QwtSplineBasis(3)

📦
version 6.3.0 · 2 versions
, in alpine 3.24

💖 NAME 💖

okay so welcome to QwtSplineBasis(3) from the Library Functions Manual, bestie 💖 — this page is all about QwtSplineBasis, aka an approximation using a basis spline. it’s giving “cute little spline class with main character energy,” and we’re gonna go through every single detail together, no cap.

✨ SYNOPSIS ✨

#include <qwt_spline_basis.h>

Inherits QwtSpline.

🫶 Public Member Functions

  • QwtSplineBasis () — Constructor. iconic beginning behavior.
  • virtual ~QwtSplineBasis () — Destructor. goodbye bestie.
  • virtual QPainterPath painterPath (const QPolygonF &) const override — the painter-path-making member, living its override life.
  • virtual uint locality () const override — The locality is always 2.

💅 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.
  • virtual QPolygonF polygon (const QPolygonF &, double tolerance) const — Interpolate a curve by a polygon.

🌈 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 🦋

QwtSplineBasis approximates a set of points by polynomials with C2 continuity ( = first and second derivatives are equal ) at the end points.

⚠️ bestie, important: the end points of the spline do not match the original points.

Definition at line 24 of file qwt_spline_basis.h.

🎀 Constructor & Destructor Documentation 🎀

QwtSplineBasis::QwtSplineBasis ()

Constructor.

Definition at line 227 of file qwt_spline_basis.cpp.

QwtSplineBasis::~QwtSplineBasis () [virtual]

Destructor.

Definition at line 232 of file qwt_spline_basis.cpp.

🔥 Member Function Documentation 🔥

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

The locality is always 2.

Reimplemented from QwtSpline.

Definition at line 237 of file qwt_spline_basis.cpp.

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

Approximates a polygon piecewise with cubic Bezier curves and returns them as QPainterPath.

Parameters

  • points — Control points

Returns

  • Painter path, that can be rendered by QPainter

Implements QwtSpline.

Definition at line 249 of file qwt_spline_basis.cpp.

💜 Author 💜

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

💖 that’s the whole page, bestie! source/version vibes: Qwt User's Guide · page: QwtSplineBasis(3) · date: the footer didn’t hand us one, so we’re not inventing it — mwah 💅✨

📦 where this page comes from