The way of VTK learning--painting my Little apple

The dataset consists primarily of the point set data that describes the geometry of the dataset and the cells that make up the dataset, so the main task of building the dataset is to identify the point set and the building Unit, the sample program builds an Apple entity, and then it paints Apple, and the sample program executes the following steps:
1, first determine the outer contour of the Apple control points, the formation of point set.
2, build a line unit.
3, build the polygon data, connect the points set together to draw a line.
4, using the pressing filter to rotate the contour line, forming an apple surface entity.
5. Drawing Apples

The code for the sample program is as follows:

#include "stdafx.h" #include <vtkPoints.h> #include <vtkSmartPointer.h> #include <vtkcellarray.h># Include <vtkPolyData.h> #include <vtkPolyDataMapper.h> #include <vtkrotationalextrusionfilter.h># Include <vtkActor.h> #include <vtkProperty.h> #include <vtkRenderer.h> #include <    vtkrenderwindow.h> #include <vtkrenderwindowinteractor.h>int _tmain (int argc, _tchar* argv[]) {//define the point coordinates of the Apple contour line    Vtksmartpointer<vtkpoints>ppoints=vtkpoints::new ();    Ppoints->insertpoint (0,0.0,0.0,1.5);    Ppoints->insertpoint (1,1.0,0.0,1);    Ppoints->insertpoint (2,2.0,0.0,1.5);    Ppoints->insertpoint (3,3.0,0.0,2.5);    Ppoints->insertpoint (4,3.5,0.0,3.0);    Ppoints->insertpoint (5,4.0,0.0,5.0);    Ppoints->insertpoint (6,3.5,0.0,6.0);    Ppoints->insertpoint (7,2.0,0.0,7.0);    Ppoints->insertpoint (8,1.0,0.0,6.0);    Ppoints->insertpoint (9,0.0,0.0,5.0); Building line units, drawing contour lines vtksmartpointer<vtkcellarray>plinecell=Vtkcellarray::new ();    Construct a unit consisting of 10 points plinecell->insertnextcell (10);    Index number of the constituent cell point set plinecell->insertcellpoint (0);    Plinecell->insertcellpoint (1);    Plinecell->insertcellpoint (2);    Plinecell->insertcellpoint (3);    Plinecell->insertcellpoint (4);    Plinecell->insertcellpoint (5);    Plinecell->insertcellpoint (6);    Plinecell->insertcellpoint (7);    Plinecell->insertcellpoint (8);    Plinecell->insertcellpoint (9);    Defines a polygon dataset vtksmartpointer<vtkpolydata>ppolydata=vtkpolydata::new ();    Sets the geometry data ppolydata->setpoints (ppoints) that make up the polygon;    Set the cell type, line unit ppolydata->setlines (Plinecell); Suppress contour lines to form Apple solid Vtksmartpointer<vtkrotationalextrusionfilter>pextrufilter=vtkrotationalextrusionfilter::    New ();    Pextrufilter->setinput (Ppolydata);    Setting the smoothness parameter of the apple surface, the surface of Apple is composed of pextrufilter->setresolution (10).   Map data to the graphics system for plotting vtksmartpointer<vtkpolydatamapper>pmap=vtkpolydatamapper::new (); Pmap->setinpUT (Pextrufilter->getoutput ());   Vtksmartpointer<vtkactor>pactor=vtkactor::new ();   Pactor->setmapper (PMAP);    Pactor->getproperty ()->setcolor (0.0,1.0,0.0);   Draw Vtksmartpointer<vtkrenderer>pren=vtkrenderer::new ();   Pren->addactor (Pactor);   Create a drawing form vtksmartpointer<vtkrenderwindow>prenwin=vtkrenderwindow::new ();   Prenwin->addrenderer (PRen);   Create the vtksmartpointer<vtkrenderwindowinteractor>piren=vtkrenderwindowinteractor::new ();    Piren->setrenderwindow (Prenwin);   Set Background color pren->setbackground (1,1,1);   Set window size prenwin->setsize (300,300);   Prenwin->render ();   Pren->resetcamera ();   Start Drawing piren->initialize ();   Piren->start (); return 0;}

Several angles of the results

The way of VTK learning--painting my Little apple