Gid class

A Gid, Global Tile ID is a Tiled concept to represent the tiles inside int matrices. This wrapper is used by Layer and Chunk to provide more easy access to the user.

Normally the integer stored by tiled in those matrixes use bit operations to store two different elements of information:

  • the actual gid, i.e., the global id of the tile on your tileset
  • flip information

Each tileset tile placed in the world matrix can have arbitrary flip data. For tiled, Flip includes flips and rotation via the concept of the diagonal flip.

This class uses the documentation on tile flips below to extract that complexity from the user by using the Flips class.

Tile flipping

The highest three bits of the gid store the flipped states:

  • Bit 32 is used for storing whether the tile is horizontally flipped,
  • Bit 31 is used for the vertically flipped tiles and
  • Bit 30 indicates whether the tile is flipped (anti) diagonally, enabling tile rotation.

These bits have to be read and cleared before you can find out which tileset a tile belongs to.

When rendering a tile, the order of operation matters. The diagonal flip (x/y axis swap) is done first, followed by the horizontal and vertical flips.

Constructors

Gid(int tile, Flips flips)
const
Gid.fromInt(int gid)
factory

Properties

flips → Flips
final
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
tile → int
final

Methods

copyWith({int? tile, Flips? flips}) → Gid
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

generate(List<int> data, int width, int height) → List<List<Gid>>