- Qt 6.9
- Qt Graphs
- C++ Classes
- QtGraphs
- QSpline3DSeries
- Qt Graphs | Commercial or GPLv3

# QSpline3DSeries Class

The QSpline3DSeries class represents a data series as a spline. More...

Header: | `#include <QSpline3DSeries>`
CMake: | `find_package(Qt6 REQUIRED COMPONENTS Graphs)` `target_link_libraries(mytarget PRIVATE Qt6::Graphs)`
qmake: | `QT += graphs`
Since: | Qt 6.9
In QML: | Spline3DSeries
Inherits: | QScatter3DSeries

- List of all members, including inherited members
- QSpline3DSeries is part of Qt Graphs C++ Classes for 3D.

## Properties

splineColor : QColor splineKnotting : qreal splineLooping : bool | splineResolution : int splineTension : qreal splineVisible : bool

## Public Functions

| QSpline3DSeries(QObject *parent = nullptr)
| QSpline3DSeries(QScatterDataProxy *dataProxy, QObject *parent = nullptr)
virtual | ~QSpline3DSeries() override
bool | isSplineLooping() const
bool | isSplineVisible() const
void | setSplineColor(QColor color)
void | setSplineKnotting(qreal knotting)
void | setSplineLooping(bool looping)
void | setSplineResolution(int resolution)
void | setSplineTension(qreal tension)
void | setSplineVisible(bool draw)
QColor | splineColor() const
qreal | splineKnotting() const
int | splineResolution() const
qreal | splineTension() const

## Signals

void | splineColorChanged(QColor color)
void | splineKnottingChanged(qreal knotting)
void | splineLoopingChanged(bool looping)
void | splineResolutionChanged(int resolution)
void | splineTensionChanged(qreal tension)
void | splineVisibilityChanged(bool visible)

## Detailed Description

Spline graphs are used to show information as a series of data points connected by a curved or straight Catmull-Rom spline.

This class manages the spline specific visual elements.

Spline3DSeries extends the Scatter3DSeries API.

## Property Documentation

### splineColor : QColor

This property holds the color of the spline.

Access functions:

QColor | splineColor() const
void | setSplineColor(QColor color)

Notifier signal:

void | splineColorChanged(QColor color)

### splineKnotting : qreal

This property holds the knot parametrization of the spline.

This parameter can change the profile of the curve. The spline is classified as a uniform Catmull-Rom spline at a value of `0.0`, a centripetal Catmull-Rom spline at a value of `0.5`, and a chordal Catmull-Rom spline at a value of `1.0`.

The value must be between `0.0` and `1.0`. The default value is `0.5`.

Access functions:

qreal | splineKnotting() const
void | setSplineKnotting(qreal knotting)

Notifier signal:

void | splineKnottingChanged(qreal knotting)

### splineLooping : bool

Determines whether the spline loops.

This adds a spline segment between the first and last points of the series connecting the spline into a loop.

The default value is `false`

Access functions:

bool | isSplineLooping() const
void | setSplineLooping(bool looping)

Notifier signal:

void | splineLoopingChanged(bool looping)

### splineResolution : int

This property holds the resolution of the segments spline.

The number of vertices per spline segment, which is defined as the part between two points.

Must be a value above `2`. The default value is `10`.

Access functions:

int | splineResolution() const
void | setSplineResolution(int resolution)

Notifier signal:

void | splineResolutionChanged(int resolution)

### splineTension : qreal

This property holds the tension of the spline.

The spline uses maximum curvature for segments at a value of `0.0` Segments are completely straight at a value of `1.0` Must be between `0.0` and `1.0` The default value is `0.0`

Access functions:

qreal | splineTension() const
void | setSplineTension(qreal tension)

Notifier signal:

void | splineTensionChanged(qreal tension)

### splineVisible : bool

Visibility of the spline.

Visibility of the spline. The default value is `true`.

Access functions:

bool | isSplineVisible() const
void | setSplineVisible(bool draw)

Notifier signal:

void | splineVisibilityChanged(bool visible)

## Member Function Documentation

### `[explicit]` QSpline3DSeries::QSpline3DSeries(QObject *parent = nullptr)

Constructs a spline 3D series with the parent parent.

### `[explicit]` QSpline3DSeries::QSpline3DSeries(QScatterDataProxy *dataProxy, QObject *parent = nullptr)

Constructs a spline 3D series with the data proxy dataProxy and the parent parent.

### `[override virtual noexcept]` QSpline3DSeries::~QSpline3DSeries()

Deletes the spline 3D series.