Inkscape: Geom::Circle Class Reference

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Set of all points at a fixed distance from the center. More...

#include <circle.h>

Inheritance diagram for Geom::Circle:

Public Member Functions
	Circle ()

	Circle (Coord cx, Coord cy, Coord r)

	Circle (Point const &center, Coord r)

	Circle (Coord A, Coord B, Coord C, Coord D)

Point	center () const

Coord	center (Dim2 d) const

Coord	radius () const

Coord	area () const

bool	isDegenerate () const

void	setCenter (Point const &p)

void	setRadius (Coord c)

Rect	boundsFast () const

Rect	boundsExact () const

Point	initialPoint () const

Point	finalPoint () const

Point	pointAt (Coord t) const

Coord	valueAt (Coord t, Dim2 d) const

Coord	timeAt (Point const &p) const

Coord	nearestTime (Point const &p) const

bool	contains (Point const &p) const

bool	contains (Rect const &other) const

bool	contains (Circle const &other) const

bool	intersects (Line const &l) const

bool	intersects (LineSegment const &l) const

bool	intersects (Circle const &other) const

std::vector< ShapeIntersection >	intersect (Line const &other) const

std::vector< ShapeIntersection >	intersect (LineSegment const &other) const

std::vector< ShapeIntersection >	intersect (Circle const &other) const

void	setCoefficients (Coord A, Coord B, Coord C, Coord D)

void	coefficients (Coord &A, Coord &B, Coord &C, Coord &D) const

std::vector< Coord >	coefficients () const

Zoom	unitCircleTransform () const

Zoom	inverseUnitCircleTransform () const

EllipticalArc *	arc (Point const &initial, Point const &inner, Point const &final) const

D2< SBasis >	toSBasis () const

Circle &	operator*= (Translate const &t)

Circle &	operator*= (Rotate const &)

Circle &	operator*= (Zoom const &z)

bool	operator== (Circle const &other) const

void	fit (std::vector< Point > const &points)
	Fit the circle to the passed points using the least squares method.

Private Attributes
Point	_center

Coord	_radius

Detailed Description

Set of all points at a fixed distance from the center.

Definition at line 49 of file circle.h.

Constructor & Destructor Documentation

◆ Circle() [1/4]

Geom::Circle::Circle ( )

inline

Definition at line 60 of file circle.h.

◆ Circle() [2/4]

Geom::Circle::Circle	(	Coord	cx,
		Coord	cy,
		Coord	r
	)

inline

Definition at line 61 of file circle.h.

◆ Circle() [3/4]

Geom::Circle::Circle	(	Point const &	center,
		Coord	r
	)

inline

Definition at line 64 of file circle.h.

◆ Circle() [4/4]

Geom::Circle::Circle	(	Coord	A,
		Coord	B,
		Coord	C,
		Coord	D
	)

inline

Definition at line 68 of file circle.h.

References D, and setCoefficients().

Member Function Documentation

◆ arc()

EllipticalArc * Geom::Circle::arc	(	Point const &	initial,
		Point const &	inner,
		Point const &	final
	)		const

Parameters

inner a point whose angle with the circle center is inside the angle that the arc spans

Definition at line 254 of file circle.cpp.

References _center, _radius, Geom::Ellipse::arc(), inner(), Geom::X, and Geom::Y.

Referenced by Inkscape::LivePathEffect::path_from_piecewise_fix_cusps().

◆ area()

Coord Geom::Circle::area ( ) const

inline

Definition at line 78 of file circle.h.

References _radius.

◆ boundsExact()

Rect Geom::Circle::boundsExact ( ) const

inline

Definition at line 85 of file circle.h.

References boundsFast().

◆ boundsFast()

Rect Geom::Circle::boundsFast ( ) const

Definition at line 42 of file circle.cpp.

References _center, and _radius.

Referenced by boundsExact().

◆ center() [1/2]

Point Geom::Circle::center ( ) const

inline

Definition at line 75 of file circle.h.

References _center.

Referenced by Geom::are_near(), Geom::PathSink::feed(), and wrap_circle().

◆ center() [2/2]

Coord Geom::Circle::center ( Dim2 d ) const

inline

Definition at line 76 of file circle.h.

References _center.

◆ coefficients() [1/2]

std::vector< Coord > Geom::Circle::coefficients ( ) const

Definition at line 80 of file circle.cpp.

