Abstract base class for parametric surfaces. More...

#include <qwt3d_parametricsurface.h>

Inheritance diagram for Qwt3DParametricSurface:

Classes
class	PrivateData

Public Member Functions
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 Member Functions inherited from 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 Member Functions inherited from Qwt3DMapping
virtual QString	name () const

Additional Inherited Members
Protected Member Functions inherited from 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

Detailed Description

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);

Member Function Documentation

◆ create()

Qwt3DParametricData Qwt3DParametricSurface::create ( )

virtual

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

Returns: 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.

The documentation for this class was generated from the following files:

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

Classes

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ create()