QwtVectorFieldSample类 参考

Sample used in vector fields 更多...

#include <qwt_samples.h>

Public 成员函数
	QwtVectorFieldSample (double x=0.0, double y=0.0, double vx=0.0, double vy=0.0)
	Constructor with position and vector coordinates
	QwtVectorFieldSample (const QPointF &pos, double vx=0.0, double vy=0.0)
	Constructor with QPointF position and vector coordinates
QPointF	pos () const
	Return position as QPointF
bool	isNull () const
	Check if the vector is null

Public 属性
double	x
	x coordinate of the position
double	y
	y coordinate of the position
double	vx
	x coordinate of the vector
double	vy
	y coordinate of the vector

详细描述

Sample used in vector fields

A vector field sample is a position and a vector - usually representing some direction and magnitude - attached to this position.

参见

QwtVectorFieldData

构造及析构函数说明

QwtVectorFieldSample() [1/2]

QwtVectorFieldSample::QwtVectorFieldSample ( double  posX = 0.0, double  posY = 0.0, double  vectorX = 0.0, double  vectorY = 0.0  )

inline

Constructor with position and vector coordinates

参数

posX	x coordinate of the position
posY	y coordinate of the position
vectorX	x coordinate of the vector
vectorY	y coordinate of the vector

QwtVectorFieldSample() [2/2]

QwtVectorFieldSample::QwtVectorFieldSample ( const QPointF &  pos, double  vectorX = 0.0, double  vectorY = 0.0  )

inline

Constructor with QPointF position and vector coordinates

参数

pos	Position as QPointF
vectorX	x coordinate of the vector
vectorY	y coordinate of the vector

成员函数说明

isNull()

bool QwtVectorFieldSample::isNull ( ) const

inline

Check if the vector is null

返回

true, if vx and vy are 0

pos()

QPointF QwtVectorFieldSample::pos ( ) const

inline

Return position as QPointF

返回

x/y coordinates as QPointF

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该类的文档由以下文件生成:

• /home/runner/work/QWT/QWT/src/core/qwt_samples.h