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src/qwt_point_3d.h

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+/******************************************************************************
+ * Qwt Widget Library
+ * Copyright (C) 1997   Josef Wilgen
+ * Copyright (C) 2002   Uwe Rathmann
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the Qwt License, Version 1.0
+ *****************************************************************************/
+
+/*! \file */
+#ifndef QWT_POINT_3D_H
+#define QWT_POINT_3D_H
+
+#include "qwt_global.h"
+#include <qpoint.h>
+#include <qmetatype.h>
+
+/*!
+   \brief QwtPoint3D class defines a 3D point in double coordinates
+ */
+
+class QWT_EXPORT QwtPoint3D
+{
+  public:
+    QwtPoint3D();
+    QwtPoint3D( double x, double y, double 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 );
+    void setY( double y );
+    void setZ( double y );
+
+    QPointF toPoint() const;
+
+    bool operator==( const QwtPoint3D& ) const;
+    bool operator!=( const QwtPoint3D& ) const;
+
+  private:
+    double m_x;
+    double m_y;
+    double m_z;
+};
+
+Q_DECLARE_TYPEINFO( QwtPoint3D, Q_MOVABLE_TYPE );
+Q_DECLARE_METATYPE( QwtPoint3D );
+
+#ifndef QT_NO_DEBUG_STREAM
+QWT_EXPORT QDebug operator<<( QDebug, const QwtPoint3D& );
+#endif
+
+/*!
+    Constructs a null point.
+    \sa isNull()
+ */
+inline QwtPoint3D::QwtPoint3D()
+    : m_x( 0.0 )
+    , m_y( 0.0 )
+    , m_z( 0.0 )
+{
+}
+
+//! Constructs a point with coordinates specified by x, y and z.
+inline QwtPoint3D::QwtPoint3D( double x, double y, double z = 0.0 )
+    : m_x( x )
+    , m_y( y )
+    , m_z( z )
+{
+}
+
+/*!
+    Constructs a point with x and y coordinates from a 2D point,
+    and a z coordinate of 0.
+ */
+inline QwtPoint3D::QwtPoint3D( const QPointF& other )
+    : m_x( other.x() )
+    , m_y( other.y() )
+    , m_z( 0.0 )
+{
+}
+
+/*!
+    \return 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.
+ */
+inline bool QwtPoint3D::isNull() const
+{
+    return m_x == 0.0 && m_y == 0.0 && m_z == 0.0;
+}
+
+//! \return The x-coordinate of the point.
+inline double QwtPoint3D::x() const
+{
+    return m_x;
+}
+
+//! \return The y-coordinate of the point.
+inline double QwtPoint3D::y() const
+{
+    return m_y;
+}
+
+//! \return The z-coordinate of the point.
+inline double QwtPoint3D::z() const
+{
+    return m_z;
+}
+
+//! \return A reference to the x-coordinate of the point.
+inline double& QwtPoint3D::rx()
+{
+    return m_x;
+}
+
+//! \return A reference to the y-coordinate of the point.
+inline double& QwtPoint3D::ry()
+{
+    return m_y;
+}
+
+//! \return A reference to the z-coordinate of the point.
+inline double& QwtPoint3D::rz()
+{
+    return m_z;
+}
+
+//! Sets the x-coordinate of the point to the value specified by x.
+inline void QwtPoint3D::setX( double x )
+{
+    m_x = x;
+}
+
+//! Sets the y-coordinate of the point to the value specified by y.
+inline void QwtPoint3D::setY( double y )
+{
+    m_y = y;
+}
+
+//! Sets the z-coordinate of the point to the value specified by z.
+inline void QwtPoint3D::setZ( double z )
+{
+    m_z = z;
+}
+
+/*!
+   \return 2D point, where the z coordinate is dropped.
+ */
+inline QPointF QwtPoint3D::toPoint() const
+{
+    return QPointF( m_x, m_y );
+}
+
+//! \return True, if this point and other are equal; otherwise returns false.
+inline bool QwtPoint3D::operator==( const QwtPoint3D& other ) const
+{
+    return ( m_x == other.m_x ) && ( m_y == other.m_y ) && ( m_z == other.m_z );
+}
+
+//! \return True if this rect and other are different; otherwise returns false.
+inline bool QwtPoint3D::operator!=( const QwtPoint3D& other ) const
+{
+    return !operator==( other );
+}
+
+#endif