Allow Distro Hubs to optionally distribute only to certain cities

C3X.h

@@ -208,6 +208,18 @@ enum distribution_hub_yield_division_mode {
 	DHYDM_SCALE_BY_CITY_COUNT
 };
 
+enum distribution_hub_city_selection_mode {
+	DHCSM_ALL_CITIES = 0,
+	DHCSM_SPECIFIC_CITIES
+};
+
+enum right_click_menu_item_id {
+	NAMED_TILE_MENU_ID                  = 0x90,
+	DISTRIBUTION_HUB_MENU_ALL_ID       = 0x53000000,
+	DISTRIBUTION_HUB_MENU_SPECIFIC_ID  = 0x53000001,
+	DISTRIBUTION_HUB_MENU_CITY_ID_BASE = 0x53000010
+};
+
 enum ai_distribution_hub_build_strategy {
 	ADHBS_AUTO = 0,
 	ADHBS_BY_CITY_COUNT
@@ -495,10 +507,11 @@ struct c3x_config {
 	bool completed_wonder_districts_can_be_destroyed;
 	bool destroyed_wonders_can_be_built_again;
 
-	int distribution_hub_yield_division_mode;
-	int distribution_hub_food_yield_divisor;
-	int distribution_hub_shield_yield_divisor;
-	int ai_distribution_hub_build_strategy;
+	int distribution_hub_yield_division_mode;
+	bool enable_distribution_hub_city_selection;
+	int distribution_hub_food_yield_divisor;
+	int distribution_hub_shield_yield_divisor;
+	int ai_distribution_hub_build_strategy;
 	int ai_ideal_distribution_hub_count_per_100_cities;
 	int max_distribution_hub_count_per_100_cities;
 	int central_rail_hub_distribution_food_bonus_percent;
@@ -664,12 +677,16 @@ enum c3x_label {
 	CL_DISTRICTS_IN_SAVE_FILE,
 	CL_CURRENTLY_CONFIGURED_DISTRICTS,
 
-	// Tile naming
-	CL_NAME_TILE,
-	CL_RENAME_TILE,
-
-	// "Action" for passenger units
-	CL_TRANSPORTED,
+	// Tile naming
+	CL_NAME_TILE,
+	CL_RENAME_TILE,
+
+	// Distribution hub right-click menu
+	CL_DISTRIBUTE_TO_ALL_CITIES,
+	CL_DISTRIBUTE_TO_SPECIFIC_CITIES,
+
+	// "Action" for passenger units
+	CL_TRANSPORTED,
 
 	CL_IN_STATE_27,
 	CL_IN_STATE_28,
@@ -1340,6 +1357,8 @@ struct distribution_hub_record {
 	int tile_x;
 	int tile_y;
 	int civ_id;
+	int city_selection_mode;
+	struct table selected_city_ids;
 	int food_yield;
 	int shield_yield;
 	int raw_food_yield;
@@ -1597,6 +1616,10 @@ struct injected_state {
 	bool named_tile_menu_active;
 	int named_tile_menu_tile_x;
 	int named_tile_menu_tile_y;
+	bool distribution_hub_menu_active;
+	int distribution_hub_menu_tile_x;
+	int distribution_hub_menu_tile_y;
+	bool distribution_hub_menu_reopen_requested;
 
 	// List of temporary ints. Initializes to NULL/0/0, used with functions "memoize" and "clear_memo"
 	int * memo;
@@ -2241,6 +2264,7 @@ struct district_button_image_set {
 	Sprite distribution_hub_eaten_food_icon;
 	Sprite distribution_hub_shield_icon_small;
 	Sprite distribution_hub_food_icon_small;
+	Sprite distribution_hub_menu_icon_sentinel;
 	int non_district_shield_icons_remaining;
 	int corruption_shield_icons_remaining;
 	int district_shield_icons_remaining;

Text/c3x-labels.txt

@@ -140,12 +140,16 @@ There may be other errors as well.
 Districts in save file
 Currently configured districts from
 
-; For naming tiles
-Name Tile
-Rename
-
-; This appears instead of the above actions on units that have been loaded into another (except an army).
-Transported
+; For naming tiles
+Name Tile
+Rename
+
+; Distribution hub right-click menu
+Distribute to All Cities
+Distribute to Specific Cities
+
+; This appears instead of the above actions on units that have been loaded into another (except an army).
+Transported
 
