Feature: allow setting a custom terrain type to define highest peak

At least, TGP will try to reach it. It heavily depends on the map
if it is reachable at all. But for sure it will do its atmost to
get there!

1 files changed, 40 insertions, 9 deletions

diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
index f59e0ae46..46f2eac24 100644
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -347,7 +347,7 @@ static DropDownList BuildTownNameDropDown()
 }
 
 
-static const StringID _elevations[]  = {STR_TERRAIN_TYPE_VERY_FLAT, STR_TERRAIN_TYPE_FLAT, STR_TERRAIN_TYPE_HILLY, STR_TERRAIN_TYPE_MOUNTAINOUS, STR_TERRAIN_TYPE_ALPINIST, INVALID_STRING_ID};
+static const StringID _elevations[]  = {STR_TERRAIN_TYPE_VERY_FLAT, STR_TERRAIN_TYPE_FLAT, STR_TERRAIN_TYPE_HILLY, STR_TERRAIN_TYPE_MOUNTAINOUS, STR_TERRAIN_TYPE_ALPINIST, STR_TERRAIN_TYPE_CUSTOM, INVALID_STRING_ID};
 static const StringID _sea_lakes[]   = {STR_SEA_LEVEL_VERY_LOW, STR_SEA_LEVEL_LOW, STR_SEA_LEVEL_MEDIUM, STR_SEA_LEVEL_HIGH, STR_SEA_LEVEL_CUSTOM, INVALID_STRING_ID};
 static const StringID _rivers[]      = {STR_RIVERS_NONE, STR_RIVERS_FEW, STR_RIVERS_MODERATE, STR_RIVERS_LOT, INVALID_STRING_ID};
 static const StringID _smoothness[]  = {STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN_VERY_SMOOTH, STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN_SMOOTH, STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN_ROUGH, STR_CONFIG_SETTING_ROUGHNESS_OF_TERRAIN_VERY_ROUGH, INVALID_STRING_ID};
@@ -378,8 +378,9 @@ struct GenerateLandscapeWindow : public Window {
 		this->SetWidgetDisabledState(WID_GL_TOWN_PULLDOWN,     _game_mode == GM_EDITOR);
 		this->SetWidgetDisabledState(WID_GL_INDUSTRY_PULLDOWN, _game_mode == GM_EDITOR);
 
-		/* In case the map_height_limit is changed, clamp heightmap_height. */
+		/* In case the map_height_limit is changed, clamp heightmap_height and custom_terrain_type. */
 		_settings_newgame.game_creation.heightmap_height = Clamp(_settings_newgame.game_creation.heightmap_height, MIN_HEIGHTMAP_HEIGHT, GetMapHeightLimit());
+		_settings_newgame.game_creation.custom_terrain_type = Clamp(_settings_newgame.game_creation.custom_terrain_type, MIN_CUSTOM_TERRAIN_TYPE, GetMapHeightLimit());
 
 		this->OnInvalidateData();
 	}
@@ -417,7 +418,14 @@ struct GenerateLandscapeWindow : public Window {
 
 			case WID_GL_INDUSTRY_PULLDOWN:   SetDParam(0, _game_mode == GM_EDITOR ? STR_CONFIG_SETTING_OFF : _num_inds[_settings_newgame.difficulty.industry_density]); break;
 			case WID_GL_LANDSCAPE_PULLDOWN:  SetDParam(0, _landscape[_settings_newgame.game_creation.land_generator]); break;
-			case WID_GL_TERRAIN_PULLDOWN:    SetDParam(0, _elevations[_settings_newgame.difficulty.terrain_type]); break;
+			case WID_GL_TERRAIN_PULLDOWN:
+				if (_settings_newgame.difficulty.terrain_type == CUSTOM_TERRAIN_TYPE_NUMBER_DIFFICULTY) {
+					SetDParam(0, STR_TERRAIN_TYPE_CUSTOM_VALUE);
+					SetDParam(1, _settings_newgame.game_creation.custom_terrain_type);
+				} else {
+					SetDParam(0, _elevations[_settings_newgame.difficulty.terrain_type]); break;
+				}
+				break;
 
