DD::Image::Vector2 Class Reference

Public Member Functions
float &	operator[] (int i)
const float &	operator[] (int i) const
const float *	array () const
	Vector2 (const Vector2 &i)
	Vector2 (const float v[2])
	Vector2 (const double v[2])
	Vector2 (float a, float b)
Vector2 &	operator= (const Vector2 &v)
void	set (float i)
void	set (float a, float b)
void	clear ()
Vector2	operator* (float d) const
Vector2 &	operator*= (float d)
Vector2	operator* (const Vector2 &v) const
Vector2 &	operator*= (const Vector2 &v)
Vector2	operator/ (float d) const
Vector2 &	operator/= (float d)
Vector2	operator/ (const Vector2 &v) const
Vector2 &	operator/= (const Vector2 &v)
Vector2	operator+ (const Vector2 &v) const
Vector2 &	operator+= (const Vector2 &v)
Vector2	operator- () const
Vector2	operator- (const Vector2 &v) const
Vector2 &	operator-= (const Vector2 &v)
bool	operator== (const Vector2 &v) const
bool	operator!= (const Vector2 &v) const
bool	operator== (float d) const
bool	operator!= (float d) const
bool	operator< (const Vector2 &v) const
	Fairly arbitrary operator so you can store these in ordered arrays.
float	length () const
float	lengthSquared () const
float	distanceBetween (const Vector2 &v) const
float	distanceSquared (const Vector2 &v) const
float	dot (const Vector2 &v) const
float	cross (const Vector2 &v) const
	Returns the Z component of the cross product, Ux*Vy-Uy*Vx.
float	normalize ()
	Change the vector to be unit length. Returns the original length.
void	negate ()
void	append (Hash &) const

Public Attributes
float	x
float	y

Friends
std::ostream &	operator<< (std::ostream &o, const Vector2 &)

Detailed Description

2-component vector, used to represent a point/vector in the plane.

This object is in general compatible with the SbVec2 template in the Inventor library. However it allows direct access to the x,y,z members, which imho makes math using this much easier to read.

See DD::Image::Vector3 for more details on the member functions.

Member Function Documentation

Vector2 DD::Image::Vector2::operator* ( const Vector2 &  v ) const

inline

This is component multiplication! Use dot() or cross() for vector multiply

Vector2 DD::Image::Vector2::operator/ ( const Vector2 &  v ) const

inline

Component-wise division.

float DD::Image::Vector2::distanceBetween ( const Vector2 &  v ) const

inline

Same as (this-v).length()

float DD::Image::Vector2::distanceSquared ( const Vector2 &  v ) const

inline

Same as (this-v).lengthSquared()

Referenced by DD::Image::Quadtree< T >::_add(), and DD::Image::Quadtree< unsigned >::add().

void Vector2::append

(

Hash &

hash

)

const

Add this to the Hash object.