Geom::Rotate Class Reference

Rotation around the origin. More...

#include <transforms.h>

Inheritance diagram for Geom::Rotate:

Public Member Functions
	Rotate ()=default
	Construct a zero-degree rotation.
	Rotate (Coord theta)
	Construct a rotation from its angle in radians.
	Rotate (Point const &p)
	Construct a rotation from its characteristic vector.
	Rotate (Coord x, Coord y)
	Construct a rotation from the coordinates of its characteristic vector.
	operator Affine () const
Point const &	vector () const
	Get the characteristic vector of the rotation.
Coord	angle () const
Coord	operator[] (Dim2 dim) const
Coord	operator[] (unsigned dim) const
Rotate &	operator*= (Rotate const &o)
bool	operator== (Rotate const &o) const
Rotate	inverse () const
Public Member Functions inherited from Geom::TransformOperations< Rotate >
Affine	operator* (T2 const &t) const

Static Public Member Functions
static Rotate	identity ()
	Get a zero-degree rotation.
static Rotate	from_degrees (Coord deg)
	Construct a rotation from its angle in degrees.
static Affine	around (Point const &p, Coord angle)

Private Attributes
Point	vec = { 1, 0 }

Friends
class	Point

Detailed Description

Rotation around the origin.

Combine with translations to the origin and back to get a rotation around a different point.

Definition at line 185 of file transforms.h.

Constructor & Destructor Documentation

Rotate() [1/4]

Geom::Rotate::Rotate ( )

default

Construct a zero-degree rotation.

Referenced by around(), and from_degrees().

Rotate() [2/4]

Geom::Rotate::Rotate ( Coord  theta )

inlineexplicit

Construct a rotation from its angle in radians.

Positive arguments correspond to counter-clockwise rotations (if Y grows upwards).

Definition at line 194 of file transforms.h.

Rotate() [3/4]

Geom::Rotate::Rotate ( Point const &  p )

inlineexplicit

Construct a rotation from its characteristic vector.

Definition at line 196 of file transforms.h.

Rotate() [4/4]

Geom::Rotate::Rotate ( Coord  x, Coord  y  )

inlineexplicit

Construct a rotation from the coordinates of its characteristic vector.

Definition at line 198 of file transforms.h.

Member Function Documentation

angle()

Coord Geom::Rotate::angle ( ) const

inline

Definition at line 204 of file transforms.h.

References Geom::atan2(), and vec.

Referenced by around(), Inkscape::ObjectSet::move(), Inkscape::ObjectSet::moveScreen(), Geom::Ellipse::operator*=(), sp_namedview_document_from_window(), and Inkscape::UI::Widget::StatusBar::update_rotate().

around()

Affine Geom::Rotate::around ( Point const &  p, Coord  angle  )

static

Definition at line 142 of file transforms.cpp.

References angle(), result, and Rotate().

from_degrees()

static Rotate Geom::Rotate::from_degrees ( Coord  deg )

inlinestatic

Construct a rotation from its angle in degrees.

Positive arguments correspond to clockwise rotations if Y grows downwards.

Definition at line 218 of file transforms.h.

References Rotate().

Referenced by SPHatch::_calculateRenderInfo(), SPHatch::_calculateStripExtents(), Inkscape::LivePathEffect::LPETiling::doAfterEffect(), Inkscape::LivePathEffect::LPETiling::doBeforeEffect(), Inkscape::LivePathEffect::LPETiling::doEffect_path_post(), Inkscape::LivePathEffect::LPETangentToCurve::doEffect_pwd2(), Inkscape::LivePathEffect::LPEShowHandles::drawNode(), SPMarker::get_marker_transform(), getMarkerRotation(), Inkscape::PageManager::rotatePage(), Inkscape::ObjectSet::rotateRelative(), and wrap_transforms().

identity()

static Rotate Geom::Rotate::identity ( )

inlinestatic

Get a zero-degree rotation.

Definition at line 215 of file transforms.h.

Referenced by Geom::check_transforms().

inverse()

Rotate Geom::Rotate::inverse ( ) const

inline

Definition at line 209 of file transforms.h.

References Point, vec, Geom::X, and Geom::Y.

Referenced by Inkscape::UI::Tools::ToolBase::_keyboardMove(), Inkscape::UI::ControlPointSelection::_keyboardMove(), Inkscape::UI::Tools::PenTool::_lastpointMove(), Geom::EllipticalArc::_updateCenterAndAngles(), Inkscape::LivePathEffect::LPETiling::doAfterEffect(), Inkscape::LivePathEffect::LPECopyRotate::doAfterEffect(), Inkscape::LivePathEffect::LPEMeasureSegments::doBeforeEffect(), Inkscape::LivePathEffect::LPECopyRotate::doEffect_path_post(), Geom::ConvexHull::minAreaRotation(), Inkscape::SelTrans::rotateRequest(), GrDrag::selected_move(), and wrap_transforms().

operator Affine()

Geom::Rotate::operator Affine ( ) const

inline

Definition at line 199 of file transforms.h.

References vec, Geom::X, and Geom::Y.

operator*=()

Rotate & Geom::Rotate::operator*= ( Rotate const &  o )

inline

Definition at line 207 of file transforms.h.

References vec.

operator==()

bool Geom::Rotate::operator== ( Rotate const &  o ) const

inline

Definition at line 208 of file transforms.h.

References vec.

operator[]() [1/2]

Coord Geom::Rotate::operator[] ( Dim2  dim ) const

inline

Definition at line 205 of file transforms.h.

References vec.

operator[]() [2/2]

Coord Geom::Rotate::operator[] ( unsigned  dim ) const

inline

Definition at line 206 of file transforms.h.

References vec.

vector()

Point const & Geom::Rotate::vector ( ) const

inline

Get the characteristic vector of the rotation.

Returns

A vector that would be obtained by applying this transform to the X versor.

Definition at line 203 of file transforms.h.

References vec.

Friends And Related Symbol Documentation

Point

friend class Point

friend

Definition at line 221 of file transforms.h.

Referenced by inverse().

Member Data Documentation

vec

Point Geom::Rotate::vec = { 1, 0 }

private

Definition at line 188 of file transforms.h.

Referenced by angle(), inverse(), operator Affine(), operator*=(), Geom::Point::operator*=(), operator==(), operator[](), operator[](), and vector().

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

• /builds/inkscape/inkscape/src/3rdparty/2geom/include/2geom/transforms.h
• /builds/inkscape/inkscape/src/3rdparty/2geom/src/2geom/transforms.cpp