C# Class Axiom.Components.Paging.Grid2DPageStrategyData

Specialisation of PageStrategyData for GridPageStrategy.

Structurally this data defines with a grid of pages, with the logical origin in the middle of the entire grid. The grid cells are indexed from 0 as a 'centre' slot, supporting both positive and negative values. so (0,0) is the centre cell, (1,0) is the cell to the right of the centre, (1,0) is the cell above the centre, (-2,1) is the cell two to the left of the centre and one up, etc. The maximum extent of each axis is -32768 to +32767, so in other words enough for over 4 billion entries. @par To limit the page load requests that are generated to a fixed region, you can set the min and max cell indexes (inclusive)for each direction; if a page request would address a cell outside this range it is ignored so you don't have the expense of checking for page data that will never exist. @par The data format for this in a file is:
Grid2DPageStrategyData (Identifier 'G2DD')\n [Version 1]

Name	Type	Description
Grid orientation	byte	The orientation of the grid; XZ = 0, XY = 1, YZ = 2
Grid origin	Vector3	World origin of the grid.
Grid cell size	Real	The size of each cell (page) in the grid
Grid cell range (minx, maxx, miny, maxy)	short * 4	The extents of the world in cell indexes
Load radius	Real	The outer radius at which new pages should start loading
Hold radius	Real	The radius at which existing pages should be held if already loaded but not actively loaded (should be larger than Load radius)

Inheritance: IPageStrategyData

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Public Properties

Property	Type	Description
CHUNK_ID	uint
CHUNK_VERSION	ushort

Protected Properties

Property	Type	Description
mBottomLeft	Vector2
mCellSize	float
mGridExtentsHorz	int
mGridExtentsVert	int
mHoldRadius	float
mHoldRadiusInCells	float
mLoadRadius	float
mLoadRadiusInCells	float
mMode	Grid2Mode
mOrigin	Vector2
mWorldOrigin	Vector3

Public Methods

Method	Description
CalculatePageID ( int row, int col ) : PageID
CalculateRowCol ( PageID inPageID, int &row, int &col ) : void
ConvertGridToWorldSpace ( Vector2 grid, Vector3 &world ) : void	Convert a grid point to world space - note only 2 axes populated
ConvetWorldToGridSpace ( Vector3 world, Vector2 &grid ) : void	Convert a world point to grid space (not relative to origin)
DetermineGridLocation ( Vector2 gridPos, int &row, int &col ) : void	Convert a grid position into a row and column index
GetBottomLeftGridSpace ( int row, int col, Vector2 &bl ) : void	Get the (grid space) corners of a cell.
GetCornersGridSpace ( int row, int col, Vector2 &fourPoints ) : void
GetMidPointGridSpace ( int row, int col, Vector2 &mid ) : void	Get the (grid space) mid point of a cell
Grid2DPageStrategyData ( ) : System
Load ( StreamSerializer stream ) : bool	Load this data from a stream (returns true if successful)
Save ( StreamSerializer stream ) : void	Save this data to a stream
SetCellCount ( int horz, int vert ) : void	Set the number of cells in the grid in each dimension (defaults to max of 65536)

Protected Methods

Method	Description
UpdateDerivedMetrics ( ) : void

Method Details

CalculatePageID() public method

public CalculatePageID ( int row, int col ) : PageID
row	int
col	int
return	PageID

CalculateRowCol() public method

public CalculateRowCol ( PageID inPageID, int &row, int &col ) : void
inPageID	PageID
row	int
col	int
return	void

ConvertGridToWorldSpace() public method

Convert a grid point to world space - note only 2 axes populated

public ConvertGridToWorldSpace ( Vector2 grid, Vector3 &world ) : void
grid	Vector2
world	Vector3
return	void

ConvetWorldToGridSpace() public method

Convert a world point to grid space (not relative to origin)

public ConvetWorldToGridSpace ( Vector3 world, Vector2 &grid ) : void
world	Vector3
grid	Vector2
return	void

DetermineGridLocation() public method

Convert a grid position into a row and column index

public DetermineGridLocation ( Vector2 gridPos, int &row, int &col ) : void
gridPos	Vector2
row	int
col	int
return	void

GetBottomLeftGridSpace() public method

Get the (grid space) corners of a cell.

public GetBottomLeftGridSpace ( int row, int col, Vector2 &bl ) : void
row	int
col	int
bl	Vector2
return	void

GetCornersGridSpace() public method

public GetCornersGridSpace ( int row, int col, Vector2 &fourPoints ) : void
row	int
col	int
fourPoints	Vector2
return	void

GetMidPointGridSpace() public method

Get the (grid space) mid point of a cell

public GetMidPointGridSpace ( int row, int col, Vector2 &mid ) : void
row	int
col	int
mid	Vector2
return	void

Grid2DPageStrategyData() public method

public Grid2DPageStrategyData ( ) : System
return	System

Load() public method

Load this data from a stream (returns true if successful)

public Load ( StreamSerializer stream ) : bool
stream	Axiom.Serialization.StreamSerializer
return	bool

Save() public method

Save this data to a stream

public Save ( StreamSerializer stream ) : void
stream	Axiom.Serialization.StreamSerializer
return	void

SetCellCount() public method

Set the number of cells in the grid in each dimension (defaults to max of 65536)

public SetCellCount ( int horz, int vert ) : void
horz	int
vert	int
return	void

UpdateDerivedMetrics() protected method

protected UpdateDerivedMetrics ( ) : void
return	void

Property Details

CHUNK_ID public_oe static_oe property

public static uint CHUNK_ID
return	uint

CHUNK_VERSION public_oe static_oe property

public static ushort CHUNK_VERSION
return	ushort

mBottomLeft protected_oe property

Bottom-left position (grid-aligned world space)

protected Vector2 mBottomLeft
return	Vector2

mCellSize protected_oe property

Grid cell (page) size.

protected float mCellSize
return	float

mGridExtentsHorz protected_oe property

Grid horizontal extent in cells

protected int mGridExtentsHorz
return	int

mGridExtentsVert protected_oe property

Grid vertical extent in cells

protected int mGridExtentsVert
return	int

mHoldRadius protected_oe property

hold radius.

protected float mHoldRadius
return	float

mHoldRadiusInCells protected_oe property

protected float mHoldRadiusInCells
return	float

mLoadRadius protected_oe property

Load radius

protected float mLoadRadius
return	float

mLoadRadiusInCells protected_oe property

protected float mLoadRadiusInCells
return	float

mMode protected_oe property

Orientation of the grid.

protected Grid2Mode mMode
return	Grid2Mode

mOrigin protected_oe property

Origin (grid-aligned world space)

protected Vector2 mOrigin
return	Vector2

mWorldOrigin protected_oe property

Origin (world space)

protected Vector3 mWorldOrigin
return	Vector3