Abstract base class for mathematical functions 更多...

#include <qwt3d_function.h>

类 Qwt3DFunction 继承关系图:

Public 成员函数
	Qwt3DFunction ()
	Default constructor

virtual double	operator() (double x, double y)=0

void	setMinZ (double val)
	Sets minimum z value for the function

void	setMaxZ (double val)
	Sets maximum z value for the function

virtual Qwt3DFunctionData	create ()
	Evaluates the function over the mesh grid and returns the result

Public 成员函数继承自 Qwt3DGridMapping
	Qwt3DGridMapping ()
	Default constructor

void	setMesh (unsigned int columns, unsigned int rows)

void	setDomain (double minu, double maxu, double minv, double maxv)
	Sets the domain (parameter range) for the u and v directions

void	restrictRange (ParallelEpiped const &)
	Restricts the data range to a parallelepiped

Public 成员函数继承自 Qwt3DMapping
virtual QString	name () const

额外继承的成员函数
Protected 成员函数继承自 Qwt3DGridMapping
ParallelEpiped &	range ()

const ParallelEpiped &	range () const

unsigned int	meshU () const

unsigned int	meshV () const

double	minU () const

double	maxU () const

double	minV () const

double	maxV () const

详细描述

Abstract base class for mathematical functions

A Qwt3DFunction encapsulates a mathematical function with rectangular domain. The user has to adapt the pure virtual operator() to get a working object. Also, the client code should call setDomain, setMesh and create for reasonable operating conditions.

create() returns a Qwt3DFunctionData struct that the caller feeds to Qwt3DSurface::loadFromData(). The function no longer holds a back-pointer to the surface item (deferred smell #2, resolved).

class MyFunction : public Qwt3DFunction
{
public:
    double operator()(double x, double y) override { return std::sin(x + y); }
};
 
MyFunction func;
func.setMesh(50, 50);
func.setDomain(-3, 3, -3, 3);
auto data = func.create();
surface->loadFromData(data);

成员函数说明

◆ create()

Qwt3DFunctionData Qwt3DFunction::create ( )

virtual

Evaluates the function over the mesh grid and returns the result

返回: Qwt3DFunctionData containing the z-value matrix and domain bounds

Allocates a z-value matrix, evaluates operator() over the mesh grid, clips values to the min/max z range, and returns the result. The caller is responsible for feeding this to Qwt3DSurface::loadFromData(). Returns an empty result (columns=0) if the mesh is too small.

◆ setMaxZ()

void Qwt3DFunction::setMaxZ ( double val )

Sets maximum z value for the function

参数

val	Maximum z value

◆ setMinZ()

void Qwt3DFunction::setMinZ ( double val )

Sets minimum z value for the function

参数

val	Minimum z value

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot3d/qwt3d_function.h
/home/runner/work/QWT/QWT/src/plot3d/qwt3d_function.cpp

Public 成员函数

额外继承的成员函数

详细描述

成员函数说明

◆ create()

◆ setMaxZ()

◆ setMinZ()