Abstract base class for parametric surfaces 更多...

#include <qwt3d_parametricsurface.h>

类 Qwt3DParametricSurface 继承关系图:

类
class	PrivateData

Public 成员函数
virtual Triple	operator() (double u, double v)=0

virtual Qwt3DParametricData	create ()
	Evaluates the parametric surface over the mesh grid and returns the result

void	setPeriodic (bool u, bool v)

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 parametric surfaces

A Qwt3DParametricSurface encapsulates a parametric surface defined by operator()(u, v). The user overrides operator() to produce a working object. setDomain, setMesh and create should be called for reasonable operating conditions.

create() returns a Qwt3DParametricData struct that the caller feeds to Qwt3DSurface::loadFromData(). The class no longer holds a back-pointer to the surface item (deferred smell #2, resolved).

class Torus : public Qwt3DParametricSurface
{
public:
    Triple operator()(double u, double v) override { ... }
};
 
Torus torus;
torus.setMesh(40, 40);
torus.setDomain(0, 2*PI, 0, 2*PI);
torus.setPeriodic(true, true);
auto data = torus.create();
surface->loadFromData(data);

成员函数说明

◆ create()

Qwt3DParametricData Qwt3DParametricSurface::create ( )

virtual

Evaluates the parametric surface over the mesh grid and returns the result

返回: Qwt3DParametricData containing the xyz triple matrix and periodicity flags

Allocates a triple matrix, evaluates operator()(u, v) over the mesh grid, clips values to the range bounds, 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.

该类的文档由以下文件生成:

/home/runner/work/QWT/QWT/src/plot3d/qwt3d_parametricsurface.h
/home/runner/work/QWT/QWT/src/plot3d/qwt3d_parametricsurface.cpp

类

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()