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Codechange: Reduced size of water region by not storing tile area

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Koen Bussemaker 2024-07-01 09:31:54 +02:00 committed by Kuhnovic
parent 8c7cf3bc75
commit a0845bba2c
1 changed files with 48 additions and 45 deletions
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93
src/pathfinder/water_regions.cpp
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@ -40,6 +40,18 @@ static inline TWaterRegionIndex GetWaterRegionIndex(TileIndex tile) { return Get
using TWaterRegionPatchLabelArray = std::array<TWaterRegionPatchLabel, WATER_REGION_NUMBER_OF_TILES>;
/**
* The data stored for each water region.
*/
class WaterRegionData {
friend class WaterRegion;
std::array<TWaterRegionTraversabilityBits, DIAGDIR_END> edge_traversability_bits{};
std::unique_ptr<TWaterRegionPatchLabelArray> tile_patch_labels; // Tile patch labels, this may be nullptr in the following trivial cases: region is invalid, region is only land (0 patches), region is only water (1 patch)
bool has_cross_region_aqueducts = false;
TWaterRegionPatchLabel number_of_patches = 0; // 0 = no water, 1 = one single patch of water, etc...
};
/**
* Represents a square section of the map of a fixed size. Within this square individual unconnected patches of water are
* identified using a Connected Component Labeling (CCL) algorithm. Note that all information stored in this class applies
@ -49,11 +61,8 @@ using TWaterRegionPatchLabelArray = std::array<TWaterRegionPatchLabel, WATER_REG
class WaterRegion
{
private:
std::array<TWaterRegionTraversabilityBits, DIAGDIR_END> edge_traversability_bits{};
bool has_cross_region_aqueducts = false;
TWaterRegionPatchLabel number_of_patches = 0; // 0 = no water, 1 = one single patch of water, etc...
WaterRegionData &data;
const OrthogonalTileArea tile_area;
std::unique_ptr<TWaterRegionPatchLabelArray> tile_patch_labels; ///< Tile patch labels, this may be nullptr in the following trivial cases: region is invalid, region is only land (0 patches), region is only water (1 patch)
/**
* Returns the local index of the tile within the region. The N corner represents 0,
@ -68,8 +77,9 @@ private:
}
public:
WaterRegion(int region_x, int region_y)
: tile_area(TileXY(region_x * WATER_REGION_EDGE_LENGTH, region_y * WATER_REGION_EDGE_LENGTH), WATER_REGION_EDGE_LENGTH, WATER_REGION_EDGE_LENGTH)
WaterRegion(int region_x, int region_y, WaterRegionData &water_region_data)
: data(water_region_data)
, tile_area(TileXY(region_x * WATER_REGION_EDGE_LENGTH, region_y * WATER_REGION_EDGE_LENGTH), WATER_REGION_EDGE_LENGTH, WATER_REGION_EDGE_LENGTH)
{}
OrthogonalTileIterator begin() const { return this->tile_area.begin(); }
@ -82,18 +92,18 @@ public:
* @param side Which side of the region we want to know the edge traversability of.
* @returns A value holding the edge traversability bits.
*/
TWaterRegionTraversabilityBits GetEdgeTraversabilityBits(DiagDirection side) const { return edge_traversability_bits[side]; }
TWaterRegionTraversabilityBits GetEdgeTraversabilityBits(DiagDirection side) const { return this->data.edge_traversability_bits[side]; }
/**
* @returns The amount of individual water patches present within the water region. A value of
* 0 means there is no water present in the water region at all.
*/
int NumberOfPatches() const { return this->number_of_patches; }
int NumberOfPatches() const { return this->data.number_of_patches; }
/**
* @returns Whether the water region contains aqueducts that cross the region boundaries.
*/
bool HasCrossRegionAqueducts() const { return this->has_cross_region_aqueducts; }
bool HasCrossRegionAqueducts() const { return this->data.has_cross_region_aqueducts; }
/**
* Returns the patch label that was assigned to the tile.
