MxRegion Class Reference

[AI] Represents a 2D region as a set of vertical spans each containing one or more horizontal segments. More...

#include <mxregion.h>

Inheritance diagram for MxRegion:

Collaboration diagram for MxRegion:

Public Member Functions
	MxRegion ()
	[AI] Constructs an (initially empty) region. More...
	~MxRegion () override
	[AI] Destructor; destroys all spans and contained segments. More...
MxRect32 &	GetBoundingRect ()
	[AI] Returns a reference to the current bounding rectangle for the region. More...
virtual void	Reset ()
	[AI] Removes all spans and resets the bounding rectangle to an empty state. More...
virtual void	AddRect (MxRect32 &p_rect)
	[AI] Adds a rectangle to this region, merging or splitting spans and segments as necessary. More...
virtual MxBool	Intersects (MxRect32 &p_rect)
	[AI] Checks if this region intersects with a given rectangle (any overlap between the region's covered area and p_rect). More...
virtual MxBool	IsEmpty ()
	[AI] Returns TRUE if the region contains zero spans (i.e., is empty). More...
void	Compact ()
	[AI] Compacts the region's internal structure, merging adjacent/overlapping spans and segments when possible. More...
Public Member Functions inherited from MxCore
	MxCore ()
	[AI] Constructs a new MxCore object and assigns it a unique id. More...
virtual	~MxCore ()
	[AI] Virtual destructor. Required for correct polymorphic cleanup in derived classes. More...
virtual MxLong	Notify (MxParam &p_param)
	[AI] Virtual callback notification mechanism. More...
virtual MxResult	Tickle ()
	[AI] Called by tickle managers to allow the object to update itself. More...
virtual const char *	ClassName () const
	[AI] Returns the runtime class name of this object. More...
virtual MxBool	IsA (const char *p_name) const
	[AI] Checks whether this object's class type or parents match the given name. More...
MxU32	GetId ()
	[AI] Gets the unique (per-process) id assigned to this object instance. More...

Protected Attributes
MxSpanList *	m_spanList
	[AI] List of vertical spans for the region. [AI] More...
MxRect32	m_boundingRect
	[AI] Cached bounding rectangle for the whole region. [AI] More...

Friends
class	MxRegionCursor

Detailed Description

[AI] Represents a 2D region as a set of vertical spans each containing one or more horizontal segments.

Used to describe complex areas for rasterization or clipping. Internally implemented as a list of spans, each containing their horizontal segments, forming an efficient structure for union, intersection, and decomposition.

Definition at line 327 of file mxregion.h.

Constructor & Destructor Documentation

MxRegion()

MxRegion::MxRegion

(

)

[AI] Constructs an (initially empty) region.

[AI]

Definition at line 12 of file mxregion.cpp.

~MxRegion()

MxRegion::~MxRegion ( )

override

[AI] Destructor; destroys all spans and contained segments.

Definition at line 20 of file mxregion.cpp.

Member Function Documentation

AddRect()

void MxRegion::AddRect ( MxRect32 &  p_rect )

virtual

[AI] Adds a rectangle to this region, merging or splitting spans and segments as necessary.

[AI]

Parameters

p_rect

Rectangle to be added. [AI]

Definition at line 35 of file mxregion.cpp.

Compact()

void MxRegion::Compact

(

)

[AI] Compacts the region's internal structure, merging adjacent/overlapping spans and segments when possible.

GetBoundingRect()

MxRect32 & MxRegion::GetBoundingRect ( )

inline

[AI] Returns a reference to the current bounding rectangle for the region.

[AI]

Definition at line 346 of file mxregion.h.

Intersects()

MxBool MxRegion::Intersects ( MxRect32 &  p_rect )

virtual

[AI] Checks if this region intersects with a given rectangle (any overlap between the region's covered area and p_rect).

Parameters

p_rect

Rectangle to check overlap against. [AI]

Returns

TRUE if any overlap exists, FALSE otherwise. [AI]

Definition at line 88 of file mxregion.cpp.

IsEmpty()

virtual MxBool MxRegion::IsEmpty ( )

inlinevirtual

[AI] Returns TRUE if the region contains zero spans (i.e., is empty).

Definition at line 369 of file mxregion.h.

Reset()

void MxRegion::Reset ( )

virtual

[AI] Removes all spans and resets the bounding rectangle to an empty state.

[AI]

Definition at line 27 of file mxregion.cpp.

Friends And Related Function Documentation

MxRegionCursor

friend class MxRegionCursor

friend

Definition at line 376 of file mxregion.h.

Member Data Documentation

m_boundingRect

MxRect32 MxRegion::m_boundingRect

protected

[AI] Cached bounding rectangle for the whole region. [AI]

Definition at line 330 of file mxregion.h.

m_spanList

MxSpanList* MxRegion::m_spanList

protected

[AI] List of vertical spans for the region. [AI]

Definition at line 329 of file mxregion.h.

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

• mxregion.h
• mxregion.cpp