Pyramid Class Reference

An axis aligned pyramid. More...

#include <pyramid.h>

Public Member Functions
	Pyramid (const Vector &, const double &)
	Create a pyramid.
	Pyramid (const Vector &, const double &, const double &)
	Create a pyramid.
	Pyramid (const double &, const double &)
	Create a pyramid.
double	Volume () const
	Compute the volume of the pyramid.
double	Area () const
	Compute the area of the pyramid.
Vector	Vertex (int) const
	Return the i-th vertex as a vector.
Vector	Vertex (int, int) const
	Return the j-th vertex of the i-th face.
Vector	Normal (int) const
	Normalized normal to the i-th face.
Vector	Normal (const Vector &) const
	Compute the normal vector between a point and the pyramid.
double	R (const Vector &) const
	Compute the squared distance between a point and the pyramid.
double	Signed (const Vector &) const
	Compute the signed distance between a point and the pyramid.
Box	GetBox () const
	Return the bounding box of the pyramid.
bool	Inside (const Vector &) const
	Check if a point is inside the pyramid.

Static Public Member Functions
static int	VertexIndex (int, int)
	Return the index of the j-th vertex of the i-th face.

Protected Attributes
Vector	center = Vector::Null
	Center.
double	height = 1.0
	Height.
double	a = 1.0
	Half base-side size.
Vector	nt
	Normal to triangular face.
Vector	neaa
	Unit diagonal vector of the triangular faces.

Static Protected Attributes
static const int	face [6][3]
	Array of triangles.
static const Vector	vertex [5]
	Array of vertices.

Friends
std::ostream &	operator<< (std::ostream &s, const Pyramid &pyramid)
	Overloaded.

Detailed Description

An axis aligned pyramid.

Constructor & Destructor Documentation

Pyramid() [1/3]

Pyramid::Pyramid ( const Vector & c, const double & s )

explicit

Create a pyramid.

Parameters

c	Center.
s	Half base-side size, which will be height as well.

Pyramid() [2/3]

Pyramid::Pyramid ( const Vector & c, const double & s, const double & z )

explicit

Create a pyramid.

Parameters

c	Center.
s	Half base-side size.
z	Height.

Pyramid() [3/3]

Pyramid::Pyramid ( const double & s, const double & z )

explicit

Create a pyramid.

Parameters

s	Half base-side size.
z	Height.

Member Function Documentation

Area()

double Pyramid::Area

(

)

const

Compute the area of the pyramid.

It is eight times the area of the small triangle, plus surface of the base square

Inside()

bool Pyramid::Inside

(

const Vector &

p

)

const

Check if a point is inside the pyramid.

Parameters

p

Point.

Normal() [1/2]

Vector Pyramid::Normal

(

const Vector &

p

)

const

Compute the normal vector between a point and the pyramid.

Parameters

p

Point.

Normal() [2/2]

Vector Pyramid::Normal

(

int

i

)

const

Normalized normal to the i-th face.

Parameters

i

Index.

R()

double Pyramid::R

(

const Vector &

p

)

const

Compute the squared distance between a point and the pyramid.

Parameters

p	The point.

Signed()

double Pyramid::Signed

(

const Vector &

p

)

const

Compute the signed distance between a point and the pyramid.

Parameters

p

Point.

Friends And Related Symbol Documentation

operator<<

std::ostream & operator<< ( std::ostream & s, const Pyramid & pyramid )

friend

Overloaded.

Parameters

s	Stream.
pyramid	The pyramid.