#include <qbezier_p.h>

Collaboration diagram for QBezier:

Public Member Functions
QPointF	pointAt (qreal t) const

QPointF	normalVector (qreal t) const

QPointF	derivedAt (qreal t) const

QPointF	secondDerivedAt (qreal t) const

QPolygonF	toPolygon (qreal bezier_flattening_threshold=0.5) const

void	addToPolygon (QPolygonF *p, qreal bezier_flattening_threshold=0.5) const

void	addToPolygon (QDataBuffer< QPointF > &polygon, qreal bezier_flattening_threshold) const

QRectF	bounds () const

qreal	length (qreal error=0.01) const

void	addIfClose (qreal *length, qreal error) const

qreal	tAtLength (qreal len) const

int	stationaryYPoints (qreal &t0, qreal &t1) const

qreal	tForY (qreal t0, qreal t1, qreal y) const

QPointF	pt1 () const

QPointF	pt2 () const

QPointF	pt3 () const

QPointF	pt4 () const

QBezier	mapBy (const QTransform &transform) const

QPointF	midPoint () const

QLineF	midTangent () const

QLineF	startTangent () const

QLineF	endTangent () const

void	parameterSplitLeft (qreal t, QBezier *left)

std::pair< QBezier, QBezier >	split () const

int	shifted (QBezier *curveSegments, int maxSegmets, qreal offset, float threshold) const

QBezier	bezierOnInterval (qreal t0, qreal t1) const

QBezier	getSubRange (qreal t0, qreal t1) const

Static Public Member Functions
static QBezier	fromPoints (const QPointF &p1, const QPointF &p2, const QPointF &p3, const QPointF &p4)

static void	coefficients (qreal t, qreal &a, qreal &b, qreal &c, qreal &d)

Public Attributes
qreal	x1

qreal	y1

qreal	x2

qreal	y2

qreal	x3

qreal	y3

qreal	x4

qreal	y4

Detailed Description

Definition at line 30 of file qbezier_p.h.

Member Function Documentation

◆ addIfClose()

void QBezier::addIfClose	(	qreal *	length,
		qreal	error ) const

Definition at line 431 of file qbezier.cpp.

References error, QLineF::length(), split(), x3, x4, y3, and y4.

Referenced by length().

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◆ addToPolygon() [1/2]

void QBezier::addToPolygon	(	QDataBuffer< QPointF > &	polygon,
		qreal	bezier_flattening_threshold ) const

Definition at line 101 of file qbezier.cpp.

References d, qAbs(), and y4.

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◆ addToPolygon() [2/2]

void QBezier::addToPolygon	(	QPolygonF *	p,
		qreal	bezier_flattening_threshold = 0.5 ) const

Definition at line 65 of file qbezier.cpp.

References d, qAbs(), and y4.

Referenced by QOutlineMapper::curveTo(), toPolygon(), and QPainterPath::toSubpathPolygons().

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◆ bezierOnInterval()

QBezier QBezier::bezierOnInterval	(	qreal	t0,
		qreal	t1 ) const

Definition at line 578 of file qbezier.cpp.

References parameterSplitLeft(), and t0.

Referenced by operator<<().

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◆ bounds()

QRectF QBezier::bounds ( ) const

Definition at line 137 of file qbezier.cpp.

References x1, x2, x3, x4, y1, y2, y3, and y4.

Referenced by QPathSegments::addPath(), QOutlineMapper::curveTo(), qt_isect_curve_horizontal(), qt_isect_curve_vertical(), qt_painterpath_isect_curve(), and shift().

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◆ coefficients()

void QBezier::coefficients	(	qreal	t,
		qreal &	a,
		qreal &	b,
		qreal &	c,
		qreal &	d )

inlinestatic

Definition at line 116 of file qbezier_p.h.

References d.

Referenced by qt_find_ellipse_coords(), and tForY().

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◆ derivedAt()

QPointF QBezier::derivedAt ( qreal t ) const

inline

Definition at line 162 of file qbezier_p.h.

References d, x3, x4, y3, and y4.

◆ endTangent()

QLineF QBezier::endTangent ( ) const

inline

Definition at line 106 of file qbezier_p.h.

References QLineF::isNull(), pt1(), pt2(), pt3(), and pt4().

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◆ fromPoints()

static QBezier QBezier::fromPoints	(	const QPointF &	p1,
		const QPointF &	p2,
		const QPointF &	p3,
		const QPointF &	p4 )

inlinestatic

Definition at line 33 of file qbezier_p.h.

