ChunkMatrix Class Reference

Public Member Functions
	ChunkMatrix (int _diameter, IntPoint center_chunk, MapTileMatrix &world_map)
void	populate_initial (IntPoint center_chunk, MapTileMatrix &world_map)
void	pretty_print ()
bool	out_of_bounds (IntPoint local_chunk_point)
IntPoint	get_offset ()
void	set_offset (IntPoint point)
Chunk *	get_chunk_abs (IntPoint abs_chunk_loc)
Chunk *	get_chunk_abs (int row, int col)
Chunk *	get_center_chunk ()
void	shift_matrix (IntPoint directions, MapTileMatrix &world_map)
void	serialize_all ()

Private Types
typedef std::vector < std::vector< MapTile > >	MapTileMatrix

Private Attributes
int	diameter
vector< vector< Chunk > >	model
IntPoint	offset

Member Function Documentation

Chunk * ChunkMatrix::get_center_chunk

(

)

TODO update more code to use this instead of get_chunk_abs(main_char.get_y(), main_char.get_x())

Returns

the central chunk in the model.

Chunk * ChunkMatrix::get_chunk_abs

(

IntPoint

abs_chunk_loc

)

Parameters

abs_chunk_loc

the absolute chunk coordinates on the world map.

Returns

a reference to the chunk from the local buffer.

Chunk * ChunkMatrix::get_chunk_abs	(	int	row,
		int	col
	)

The same as the other get_chunk_abs, but with two ints instead of an IntPoint.

IntPoint ChunkMatrix::get_offset

(

)

Returns

an IntPoint representing the amount by which the top left corner of the ChunkMatrix is offset from the top left corner of the world.

bool ChunkMatrix::out_of_bounds

(

IntPoint

local_chunk_point

)

Determines whether or not the given local coordinates on this small chunk map are out of bounds.

Parameters

[in]

chunk_point

an IntPoint representing a chunk's location on the private "model" matrix.

Returns

True if the given point cannot lie on the chunk map.

void ChunkMatrix::populate_initial	(	IntPoint	center_chunk,
		MapTileMatrix &	world_map
	)

Populates the chunk matrix initially, affecting the internal model.

Parameters

[in]	center_chunk	An IntPoint representing the central chunk in the matrix
[in]	world_map	The world map, passed by reference here to avoid copying.

void ChunkMatrix::pretty_print

(

)

Prints a graphic of the chunk matrix and its coordinates.

void ChunkMatrix::serialize_all

(

)

Serializes all the chunks in the chunk_map.

void ChunkMatrix::set_offset

(

IntPoint

point

)

Set the offset (amount by which the top left corner of the ChunkMatrix differs from the world's top left corner).

Parameters

[in]

point

a point representing a location on the world map.

void ChunkMatrix::shift_matrix	(	IntPoint	directions,
		MapTileMatrix &	world_map
	)

Shifts the contents of the chunk matrix.

Will shift the chunk buffer around on the world map, agnostic of the chunk buffer diameter. The concept of the chunk buffer is shown below. Periods are unloaded chunks on the world map, and x's are chunks within the chunk buffer (so, they are loaded). The buffer will move around, loading and unloading chunks as needed. Serialization and deserialization should all be handled in this function and the functions that it causes.

. . . . . . . . . . . . . . x x x . . . x x x . . . x x x . . . . . . .

Parameters

directions	an IntPoint representing the direction to shift the matrix: (1, 0) means one chunk to the right; (-1, -1) means one chunk to the left and one chunk up; (0, -1) means 1 chunk up, etc.
world_map	a reference to the world map.

Member Data Documentation

int ChunkMatrix::diameter

private

The diameter of this matrix.

vector<vector<Chunk> > ChunkMatrix::model

private

The base model where chunks are stored in a (diameter)*(diameter) two-dimensional vector.

IntPoint ChunkMatrix::offset

private

The amount by which the top left corner of the matrix is offset from the world.

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

• src/world/chunk_matrix.h
• src/world/chunk_matrix.cpp