Generates a random city using the meshes provided. More...

#include <CityMapGenerator.h>

Inheritance diagram for ACityMapGenerator:

Public Member Functions
Constructor and destructor
	ACityMapGenerator (const FObjectInitializer &ObjectInitializer)

	~ACityMapGenerator ()

Overriden from UObject
virtual void	PreSave (FObjectPreSaveContext ObjectSaveContext) override

Public Member Functions inherited from ACityMapMeshHolder
	ACityMapMeshHolder (const FObjectInitializer &ObjectInitializer)
	Initializes the mesh holders.

Private Member Functions
Overriden from ACityMapMeshHolder
virtual void	UpdateMap () override
	Here does nothing, implement in derived classes.

Map construction and update related methods
void	UpdateSeeds ()
	Update the random seeds. Generate random if no fixed seed is used.

void	GenerateGraph ()
	Regenerate the DCEL.

void	GenerateRoads ()
	Add the road meshes to the scene based on the current DCEL.

void	GenerateRoadMap ()
	Generate the road map image and save to disk if requested.

Private Attributes
Map generation properties
uint32	MapSizeX = 20u
	Size X of the map in map units.

uint32	MapSizeY = 20u
	Size Y of the map in map units.

bool	bGenerateRoads = true
	If false, no mesh is added, only the internal representation of road is generated.

bool	bUseFixedSeed = true
	If false, a random seed is generated each time.

int32	Seed = 123456789
	Seed of the random map generated.

Other private members
TUniquePtr< MapGen::DoublyConnectedEdgeList >	Dcel

TUniquePtr< MapGen::GraphParser >	DcelParser

Road map
bool	bTriggerRoadMapGeneration = false
	Trigger the generation a the road map image of the current layout (used for off-road and opposite lane invasion detection).

uint32	PixelsPerMapUnit = 50u
	The resolution in pixels per map unit of the road map.

bool	bLeftHandTraffic = false
	Whether the road map should be generated based on left-hand traffic.

bool	bSaveRoadMapToDisk = true
	If true, the road map encoded as an image is saved to disk.

bool	bDrawDebugPixelsToLevel = false
	If true, a debug point is drawn in the level for each pixel of the road map.

bool	bGenerateRoadMapOnSave = true
	The road map is re-computed on save so we always store an up-to-date version.

bool	bTagForSemanticSegmentation = false
	If true, activate the custom depth pass of each tagged actor in the level.

URoadMap *	RoadMap

URoadMap *	GetRoadMap ()

Additional Inherited Members
Protected Member Functions inherited from ACityMapMeshHolder
void	AddInstance (ECityMapMeshTag Tag, FTransform Transform)
	Add an instance of a mesh with a given transform.

void	AddInstance (ECityMapMeshTag Tag, uint32 X, uint32 Y)
	Add an instance of a mesh with a given tile location.

void	AddInstance (ECityMapMeshTag Tag, uint32 X, uint32 Y, float Angle)
	Add an instance of a mesh with a given tile location and rotation.

float	GetMapScale () const

UStaticMesh *	GetStaticMesh (ECityMapMeshTag Tag)
	Return the static mesh corresponding to Tag.

const UStaticMesh *	GetStaticMesh (ECityMapMeshTag Tag) const
	Return the static mesh corresponding to Tag.

ECityMapMeshTag	GetTag (const UStaticMesh &StaticMesh) const
	Return the tag corresponding to StaticMesh.

FVector	GetTileLocation (uint32 X, uint32 Y) const
	Return the 3D world location (relative to this actor) of the given 2D tile.

virtual void	OnConstruction (const FTransform &Transform) override
	Initializes the instantiators.

virtual void	PostInitializeComponents () override

void	SetStaticMesh (ECityMapMeshTag Tag, UStaticMesh *Mesh)
	Set the static mesh associated with Tag.

Detailed Description

Generates a random city using the meshes provided.

Note: At this point it only generates roads and sidewalks.

Definition at line 25 of file CityMapGenerator.h.

Constructor & Destructor Documentation

◆ ACityMapGenerator()

ACityMapGenerator::ACityMapGenerator ( const FObjectInitializer & ObjectInitializer )

Definition at line 52 of file CityMapGenerator.cpp.

