topology/ctopo-1-3d.cpp

A simple example of cellular grid space with several cells instantiated and visualized in 3D. This program outputs this image.

See also

Cells may be unsigned or signed

 
#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/helpers/StdDefs.h"
 
#include "DGtal/io/DrawWithDisplay3DModifier.h"
#include "DGtal/io/viewers/Viewer3D.h"
 
 
using namespace std;
using namespace DGtal;
using namespace DGtal::Z3i;
 
 
int main( int argc, char** argv )
{
  // for 3D display with Viewer3D
  QApplication application(argc,argv);
 
  KSpace K;
  Point plow(0,0,0);
  Point pup(3,3,2);
  Domain domain( plow, pup );
  K.init( plow, pup, true );
  //
  typedef Viewer3D<Space, KSpace> MyViewer;
  MyViewer viewer(K);
  viewer.show();
  viewer << SetMode3D( domain.className(), "Paving" );
 
  Cell ptlow = K.uPointel( plow ); // pointel (0*2,0*2, 0*2)
  Cell ptup1 = K.uPointel( pup ); // pointel (3*2,3*2, 2*2)
  Cell ptup2 = K.uTranslation( ptup1, Point::diagonal() ); // pointel (4*2, 4*2, 3*2)
 
  viewer << ptlow << ptup1 << ptup2;
 
  // drawing cells of dimension 0
  Cell p1= K.uCell(Point(0,0,2));  // pointel (0*2,0*2,2*2)
  Cell p2= K.uCell(Point(0,2,2));  // ...
  Cell p3= K.uCell(Point(2,2,2));
  Cell p4= K.uCell(Point(2,0,2));
  Cell p5= K.uCell(Point(0,0,4));
  Cell p6= K.uCell(Point(0,2,4));
  Cell p7= K.uCell(Point(2,2,4));
  Cell p8= K.uCell(Point(2,0,4));
  viewer << p1 << p2 << p3 << p4 << p5 << p6 << p7 << p8;
 
  // drawing Cells of dimension 1
  Cell linel0 = K.uCell( Point( 1, 0, 2 ) ); // linel (2*1+1, 0, 2*2)
  Cell linel1 = K.uCell( Point( 1, 2, 2 ) ); // ...
  Cell linel2 = K.uCell( Point( 0, 1, 2 ) );
  Cell linel3 = K.uCell( Point( 2, 1, 2 ) );
 
  Cell linel4 = K.uCell( Point( 1, 0, 4 ) );
  Cell linel5 = K.uCell( Point( 1, 2, 4 ) );
  Cell linel6 = K.uCell( Point( 0, 1, 4 ) );
  Cell linel7 = K.uCell( Point( 2, 1, 4 ) );
 
  Cell linel8 = K.uCell( Point( 0, 0, 3 ) );
  Cell linel9 = K.uCell( Point( 0, 2, 3 ) );
  Cell linel10 = K.uCell( Point( 2, 0, 3 ) );
  Cell linel11 = K.uCell( Point( 2, 2, 3 ) );
 
 
  Cell linel12 = K.uCell( Point( 3, 2, 2 ) );
 
  viewer << linel0<< linel1<< linel2 << linel3 ;
  viewer << linel4<< linel5<< linel6 << linel7 ;
  viewer << linel8<< linel9<< linel10 << linel11 << linel12;
 
  // drawing cells of dimension 2
 
  Cell surfelA = K.uCell( Point( 2, 1, 3 ) ); // surfel (2*2,2*1+1,2*3+1)
  Cell surfelB = K.uCell( Point( 1, 0, 1 ) ); // surfel (2*1,2*0,2*1+1)
  Cell surfelC = K.uCell( Point( 2, 1, 1 ) ); // surfel (2*2,2*1+1,2*1+1)
  viewer << surfelA << surfelB << surfelC;
 
  // drawing cells of dimension 3
  Cell vox1 = K.uCell( Point( 3, 3, 3 ) ); // voxel (2*3+1,2*3+1,2*3+1)
  Cell vox2 = K.uCell( Point( 1, 1, 3 ) ); // voxel (2*1+1,2*1+1,2*3+1)
  viewer << vox1 << vox2;
 
  viewer<< MyViewer::updateDisplay;
  return application.exec();
 
}