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CGrid< SECTOR, SECS_X, SECS_Y > Class Template Reference

List of all members.

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Detailed Description

template<typename SECTOR, int SECS_X = 32, int SECS_Y = 32>
class CGrid< SECTOR, SECS_X, SECS_Y >

Grid - a 2D world partition.

A grid divides world space into fixed grid of rectangular sectors. World is divided on XY plane, so each sector represents a whole vertical "column" of the world.

Needed sector interface:

• void beginFrame();
• void endFrame();

Parameters:

SECTOR	Sector class.
SECS_X	Number of sectors along world X axis. Should be a power of 2.
SECS_Y	Number of sectors along world Y axis. Should be a power of 2.

Public Types
typedef SECTOR	TSector
	Sector type (from template argument).
Public Methods
	CGrid (SECTOR const &t=SECTOR())
	Constructor.
	~CGrid ()
	Destructor.
int	getSecsX () const
	Returns number of sectors along X axis.
int	getSecsY () const
	Returns number of sectors along Y axis.
int	getSecsCount () const
	Returns total number of sectors.
float	getStepX () const
	Returns sector size along X axis.
float	getStepY () const
	Returns sector size along Y axis.
float	getInvStepX () const
	Returns inverse sector size along X axis.
float	getInvStepY () const
	Returns inverse sector size along Y axis.
const SECTOR &	getSectorByPosition (float x, float y) const
	Returns read-only sector by world space position XY.
SECTOR &	getSectorByPosition (float x, float y)
	Returns sector by world space position XY.
const SECTOR &	getSectorByIndex (int ix, int iy) const
	Returns read-only sector by it's XY index.
SECTOR &	getSectorByIndex (int ix, int iy)
	Returns sector by it's XY index.
const SECTOR &	getSectorByIndex (int i) const
	Returns read-only sector by it's absolute index.
SECTOR &	getSectorByIndex (int i)
	Returns sector by it's absolute index.
int	position2Index (float x, float y) const
	Returns sector's absolute index from world XY position.
void	position2Index (float x, float y, int &ix, int &iy) const
	Returns sector's XY index from world XY position.

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Constructor & Destructor Documentation

template<typename SECTOR, int SECS_X = 32, int SECS_Y = 32> CGrid< SECTOR, SECS_X, SECS_Y >::CGrid (  SECTOR const &    t = SECTOR() )  [inline]

Constructor. Parameters: t  Sector object used to initialize all the sectors.

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