 			case WID_GL_WATER_PULLDOWN:
 				if (_settings_newgame.difficulty.quantity_sea_lakes == CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY) {
@@ -511,10 +519,14 @@ struct GenerateLandscapeWindow : public Window {
 		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 &&
-				_settings_newgame.difficulty.quantity_sea_lakes == CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY) {
-			_settings_newgame.difficulty.quantity_sea_lakes = CUSTOM_SEA_LEVEL_MIN_PERCENTAGE;
+		/* Do not allow a custom sea level or terrain type with the original land generator. */
+		if (_settings_newgame.game_creation.land_generator == LG_ORIGINAL) {
+			if (_settings_newgame.difficulty.quantity_sea_lakes == CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY) {
+				_settings_newgame.difficulty.quantity_sea_lakes = 1;
+			}
+			if (_settings_newgame.difficulty.terrain_type == CUSTOM_TERRAIN_TYPE_NUMBER_DIFFICULTY) {
+				_settings_newgame.difficulty.terrain_type = 1;
+			}
 		}
 
 	}
@@ -563,7 +575,13 @@ struct GenerateLandscapeWindow : public Window {
 
 			case WID_GL_INDUSTRY_PULLDOWN:   strs = _num_inds; break;
 			case WID_GL_LANDSCAPE_PULLDOWN:  strs = _landscape; break;
-			case WID_GL_TERRAIN_PULLDOWN:    strs = _elevations; break;
+
+			case WID_GL_TERRAIN_PULLDOWN:
+				strs = _elevations;
+				SetDParamMaxValue(0, MAX_MAP_HEIGHT_LIMIT);
+				*size = maxdim(*size, GetStringBoundingBox(STR_TERRAIN_TYPE_CUSTOM_VALUE));
+				break;
+
 			case WID_GL_WATER_PULLDOWN:
 				strs = _sea_lakes;
 				SetDParamMaxValue(0, CUSTOM_SEA_LEVEL_MAX_PERCENTAGE);
@@ -854,7 +872,15 @@ struct GenerateLandscapeWindow : public Window {
 				break;
 
 			case WID_GL_INDUSTRY_PULLDOWN: _settings_newgame.difficulty.industry_density = index; break;
-			case WID_GL_TERRAIN_PULLDOWN:  _settings_newgame.difficulty.terrain_type     = index; break;
+			case WID_GL_TERRAIN_PULLDOWN: {
+				if ((uint)index == CUSTOM_TERRAIN_TYPE_NUMBER_DIFFICULTY) {
+					this->widget_id = widget;
+					SetDParam(0, _settings_newgame.game_creation.custom_terrain_type);
+					ShowQueryString(STR_JUST_INT, STR_MAPGEN_TERRAIN_TYPE_QUERY_CAPT, 4, this, CS_NUMERAL, QSF_NONE);
+				}
+				_settings_newgame.difficulty.terrain_type = index;
+				break;
+			}
 
 			case WID_GL_WATER_PULLDOWN: {
 				if ((uint)index == CUSTOM_SEA_LEVEL_NUMBER_DIFFICULTY) {
@@ -885,6 +911,7 @@ struct GenerateLandscapeWindow : public Window {
 				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_TERRAIN_PULLDOWN: value = MIN_MAP_HEIGHT_LIMIT; break;
 				case WID_GL_WATER_PULLDOWN: value = CUSTOM_SEA_LEVEL_MIN_PERCENTAGE; break;
 				default: NOT_REACHED();
 			}
@@ -915,6 +942,10 @@ struct GenerateLandscapeWindow : public Window {
 				_settings_newgame.game_creation.custom_town_number = Clamp(value, 1, CUSTOM_TOWN_MAX_NUMBER);
 				break;
 
+			case WID_GL_TERRAIN_PULLDOWN:
+				_settings_newgame.game_creation.custom_terrain_type = Clamp(value, MIN_CUSTOM_TERRAIN_TYPE, GetMapHeightLimit());
+				break;
+
 			case WID_GL_WATER_PULLDOWN:
 				_settings_newgame.game_creation.custom_sea_level = Clamp(value, CUSTOM_SEA_LEVEL_MIN_PERCENTAGE, CUSTOM_SEA_LEVEL_MAX_PERCENTAGE);
 				break;