QwtSplineCurveFitter(3)

💖 QwtSplineCurveFitter(3) 💖

ok so first things first, bestie: this is a page from the Library Functions Manual for the Qwt User's Guide, and today's main character is QwtSplineCurveFitter 🎀 pull up a chair, this is gonna be good.

✨ NAME ✨

QwtSplineCurveFitter — a curve fitter that uses a spline interpolation. that's it, that's the whole vibe 💅

🌸 SYNOPSIS 🌸

#include <qwt_spline_curve_fitter.h>

it inherits QwtCurveFitter — so it's got the whole family tree going on 👑

🦋 Public Member Functions 🦋

• QwtSplineCurveFitter () — constructor ✨
• virtual ~QwtSplineCurveFitter () — destructor, virtual, so it cleans up properly 🧹
• void setSpline (QwtSpline *) — hand it a spline, it's yours now
• const QwtSpline * spline () const — the const flavor of getting your spline back
• QwtSpline * spline () — the non-const flavor, same deal
• virtual QPolygonF fitCurve (const QPolygonF &) const override — the actual curve-fitting one 💫
• virtual QPainterPath fitCurvePath (const QPolygonF &) const override — same but returns a painter path

🫶 Public Member Functions inherited from QwtCurveFitter 🫶

• virtual ~QwtCurveFitter () — destructor, again, because inheritance said so
• Mode mode () const — tells you which mode it's in

💜 Additional Inherited Members 💜

🧚 Public Types inherited from QwtCurveFitter 🧚

• enum Mode { Polygon, Path } — the preferred mode of the fitting algorithm. two options, pick your fighter ⭐

🍓 Protected Member Functions inherited from QwtCurveFitter 🍓

• QwtCurveFitter (Mode mode) — protected constructor that takes the mode

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🌈 Detailed Description 🌈

a curve fitter that uses a spline interpolation. iconic behavior, honestly.

the default setting for the spline is a cardinal spline with uniform parametrization — that's what you get out of the box, no notes 🔥

See also: QwtSpline, QwtSplineLocal — go look at these too, they're the supporting cast 👑

Definition at line 25 of file qwt_spline_curve_fitter.h.

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🎀 Constructor & Destructor Documentation 🎀

💖 QwtSplineCurveFitter::QwtSplineCurveFitter () 💖

constructor. makes a whole new fitter, slay.

Definition at line 18 of file qwt_spline_curve_fitter.cpp.

💖 QwtSplineCurveFitter::~QwtSplineCurveFitter () [virtual] 💖

destructor. it's virtual, it's doing its job, it says goodbye properly.

Definition at line 26 of file qwt_spline_curve_fitter.cpp.

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⭐ Member Function Documentation ⭐

🦋 QPolygonF QwtSplineCurveFitter::fitCurve (const QPolygonF & points) const 🦋

[override], [virtual] — both tags, bc it's that girl 💅

find a curve which has the best fit to a series of data points. literally its whole purpose in life.

Parameters

• points — series of data points

Returns

• fitted curve ✨

See also: fitCurvePath()

Implements QwtCurveFitter.

Definition at line 75 of file qwt_spline_curve_fitter.cpp.

🦋 QPainterPath QwtSplineCurveFitter::fitCurvePath (const QPolygonF & points) const 🦋

[override], [virtual] — same energy, different return type.

find a curve path which has the best fit to a series of data points. yes it's basically the twin of the one above, they're matching 🫶

Parameters

• points — series of data points

Returns

• fitted curve ✨

See also: fitCurve()

Implements QwtCurveFitter.

Definition at line 94 of file qwt_spline_curve_fitter.cpp.

🌸 void QwtSplineCurveFitter::setSpline (QwtSpline * spline) 🌸

assign a spline. give the fitter a spline to work with.

⚠️ okay important one, bestie: the spline needs to be allocated by new and will be deleted in the destructor of the fitter. so don't go deleting it yourself afterwards or you'll have a bad time 😭 the fitter owns it now, it's a whole adoption situation.

Parameters

• spline — spline

See also: spline()

Definition at line 40 of file qwt_spline_curve_fitter.cpp.

🌸 QwtSpline * QwtSplineCurveFitter::spline () 🌸

Returns

• spline

See also: setSpline()

Definition at line 62 of file qwt_spline_curve_fitter.cpp.

🌸 const QwtSpline * QwtSplineCurveFitter::spline () const 🌸

Returns

• spline

See also: setSpline()

Definition at line 53 of file qwt_spline_curve_fitter.cpp.

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👑 Author 👑

generated automatically by Doxygen for the Qwt User's Guide, from the source code. no human author listed, the robots did this one 🤖✨

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and that's the whole page, bestie, you ate that 🍓 fr fr, no cap. this iconic little number came to you from the Qwt User's Guide — version/source info and all — so go forth and fit some curves 💜🦋🎀