Quadrangle Class Reference

Quadrangles. More...

#include <quadrangle.h>

Public Member Functions
	Quadrangle ()
	Empty.
	Quadrangle (const Vector &, const Vector &, const Vector &, const Vector &)
	Create a quadrangle.
	Quadrangle (double, double)
	Create a horizontal quadrangle.
	Quadrangle (double)
	Create a horizontal quadrangle.
	~Quadrangle ()
	Empty.
Vector	Vertex (const double &, const double &) const
	Compute the position of a vertex inside the quadrangle.
Vector	Normal (const double &, const double &) const
	Compute the normal of a vertex inside the quadrangle.
Vector	Normal () const
	Compute the normal of the quadrangle.
void	Rotate (const Matrix &)
	Rotate the quadrangle.
void	Translate (const Vector &)
	Translate the quadrangle.
void	Scale (const double &)
	Scale the quadrangle.
void	Transform (const FrameScaled &)
	Transform the quadrangle.
Quadrangle	Transformed (const FrameScaled &) const
	Transform the quadrangle.
Quadrangle	Translated (const Vector &) const
	Return a translated quadrangle.

Protected Attributes
Vector	p [4] = { Vector::Null,Vector::X,Vector::X + Vector::Y,Vector::Y }
	Vertices, stored in counter-clockwize order.

Static Protected Attributes
static double	epsilon = 1.0e-10
	Internal \epsilon; constant.

Detailed Description

Quadrangles.

Quadrangles should be planar and convex.

Constructor & Destructor Documentation

Quadrangle() [1/3]

Quadrangle::Quadrangle ( const Vector & a, const Vector & b, const Vector & c, const Vector & d )

explicit

Create a quadrangle.

Parameters

a,b,c,d

Vertices.

Quadrangle() [2/3]

Quadrangle::Quadrangle ( double x, double y )

explicit

Create a horizontal quadrangle.

Parameters

x,y	Half size, the quadrangle vertexes will have (±x ±y) coordinates.

Quadrangle() [3/3]

Quadrangle::Quadrangle ( double r )

explicit

Create a horizontal quadrangle.

Parameters

r	Radius, i.e., half size.

See also

Quadrangle::Quadrangle(double, double)

Member Function Documentation

Normal() [1/2]

Vector Quadrangle::Normal

(

)

const

Compute the normal of the quadrangle.

The quadrangle should be flat.

Normal() [2/2]

Vector Quadrangle::Normal	(	const double &	u,
		const double &	v ) const

Compute the normal of a vertex inside the quadrangle.

Parameters

u,v	Parametric coordinates of the vertex.

Rotate()

void Quadrangle::Rotate

(

const Matrix &

r

)

Rotate the quadrangle.

Parameters

r	Rotation matrix.

Scale()

void Quadrangle::Scale

(

const double &

s

)

Scale the quadrangle.

Parameters

s	Scaling factor.

Transform()

void Quadrangle::Transform

(

const FrameScaled &

frame

)

Transform the quadrangle.

Parameters

frame

Transformation.

Transformed()

Quadrangle Quadrangle::Transformed

(

const FrameScaled &

frame

)

const

Transform the quadrangle.

Parameters

frame

Transformation.

Translate()

void Quadrangle::Translate

(

const Vector &

t

)

Translate the quadrangle.

Parameters

t	Translation vector.

Translated()

Quadrangle Quadrangle::Translated

(

const Vector &

t

)

const

Return a translated quadrangle.

Parameters

t	Translation vector.

Vertex()

Vector Quadrangle::Vertex	(	const double &	u,
		const double &	v ) const

Compute the position of a vertex inside the quadrangle.

Parameters

u,v	Parametric coordinates of the vertex.