Detailed Description

Represents a bounding box whose axes are aligned with the coordinate system.

The box is usually referred by two corners, the start corner means the one whose coordinates are the smallest, while the end corner means the opposite.

Examples:: CurveBrush/CurveCreator.h, FixedFunctionMaterial/FixedFunctionMaterial.h, ImmediateModeRenderer/ImmediateModeRenderer.h, and ToonMaterial/ToonMaterial.h.

Definition at line 816 of file math.h.

#include <math.h>

List of all members.

Public Member Functions
	AxisAlignedBoundingBox (void)
	Creates an empty bounding box.
	AxisAlignedBoundingBox (const Vector &vStart, const Vector &vEnd)
	Creates an object by specifying two corners of the box.
	AxisAlignedBoundingBox (const Vector &vCenter, float fSize)
	Creates an object by specifying the center of it and the distance of the sides from the center.
	AxisAlignedBoundingBox (const AxisAlignedBoundingBox &cA)
	Creates an object by cloning another one.
AxisAlignedBoundingBox &	operator= (const AxisAlignedBoundingBox &cBB)
	Assigns the value of a box object to another one.
AxisAlignedBoundingBox &	operator+= (const AxisAlignedBoundingBox &cBB)
	Extends the box to contain another one.
bool	operator== (const AxisAlignedBoundingBox &cBB) const
	Returns true if two boxes are identical, false otherwise.
void	Reset (void)
	Makes the box empty.
void	Serialize (Stream &s)
	Writes/reads the object data to/from a stream.
bool	operator!= (const AxisAlignedBoundingBox &cBox) const
	returns true if the two boxes are different, false otherwise.
void	Extend (const Vector &)
	Extends the box to contain the passed point.
void	Extend (const AxisAlignedBoundingBox &bb)
	Extends the box to contain another one.
void	Transform (const class Matrix &mMatrix)
	Transforms the box with the passed-in matrix, and returns the smallest box which contains the result.
Vector	operator[] (int iCornerIndex) const
	Returns the corners of the box. Valid indexes are 0-7.
float	Size (void) const
	Returns the maximum edge length of the box.
float	XSize (void) const
	Returns the length of the box along the X axis.
float	YSize (void) const
	Returns the length of the box along the Y axis.
float	ZSize (void) const
	Returns the length of the box along the Y axis.
float	Volume (void) const
	Returns the volume of the box.
Vector	Center (void) const
	Returns the center of the box.
bool	IsPartOf (const AxisAlignedBoundingBox &cBB) const
	Returns true if the passed-in box contains this box.
bool	IsTouching (const AxisAlignedBoundingBox &cBB) const
	Returns true if the two boxes intersect at all.
bool	IsTouching (const Vector &vStart, const Vector &vEnd, float &fPlace) const
	Returns true if the box intersects any part of a specified line.
bool	IsContaining (const Vector &cV) const
	Returns true if the box contains the specified point.
bool	IsContaining (const AxisAlignedBoundingBox &b) const
	Returns true if the box contains the specified box.
bool	IsEmpty (void) const
	Returns true if the box is empy.
AxisAlignedBoundingBox	operator* (float fFactor)
	Multiplies the box coordinates with a scalar value.
Public Attributes
Vector	m_vStart
Vector	m_vEnd

Constructor & Destructor Documentation

AxisAlignedBoundingBox ( void ) [inline]

Creates an empty bounding box.

Definition at line 820 of file math.h.

{ Reset(); };

AxisAlignedBoundingBox	(	const Vector &	vStart,
		const Vector &	vEnd
	)		`[inline]`

Creates an object by specifying two corners of the box.

Definition at line 823 of file math.h.

                                                                       :
        m_vStart( vStart ),
        m_vEnd( vEnd ) {};

AxisAlignedBoundingBox	(	const Vector &	vCenter,
		float	fSize
	)		`[inline]`

Creates an object by specifying the center of it and the distance of the sides from the center.

This will be a cube.

Definition at line 829 of file math.h.

    {
        Vector v( fSize, fSize, fSize );
        m_vStart = vCenter-v;
        m_vEnd   = vCenter+v;
    };

AxisAlignedBoundingBox ( const AxisAlignedBoundingBox & cA ) [inline]

Creates an object by cloning another one.

Definition at line 837 of file math.h.

                                                               :
    m_vStart( cA.m_vStart ),
    m_vEnd( cA.m_vEnd ) {};

Member Function Documentation

AxisAlignedBoundingBox& operator= ( const AxisAlignedBoundingBox & cBB ) [inline]

Assigns the value of a box object to another one.

Definition at line 842 of file math.h.

    {
        m_vStart = cBB.m_vStart;
        m_vEnd = cBB.m_vEnd;
        return *this;
    };

AxisAlignedBoundingBox& operator+= ( const AxisAlignedBoundingBox & cBB ) [inline]

Extends the box to contain another one.

Definition at line 850 of file math.h.

    {
        for ( int i = 0; i < 8; i++ ) Extend( cBB[i] );
        return *this;
    };

bool operator== ( const AxisAlignedBoundingBox & cBB ) const [inline]

Returns true if two boxes are identical, false otherwise.

Definition at line 857 of file math.h.

    {
        return m_vStart == cBB.m_vStart && m_vEnd == cBB.m_vEnd;
    };

void Reset ( void ) [inline]

Search for all occurrences

Makes the box empty.

Definition at line 863 of file math.h.

    {
        m_vStart.Set( 0, 0, 0 );
        m_vEnd.Set( -1, -1, -1 );
    };

void Serialize ( Stream & s )

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Writes/reads the object data to/from a stream.

bool operator!= ( const AxisAlignedBoundingBox & cBox ) const [inline]

returns true if the two boxes are different, false otherwise.