 ; Action labels for the four unknown unit states. These labels are placeholders that should never actually appear on the UI.
 In State 27

civ_prog_objects.csv

@@ -972,4 +972,4 @@ ignore,	   0x4BF660,	0x4C6C10,	0x4BF6F0,	"City_draw_citizens",				"void (__fastc
 ignore,	   0x4B9F60,	0x4C15D0,	0x4B9FF0,	"City_add_population",				"void (__fastcall *) (City * this, int edx, int num, int race_id)"
 ignore,	   0x670234,	0x68D2E0,	0x670234,	"Tile_m27_Check_Shield_Bonus",			"bool (__fastcall *) (Tile * this)"
 ignore,	   0x5f3448,	0x6032DF,	0x5F3378,	"CHECK_SHIELD_BONUS_TO_CAN_SPAWN_RES_RETURN",	"int"
-
+inlead,	   0x61B320,	0x0,	    0x0,	    "Context_Menu_draw_item",			"void (__fastcall *) (Context_Menu * this, int edx, int item_index, int redraw)"

default.c3x_config.ini

@@ -1107,22 +1107,26 @@ destroyed_wonders_can_be_built_again = true
 
 ; Distribution Hubs work as "breadbaskets" and mining areas far from urban centers, minimizing local city potential but benefiting the entire civilization.
 ; Distribution Hubs make surrounding tiles unworkable and instead distribute their raw food and shield yields to ALL connected cities in your civilization.
-; "Divisors" for food and shields multiply the sqrt-based divisor in scale-by-city-count mode, and are a straight divider in flat mode. Yields are subject
+; "Divisors" for food and shields multiply the quarter-step sqrt-based divisor in scale-by-city-count mode, and are a straight divider in flat mode. Yields are subject
 ; to corruption as with regular shields.
 ;
 ; ai_ideal_distribution_hub_count_per_100_cities controls how many hubs the AI tries to maintain per 100 cities if distribution_hub_yield_division_mode
 ; is set to "flat" (e.g., 25 means the AI aims for 1 hub per 4 cities).
 ;
-; distribution_hub_yield_division_mode controls how a hub splits its collected food/shields across connected cities:
-;   flat:                Divide raw yields by the configured divisors (distribution_hub_food_yield_divisor & distribution_hub_shield_yield_divisor)
-;   scale-by-city-count: Bonuses gradually reduce as more cities plug into the hub. Formula: floor(raw_yield / (sqrt(connected_city_count) * divisor))
-;
-; ai_distribution_hub_build_strategy controls how the AI decides to build distribution hubs:
-;   by-city-count:       AI builds hubs based on its ideal hub count per 100 cities
-;   auto:                AI dynamically assesses need based on city growth and food/shield deficits across civ
-distribution_hub_yield_division_mode = scale-by-city-count
-ai_distribution_hub_build_strategy = auto
-distribution_hub_food_yield_divisor = 2
+; distribution_hub_yield_division_mode controls how a hub splits its collected food/shields across connected cities:
+;   flat:                Divide raw yields by the configured divisors (distribution_hub_food_yield_divisor & distribution_hub_shield_yield_divisor)
+;   scale-by-city-count: Bonuses gradually reduce as more cities plug into the hub. Formula: round(raw_yield / (round_sqrt_to_nearest_quarter(connected_city_count) * divisor))
+;
+; enable_distribution_hub_city_selection lets human players and AIs choose specific connected cities for hub distribution. If false, hubs always
+; distribute to all connected cities.
+;
+; ai_distribution_hub_build_strategy controls how the AI decides to build distribution hubs:
+;   by-city-count:       AI builds hubs based on its ideal hub count per 100 cities
+;   auto:                AI dynamically assesses need based on city growth and food/shield deficits across civ
+distribution_hub_yield_division_mode = scale-by-city-count
+enable_distribution_hub_city_selection = true
+ai_distribution_hub_build_strategy = auto
+distribution_hub_food_yield_divisor = 2
 distribution_hub_shield_yield_divisor = 2
 ai_ideal_distribution_hub_count_per_100_cities = 50
 max_distribution_hub_count_per_100_cities = 50