References RoadMap.

◆ ~ACityMapGenerator()

ACityMapGenerator::~ACityMapGenerator ( )

Definition at line 58 of file CityMapGenerator.cpp.

Member Function Documentation

◆ GenerateGraph()

void ACityMapGenerator::GenerateGraph ( )

private

Regenerate the DCEL.

Definition at line 110 of file CityMapGenerator.cpp.

References Dcel, DcelParser, MapGen::GraphGenerator::Generate(), MapSizeX, MapSizeY, and Seed.

Referenced by UpdateMap().

◆ GenerateRoadMap()

void ACityMapGenerator::GenerateRoadMap ( )

private

Generate the road map image and save to disk if requested.

Definition at line 263 of file CityMapGenerator.cpp.

References bDrawDebugPixelsToLevel, bLeftHandTraffic, bSaveRoadMapToDisk, bTagForSemanticSegmentation, ACityMapMeshHolder::GetMapScale(), CityMapMeshTag::GetRoadIntersectionSize(), ACityMapMeshHolder::GetTag(), LineTrace(), MapSizeX, MapSizeY, PixelsPerMapUnit, URoadMap::Reset(), RoadMap, URoadMap::SaveAsPNG(), URoadMap::SetPixelAt(), and ATagger::TagActorsInLevel().

Referenced by PreSave(), and UpdateMap().

◆ GenerateRoads()

void ACityMapGenerator::GenerateRoads ( )

private

Add the road meshes to the scene based on the current DCEL.

Definition at line 154 of file CityMapGenerator.cpp.

References ADD_INTERSECTION, ACityMapMeshHolder::AddInstance(), Dcel, CityMapMeshTag::GetRoadIntersectionSize(), FHalfEdgeCounter::Insert(), node, MapGen::TIntersection, MapGen::Turn90Deg, x, MapGen::XIntersection, and y.

Referenced by UpdateMap().

◆ GetRoadMap()

URoadMap * ACityMapGenerator::GetRoadMap ( )

inline

Definition at line 65 of file CityMapGenerator.h.

◆ PreSave()

void ACityMapGenerator::PreSave ( FObjectPreSaveContext ObjectSaveContext )

overridevirtual

Definition at line 64 of file CityMapGenerator.cpp.

References bGenerateRoadMapOnSave, GenerateRoadMap(), and RoadMap.

◆ UpdateMap()

void ACityMapGenerator::UpdateMap ( )

overrideprivatevirtual

Here does nothing, implement in derived classes.

Reimplemented from ACityMapMeshHolder.

Definition at line 84 of file CityMapGenerator.cpp.

References bGenerateRoads, bTriggerRoadMapGeneration, GenerateGraph(), GenerateRoadMap(), GenerateRoads(), and UpdateSeeds().

◆ UpdateSeeds()

void ACityMapGenerator::UpdateSeeds ( )

private

Update the random seeds. Generate random if no fixed seed is used.

Definition at line 101 of file CityMapGenerator.cpp.

References bUseFixedSeed, and Seed.

Referenced by UpdateMap().

Member Data Documentation

◆ bDrawDebugPixelsToLevel

bool ACityMapGenerator::bDrawDebugPixelsToLevel = false

private

If true, a debug point is drawn in the level for each pixel of the road map.

Definition at line 155 of file CityMapGenerator.h.

Referenced by GenerateRoadMap().

◆ bGenerateRoadMapOnSave

bool ACityMapGenerator::bGenerateRoadMapOnSave = true

private

The road map is re-computed on save so we always store an up-to-date version.

Uncheck this only for testing purposes as the road map might get out-of-sync with the current road layout.

Definition at line 162 of file CityMapGenerator.h.

Referenced by PreSave().

◆ bGenerateRoads

bool ACityMapGenerator::bGenerateRoads = true

private

If false, no mesh is added, only the internal representation of road is generated.

Definition at line 112 of file CityMapGenerator.h.

Referenced by UpdateMap().

◆ bLeftHandTraffic

bool ACityMapGenerator::bLeftHandTraffic = false

private

Whether the road map should be generated based on left-hand traffic.

