/***************************************************************************
** **
** QCustomPlot, an easy to use, modern plotting widget for Qt **
** Copyright (C) 2011-2021 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: 29.03.21 **
** Version: 2.1.0 **
****************************************************************************/
#include "qcustomplot.h"
/* including file 'src/vector2d.cpp' */
/* modified 2021-03-29T02:30:44, size 7973 */
////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////// 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 double QCPVector2D::angle() const
Returns the angle of the vector in radians. The angle is measured between the positive x line and
the vector, counter-clockwise in a mathematical coordinate system (y axis upwards positive). In
screen/widget coordinates where the y axis is inverted, the angle appears clockwise.
*/
/*! \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.
If the vector has both entries set to zero, this method does nothing.
\see normalized, length, lengthSquared
*/
void QCPVector2D::normalize()
{
if (mX == 0.0 && mY == 0.0) return;
const double lenInv = 1.0/length();
mX *= lenInv;
mY *= lenInv;
}
/*!
Returns a normalized version of this vector. The length of the returned vector is equal to 1.
If the vector has both entries set to zero, this method returns the vector unmodified.
\see normalize, length, lengthSquared
*/
QCPVector2D QCPVector2D::normalized() const
{
if (mX == 0.0 && mY == 0.0) return *this;
const double lenInv = 1.0/length();
return QCPVector2D(mX*lenInv, mY*lenInv);
}
/*! \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
{
const QCPVector2D v(end-start);
const double vLengthSqr = v.lengthSquared();
if (!qFuzzyIsNull(vLengthSqr))
{
const 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
解析电力系统暂态数据COMTRADE文件
需积分: 5 36 浏览量
2022-08-10
14:39:53
上传
评论 2
收藏 337KB ZIP 举报
陕西汉中郭晓还钱
- 粉丝: 1
- 资源: 8
最新资源
- Screenshot_20240427_031602.jpg
- 网页PDF_2024年04月26日 23-46-14_QQ浏览器网页保存_QQ浏览器转格式(6).docx
- 直接插入排序,冒泡排序,直接选择排序.zip
- 在排序2的基础上,再次对快排进行优化,其次增加快排非递归,归并排序,归并排序非递归版.zip
- 实现了7种排序算法.三种复杂度排序.三种nlogn复杂度排序(堆排序,归并排序,快速排序)一种线性复杂度的排序.zip
- 冒泡排序 直接选择排序 直接插入排序 随机快速排序 归并排序 堆排序.zip
- 课设-内部排序算法比较 包括冒泡排序、直接插入排序、简单选择排序、快速排序、希尔排序、归并排序和堆排序.zip
- Python排序算法.zip
- C语言实现直接插入排序、希尔排序、选择排序、冒泡排序、堆排序、快速排序、归并排序、计数排序,并带图详解.zip
- 常用工具集参考用于图像等数据处理
资源上传下载、课程学习等过程中有任何疑问或建议,欢迎提出宝贵意见哦~我们会及时处理!
点击此处反馈
评论0