QwtSplinePleasing - A spline with G1 continuity.

NAME  SYNOPSIS  Public Member Functions  Additional Inherited Members  Detailed Description  Constructor & Destructor Documentation  QwtSplinePleasing::QwtSplinePleasing ()  QwtSplinePleasing::˜QwtSplinePleasing () [virtual]  Member Function Documentation  QVector< QLineF > QwtSplinePleasing::bezierControlLines (const QPolygonF &points) const [override], [virtual]  uint QwtSplinePleasing::locality () const [override], [virtual]  QPainterPath QwtSplinePleasing::painterPath (const QPolygonF & points)const [override], [virtual]  Author 

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NAME

QwtSplinePleasing − A spline with G1 continuity.

SYNOPSIS

#include <qwt_spline_pleasing.h>

Inherits QwtSplineG1.

Public Member Functions

QwtSplinePleasing ()
Constructor.
virtual ˜QwtSplinePleasing ()
Destructor.
virtual uint locality () const override
virtual QPainterPath painterPath (const QPolygonF &) const override
Interpolate a curve with Bezier curves.
virtual QVector< QLineF > bezierControlLines (const QPolygonF &) const override
Interpolate a curve with Bezier curves.

Public Member Functions inherited from QwtSplineG1

QwtSplineG1 ()
Constructor.
virtual ˜QwtSplineG1 ()
Destructor.

Public Member Functions inherited from QwtSplineInterpolating

QwtSplineInterpolating ()
Constructor.
virtual ˜QwtSplineInterpolating ()
Destructor.
virtual QPolygonF equidistantPolygon (const QPolygonF &, double distance, bool withNodes) const
Find an interpolated polygon with equidistant"points.
virtual QPolygonF polygon (const QPolygonF &, double tolerance) const override
Interpolate a curve by a polygon.

Public Member Functions inherited from QwtSpline

QwtSpline ()
Constructor.
virtual ˜QwtSpline ()
Destructor.
void setParametrization (int type)
void setParametrization (QwtSplineParametrization *)
const QwtSplineParametrization * parametrization () const
void setBoundaryType (BoundaryType)
BoundaryType boundaryType () const
void setBoundaryValue (BoundaryPosition, double value)
Define the boundary value.
double boundaryValue (BoundaryPosition) const
void setBoundaryCondition (BoundaryPosition, int condition)
Define the condition for an endpoint of the spline.
int boundaryCondition (BoundaryPosition) const
void setBoundaryConditions (int condition, double valueBegin=0.0, double valueEnd=0.0)
Define the condition at the endpoints of a spline.

Additional Inherited Members

Public Types inherited from QwtSpline

enum BoundaryType { ConditionalBoundaries, PeriodicPolygon, ClosedPolygon }
enum BoundaryPosition { AtBeginning, AtEnd }
enum BoundaryCondition { Clamped1, Clamped2, Clamped3, LinearRunout }
Boundary condition.

Detailed Description

A spline with G1 continuity.

QwtSplinePleasing is some sort of cardinal spline, with non C1 continuous extra rules for narrow angles. It has a locality of 2.

Note

The algorithm is the one offered by a popular office package.

Definition at line 23 of file qwt_spline_pleasing.h.

Constructor & Destructor Documentation

QwtSplinePleasing::QwtSplinePleasing ()

Constructor. The default setting is a non closing spline with uniform parametrization. ( QwtSplineParametrization::ParameterUniform ).

See also

QwtSpline::setParametrization(), QwtSpline::setBoundaryType()

Definition at line 265 of file qwt_spline_pleasing.cpp.

QwtSplinePleasing::˜QwtSplinePleasing () [virtual]

Destructor.

Definition at line 271 of file qwt_spline_pleasing.cpp.

Member Function Documentation

QVector< QLineF > QwtSplinePleasing::bezierControlLines (const QPolygonF &points) const [override], [virtual]

Interpolate a curve with Bezier curves. Interpolates a polygon piecewise with cubic Bezier curves and returns the 2 control points of each curve as QLineF.

Parameters

points Control points

Returns

Control points of the interpolating Bezier curves

Implements QwtSplineInterpolating.

Definition at line 327 of file qwt_spline_pleasing.cpp.

uint QwtSplinePleasing::locality () const [override], [virtual]

Returns

2

Reimplemented from QwtSpline.

Definition at line 276 of file qwt_spline_pleasing.cpp.

QPainterPath QwtSplinePleasing::painterPath (const QPolygonF & points)const [override], [virtual]

Interpolate a curve with Bezier curves. Interpolates a polygon piecewise with cubic Bezier curves and returns them as QPainterPath.

Parameters

points Control points

Returns

QPainterPath Painter path, that can be rendered by QPainter

Reimplemented from QwtSplineInterpolating.

Definition at line 290 of file qwt_spline_pleasing.cpp.

Author

Generated automatically by Doxygen for Qwt User’s Guide from the source code.

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