QBezier Class Reference

#include <qbezier_p.h>

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 67 of file qbezier_p.h.

Member Function Documentation

addIfClose()

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

Definition at line 467 of file qbezier.cpp.

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addToPolygon() [1/2]

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

Definition at line 137 of file qbezier.cpp.

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addToPolygon() [2/2]

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

Definition at line 101 of file qbezier.cpp.

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bezierOnInterval()

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

Definition at line 614 of file qbezier.cpp.

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bounds()

QRectF QBezier::bounds

(

)

const

Definition at line 173 of file qbezier.cpp.

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coefficients()

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

inlinestatic

Definition at line 153 of file qbezier_p.h.

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derivedAt()

QPointF QBezier::derivedAt ( qreal  t ) const

inline

Definition at line 199 of file qbezier_p.h.

endTangent()

QLineF QBezier::endTangent ( ) const

inline

Definition at line 143 of file qbezier_p.h.

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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 70 of file qbezier_p.h.

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getSubRange()

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

Definition at line 81 of file qbezier.cpp.

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length()

qreal QBezier::length

(

qreal

error = 0.01

)

const

Definition at line 458 of file qbezier.cpp.

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mapBy()

QBezier QBezier::mapBy

(

const QTransform &

transform

)

const

Definition at line 76 of file qbezier.cpp.

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midPoint()

QPointF QBezier::midPoint ( ) const

inline

Definition at line 120 of file qbezier_p.h.

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midTangent()

QLineF QBezier::midTangent ( ) const

inline

Definition at line 125 of file qbezier_p.h.

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normalVector()

QPointF QBezier::normalVector ( qreal  t ) const

inline

Definition at line 189 of file qbezier_p.h.

parameterSplitLeft()

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

inline

Definition at line 242 of file qbezier_p.h.

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pointAt()

QPointF QBezier::pointAt ( qreal  t ) const

inline

Definition at line 164 of file qbezier_p.h.

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pt1()

QPointF QBezier::pt1 ( ) const

inline

Definition at line 95 of file qbezier_p.h.

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pt2()

QPointF QBezier::pt2 ( ) const

inline

Definition at line 96 of file qbezier_p.h.

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pt3()

QPointF QBezier::pt3 ( ) const

inline

Definition at line 97 of file qbezier_p.h.

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pt4()

QPointF QBezier::pt4 ( ) const

inline

Definition at line 98 of file qbezier_p.h.

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secondDerivedAt()

QPointF QBezier::secondDerivedAt ( qreal  t ) const

inline

Definition at line 214 of file qbezier_p.h.

shifted()

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

Definition at line 391 of file qbezier.cpp.

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split()

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

inline

Definition at line 225 of file qbezier_p.h.

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startTangent()

QLineF QBezier::startTangent ( ) const

inline

Definition at line 133 of file qbezier_p.h.

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stationaryYPoints()

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

Definition at line 532 of file qbezier.cpp.

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tAtLength()

qreal QBezier::tAtLength

(

qreal

len

)

const

Definition at line 581 of file qbezier.cpp.

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tForY()

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

Definition at line 490 of file qbezier.cpp.

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toPolygon()

QT_BEGIN_NAMESPACE QPolygonF QBezier::toPolygon

(

qreal

bezier_flattening_threshold = 0.5

)

const

Definition at line 57 of file qbezier.cpp.

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Member Data Documentation

x1

qreal QBezier::x1

Definition at line 117 of file qbezier_p.h.

x2

qreal QBezier::x2

Definition at line 117 of file qbezier_p.h.

x3

qreal QBezier::x3

Definition at line 117 of file qbezier_p.h.

x4

qreal QBezier::x4

Definition at line 117 of file qbezier_p.h.

y1

qreal QBezier::y1

Definition at line 117 of file qbezier_p.h.

y2

qreal QBezier::y2

Definition at line 117 of file qbezier_p.h.

y3

qreal QBezier::y3

Definition at line 117 of file qbezier_p.h.

y4

qreal QBezier::y4

Definition at line 117 of file qbezier_p.h.

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

• src/gui/painting/qbezier_p.h
• src/gui/painting/qbezier.cpp