WPSTransformation Class Reference

a transformation which stored the first row of a 3x3 perspective matrix More...

#include <libwps_internal.h>

Public Member Functions
	WPSTransformation (WPSVec3f const &xRow=WPSVec3f(1, 0, 0), WPSVec3f const &yRow=WPSVec3f(0, 1, 0))
	constructor More...
bool	isIdentity () const
	returns true if the matrix is an identity matrix More...
void	checkIdentity () const
	check if a matrix is the identity matrix More...
WPSVec3f const &	operator[] (int c) const
	the two extremum points which defined the box More...
Vec2f	operator* (Vec2f const &pt) const
	operator* for vec2f More...
Vec2f	multiplyDirection (Vec2f const &dir) const
	operator* for direction More...
WPSBox2f	operator* (WPSBox2f const &box) const
	operator* for box2f More...
WPSTransformation	operator* (WPSTransformation const &mat) const
	operator* for transform More...
WPSTransformation &	operator*= (WPSTransformation const &mat)
	operator*= More...
bool	operator== (WPSTransformation const &mat) const
	operator== More...
bool	operator!= (WPSTransformation const &mat) const
	operator!= More...
bool	operator< (WPSTransformation const &mat) const
	operator< More...
bool	operator<= (WPSTransformation const &mat) const
	operator<= More...
bool	operator> (WPSTransformation const &mat) const
	operator> More...
bool	operator>= (WPSTransformation const &mat) const
	operator>= More...
bool	decompose (float &rotation, Vec2f &shearing, WPSTransformation &transform, Vec2f const &center) const
	try to decompose the matrix in a rotation + scaling/translation matrix. More...

Static Public Member Functions
static WPSTransformation	translation (Vec2f const &trans)
	returns a translation transformation More...
static WPSTransformation	scale (Vec2f const &trans)
	returns a scaling transformation More...
static WPSTransformation	rotation (float angle, Vec2f const &center=Vec2f(0, 0))
	returns a rotation transformation around center. More...
static WPSTransformation	shear (Vec2f s, Vec2f const &center=Vec2f(0, 0))
	returns a shear transformation letting center invariant, ie. More...

Protected Attributes
std::pair< WPSVec3f, WPSVec3f >	m_data
	the data More...
bool	m_isIdentity
	flag to know if this matrix is an identity matrix More...

Detailed Description

a transformation which stored the first row of a 3x3 perspective matrix

Constructor & Destructor Documentation

WPSTransformation()

WPSTransformation::WPSTransformation ( WPSVec3f const &  xRow = WPSVec3f(1,0,0), WPSVec3f const &  yRow = WPSVec3f(0,1,0)  )

inlineexplicit

constructor

Member Function Documentation

checkIdentity()

void WPSTransformation::checkIdentity ( ) const

inline

check if a matrix is the identity matrix

Referenced by operator*().

decompose()

bool WPSTransformation::decompose	(	float &	rotation,
		Vec2f &	shearing,
		WPSTransformation &	transform,
		Vec2f const &	center
	)		const

try to decompose the matrix in a rotation + scaling/translation matrix.

Note: the center of rotation is given before applying the transformation(this)

Referenced by WPSGraphicShape::transform().

isIdentity()

bool WPSTransformation::isIdentity ( ) const

inline

returns true if the matrix is an identity matrix

Referenced by LotusGraph::readGraphic(), LotusGraph::sendZone(), and WPSGraphicShape::transform().

multiplyDirection()

Vec2f WPSTransformation::multiplyDirection ( Vec2f const &  dir ) const

inline

operator* for direction

operator!=()

bool WPSTransformation::operator!= ( WPSTransformation const &  mat ) const

inline

operator!=

operator*() [1/3]

Vec2f WPSTransformation::operator* ( Vec2f const &  pt ) const

inline

operator* for vec2f

operator*() [2/3]

WPSBox2f WPSTransformation::operator* ( WPSBox2f const &  box ) const

inline

operator* for box2f

operator*() [3/3]

WPSTransformation WPSTransformation::operator* ( WPSTransformation const &  mat ) const

inline

operator* for transform

operator*=()

WPSTransformation& WPSTransformation::operator*= ( WPSTransformation const &  mat )

inline

operator*=

operator<()

bool WPSTransformation::operator< ( WPSTransformation const &  mat ) const

inline

operator<

operator<=()

bool WPSTransformation::operator<= ( WPSTransformation const &  mat ) const

inline

operator<=

operator==()

bool WPSTransformation::operator== ( WPSTransformation const &  mat ) const

inline

operator==

operator>()

bool WPSTransformation::operator> ( WPSTransformation const &  mat ) const

inline

operator>

operator>=()

bool WPSTransformation::operator>= ( WPSTransformation const &  mat ) const

inline

operator>=

operator[]()

WPSVec3f const& WPSTransformation::operator[] ( int  c ) const

inline

the two extremum points which defined the box

Parameters

c	0 means the minimum and 1 the maximum

rotation()

WPSTransformation WPSTransformation::rotation ( float  angle, Vec2f const &  center = Vec2f(0,0)  )

static

returns a rotation transformation around center.

Note

angle must be given in degree

Referenced by decompose(), and LotusGraphInternal::ZonePc::getTransformation().

scale()

static WPSTransformation WPSTransformation::scale ( Vec2f const &  trans )

inlinestatic

returns a scaling transformation

shear()

static WPSTransformation WPSTransformation::shear ( Vec2f  s, Vec2f const &  center = Vec2f(0,0)  )

inlinestatic

returns a shear transformation letting center invariant, ie.

a matrix ( 1 s[0] -s[0]*center[1], s[1] 1 -s[1]*center[0], 0 0 1)

Referenced by decompose().

translation()

static WPSTransformation WPSTransformation::translation ( Vec2f const &  trans )

inlinestatic

returns a translation transformation

Referenced by LotusGraphInternal::ZonePc::getTransformation().

Member Data Documentation

m_data

std::pair<WPSVec3f, WPSVec3f > WPSTransformation::m_data

protected

the data

Referenced by operator!=(), operator*(), operator<(), operator<=(), operator==(), operator>(), and operator>=().

m_isIdentity

bool WPSTransformation::m_isIdentity

mutableprotected

flag to know if this matrix is an identity matrix

Referenced by operator*(), and operator*=().

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The documentation for this class was generated from the following files:

• libwps_internal.h
• libwps_internal.cpp