topology/ctopo-1s-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/viewers/PolyscopeViewer.h"

 
using namespace std;
using namespace DGtal;
using namespace DGtal::Z3i;

 
int main( int argc, char** argv )
{
  // for 3D display with PolyscopeViewer
  KSpace K;
  Point plow(0,0,0);
  Point pup(3,3,2);
  Domain domain( plow, pup );
  K.init( plow, pup, true );
 
  typedef PolyscopeViewer<Space, KSpace> MyViewer;
  MyViewer viewer(K);
 
  SCell ptlow = K.sPointel( plow ); // pointel (0*2,0*2, 0*2)
  SCell ptup1 = K.sPointel( pup );  // pointel (3*2,3*2, 2*2)
  SCell ptup2 = K.sTranslation( ptup1, Point::diagonal() ); // pointel (4*2, 4*2, 3*2)
 
  viewer << ptlow << ptup1 << ptup2;
 
  // drawing cells of dimension 0
  SCell p1= K.sCell(Point(0,0,2),false);  // pointel (0*2,0*2,2*2)
  SCell p2= K.sCell(Point(0,2,2));  // ...
  SCell p3= K.sCell(Point(2,2,2),false);
  SCell p4= K.sCell(Point(2,0,2));
  SCell p5= K.sCell(Point(0,0,4),false);
  SCell p6= K.sCell(Point(0,2,4));
  SCell p7= K.sCell(Point(2,2,4), false);
  SCell p8= K.sCell(Point(2,0,4));
  viewer << p1 << p2 << p3 << p4 << p5 << p6 << p7 << p8;
 
  // drawing Cells of dimension 1
  SCell linel0 = K.sCell( Point( 1, 0, 2 ) );  // linel (2*1+1, 0, 2*2)
  SCell linel1 = K.sCell( Point( 1, 2, 2 ) );  // ...
  SCell linel2 = K.sCell( Point( 0, 1, 2 ) );
  SCell linel3 = K.sCell( Point( 2, 1, 2 ) );
 
  SCell linel4 = K.sCell( Point( 1, 0, 4 ) );
  SCell linel5 = K.sCell( Point( 1, 2, 4 ) );
  SCell linel6 = K.sCell( Point( 0, 1, 4 ) );
  SCell linel7 = K.sCell( Point( 2, 1, 4 ) );
 
  SCell linel8 = K.sCell( Point( 0, 0, 3 ) );
  SCell linel9 = K.sCell( Point( 0, 2, 3 ) );
  SCell linel10 = K.sCell( Point( 2, 0, 3 ) );
  SCell linel11 = K.sCell( Point( 2, 2, 3 ) );
 
 
  SCell linel12 = K.sCell( 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
 
  SCell surfelA = K.sCell( Point( 2, 1, 3 ) ); // surfel (2*2,2*1+1,2*3+1)
  SCell surfelB = K.sCell( Point( 1, 0, 1 ) ); // surfel (2*1,2*0,2*1+1)
  SCell surfelC = K.sCell( Point( 2, 1, 1 ),false ); // surfel (2*2,2*1+1,2*1+1)
  viewer << surfelA << surfelB << surfelC;
 
  // drawing cells of dimension 3
  SCell vox1 = K.sCell( Point( 3, 3, 3 ) ); // voxel (2*3+1,2*3+1,2*3+1)
  SCell vox2 = K.sCell( Point( 1, 1, 3 ) ,false ); // voxel (2*1+1,2*1+1,2*3+1)
  viewer << vox1 << vox2;
 
  viewer.show();
  return 0;
}