mirror of
https://github.com/qgis/QGIS.git
synced 2025-10-04 00:04:03 -04:00
33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
146 lines
3.6 KiB
C++
146 lines
3.6 KiB
C++
/******************************************************************************
|
|
* QwtPolar Widget Library
|
|
* Copyright (C) 2008 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
|
|
*****************************************************************************/
|
|
|
|
#include "qwt_point_polar.h"
|
|
#include "qwt_math.h"
|
|
|
|
#if QT_VERSION >= 0x050200
|
|
|
|
static QwtPointPolar qwtPointToPolar( const QPointF& point )
|
|
{
|
|
return QwtPointPolar( point );
|
|
}
|
|
|
|
#endif
|
|
|
|
namespace
|
|
{
|
|
static const struct RegisterQwtPointPolar
|
|
{
|
|
inline RegisterQwtPointPolar()
|
|
{
|
|
qRegisterMetaType< QwtPointPolar >();
|
|
|
|
#if QT_VERSION >= 0x050200
|
|
QMetaType::registerConverter< QPointF, QwtPointPolar >( qwtPointToPolar );
|
|
QMetaType::registerConverter< QwtPointPolar, QPointF >( &QwtPointPolar::toPoint );
|
|
#endif
|
|
}
|
|
|
|
} qwtRegisterQwtPointPolar;
|
|
}
|
|
|
|
/*!
|
|
Convert and assign values from a point in Cartesian coordinates
|
|
|
|
\param p Point in Cartesian coordinates
|
|
\sa setPoint(), toPoint()
|
|
*/
|
|
QwtPointPolar::QwtPointPolar( const QPointF& p )
|
|
{
|
|
m_radius = std::sqrt( qwtSqr( p.x() ) + qwtSqr( p.y() ) );
|
|
m_azimuth = std::atan2( p.y(), p.x() );
|
|
}
|
|
|
|
/*!
|
|
Convert and assign values from a point in Cartesian coordinates
|
|
\param p Point in Cartesian coordinates
|
|
*/
|
|
void QwtPointPolar::setPoint( const QPointF& p )
|
|
{
|
|
m_radius = std::sqrt( qwtSqr( p.x() ) + qwtSqr( p.y() ) );
|
|
m_azimuth = std::atan2( p.y(), p.x() );
|
|
}
|
|
|
|
/*!
|
|
Convert and return values in Cartesian coordinates
|
|
|
|
\return Converted point in Cartesian coordinates
|
|
|
|
\note Invalid or null points will be returned as QPointF(0.0, 0.0)
|
|
\sa isValid(), isNull()
|
|
*/
|
|
QPointF QwtPointPolar::toPoint() const
|
|
{
|
|
if ( m_radius <= 0.0 )
|
|
return QPointF( 0.0, 0.0 );
|
|
|
|
const double x = m_radius * std::cos( m_azimuth );
|
|
const double y = m_radius * std::sin( m_azimuth );
|
|
|
|
return QPointF( x, y );
|
|
}
|
|
|
|
/*!
|
|
\brief Compare 2 points
|
|
|
|
Two points are equal to each other if radius and
|
|
azimuth-coordinates are the same. Points are not equal, when
|
|
the azimuth differs, but other.azimuth() == azimuth() % (2 * PI).
|
|
|
|
\return True if the point is equal to other; otherwise return false.
|
|
|
|
\sa normalized()
|
|
*/
|
|
bool QwtPointPolar::operator==( const QwtPointPolar& other ) const
|
|
{
|
|
return m_radius == other.m_radius && m_azimuth == other.m_azimuth;
|
|
}
|
|
|
|
/*!
|
|
Compare 2 points
|
|
|
|
Two points are equal to each other if radius and
|
|
azimuth-coordinates are the same. Points are not equal, when
|
|
the azimuth differs, but other.azimuth() == azimuth() % (2 * PI).
|
|
|
|
\return True if the point is not equal to other; otherwise return false.
|
|
\sa normalized()
|
|
*/
|
|
bool QwtPointPolar::operator!=( const QwtPointPolar& other ) const
|
|
{
|
|
return m_radius != other.m_radius || m_azimuth != other.m_azimuth;
|
|
}
|
|
|
|
/*!
|
|
Normalize radius and azimuth
|
|
|
|
When the radius is < 0.0 it is set to 0.0. The azimuth is
|
|
a value >= 0.0 and < 2 * M_PI.
|
|
|
|
\return Normalized point
|
|
*/
|
|
QwtPointPolar QwtPointPolar::normalized() const
|
|
{
|
|
const double radius = qwtMaxF( m_radius, 0.0 );
|
|
|
|
double azimuth = m_azimuth;
|
|
if ( azimuth < -2.0 * M_PI || azimuth >= 2 * M_PI )
|
|
azimuth = std::fmod( m_azimuth, 2 * M_PI );
|
|
|
|
if ( azimuth < 0.0 )
|
|
azimuth += 2 * M_PI;
|
|
|
|
return QwtPointPolar( azimuth, radius );
|
|
}
|
|
|
|
#ifndef QT_NO_DEBUG_STREAM
|
|
|
|
#include <qdebug.h>
|
|
|
|
QDebug operator<<( QDebug debug, const QwtPointPolar& point )
|
|
{
|
|
debug.nospace() << "QwtPointPolar("
|
|
<< point.azimuth() << "," << point.radius() << ")";
|
|
|
|
return debug.space();
|
|
}
|
|
|
|
#endif
|
|
|