QwtSplinePleasing(3)

📦
version 6.3.0 · 2 versions
, in alpine 3.24

QwtSplinePleasing(3) 🦋✨

okay bestie, welcome to the Library Functions Manual page for QwtSplinePleasing — it's giving fancy curve energy and I'm obsessed. 💅

🌸 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 — listed as-is in the original, bestie.
  • 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 💜

some of these are just signatures in the original, so I'm leaving them exactly as-is, no invented extras:

  • 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.

okay so 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.

okay bye bestie! this page lives in the Qwt User's Guide, and the footer points back to QwtSplinePleasing(3) — the original didn't print a date, so I'm not inventing one. 💖✨

📦 where this page comes from