Definition at line 143 of file CityMapGenerator.h.

Referenced by GenerateRoadMap().

◆ bSaveRoadMapToDisk

bool ACityMapGenerator::bSaveRoadMapToDisk = true

private

If true, the road map encoded as an image is saved to disk.

The image is saved to the "Saved" folder of the project.

Definition at line 149 of file CityMapGenerator.h.

Referenced by GenerateRoadMap().

◆ bTagForSemanticSegmentation

bool ACityMapGenerator::bTagForSemanticSegmentation = false

private

If true, activate the custom depth pass of each tagged actor in the level.

This pass is necessary for rendering the semantic segmentation. However, it may add a performance penalty since occlusion doesn't seem to be applied to objects having this value active.

Definition at line 170 of file CityMapGenerator.h.

Referenced by GenerateRoadMap().

◆ bTriggerRoadMapGeneration

bool ACityMapGenerator::bTriggerRoadMapGeneration = false

private

Trigger the generation a the road map image of the current layout (used for off-road and opposite lane invasion detection).

Definition at line 133 of file CityMapGenerator.h.

Referenced by UpdateMap().

◆ bUseFixedSeed

bool ACityMapGenerator::bUseFixedSeed = true

private

If false, a random seed is generated each time.

Definition at line 116 of file CityMapGenerator.h.

Referenced by UpdateSeeds().

◆ Dcel

TUniquePtr<MapGen::DoublyConnectedEdgeList> ACityMapGenerator::Dcel

private

Definition at line 182 of file CityMapGenerator.h.

Referenced by GenerateGraph(), and GenerateRoads().

◆ DcelParser

TUniquePtr<MapGen::GraphParser> ACityMapGenerator::DcelParser

private

Definition at line 184 of file CityMapGenerator.h.

Referenced by GenerateGraph().

◆ MapSizeX

uint32 ACityMapGenerator::MapSizeX = 20u

private

Size X of the map in map units.

The map unit is calculated based in the tile mesh of the road (see Map Scale).

Definition at line 100 of file CityMapGenerator.h.

Referenced by GenerateGraph(), and GenerateRoadMap().

◆ MapSizeY

uint32 ACityMapGenerator::MapSizeY = 20u

private

Size Y of the map in map units.

The map unit is calculated based in the tile mesh of the road (see Map Scale).

Definition at line 106 of file CityMapGenerator.h.

Referenced by GenerateGraph(), and GenerateRoadMap().

◆ PixelsPerMapUnit

uint32 ACityMapGenerator::PixelsPerMapUnit = 50u

private

The resolution in pixels per map unit of the road map.

The map unit is calculated based in the tile mesh of the road (see Map Scale).

Definition at line 139 of file CityMapGenerator.h.

Referenced by GenerateRoadMap().

◆ RoadMap

URoadMap* ACityMapGenerator::RoadMap

private

Definition at line 173 of file CityMapGenerator.h.

Referenced by ACityMapGenerator(), GenerateRoadMap(), and PreSave().

◆ Seed

int32 ACityMapGenerator::Seed = 123456789

private

Seed of the random map generated.

Definition at line 120 of file CityMapGenerator.h.

Referenced by GenerateGraph(), and UpdateSeeds().

The documentation for this class was generated from the following files:

Public Member Functions

Private Member Functions

Private Attributes

Road map

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ACityMapGenerator()

◆ ~ACityMapGenerator()

Member Function Documentation

◆ GenerateGraph()

◆ GenerateRoadMap()

◆ GenerateRoads()

◆ GetRoadMap()

◆ PreSave()

◆ UpdateMap()

◆ UpdateSeeds()

Member Data Documentation

◆ bDrawDebugPixelsToLevel

◆ bGenerateRoadMapOnSave

◆ bGenerateRoads

◆ bLeftHandTraffic

◆ bSaveRoadMapToDisk

◆ bTagForSemanticSegmentation

◆ bTriggerRoadMapGeneration

◆ bUseFixedSeed

◆ Dcel

◆ DcelParser

◆ MapSizeX

◆ MapSizeY

◆ PixelsPerMapUnit

◆ RoadMap

◆ Seed