References p1, and p2.

Referenced by QPathSegments::addPath(), QOpenGL2PEXVertexArray::addPath(), bezierAtT(), QPainterPath::contains(), cubicTo_clipped(), QOutlineMapper::curveTo(), QQuadPath::fromPainterPath(), QTriangulator< T >::initialize(), QPainterPath::length(), mapBy(), QSubpathFlatIterator::next(), nextBezier(), QPainterPath::percentAtLength(), QDashedStrokeProcessor::process(), qt_curves_for_arc(), qt_painterpath_check_crossing(), qt_stroke_side(), shift(), split(), and QPainterPath::toSubpathPolygons().

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◆ getSubRange()

QBezier QBezier::getSubRange	(	qreal	t0,
		qreal	t1 ) const

Definition at line 45 of file qbezier.cpp.

References parameterSplitLeft(), and qFuzzyIsNull().

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◆ length()

qreal QBezier::length ( qreal error = 0.01 ) const

Definition at line 422 of file qbezier.cpp.

References addIfClose(), and error.

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◆ mapBy()

QBezier QBezier::mapBy ( const QTransform & transform ) const

Definition at line 40 of file qbezier.cpp.

References fromPoints(), pt1(), pt2(), pt3(), and pt4().

Referenced by qt_getInflectionPoints().

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◆ midPoint()

QPointF QBezier::midPoint ( ) const

inline

Definition at line 83 of file qbezier_p.h.

References x3, x4, y3, and y4.

Referenced by midTangent().

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◆ midTangent()

QLineF QBezier::midTangent ( ) const

inline

Definition at line 88 of file qbezier_p.h.

References dir, midPoint(), pointAt(), QPointF::x(), x3, x4, QPointF::y(), y3, and y4.

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◆ normalVector()

QPointF QBezier::normalVector ( qreal t ) const

inline

Definition at line 152 of file qbezier_p.h.

References x3, x4, y3, and y4.

◆ parameterSplitLeft()

void QBezier::parameterSplitLeft	(	qreal	t,
		QBezier *	left )

inline

Definition at line 205 of file qbezier_p.h.

References x1, x2, x3, x4, y1, y2, y3, and y4.

Referenced by bezierOnInterval(), getSubRange(), qt_addToQuadratics(), and tAtLength().

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◆ pointAt()

QPointF QBezier::pointAt ( qreal t ) const

inline

Definition at line 127 of file qbezier_p.h.

References x3, x4, y3, and y4.

Referenced by QPathSegments::addPath(), midTangent(), and tForY().

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◆ pt1()

QPointF QBezier::pt1 ( ) const

inline

Definition at line 58 of file qbezier_p.h.

Referenced by endTangent(), isLine(), mapBy(), qt_getInflectionPoints(), qt_painterpath_isect_curve(), qt_stroke_side(), split(), and startTangent().

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◆ pt2()

QPointF QBezier::pt2 ( ) const

inline

Definition at line 59 of file qbezier_p.h.

Referenced by endTangent(), isLine(), mapBy(), qt_getInflectionPoints(), split(), and startTangent().

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◆ pt3()

QPointF QBezier::pt3 ( ) const

inline

Definition at line 60 of file qbezier_p.h.

Referenced by endTangent(), isLine(), mapBy(), split(), and startTangent().

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◆ pt4()

QPointF QBezier::pt4 ( ) const

inline

Definition at line 61 of file qbezier_p.h.

Referenced by endTangent(), isLine(), mapBy(), qt_getInflectionPoints(), qt_painterpath_isect_curve(), split(), and startTangent().

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◆ secondDerivedAt()

QPointF QBezier::secondDerivedAt ( qreal t ) const

inline

Definition at line 177 of file qbezier_p.h.

References d, x3, x4, y3, and y4.

◆ shifted()

int QBezier::shifted	(	QBezier *	curveSegments,
		int	maxSegmets,
		qreal	offset,
		float	threshold ) const

Definition at line 355 of file qbezier.cpp.

References addCircle(), Circle, Discard, o, Ok, Q_ASSERT, qFuzzyCompare(), shift(), Split, x3, x4, y3, and y4.

Referenced by qt_stroke_side().

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◆ split()

std::pair< QBezier, QBezier > QBezier::split ( ) const

inline

Definition at line 188 of file qbezier_p.h.

References fromPoints(), pt1(), pt2(), pt3(), and pt4().

Referenced by addIfClose(), qt_isect_curve_horizontal(), qt_isect_curve_vertical(), and qt_painterpath_isect_curve().