References c, and coefficients().

Referenced by coefficients().

◆ coefficients() [2/2]

void Geom::Circle::coefficients	(	Coord &	A,
		Coord &	B,
		Coord &	C,
		Coord &	D
	)		const

Definition at line 72 of file circle.cpp.

References _center, _radius, D, Geom::X, and Geom::Y.

Referenced by TEST().

◆ contains() [1/3]

bool Geom::Circle::contains ( Circle const & other ) const

Definition at line 137 of file circle.cpp.

References _center, _radius, and Geom::distance().

◆ contains() [2/3]

bool Geom::Circle::contains ( Point const & p ) const

inline

Definition at line 94 of file circle.h.

References _center, _radius, and Geom::distance().

Referenced by contains(), and intersect().

◆ contains() [3/3]

bool Geom::Circle::contains ( Rect const & other ) const

Definition at line 129 of file circle.cpp.

References contains(), and Geom::GenericRect< C >::corner().

◆ finalPoint()

Point Geom::Circle::finalPoint ( ) const

inline

Definition at line 88 of file circle.h.

References initialPoint().

◆ fit()

void Geom::Circle::fit ( std::vector< Point > const & points )

Fit the circle to the passed points using the least squares method.

Parameters

points Samples at the perimeter of the circle

Definition at line 282 of file circle.cpp.

References _center, _radius, Geom::distance(), and Geom::NL::LFMCircle::instance().

Referenced by tighten(), and wrap_circle().

◆ initialPoint()

Point Geom::Circle::initialPoint ( ) const

Definition at line 104 of file circle.cpp.

References _center, _radius, and Geom::X.

Referenced by finalPoint().

◆ intersect() [1/3]

std::vector< ShapeIntersection > Geom::Circle::intersect ( Circle const & other ) const

Definition at line 205 of file circle.cpp.

References _center, contains(), Geom::Point::cw(), Geom::intersects, Geom::Point::length(), Geom::lerp(), R, radius(), result, and timeAt().

◆ intersect() [2/3]

std::vector< ShapeIntersection > Geom::Circle::intersect ( Line const & other ) const

Definition at line 163 of file circle.cpp.

References _center, _radius, Geom::cross(), D, delta, Geom::Line::finalPoint(), Geom::Line::initialPoint(), Geom::Point::length(), result, timeAt(), Geom::Line::timeAt(), Geom::Line::vector(), Geom::Point::x(), and Geom::Point::y().

Referenced by intersect(), and Inkscape::LivePathEffect::path_from_piecewise_fix_cusps().

◆ intersect() [3/3]

std::vector< ShapeIntersection > Geom::Circle::intersect ( LineSegment const & other ) const

Definition at line 198 of file circle.cpp.

References Geom::filter_line_segment_intersections(), intersect(), and result.

◆ intersects() [1/3]

bool Geom::Circle::intersects ( Circle const & other ) const

Definition at line 155 of file circle.cpp.

References _center, _radius, and Geom::distance().

◆ intersects() [2/3]

bool Geom::Circle::intersects ( Line const & l ) const

Definition at line 144 of file circle.cpp.

References _radius, Geom::cross(), D, delta, Geom::Line::finalPoint(), Geom::Line::initialPoint(), Geom::Point::length(), and Geom::Line::vector().

◆ intersects() [3/3]

bool Geom::Circle::intersects ( LineSegment const & l ) const

◆ inverseUnitCircleTransform()

Zoom Geom::Circle::inverseUnitCircleTransform ( ) const

Definition at line 94 of file circle.cpp.

References _center, and _radius.

◆ isDegenerate()

bool Geom::Circle::isDegenerate ( ) const

inline

Definition at line 79 of file circle.h.

References _radius.

◆ nearestTime()

Coord Geom::Circle::nearestTime ( Point const & p ) const

Definition at line 125 of file circle.cpp.

References timeAt().

◆ operator*=() [1/3]

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

inline

Definition at line 124 of file circle.h.

◆ operator*=() [2/3]

Circle & Geom::Circle::operator*= ( Translate const & t )

inline

Definition at line 120 of file circle.h.

References _center.

◆ operator*=() [3/3]

Circle & Geom::Circle::operator*= ( Zoom const & z )

inline

Definition at line 127 of file circle.h.

