Class TesseraGenerator

GameObjects with this behaviour contain utilities to generate tile based levels using Wave Function Collapse (WFC). Call Generate(TesseraGenerateOptions) or StartGenerate(TesseraGenerateOptions) to run. The generation takes the following steps:

• Inspect the tiles in tiles and work out how they rotate and connect to each other.
• Setup any initial constraints that fix parts of the generation (initialConstraints).
• Fix the boundary of the generation if skyBox is set.
• Generate a set of tile instances that fits the above tiles and constraints.
• Optionally retries or backtrack.
• Instantiates the tile instances.

Inheritance

Object

TesseraGenerator

Namespace: Tessera

Assembly: cs.temp.dll.dll

Syntax

public class TesseraGenerator : MonoBehaviour

Fields

algorithm

Controls the algorithm used internally for Wave Function Collapse.

Declaration

public TesseraWfcAlgorithm algorithm

Field Value

Type	Description
TesseraWfcAlgorithm

backtrack

If set, backtracking will be used during generation. Backtracking can find solutions that would otherwise be failures, but can take a long time.

Declaration

public bool backtrack

Field Value

Type	Description
Boolean

contradictionTile

Game object to show in cells that cannot be solved.

Declaration

public GameObject contradictionTile

Field Value

Type	Description
GameObject

failureMode

Controls what is output when the generation fails.

Declaration

public FailureMode failureMode

Field Value

Type	Description
FailureMode

filterSurfaceSubmeshTiles

If true, and a surfaceMesh is set with multiple submeshes (materials), then use surfaceSubmeshTiles.

Declaration

public bool filterSurfaceSubmeshTiles

Field Value

Type	Description
Boolean

recordUndo

Records undo/redo when run by pressing the Generate button in the Inspector.

Declaration

public bool recordUndo

Field Value

Type	Description
Boolean

retries

If backtracking is off, how many times to retry generation if a solution cannot be found.

Declaration

public int retries

Field Value

Type	Description
Int32

scaleUncertainyTile

If true, the uncertainty tiles shrink as the solver gets more certain.

Declaration

public bool scaleUncertainyTile

Field Value

Type	Description
Boolean

searchInitialConstraints

If true, then active tiles in the scene will be taken as initial constraints. If false, then no initial constraints are used. Using initialConstraints overrides either outcome.

Declaration

public bool searchInitialConstraints

Field Value

Type	Description
Boolean

skyBox

If set, this tile is used to define extra initial constraints for the boundary.

Declaration

public TesseraTileBase skyBox

Field Value

Type	Description
TesseraTileBase

stepLimit

How many steps to take before retrying from the start.

Declaration

public int stepLimit

Field Value

Type	Description
Int32

surfaceMesh

If set, then tiles are generated on the surface of this mesh instead of a regular grid.

Declaration

public Mesh surfaceMesh

Field Value

Type	Description
Mesh

surfaceOffset

Height above the surface mesh that the bottom layer of tiles is generated at.

Declaration

public float surfaceOffset

Field Value

Type	Description
Single

surfaceSmoothNormals

Controls how normals are treated for meshes deformed to fit the surfaceMesh.

Declaration

public bool surfaceSmoothNormals

Field Value

Type	Description
Boolean

surfaceSubmeshTiles

A list of tiles to filter each submesh of surfaceMesh to. Ignored unless filterSurfaceSubmeshTiles is true.

Declaration

public List<TileList> surfaceSubmeshTiles

Field Value

Type	Description
List<TileList>

tiles

The list of tiles eligable for generation.

Declaration

public List<TileEntry> tiles

Field Value

Type	Description
List<TileEntry>

tileSize

The stride between each cell in the generation. "big" tiles may occupy a multiple of this tile size.

Declaration

public Vector3 tileSize

Field Value

Type	Description
Vector3

uncertaintyTile

Game object to show in cells that have yet to be fully solved.

Declaration

public GameObject uncertaintyTile

Field Value

Type	Description
GameObject

Properties

bounds

The area of generation. Setting this will cause the size to be rounded to a multiple of tileSize

Declaration

public Bounds bounds { get; set; }

Property Value

Type	Description
Bounds

CellType

Indicates the cell type of the tiles set up.

Declaration

public ICellType CellType { get; }

Property Value

Type	Description
ICellType

center

The local position of the center of the area to generate.

Declaration

public Vector3 center { get; set; }

Property Value

Type	Description
Vector3

origin

Declaration

public Vector3 origin { get; set; }

Property Value

Type	Description
Vector3

palette

Inherited from the first tile in tiles.

Declaration

public TesseraPalette palette { get; }

Property Value

Type	Description
TesseraPalette

size

The size of the generator area, counting in cells each of size tileSize.

Declaration

public Vector3Int size { get; set; }

Property Value

Type	Description
Vector3Int

Methods

Clear()

Clears previously generated content.

Declaration

public void Clear()

Generate(TesseraGenerateOptions)

Synchronously runs the generation process described in the class docs.

Declaration

public TesseraCompletion Generate(TesseraGenerateOptions options = null)

Parameters

Type	Name	Description
TesseraGenerateOptions	options

Returns

Type	Description
TesseraCompletion

GetCellTypes()

For validation purposes

Declaration

public IList<ICellType> GetCellTypes()

Returns

Type	Description
IList<ICellType>

GetInitialConstraintBuilder()

Declaration

public TesseraInitialConstraintBuilder GetInitialConstraintBuilder()

Returns

Type	Description
TesseraInitialConstraintBuilder

GetMissizedTiles()

For validation purposes

Declaration

public IEnumerable<TesseraTileBase> GetMissizedTiles()

Returns

Type	Description
IEnumerable<TesseraTileBase>

Instantiate(TesseraTileInstance, Transform)

Utility function that instantiates a tile instance in the scene. This is the default function used when you do not pass onCreate to the Generate method. It is essentially the same as Unity's normal Instantiate method with extra features:

• respects instantiateChildrenOnly
• applies mesh transformations (Pro only)

Declaration

public static GameObject[] Instantiate(TesseraTileInstance instance, Transform parent)

Parameters

Type	Name	Description
TesseraTileInstance	instance	The instance being created.
Transform	parent	The game object to parent the new game object to. This does not affect the world position of the instance

Returns

Type	Description
GameObject[]	The game objects created.

Regenerate(TesseraGenerateOptions)

Runs Clear, then Generate

Declaration

public TesseraCompletion Regenerate(TesseraGenerateOptions options = null)

Parameters

Type	Name	Description
TesseraGenerateOptions	options

Returns

Type	Description
TesseraCompletion

StartGenerate(TesseraGenerateOptions)

Asynchronously runs the generation process described in the class docs, for use with StartCoroutine.

Declaration

public EnumeratorWithResult<TesseraCompletion> StartGenerate(TesseraGenerateOptions options = null)

Parameters

Type	Name	Description
TesseraGenerateOptions	options

Returns

Type	Description
EnumeratorWithResult<TesseraCompletion>

Remarks

The default instantiation is still synchronous, so this can still cause frame glitches unless you override onCreate.