CBoundingBoxAligned Class Reference

#include <BoundingBoxAligned.h>

Public Member Functions
	CBoundingBoxAligned ()
	CBoundingBoxAligned (const CVector3D &min, const CVector3D &max)
void	Transform (const CMatrix3D &m, CBoundingBoxAligned &result) const
	Transforms these bounds according to the specified transformation matrix m, and writes the axis-aligned bounds of that result to result. More...
void	Transform (const CMatrix3D &m, CBoundingBoxOriented &result) const
	Transform these bounds using the matrix transform, and write out the result as an oriented (i.e. More...
CVector3D &	operator[] (int index)
const CVector3D &	operator[] (int index) const
void	SetEmpty ()
bool	IsEmpty () const
void	Extend (const CVector3D &min, const CVector3D &max)
CBoundingBoxAligned &	operator+= (const CBoundingBoxAligned &b)
CBoundingBoxAligned &	operator+= (const CVector3D &pt)
bool	RayIntersect (const CVector3D &origin, const CVector3D &dir, float &tmin, float &tmax) const
	Check if a given ray intersects this AABB. More...
float	GetVolume () const
void	GetCentre (CVector3D &centre) const
void	Expand (float amount)
	Expand the bounding box by the given amount in every direction. More...
void	IntersectFrustumConservative (const CFrustum &frustum)
	IntersectFrustumConservative: Approximate the intersection of this bounds object with the given frustum. More...
void	Render (CShaderProgramPtr &shader) const
	Render: Render the surfaces of the bound object as triangles. More...
void	RenderOutline (CShaderProgramPtr &shader) const
	Render: Render the outline of the bound object as lines. More...

Static Public Attributes
static const CBoundingBoxAligned	EMPTY = CBoundingBoxAligned()

Private Attributes
CVector3D	m_Data [2]

Detailed Description

Definition at line 35 of file BoundingBoxAligned.h.

Constructor & Destructor Documentation

CBoundingBoxAligned::CBoundingBoxAligned ( )

inline

Definition at line 39 of file BoundingBoxAligned.h.

CBoundingBoxAligned::CBoundingBoxAligned ( const CVector3D &  min, const CVector3D &  max  )

inline

Definition at line 40 of file BoundingBoxAligned.h.

Member Function Documentation

void CBoundingBoxAligned::Expand

(

float

amount

)

Expand the bounding box by the given amount in every direction.

Definition at line 216 of file BoundingBoxAligned.cpp.

void CBoundingBoxAligned::Extend ( const CVector3D &  min, const CVector3D &  max  )

inline

Definition at line 64 of file BoundingBoxAligned.h.

void CBoundingBoxAligned::GetCentre ( CVector3D &  centre ) const

inline

Definition at line 109 of file BoundingBoxAligned.h.

float CBoundingBoxAligned::GetVolume ( ) const

inline

Definition at line 102 of file BoundingBoxAligned.h.

void CBoundingBoxAligned::IntersectFrustumConservative

(

const CFrustum &

frustum

)

IntersectFrustumConservative: Approximate the intersection of this bounds object with the given frustum.

The bounds object is overwritten with the results.

The approximation is conservative in the sense that the result will always contain the actual intersection, but it may be larger than the intersection itself. The result will always be fully contained within the original bounds.

Note

While not in the spirit of this function's purpose, a no-op would be a correct implementation of this function.

If this bound is empty, the result is the empty bound.

Parameters

frustum

the frustum to intersect with

Definition at line 198 of file BoundingBoxAligned.cpp.

bool CBoundingBoxAligned::IsEmpty

(

)

const

Definition at line 131 of file BoundingBoxAligned.cpp.

CBoundingBoxAligned& CBoundingBoxAligned::operator+= ( const CBoundingBoxAligned &  b )

inline

Definition at line 75 of file BoundingBoxAligned.h.

CBoundingBoxAligned& CBoundingBoxAligned::operator+= ( const CVector3D &  pt )

inline

Definition at line 82 of file BoundingBoxAligned.h.

CVector3D& CBoundingBoxAligned::operator[] ( int  index )

inline

Definition at line 58 of file BoundingBoxAligned.h.

const CVector3D& CBoundingBoxAligned::operator[] ( int  index ) const

inline

Definition at line 59 of file BoundingBoxAligned.h.

bool CBoundingBoxAligned::RayIntersect	(	const CVector3D &	origin,
		const CVector3D &	dir,
		float &	tmin,
		float &	tmax
	)		const

Check if a given ray intersects this AABB.

See also Real-Time Rendering, Third Edition by T. Akenine-Moller, p. 741–742.

Parameters

[in]	origin	Origin of the ray.
[in]	dir	Direction vector of the ray, defining the positive direction of the ray. Must be of unit length.
[out]	tmin,tmax	distance in the positive direction from the origin of the ray to the entry and exit points in the bounding box. If the origin is inside the box, then this is counted as an intersection and one of tMin and tMax may be negative.

Returns

true if the ray originating in origin and with unit direction vector dir intersects this AABB, false otherwise.

Definition at line 42 of file BoundingBoxAligned.cpp.

void CBoundingBoxAligned::Render

(

CShaderProgramPtr &

shader

)

const

Render: Render the surfaces of the bound object as triangles.

Definition at line 224 of file BoundingBoxAligned.cpp.

void CBoundingBoxAligned::RenderOutline

(

CShaderProgramPtr &

shader

)

const

Render: Render the outline of the bound object as lines.

Definition at line 256 of file BoundingBoxAligned.cpp.

void CBoundingBoxAligned::SetEmpty

(

)

Definition at line 123 of file BoundingBoxAligned.cpp.

void CBoundingBoxAligned::Transform	(	const CMatrix3D &	m,
		CBoundingBoxAligned &	result
	)		const

Transforms these bounds according to the specified transformation matrix m, and writes the axis-aligned bounds of that result to result.

Definition at line 141 of file BoundingBoxAligned.cpp.

void CBoundingBoxAligned::Transform	(	const CMatrix3D &	m,
		CBoundingBoxOriented &	result
	)		const

Transform these bounds using the matrix transform, and write out the result as an oriented (i.e.

non-axis-aligned) box. The difference with Transform(const CMatrix3D&, CBoundingBoxAligned&) is that that method is equivalent to first computing this result, and then taking the axis-aligned bounding boxes from the result again.

Definition at line 166 of file BoundingBoxAligned.cpp.

Member Data Documentation

const CBoundingBoxAligned CBoundingBoxAligned::EMPTY = CBoundingBoxAligned()

static

Definition at line 150 of file BoundingBoxAligned.h.

CVector3D CBoundingBoxAligned::m_Data[2]

private

Definition at line 147 of file BoundingBoxAligned.h.

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

• /home/sathyam/0ad.svn/source/maths/BoundingBoxAligned.h
• /home/sathyam/0ad.svn/source/maths/BoundingBoxAligned.cpp