/***************************************************************************
** **
** QCustomPlot, an easy to use, modern plotting widget for Qt **
** Copyright (C) 2011-2018 Emanuel Eichhammer **
** **
** This program is free software: you can redistribute it and/or modify **
** it under the terms of the GNU General Public License as published by **
** the Free Software Foundation, either version 3 of the License, or **
** (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, **
** but WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program. If not, see http://www.gnu.org/licenses/. **
** **
****************************************************************************
** Author: Emanuel Eichhammer **
** Website/Contact: http://www.qcustomplot.com/ **
** Date: 25.06.18 **
** Version: 2.0.1 **
****************************************************************************/
#include "qcustomplot.h"
/* including file 'src/vector2d.cpp', size 7340 */
/* commit ce344b3f96a62e5f652585e55f1ae7c7883cd45b 2018-06-25 01:03:39 +0200 */
////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// QCPVector2D
////////////////////////////////////////////////////////////////////////////////////////////////////
/*! \class QCPVector2D
\brief Represents two doubles as a mathematical 2D vector
This class acts as a replacement for QVector2D with the advantage of double precision instead of
single, and some convenience methods tailored for the QCustomPlot library.
*/
/* start documentation of inline functions */
/*! \fn void QCPVector2D::setX(double x)
Sets the x coordinate of this vector to \a x.
\see setY
*/
/*! \fn void QCPVector2D::setY(double y)
Sets the y coordinate of this vector to \a y.
\see setX
*/
/*! \fn double QCPVector2D::length() const
Returns the length of this vector.
\see lengthSquared
*/
/*! \fn double QCPVector2D::lengthSquared() const
Returns the squared length of this vector. In some situations, e.g. when just trying to find the
shortest vector of a group, this is faster than calculating \ref length, because it avoids
calculation of a square root.
\see length
*/
/*! \fn QPoint QCPVector2D::toPoint() const
Returns a QPoint which has the x and y coordinates of this vector, truncating any floating point
information.
\see toPointF
*/
/*! \fn QPointF QCPVector2D::toPointF() const
Returns a QPointF which has the x and y coordinates of this vector.
\see toPoint
*/
/*! \fn bool QCPVector2D::isNull() const
Returns whether this vector is null. A vector is null if \c qIsNull returns true for both x and y
coordinates, i.e. if both are binary equal to 0.
*/
/*! \fn QCPVector2D QCPVector2D::perpendicular() const
Returns a vector perpendicular to this vector, with the same length.
*/
/*! \fn double QCPVector2D::dot() const
Returns the dot/scalar product of this vector with the specified vector \a vec.
*/
/* end documentation of inline functions */
/*!
Creates a QCPVector2D object and initializes the x and y coordinates to 0.
*/
QCPVector2D::QCPVector2D() :
mX(0),
mY(0)
{
}
/*!
Creates a QCPVector2D object and initializes the \a x and \a y coordinates with the specified
values.
*/
QCPVector2D::QCPVector2D(double x, double y) :
mX(x),
mY(y)
{
}
/*!
Creates a QCPVector2D object and initializes the x and y coordinates respective coordinates of
the specified \a point.
*/
QCPVector2D::QCPVector2D(const QPoint &point) :
mX(point.x()),
mY(point.y())
{
}
/*!
Creates a QCPVector2D object and initializes the x and y coordinates respective coordinates of
the specified \a point.
*/
QCPVector2D::QCPVector2D(const QPointF &point) :
mX(point.x()),
mY(point.y())
{
}
/*!
Normalizes this vector. After this operation, the length of the vector is equal to 1.
\see normalized, length, lengthSquared
*/
void QCPVector2D::normalize()
{
double len = length();
mX /= len;
mY /= len;
}
/*!
Returns a normalized version of this vector. The length of the returned vector is equal to 1.
\see normalize, length, lengthSquared
*/
QCPVector2D QCPVector2D::normalized() const
{
QCPVector2D result(mX, mY);
result.normalize();
return result;
}
/*! \overload
Returns the squared shortest distance of this vector (interpreted as a point) to the finite line
segment given by \a start and \a end.
\see distanceToStraightLine
*/
double QCPVector2D::distanceSquaredToLine(const QCPVector2D &start, const QCPVector2D &end) const
{
QCPVector2D v(end-start);
double vLengthSqr = v.lengthSquared();
if (!qFuzzyIsNull(vLengthSqr))
{
double mu = v.dot(*this-start)/vLengthSqr;
if (mu < 0)
return (*this-start).lengthSquared();
else if (mu > 1)
return (*this-end).lengthSquared();
else
return ((start + mu*v)-*this).lengthSquared();
} else
return (*this-start).lengthSquared();
}
/*! \overload
Returns the squared shortest distance of this vector (interpreted as a point) to the finite line
segment given by \a line.
\see distanceToStraightLine
*/
double QCPVector2D::distanceSquaredToLine(const QLineF &line) const
{
return distanceSquaredToLine(QCPVector2D(line.p1()), QCPVector2D(line.p2()));
}
/*!
Returns the shortest distance of this vector (interpreted as a point) to the infinite straight
line given by a \a base point and a \a direction vector.
\see distanceSquaredToLine
*/
double QCPVector2D::distanceToStraightLine(const QCPVector2D &base, const QCPVector2D &direction) const
{
return qAbs((*this-base).dot(direction.perpendicular()))/direction.length();
}
/*!
Scales this vector by the given \a factor, i.e. the x and y components are multiplied by \a
factor.
*/
QCPVector2D &QCPVector2D::operator*=(double factor)
{
mX *= factor;
mY *= factor;
return *this;
}
/*!
Scales this vector by the given \a divisor, i.e. the x and y components are divided by \a
divisor.
*/
QCPVector2D &QCPVector2D::operator/=(double divisor)
{
mX /= divisor;
mY /= divisor;
return *this;
}
/*!
Adds the given \a vector to this vector component-wise.
*/
QCPVector2D &QCPVector2D::operator+=(const QCPVector2D &vector)
{
mX += vector.mX;
mY += vector.mY;
return *this;
}
/*!
subtracts the given \a vector from this vector component-wise.
*/
QCPVector2D &QCPVector2D::operator-=(const QCPVector2D &vector)
{
mX -= vector.mX;
mY -= vector.mY;
return *this;
}
/* end of 'src/vector2d.cpp' */
/* including file 'src/painter.cpp', size 8670 */
/* commit ce344b3f96a62e5f652585e55f1ae7c7883cd45b 2018-06-25 01:03:39 +0200 */
////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// QCPPainter
////////////////////////////////////////////////////////////////////////////////////////////////////
/*! \class QCPPainter
\brief QPainter subclass used internally
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