@ -103,10 +113,10 @@ public:
TWaterRegionPatchLabel GetLabel(TileIndex tile) const
{
assert(this->tile_area.Contains(tile));
if (this->tile_patch_labels == nullptr) {
if (this->data.tile_patch_labels == nullptr) {
return this->NumberOfPatches() == 0 ? INVALID_WATER_REGION_PATCH : 1;
}
return (*this->tile_patch_labels)[GetLocalIndex(tile)];
return (*this->data.tile_patch_labels)[GetLocalIndex(tile)];
}
/**
@ -116,15 +126,15 @@ public:
void ForceUpdate()
{
Debug(map, 3, "Updating water region ({},{})", GetWaterRegionX(this->tile_area.tile), GetWaterRegionY(this->tile_area.tile));
this->has_cross_region_aqueducts = false;
this->data.has_cross_region_aqueducts = false;
/* Acquire a tile patch label array if this region does not already have one */
if (this->tile_patch_labels == nullptr) {
this->tile_patch_labels = std::make_unique<TWaterRegionPatchLabelArray>();
if (this->data.tile_patch_labels == nullptr) {
this->data.tile_patch_labels = std::make_unique<TWaterRegionPatchLabelArray>();
}
this->tile_patch_labels->fill(INVALID_WATER_REGION_PATCH);
this->edge_traversability_bits.fill(0);
this->data.tile_patch_labels->fill(INVALID_WATER_REGION_PATCH);
this->data.edge_traversability_bits.fill(0);
TWaterRegionPatchLabel current_label = 1;
TWaterRegionPatchLabel highest_assigned_label = 0;
@ -144,7 +154,7 @@ public:
const TrackdirBits valid_dirs = TrackBitsToTrackdirBits(GetWaterTracks(tile));
if (valid_dirs == TRACKDIR_BIT_NONE) continue;
TWaterRegionPatchLabel &tile_patch = (*this->tile_patch_labels)[GetLocalIndex(tile)];
TWaterRegionPatchLabel &tile_patch = (*this->data.tile_patch_labels)[GetLocalIndex(tile)];
if (tile_patch != INVALID_WATER_REGION_PATCH) continue;
tile_patch = current_label;
@ -161,9 +171,9 @@ public:
assert(DistanceManhattan(ft.m_new_tile, tile) == 1);
const auto side = DiagdirBetweenTiles(tile, ft.m_new_tile);
const int local_x_or_y = DiagDirToAxis(side) == AXIS_X ? TileY(tile) - TileY(this->tile_area.tile) : TileX(tile) - TileX(this->tile_area.tile);
SetBit(this->edge_traversability_bits[side], local_x_or_y);
SetBit(this->data.edge_traversability_bits[side], local_x_or_y);
} else {
this->has_cross_region_aqueducts = true;
this->data.has_cross_region_aqueducts = true;
}
}
}
@ -172,12 +182,12 @@ public:
if (increase_label) current_label++;
}
this->number_of_patches = highest_assigned_label;
this->data.number_of_patches = highest_assigned_label;
if (this->number_of_patches == 0 || (this->number_of_patches == 1 &&
std::all_of(this->tile_patch_labels->begin(), this->tile_patch_labels->end(), [](TWaterRegionPatchLabel label) { return label == 1; }))) {
if (this->data.number_of_patches == 0 || (this->data.number_of_patches == 1 &&
std::all_of(this->data.tile_patch_labels->begin(), this->data.tile_patch_labels->end(), [](TWaterRegionPatchLabel label) { return label == 1; }))) {
/* No need for patch storage: trivial cases */
this->tile_patch_labels.reset();
this->data.tile_patch_labels.reset();
}
}
@ -185,10 +195,10 @@ public:
{
Debug(map, 9, "Water region {},{} labels and edge traversability = ...", GetWaterRegionX(tile_area.tile), GetWaterRegionY(tile_area.tile));
const size_t max_element_width = std::to_string(this->number_of_patches).size();
const size_t max_element_width = std::to_string(this->data.number_of_patches).size();
std::array<int, 16> traversability_NW{0};
for (auto bitIndex : SetBitIterator(edge_traversability_bits[DIAGDIR_NW])) *(traversability_NW.rbegin() + bitIndex) = 1;
for (auto bitIndex : SetBitIterator(this->data.edge_traversability_bits[DIAGDIR_NW])) *(traversability_NW.rbegin() + bitIndex) = 1;
Debug(map, 9, " {:{}}", fmt::join(traversability_NW, " "), max_element_width);
Debug(map, 9, " +{:->{}}+", "", WATER_REGION_EDGE_LENGTH * (max_element_width + 1) + 1);
@ -199,17 +209,17 @@ public:
const std::string label_str = label == INVALID_WATER_REGION_PATCH ? "." : std::to_string(label);
line = fmt::format("{:{}}", label_str, max_element_width) + " " + line;
}
Debug(map, 9, "{} | {}| {}", GB(this->edge_traversability_bits[DIAGDIR_SW], y, 1), line, GB(this->edge_traversability_bits[DIAGDIR_NE], y, 1));
Debug(map, 9, "{} | {}| {}", GB(this->data.edge_traversability_bits[DIAGDIR_SW], y, 1), line, GB(this->data.edge_traversability_bits[DIAGDIR_NE], y, 1));
}
