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VarAction2: Move IndustryLocationDistanceCache inside IndustriesScopeResolver

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Use in all cases, not just CBID_INDUSTRY_LOCATION
This commit is contained in:
Jonathan G Rennison
2023-12-23 20:27:53 +00:00
parent 39917e8ab2
commit 48f66306e5
2 changed files with 28 additions and 44 deletions
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59
src/newgrf_industries.cpp
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@@ -88,40 +88,21 @@ uint32 GetIndustryIDAtOffset(TileIndex tile, const Industry *i, uint32 cur_grfid
return 0xFF << 8 | indtsp->grf_prop.subst_id; // so just give it the substitute
}
struct IndustryLocationDistanceCache {
uint16 distances[NUM_INDUSTRYTYPES];
bool initialised = false;
static IndustryLocationDistanceCache *instance;
};
IndustryLocationDistanceCache *IndustryLocationDistanceCache::instance = nullptr;
static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Industry *current)
uint32 IndustriesScopeResolver::GetClosestIndustry(IndustryType type) const
{
if (type >= NUM_INDUSTRYTYPES) return UINT32_MAX;
if (IndustryLocationDistanceCache::instance != nullptr) {
IndustryLocationDistanceCache *cache = IndustryLocationDistanceCache::instance;
if (!cache->initialised) {
MemSetT(cache->distances, 0xFF, NUM_INDUSTRYTYPES);
for (const Industry *i : Industry::Iterate()) {
if (i == current || i->type >= NUM_INDUSTRYTYPES) continue;
uint dist = DistanceManhattan(tile, i->location.tile);
if (dist < (uint)cache->distances[i->type]) cache->distances[i->type] = (uint16)dist;
}
cache->initialised = true;
if (this->location_distance_cache == nullptr) {
this->location_distance_cache = std::make_unique<IndustryLocationDistanceCache>();
MemSetT(this->location_distance_cache->distances, 0xFF, NUM_INDUSTRYTYPES);
for (const Industry *i : Industry::Iterate()) {
if (i == this->industry || i->type >= NUM_INDUSTRYTYPES) continue;
uint dist = DistanceManhattan(this->tile, i->location.tile);
if (dist < (uint)this->location_distance_cache->distances[i->type]) this->location_distance_cache->distances[i->type] = (uint16)dist;
}
return cache->distances[type];
}
uint32 best_dist = UINT32_MAX;
for (const Industry *i : Industry::Iterate()) {
if (i->type != type || i == current) continue;
best_dist = std::min(best_dist, DistanceManhattan(tile, i->location.tile));
}
return best_dist;
return this->location_distance_cache->distances[type];
}
/**
@@ -131,10 +112,9 @@ static uint32 GetClosestIndustry(TileIndex tile, IndustryType type, const Indust
* @param param_setID parameter given to the callback, which is the set id, or the local id, in our terminology
* @param layout_filter on what layout do we filter?
* @param town_filter Do we filter on the same town as the current industry?
* @param current Industry for which the inquiry is made
* @return the formatted answer to the callback : rr(reserved) cc(count) dddd(manhattan distance of closest sister)
*/
static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, bool town_filter, const Industry *current, uint32 mask)
uint32 IndustriesScopeResolver::GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout_filter, bool town_filter, uint32 mask) const
{
uint32 GrfID = GetRegister(0x100); ///< Get the GRFID of the definition to look for in register 100h
IndustryType ind_index;
@@ -148,7 +128,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
break;
case 0xFFFFFFFF: // current grf
GrfID = GetIndustrySpec(current->type)->grf_prop.grffile->grfid;
GrfID = GetIndustrySpec(this->industry->type)->grf_prop.grffile->grfid;
FALLTHROUGH;
default: // use the grfid specified in register 100h
@@ -163,14 +143,14 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
if (layout_filter == 0 && !town_filter) {
/* If the filter is 0, it could be because none was specified as well as being really a 0.
* In either case, just do the regular var67 */
if (mask & 0xFFFF) closest_dist = GetClosestIndustry(current->location.tile, ind_index, current);
if (mask & 0xFFFF) closest_dist = this->GetClosestIndustry(ind_index);
if (mask & 0xFF0000) count = ClampTo<byte>(Industry::GetIndustryTypeCount(ind_index));
} else {
/* Count only those who match the same industry type and layout filter
* Unfortunately, we have to do it manually */
for (const Industry *i : Industry::Iterate()) {
if (i->type == ind_index && i != current && (i->selected_layout == layout_filter || layout_filter == 0) && (!town_filter || i->town == current->town)) {
closest_dist = std::min(closest_dist, DistanceManhattan(current->location.tile, i->location.tile));
if (i->type == ind_index && i != this->industry && (i->selected_layout == layout_filter || layout_filter == 0) && (!town_filter || i->town == this->industry->town)) {
closest_dist = std::min(closest_dist, DistanceManhattan(this->tile, i->location.tile));
count++;
}
}
@@ -309,7 +289,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
/* Distance of nearest industry of given type */
case 0x64:
if (this->tile == INVALID_TILE) break;
return GetClosestIndustry(this->tile, MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid), this->industry);
return this->GetClosestIndustry(MapNewGRFIndustryType(parameter, indspec->grf_prop.grffile->grfid));
/* Get town zone and Manhattan distance of closest town */
case 0x65: {
if (this->tile == INVALID_TILE) break;
@@ -334,7 +314,7 @@ static uint32 GetCountAndDistanceOfClosestInstance(byte param_setID, byte layout
layout_filter = GB(reg, 0, 8);
town_filter = HasBit(reg, 8);
}
return GetCountAndDistanceOfClosestInstance(parameter, layout_filter, town_filter, this->industry, extra->mask);
return this->GetCountAndDistanceOfClosestInstance(parameter, layout_filter, town_filter, extra->mask);
}
case 0x69:
@@ -580,14 +560,9 @@ CommandCost CheckIfCallBackAllowsCreation(TileIndex tile, IndustryType type, siz
ind.founder = founder;
ind.psa = nullptr;
IndustryLocationDistanceCache distance_cache;
IndustryLocationDistanceCache::instance = &distance_cache;
IndustriesResolverObject object(tile, &ind, type, seed, CBID_INDUSTRY_LOCATION, 0, creation_type);
uint16 result = object.ResolveCallback();
IndustryLocationDistanceCache::instance = nullptr;
/* Unlike the "normal" cases, not having a valid result means we allow
* the building of the industry, as that's how it's done in TTDP. */
if (result == CALLBACK_FAILED) return CommandCost();