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@@ -18,6 +18,7 @@
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#include "command_func.h"
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#include "industry.h"
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#include "station_base.h"
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#include "station_kdtree.h"
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#include "company_base.h"
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#include "news_func.h"
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#include "error.h"
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@@ -3197,6 +3198,21 @@ CommandCost CmdDoTownAction(TileIndex ti
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return cost;
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}
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template <typename Func>
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static void ForAllStationsNearTown(Town *t, Func func)
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{
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/* Ideally the search radius should be close to the actual town zone 0 radius.
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* The true radius is not stored or calculated anywhere, only the squared radius. */
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/* The efficiency of this search might be improved for large towns and many stations on the map,
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* by using an integer square root approximation giving a value not less than the true square root. */
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uint search_radius = t->cache.squared_town_zone_radius[0] / 2;
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ForAllStationsRadius(t->xy, search_radius, [&](const Station * st) {
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if (DistanceSquare(st->xy, t->xy) <= t->cache.squared_town_zone_radius[0]) {
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func(st);
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}
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});
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}
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static void UpdateTownRating(Town *t)
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{
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/* Increase company ratings if they're low */
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@@ -3207,22 +3223,19 @@ static void UpdateTownRating(Town *t)
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}
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}
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const Station *st;
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FOR_ALL_STATIONS(st) {
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if (DistanceSquare(st->xy, t->xy) <= t->cache.squared_town_zone_radius[0]) {
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if (st->time_since_load <= 20 || st->time_since_unload <= 20) {
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if (Company::IsValidID(st->owner)) {
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int new_rating = t->ratings[st->owner] + RATING_STATION_UP_STEP;
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t->ratings[st->owner] = min(new_rating, INT16_MAX); // do not let it overflow
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}
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} else {
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if (Company::IsValidID(st->owner)) {
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int new_rating = t->ratings[st->owner] + RATING_STATION_DOWN_STEP;
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t->ratings[st->owner] = max(new_rating, INT16_MIN);
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}
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ForAllStationsNearTown(t, [&](const Station *st) {
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if (st->time_since_load <= 20 || st->time_since_unload <= 20) {
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if (Company::IsValidID(st->owner)) {
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int new_rating = t->ratings[st->owner] + RATING_STATION_UP_STEP;
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t->ratings[st->owner] = min(new_rating, INT16_MAX); // do not let it overflow
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}
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} else {
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if (Company::IsValidID(st->owner)) {
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int new_rating = t->ratings[st->owner] + RATING_STATION_DOWN_STEP;
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t->ratings[st->owner] = max(new_rating, INT16_MIN);
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}
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}
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}
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});
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/* clamp all ratings to valid values */
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for (uint i = 0; i < MAX_COMPANIES; i++) {
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@@ -3257,14 +3270,11 @@ static void UpdateTownGrowCounter(Town *
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static int CountActiveStations(Town *t)
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{
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int n = 0;
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const Station *st;
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FOR_ALL_STATIONS(st) {
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if (DistanceSquare(st->xy, t->xy) <= t->cache.squared_town_zone_radius[0]) {
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if (st->time_since_load <= 20 || st->time_since_unload <= 20) {
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n++;
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}
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ForAllStationsNearTown(t, [&](const Station * st) {
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if (st->time_since_load <= 20 || st->time_since_unload <= 20) {
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n++;
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}
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}
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});
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return n;
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}
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