Debug(map, 9, " +{:->{}}+", "", WATER_REGION_EDGE_LENGTH * (max_element_width + 1) + 1);
std::array<int, 16> traversability_SE{0};
for (auto bitIndex : SetBitIterator(edge_traversability_bits[DIAGDIR_SE])) *(traversability_SE.rbegin() + bitIndex) = 1;
for (auto bitIndex : SetBitIterator(this->data.edge_traversability_bits[DIAGDIR_SE])) *(traversability_SE.rbegin() + bitIndex) = 1;
Debug(map, 9, " {:{}}", fmt::join(traversability_SE, " "), max_element_width);
}
};
std::vector<WaterRegion> _water_regions;
std::vector<WaterRegionData> _water_region_data;
std::vector<bool> _is_water_region_valid;
TileIndex GetTileIndexFromLocalCoordinate(int region_x, int region_y, int local_x, int local_y)
@ -231,10 +241,10 @@ TileIndex GetEdgeTileCoordinate(int region_x, int region_y, DiagDirection side,
}
}
WaterRegion &GetUpdatedWaterRegion(uint16_t region_x, uint16_t region_y)
WaterRegion GetUpdatedWaterRegion(uint16_t region_x, uint16_t region_y)
{
const int index = GetWaterRegionIndex(region_x, region_y);
auto &water_region = _water_regions[index];
WaterRegion water_region(region_x, region_y, _water_region_data[index]);
if (!_is_water_region_valid[index]) {
water_region.ForceUpdate();
_is_water_region_valid[index] = true;
@ -242,7 +252,7 @@ WaterRegion &GetUpdatedWaterRegion(uint16_t region_x, uint16_t region_y)
return water_region;
}
WaterRegion &GetUpdatedWaterRegion(TileIndex tile)
WaterRegion GetUpdatedWaterRegion(TileIndex tile)
{
return GetUpdatedWaterRegion(GetWaterRegionX(tile), GetWaterRegionY(tile));
}
@ -290,7 +300,7 @@ WaterRegionDesc GetWaterRegionInfo(TileIndex tile)
*/
WaterRegionPatchDesc GetWaterRegionPatchInfo(TileIndex tile)
{
WaterRegion &region = GetUpdatedWaterRegion(tile);
const WaterRegion region = GetUpdatedWaterRegion(tile);
return WaterRegionPatchDesc{ GetWaterRegionX(tile), GetWaterRegionY(tile), region.GetLabel(tile)};
}
@ -330,7 +340,7 @@ static inline void VisitAdjacentWaterRegionPatchNeighbors(const WaterRegionPatch
{
if (water_region_patch.label == INVALID_WATER_REGION_PATCH) return;
const WaterRegion &current_region = GetUpdatedWaterRegion(water_region_patch.x, water_region_patch.y);
const WaterRegion current_region = GetUpdatedWaterRegion(water_region_patch.x, water_region_patch.y);
const TileIndexDiffC offset = TileIndexDiffCByDiagDir(side);
const int nx = water_region_patch.x + offset.x;
@ -338,7 +348,7 @@ static inline void VisitAdjacentWaterRegionPatchNeighbors(const WaterRegionPatch
if (nx < 0 || ny < 0 || nx >= GetWaterRegionMapSizeX() || ny >= GetWaterRegionMapSizeY()) return;
const WaterRegion &neighboring_region = GetUpdatedWaterRegion(nx, ny);
const WaterRegion neighboring_region = GetUpdatedWaterRegion(nx, ny);
const DiagDirection opposite_side = ReverseDiagDir(side);
/* Indicates via which local x or y coordinates (depends on the "side" parameter) we can cross over into the adjacent region. */
@ -379,7 +389,7 @@ void VisitWaterRegionPatchNeighbors(const WaterRegionPatchDesc &water_region_pat
{
if (water_region_patch.label == INVALID_WATER_REGION_PATCH) return;
const WaterRegion &current_region = GetUpdatedWaterRegion(water_region_patch.x, water_region_patch.y);
const WaterRegion current_region = GetUpdatedWaterRegion(water_region_patch.x, water_region_patch.y);
/* Visit adjacent water region patches in each cardinal direction */
for (DiagDirection side = DIAGDIR_BEGIN; side < DIAGDIR_END; side++) VisitAdjacentWaterRegionPatchNeighbors(water_region_patch, side, callback);
@ -402,21 +412,14 @@ void AllocateWaterRegions()
{
const int number_of_regions = GetWaterRegionMapSizeX() * GetWaterRegionMapSizeY();
_water_regions.clear();
_water_regions.reserve(number_of_regions);
_water_region_data.clear();
_water_region_data.resize(number_of_regions);
_is_water_region_valid.clear();
_is_water_region_valid.resize(number_of_regions, false);
Debug(map, 2, "Allocating {} x {} water regions", GetWaterRegionMapSizeX(), GetWaterRegionMapSizeY());
for (int region_y = 0; region_y < GetWaterRegionMapSizeY(); region_y++) {
for (int region_x = 0; region_x < GetWaterRegionMapSizeX(); region_x++) {
_water_regions.emplace_back(region_x, region_y);
}
}
assert(_is_water_region_valid.size() == _water_regions.size());
assert(_is_water_region_valid.size() == _water_region_data.size());
}
void PrintWaterRegionDebugInfo(TileIndex tile)