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◆ startTangent()

QLineF QBezier::startTangent ( ) const

inline

Definition at line 96 of file qbezier_p.h.

References QLineF::isNull(), pt1(), pt2(), pt3(), and pt4().

Referenced by qt_stroke_side().

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◆ stationaryYPoints()

int QBezier::stationaryYPoints	(	qreal &	t0,
		qreal &	t1 ) const

Definition at line 496 of file qbezier.cpp.

References qFuzzyIsNull(), qSqrt(), qSwap(), t0, t1, y2, y3, and y4.

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◆ tAtLength()

qreal QBezier::tAtLength ( qreal len ) const

Definition at line 545 of file qbezier.cpp.

References error, parameterSplitLeft(), qAbs(), and qFuzzyCompare().

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◆ tForY()

qreal QBezier::tForY	(	qreal	t0,
		qreal	t1,
		qreal	y ) const

Definition at line 454 of file qbezier.cpp.

References coefficients(), d, pointAt(), Q_ASSERT, qAbs(), qSwap(), t0, t1, QPointF::y(), y3, and y4.

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◆ toPolygon()

QT_BEGIN_NAMESPACE QPolygonF QBezier::toPolygon ( qreal bezier_flattening_threshold = 0.5 ) const

Definition at line 21 of file qbezier.cpp.

References addToPolygon().

Referenced by QTriangulator< T >::initialize().

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Member Data Documentation

◆ x1

qreal QBezier::x1

Definition at line 80 of file qbezier_p.h.

Referenced by bounds(), parameterSplitLeft(), and shift().

◆ x2

qreal QBezier::x2

Definition at line 80 of file qbezier_p.h.

Referenced by bounds(), parameterSplitLeft(), and shift().

◆ x3

qreal QBezier::x3

Definition at line 80 of file qbezier_p.h.

Referenced by addIfClose(), bounds(), derivedAt(), midPoint(), midTangent(), normalVector(), parameterSplitLeft(), pointAt(), secondDerivedAt(), shift(), and shifted().

◆ x4

qreal QBezier::x4

Definition at line 80 of file qbezier_p.h.

Referenced by addIfClose(), bounds(), derivedAt(), midPoint(), midTangent(), normalVector(), parameterSplitLeft(), pointAt(), secondDerivedAt(), shift(), and shifted().

◆ y1

qreal QBezier::y1

Definition at line 80 of file qbezier_p.h.

Referenced by bounds(), parameterSplitLeft(), and shift().

◆ y2

qreal QBezier::y2

Definition at line 80 of file qbezier_p.h.

Referenced by bounds(), parameterSplitLeft(), shift(), and stationaryYPoints().

◆ y3

qreal QBezier::y3

Definition at line 80 of file qbezier_p.h.

Referenced by addIfClose(), bounds(), derivedAt(), midPoint(), midTangent(), normalVector(), parameterSplitLeft(), pointAt(), secondDerivedAt(), shift(), shifted(), stationaryYPoints(), and tForY().

◆ y4

qreal QBezier::y4

Definition at line 80 of file qbezier_p.h.

Referenced by addIfClose(), addToPolygon(), addToPolygon(), bounds(), derivedAt(), midPoint(), midTangent(), normalVector(), parameterSplitLeft(), pointAt(), secondDerivedAt(), shift(), shifted(), stationaryYPoints(), and tForY().

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

qtbase/src/gui/painting/qbezier_p.h (ac9e9687559df28dbd6bc9bb645006ff454e18bd)
qtbase/src/gui/painting/qbezier.cpp (3cc693d2565c5633382517145822bb5edc3106cd)

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation

◆ addIfClose()

◆ addToPolygon() [1/2]

◆ addToPolygon() [2/2]

◆ bezierOnInterval()

◆ bounds()

◆ coefficients()

◆ derivedAt()

◆ endTangent()

◆ fromPoints()

◆ getSubRange()

◆ length()

◆ mapBy()

◆ midPoint()

◆ midTangent()

◆ normalVector()

◆ parameterSplitLeft()

◆ pointAt()

◆ pt1()

◆ pt2()

◆ pt3()

◆ pt4()

◆ secondDerivedAt()

◆ shifted()

◆ split()

◆ startTangent()

◆ stationaryYPoints()

◆ tAtLength()

◆ tForY()

◆ toPolygon()

Member Data Documentation

◆ x1

◆ x2

◆ x3

◆ x4

◆ y1

◆ y2

◆ y3

◆ y4