Twist2 Class Reference

The twist deformation in the plane. More...

#include <twist.h>

Public Member Functions
	Twist2 (const Vector2 &, const double &, const double &, const double &)
	Creates a twisting operator.
	~Twist2 ()
	Empty.
Vector2	Transform (const Vector2 &) const
	Transforms a point.
Vector2	InverseTransform (const Vector2 &) const
	Inverse transformation of a point.
double	Angle () const
	Return the angle.
Box2	GetBox () const
	Compute the bouding box of the region where twist occurs.

Protected Attributes
Vector2	c = Vector::Null
	Center.
double	rb = 1.0
	Radii.
double	angle = 0.0
	Twisting angle.

Friends
std::ostream &	operator<< (std::ostream &s, const Twist2 &twist)
	Overloaded.

Detailed Description

The twist deformation in the plane.

Example of how to code a twist:

Twist2 twist(Vector(0,0,0),1.0,3.0,Math::Pi);

Constructor & Destructor Documentation

Twist2()

Twist2::Twist2 ( const Vector2 & c, const double & ra, const double & rb, const double & a )

explicit

Creates a twisting operator.

The deformation is enclosed in a disc delimited by the maximum radius, the region inside the smaller disc is simply rotated, whereas the region in the annulus is twisted.

Parameters

c	Center.
ra,rb	Radii.
a	Twisting angle.

Member Function Documentation

InverseTransform()

Vector2 Twist2::InverseTransform

(

const Vector2 &

p

)

const

Inverse transformation of a point.

Parameters

p	Argument point.

Transform()

Vector2 Twist2::Transform

(

const Vector2 &

p

)

const

Transforms a point.

Parameters

p	Argument point.