAGE_VALUE :{NUM}%
STR_CONFIG_SETTING_DESERT_COVERAGE :Desert coverage: {STRING2}
STR_CONFIG_SETTING_DESERT_COVERAGE_HELPTEXT :Control the approximate amount of desert on the tropical landscape. Desert also affects industry generation. Only used during map generation
STR_CONFIG_SETTING_DESERT_COVERAGE_VALUE :{NUM}%
STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN :Roughness of terrain: {STRING2}
STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN_HELPTEXT :(TerraGenesis only) Choose the frequency of hills: Smooth landscapes have fewer, more wide-spread hills. Rough landscapes have many hills, which may look repetitive
STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN_VERY_SMOOTH :Very Smooth
@ -2902,6 +2905,10 @@ STR_MAPGEN_SNOW_COVERAGE :{BLACK}Snow cov
STR_MAPGEN_SNOW_COVERAGE_UP :{BLACK}Increase snow coverage by ten percent
STR_MAPGEN_SNOW_COVERAGE_DOWN :{BLACK}Decrease snow coverage by ten percent
STR_MAPGEN_SNOW_COVERAGE_TEXT :{BLACK}{NUM}%
STR_MAPGEN_DESERT_COVERAGE :{BLACK}Desert coverage:
STR_MAPGEN_DESERT_COVERAGE_UP :{BLACK}Increase desert coverage by ten percent
STR_MAPGEN_DESERT_COVERAGE_DOWN :{BLACK}Decrease desert coverage by ten percent
STR_MAPGEN_DESERT_COVERAGE_TEXT :{BLACK}{NUM}%
STR_MAPGEN_LAND_GENERATOR :{BLACK}Land generator:
STR_MAPGEN_TERRAIN_TYPE :{BLACK}Terrain type:
STR_MAPGEN_QUANTITY_OF_SEA_LAKES :{BLACK}Sea level:
@ -2929,6 +2936,7 @@ STR_MAPGEN_HEIGHTMAP_SIZE :{ORANGE}{NUM} x
STR_MAPGEN_MAX_HEIGHTLEVEL_QUERY_CAPT :{WHITE}Change maximum map height
STR_MAPGEN_SNOW_COVERAGE_QUERY_CAPT :{WHITE}Snow coverage (in %)
STR_MAPGEN_DESERT_COVERAGE_QUERY_CAPT :{WHITE}Desert coverage (in %)
STR_MAPGEN_START_DATE_QUERY_CAPT :{WHITE}Change starting year
# SE Map generation

1
src/settings_gui.cpp
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@ -1691,6 +1691,7 @@ static SettingsContainer &GetSettingsTree()
genworld->Add(new SettingEntry("game_creation.variety"));
genworld->Add(new SettingEntry("game_creation.snow_coverage"));
genworld->Add(new SettingEntry("game_creation.snow_line_height"));
genworld->Add(new SettingEntry("game_creation.desert_coverage"));
genworld->Add(new SettingEntry("game_creation.amount_of_rivers"));
genworld->Add(new SettingEntry("game_creation.tree_placer"));
genworld->Add(new SettingEntry("vehicle.road_side"));

1
src/settings_type.h
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@ -298,6 +298,7 @@ struct GameCreationSettings {
byte oil_refinery_limit; ///< distance oil refineries allowed from map edge
byte snow_line_height; ///< the configured snow line height (deduced from "snow_coverage")
byte snow_coverage; ///< the amount of snow coverage on the map
byte desert_coverage; ///< the amount of desert coverage on the map
byte tgen_smoothness; ///< how rough is the terrain from 0-3
byte tree_placer; ///< the tree placer algorithm
byte heightmap_rotation; ///< rotation director for the heightmap

15
src/table/settings.ini
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@ -1433,6 +1433,21 @@ strhelp = STR_CONFIG_SETTING_SNOW_COVERAGE_HELPTEXT
strval = STR_CONFIG_SETTING_SNOW_COVERAGE_VALUE
cat = SC_BASIC
[SDT_VAR]
base = GameSettings
var = game_creation.desert_coverage
type = SLE_UINT8
flags = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
guiflags = SGF_NEWGAME_ONLY
def = DEF_DESERT_COVERAGE
min = 0
max = 100
interval = 10
str = STR_CONFIG_SETTING_DESERT_COVERAGE
strhelp = STR_CONFIG_SETTING_DESERT_COVERAGE_HELPTEXT
strval = STR_CONFIG_SETTING_DESERT_COVERAGE_VALUE
cat = SC_BASIC
[SDT_NULL]
length = 4
to = SLV_144

11
src/tgp.cpp
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@ -236,17 +236,6 @@ static height_t TGPGetMaxHeight()
int map_size_bucket = std::min(MapLogX(), MapLogY()) - MIN_MAP_SIZE_BITS;
int max_height_from_table = max_height[_settings_game.difficulty.terrain_type][map_size_bucket];
/* Tropic needs tropical forest to have all industries, so make sure we allow TGP to generate this high.
* Tropic forest always starts at 1/4th of the max height. */
if (_settings_game.game_creation.landscape == LT_TROPIC) {
max_height_from_table += CeilDiv(_settings_game.construction.max_heightlevel, 4);
/* Make flat a bit more flat by removing "very flat" from it, to somewhat compensate for the increase we just did. */
if (_settings_game.difficulty.terrain_type > 0) {
max_height_from_table -= max_height[_settings_game.difficulty.terrain_type - 1][map_size_bucket];
}
}
return I2H(std::min<uint>(max_height_from_table, _settings_game.construction.max_heightlevel));
}

1
src/tile_type.h
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@ -30,6 +30,7 @@ static const uint DEF_SNOWLINE_HEIGHT = 10; ///< Default snow
static const uint MAX_SNOWLINE_HEIGHT = (MAX_TILE_HEIGHT - 2); ///< Maximum allowed snowline height
static const uint DEF_SNOW_COVERAGE = 40; ///< Default snow coverage.
static const uint DEF_DESERT_COVERAGE = 50; ///< Default desert coverage.
/**

7
src/widgets/genworld_widget.h
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@ -38,6 +38,10 @@ enum GenerateLandscapeWidgets {
WID_GL_SNOW_COVERAGE_TEXT, ///< Snow coverage.
WID_GL_SNOW_COVERAGE_UP, ///< Increase snow coverage.
WID_GL_DESERT_COVERAGE_DOWN, ///< Decrease desert coverage.
WID_GL_DESERT_COVERAGE_TEXT, ///< Desert coverage.
WID_GL_DESERT_COVERAGE_UP, ///< Increase desert coverage.
WID_GL_LANDSCAPE_PULLDOWN, ///< Dropdown 'Land generator'.
WID_GL_HEIGHTMAP_NAME_TEXT, ///< Heightmap name.
@ -55,6 +59,9 @@ enum GenerateLandscapeWidgets {
WID_GL_WATER_NE, ///< NE 'Water'/'Freeform'.
WID_GL_WATER_SE, ///< SE 'Water'/'Freeform'.
WID_GL_WATER_SW, ///< SW 'Water'/'Freeform'.
WID_GL_CLIMATE_SEL_LABEL, ///< NWID_SELECTION for snow or desert coverage label
WID_GL_CLIMATE_SEL_SELECTOR, ///< NWID_SELECTION for snow or desert coverage selector
};
/** Widgets of the #CreateScenarioWindow class. */

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