# QwtPoint3D - Man Page

QwtPoint3D class defines a 3D point in double coordinates.

## Synopsis

`#include <qwt_point_3d.h>`

### Public Member Functions

QwtPoint3D ()
QwtPoint3D (double x, double y, double z)
Constructs a point with coordinates specified by x, y and z.
QwtPoint3D (const QPointF &)
bool isNull () const
double x () const
double y () const
double z () const
double & rx ()
double & ry ()
double & rz ()
void setX (double x)
Sets the x-coordinate of the point to the value specified by x.
void setY (double y)
Sets the y-coordinate of the point to the value specified by y.
void setZ (double y)
Sets the z-coordinate of the point to the value specified by z.
QPointF toPoint () const
bool operator== (const QwtPoint3D &) const
bool operator!= (const QwtPoint3D &) const

## Detailed Description

QwtPoint3D class defines a 3D point in double coordinates.

Definition at line 22 of file qwt_point_3d.h.

## Constructor & Destructor Documentation

### QwtPoint3D::QwtPoint3D () [inline]

Constructs a null point.

isNull()

Definition at line 65 of file qwt_point_3d.h.

### QwtPoint3D::QwtPoint3D (const QPointF & other) [inline]

Constructs a point with x and y coordinates from a 2D point, and a z coordinate of 0.

Definition at line 84 of file qwt_point_3d.h.

## Member Function Documentation

### bool QwtPoint3D::isNull () const [inline]

Returns

True if the point is null; otherwise returns false.

A point is considered to be null if x, y and z-coordinates are equal to zero.

Definition at line 97 of file qwt_point_3d.h.

### bool QwtPoint3D::operator!= (const QwtPoint3D & other) const [inline]

Returns

True if this rect and other are different; otherwise returns false.

Definition at line 171 of file qwt_point_3d.h.

### bool QwtPoint3D::operator== (const QwtPoint3D & other) const [inline]

Returns

True, if this point and other are equal; otherwise returns false.

Definition at line 165 of file qwt_point_3d.h.

### double & QwtPoint3D::rx () [inline]

Returns

A reference to the x-coordinate of the point.

Definition at line 121 of file qwt_point_3d.h.

### double & QwtPoint3D::ry () [inline]

Returns

A reference to the y-coordinate of the point.

Definition at line 127 of file qwt_point_3d.h.

### double & QwtPoint3D::rz () [inline]

Returns

A reference to the z-coordinate of the point.

Definition at line 133 of file qwt_point_3d.h.

### QPointF QwtPoint3D::toPoint () const [inline]

Returns

2D point, where the z coordinate is dropped.

Definition at line 159 of file qwt_point_3d.h.

### double QwtPoint3D::x () const [inline]

Returns

The x-coordinate of the point.

Definition at line 103 of file qwt_point_3d.h.

### double QwtPoint3D::y () const [inline]

Returns

The y-coordinate of the point.

Definition at line 109 of file qwt_point_3d.h.

### double QwtPoint3D::z () const [inline]

Returns

The z-coordinate of the point.

Definition at line 115 of file qwt_point_3d.h.

## Author

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

## Info

Sun Jul 18 2021 Version 6.2.0 Qwt User's Guide