References _center, _radius, and Geom::Zoom::scale().

◆ operator==()

bool Geom::Circle::operator== ( Circle const & other ) const

Definition at line 261 of file circle.cpp.

References _center, and _radius.

◆ pointAt()

Point Geom::Circle::pointAt ( Coord t ) const

Definition at line 111 of file circle.cpp.

References _center, and _radius.

◆ radius()

Coord Geom::Circle::radius ( ) const

inline

Definition at line 77 of file circle.h.

References _radius.

Referenced by Geom::are_near(), Geom::PathSink::feed(), intersect(), and wrap_circle().

◆ setCenter()

void Geom::Circle::setCenter ( Point const & p )

inline

Definition at line 81 of file circle.h.

References _center.

◆ setCoefficients()

void Geom::Circle::setCoefficients	(	Coord	A,
		Coord	B,
		Coord	C,
		Coord	D
	)

Definition at line 49 of file circle.cpp.

References _center, _radius, c, D, Geom::X, and Geom::Y.

Referenced by Circle(), TEST(), and wrap_circle().

◆ setRadius()

void Geom::Circle::setRadius ( Coord c )

inline

Definition at line 82 of file circle.h.

References _radius, and c.

◆ timeAt()

Coord Geom::Circle::timeAt ( Point const & p ) const

Definition at line 120 of file circle.cpp.

References _center, and Geom::atan2().

Referenced by intersect(), intersect(), and nearestTime().

◆ toSBasis()

D2< SBasis > Geom::Circle::toSBasis ( ) const

Definition at line 268 of file circle.cpp.

References _center, _radius, Geom::cos(), and Geom::sin().

Referenced by Inkscape::UI::Tools::PencilTool::_addFreehandPoint().

◆ unitCircleTransform()

Zoom Geom::Circle::unitCircleTransform ( ) const

Definition at line 88 of file circle.cpp.

References _center, and _radius.

◆ valueAt()

Coord Geom::Circle::valueAt	(	Coord	t,
		Dim2	d
	)		const

Definition at line 115 of file circle.cpp.

References _center, _radius, delta, and Geom::X.

Member Data Documentation

◆ _center

Point Geom::Circle::_center

private

Definition at line 56 of file circle.h.

Referenced by arc(), boundsFast(), center(), center(), coefficients(), contains(), contains(), fit(), initialPoint(), intersect(), intersect(), intersects(), inverseUnitCircleTransform(), operator*=(), operator*=(), operator==(), pointAt(), setCenter(), setCoefficients(), timeAt(), toSBasis(), unitCircleTransform(), and valueAt().

◆ _radius

Coord Geom::Circle::_radius

private

Definition at line 57 of file circle.h.

Referenced by arc(), area(), boundsFast(), coefficients(), contains(), contains(), fit(), initialPoint(), intersect(), intersects(), intersects(), inverseUnitCircleTransform(), isDegenerate(), operator*=(), operator==(), pointAt(), radius(), setCoefficients(), setRadius(), toSBasis(), unitCircleTransform(), and valueAt().

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

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

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Circle() [1/4]

◆ Circle() [2/4]

◆ Circle() [3/4]

◆ Circle() [4/4]

Member Function Documentation

◆ arc()

◆ area()

◆ boundsExact()

◆ boundsFast()

◆ center() [1/2]

◆ center() [2/2]

◆ coefficients() [1/2]

◆ coefficients() [2/2]

◆ contains() [1/3]

◆ contains() [2/3]

◆ contains() [3/3]

◆ finalPoint()

◆ fit()

◆ initialPoint()

◆ intersect() [1/3]

◆ intersect() [2/3]

◆ intersect() [3/3]

◆ intersects() [1/3]

◆ intersects() [2/3]

◆ intersects() [3/3]

◆ inverseUnitCircleTransform()

◆ isDegenerate()

◆ nearestTime()

◆ operator*=() [1/3]

◆ operator*=() [2/3]

◆ operator*=() [3/3]

◆ operator==()

◆ pointAt()

◆ radius()

◆ setCenter()

◆ setCoefficients()

◆ setRadius()

◆ timeAt()

◆ toSBasis()

◆ unitCircleTransform()

◆ valueAt()

Member Data Documentation

◆ _center

◆ _radius