DD::Image::Vector4 Class Reference

Public Member Functions
float &	operator[] (int i)
const float &	operator[] (int i) const
const float *	array () const
	Vector4 ()
	Vector4 (const float v[4])
	Vector4 (const double v[4])
	Vector4 (float a, float b, float c=0, float d=1)
void	set (float a, float b, float c=0, float d=1)
	Vector4 (const Vector3 &v, float d=1)
void	set (const Vector3 &v, float d=1)
Vector3	divide_w () const
Vector3	truncate_w () const
Vector4	operator* (float d) const
Vector4 &	operator*= (float d)
Vector4	operator/ (float d) const
Vector4 &	operator/= (float d)
Vector4	operator* (const Vector4 &v) const
Vector4 &	operator*= (const Vector4 &v)
Vector4	operator/ (const Vector4 &v) const
Vector4 &	operator/= (const Vector4 &v)
Vector4	operator+ (const Vector4 &v) const
Vector4 &	operator+= (const Vector4 &v)
Vector4	operator- () const
Vector4	operator- (const Vector4 &v) const
Vector4 &	operator-= (const Vector4 &v)
bool	operator== (const Vector4 &v) const
bool	operator!= (const Vector4 &v) const
bool	operator== (float d) const
bool	operator!= (float d) const
bool	operator< (const Vector4 &v) const
	Fairly arbitrary operator so you can store these in ordered arrays.
void	append (Hash &) const

Public Attributes
float	x
float	y
float	z
float	w

Friends
std::ostream &	operator<< (std::ostream &o, const Vector4 &)

Detailed Description

4-component vector. This is used to represent a point in 3D homogenous (perspective) space, and is also useful to represent an rgb color with alpha.

This object is NOT compatible with the SbVec4 template in the Inventor library. Several of the operators ignore the w and treat this as a Vector3. This was done as it made use of this in the 3D system much easier.

Constructor & Destructor Documentation

DD::Image::Vector4::Vector4 ( )

inline

Default Constructor.

DD::Image::Vector4::Vector4 ( const float  v[4] )

inline

Constructor from an array of numbers.

DD::Image::Vector4::Vector4 ( const double  v[4] )

inline

Constructor from an array of numbers.

DD::Image::Vector4::Vector4 ( float  a, float  b, float  c = 0, float  d = 1  )

inline

Constructor that sets all 4 numbers

DD::Image::Vector4::Vector4 ( const Vector3 &  v, float  d = 1  )

inline

Conversion from a Vector3

Member Function Documentation

float& DD::Image::Vector4::operator[] ( int  i )

inline

vector[0] is x, vector[1] is y, vector[2] is z, vector[3] is w.

const float& DD::Image::Vector4::operator[] ( int  i ) const

inline

vector[0] is x, vector[1] is y, vector[2] is z, vector[3] is w.

const float* DD::Image::Vector4::array ( ) const

inline

Returns a ponter that can be passed to OpenGL

Referenced by DD::Image::ParticlesSprite::draw_quad(), DD::Image::ComplexLightOp::shade_GL(), and DD::Image::LightOp::shade_GL().

void DD::Image::Vector4::set ( float  a, float  b, float  c = 0, float  d = 1  )

inline

Change all of xyzw.

Referenced by DD::Image::Mesh::create_point_uvs(), DD::Image::Material::engine(), DD::Image::ComplexLightOp::shade_GL(), DD::Image::LightOp::shade_GL(), and DD::Image::ParticlesSprite::tessellateSprite().

void DD::Image::Vector4::set ( const Vector3 &  v, float  d = 1  )

inline

Conversion from a Vector3

Vector3 DD::Image::Vector4::divide_w ( ) const

inline

Divides xyz by w and returns that

Referenced by DD::Image::CameraOp::draw_handle(), and DD::Image::ViewerContext::zoom().

Vector3 DD::Image::Vector4::truncate_w ( ) const

inline

Just ignores the w. This is correct for a distance where w==0.

Vector4 DD::Image::Vector4::operator* ( float  d ) const

inline

Multiplies all 4 numbers. This will multiply a distance. However if w is non-zero, the resulting 3D point will not move, because x/w will not change.

Vector4 DD::Image::Vector4::operator/ ( float  d ) const

inline

Divides all 4 numbers.

Vector4 DD::Image::Vector4::operator* ( const Vector4 &  v ) const

inline

Component-wise multiplication, useful for colors.

Vector4 DD::Image::Vector4::operator/ ( const Vector4 &  v ) const

inline

Component-wise division, useful for colors.

Vector4 DD::Image::Vector4::operator+ ( const Vector4 &  v ) const

inline

Component-wise addition.

Vector4 DD::Image::Vector4::operator- ( ) const

inline

Component-wise subtraction.

void Vector4::append

(

Hash &

hash

)

const

Add this to the Hash object.

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  o, const Vector4 &    )

friend

Writes it in nuke/tcl notation, with nested curly braces