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. More...
	Quadrangle (double, double)
	Create a horizontal quadrangle. More...
	~Quadrangle ()
	Empty.
Vector	Vertex (const double &, const double &) const
	Compute the position of a vertex inside the quadrangle. More...
Vector	Normal (const double &, const double &) const
	Compute the normal of a vertex inside the quadrangle. More...
Vector	Normal () const
	Compute the normal of the quadrangle. More...
void	Rotate (const Matrix &)
	Rotate the quadrangle. More...
void	Translate (const Vector &)
	Translate the quadrangle. More...
void	Scale (const double &)
	Scale the quadrangle. More...
void	Transform (const FrameScaled &)
	Transform the quadrangle. More...

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() [1/2]

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() [2/2]

Quadrangle::Quadrangle ( double  x, double  y  )

explicit

Create a horizontal quadrangle.

Parameters

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

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.

Translate()

void Quadrangle::Translate

(

const Vector &

t

)

Translate the 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.