Definition at line 874 of file math.h.

        { return !(operator ==(cBox)); };

void Extend ( const Vector & )

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Extends the box to contain the passed point.

void Extend ( const AxisAlignedBoundingBox & bb ) [inline]

Search for all occurrences

Extends the box to contain another one.

Definition at line 882 of file math.h.

    {
        if ( !bb.IsEmpty() ) {
            Extend( bb.m_vStart );
            Extend( bb.m_vEnd );
        };
    };

void Transform ( const class Matrix & mMatrix )

Search for all occurrences

Transforms the box with the passed-in matrix, and returns the smallest box which contains the result.

This is usually larger than the original box, because the transformation might rotate the box out of axis alignment.

Vector operator[] ( int iCornerIndex ) const

Returns the corners of the box. Valid indexes are 0-7.

float Size ( void ) const [inline]

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Returns the maximum edge length of the box.

Definition at line 901 of file math.h.

{ return Max( Max( XSize(), YSize() ), ZSize() ); };

float XSize ( void ) const [inline]

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Returns the length of the box along the X axis.

Definition at line 904 of file math.h.

{ return m_vEnd.m_fX-m_vStart.m_fX; };

float YSize ( void ) const [inline]

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Returns the length of the box along the Y axis.

Definition at line 907 of file math.h.

{ return m_vEnd.m_fY-m_vStart.m_fY; };

float ZSize ( void ) const [inline]

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Returns the length of the box along the Y axis.

Definition at line 910 of file math.h.

{ return m_vEnd.m_fZ-m_vStart.m_fZ; };

float Volume ( void ) const [inline]

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Returns the volume of the box.

Definition at line 913 of file math.h.

{ return XSize()*YSize()*ZSize(); };

Vector Center ( void ) const [inline]

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Returns the center of the box.

Definition at line 916 of file math.h.

{ return (m_vStart+m_vEnd)*0.5f; };

bool IsPartOf ( const AxisAlignedBoundingBox & cBB ) const [inline]

Search for all occurrences

Returns true if the passed-in box contains this box.

Definition at line 919 of file math.h.

    {
        return (
            m_vStart.m_fX >= cBB.m_vStart.m_fX && m_vEnd.m_fX <= cBB.m_vEnd.m_fX &&
            m_vStart.m_fY >= cBB.m_vStart.m_fY && m_vEnd.m_fY <= cBB.m_vEnd.m_fY &&
            m_vStart.m_fZ >= cBB.m_vStart.m_fZ && m_vEnd.m_fZ <= cBB.m_vEnd.m_fZ );
    };

bool IsTouching ( const AxisAlignedBoundingBox & cBB ) const [inline]

Search for all occurrences

Returns true if the two boxes intersect at all.

Definition at line 928 of file math.h.

    {
        return (
            m_vStart.m_fX < cBB.m_vEnd.m_fX && m_vEnd.m_fX > cBB.m_vStart.m_fX &&
            m_vStart.m_fY < cBB.m_vEnd.m_fY && m_vEnd.m_fY > cBB.m_vStart.m_fY &&
            m_vStart.m_fZ < cBB.m_vEnd.m_fZ && m_vEnd.m_fZ > cBB.m_vStart.m_fZ );
    };

bool IsTouching	(	const Vector &	vStart,
		const Vector &	vEnd,
		float &	fPlace
	)		const

Search for all occurrences

Returns true if the box intersects any part of a specified line.

If there is an intersection, then a point guaranteed to be inside the box is returned in the third argument (fPlace). That argument represents a location along the line from vStart to vEnd. (Location = vStart + fPlace*vEnd)

Parameters:

[in]	vStart	A point (represented as a Vector) defining the start of the line
[in]	vEnd	A point (represented as a Vector) defining the end of the line
[out]	fPlace	A number between 0.0 and 1.0, defining a position along the line that is guaranteed to be inside the box (if true was returned).

bool IsContaining ( const Vector & cV ) const [inline]

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Returns true if the box contains the specified point.

Definition at line 951 of file math.h.

    {
        return (
            m_vStart.m_fX <= cV.m_fX && m_vEnd.m_fX >= cV.m_fX &&
            m_vStart.m_fY <= cV.m_fY && m_vEnd.m_fY >= cV.m_fY &&
            m_vStart.m_fZ <= cV.m_fZ && m_vEnd.m_fZ >= cV.m_fZ );
    };

bool IsContaining ( const AxisAlignedBoundingBox & b ) const [inline]

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Returns true if the box contains the specified box.

Definition at line 961 of file math.h.

        { return IsContaining( b.m_vStart ) && IsContaining( b.m_vEnd ); };

bool IsEmpty ( void ) const [inline]

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Returns true if the box is empy.

Note that when the start and end corners are equal then the box is not treated as empty.

Definition at line 967 of file math.h.

{ return m_vStart.x > m_vEnd.x; };

AxisAlignedBoundingBox operator* ( float fFactor ) [inline]

Multiplies the box coordinates with a scalar value.

Definition at line 970 of file math.h.

    {
        return AxisAlignedBoundingBox( m_vStart*fFactor, m_vEnd*fFactor );
    };

Member Data Documentation

Vector m_vStart

Search for all occurrences

Definition at line 973 of file math.h.

Vector m_vEnd

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Definition at line 976 of file math.h.

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

math.h

AxisAlignedBoundingBox Class Reference

Detailed Description

Public Member Functions

Public Attributes

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation