io/viewers/viewer3D-10-interaction.cpp

Simple selection of a surfel (with shift + left click) with the Polyscope Viewer proposed by DGtal. You may associates names (i.e. integers) to surfels or to group of surfels. You may associate reactions or callback functions to named graphical objects (surfels in DGtal 0.9).

* $ ./examples/io/viewers/viewer3D-10-interaction
* 

Example of PolyscopeViewer interaction with the selection of surfels.

 
#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 Z3i;
 
typedef PolyscopeViewer<Space,KSpace> MyViewer;
typedef MyViewer::Callback Callback;
typedef KSpace::SCell SCell;
 
// Standard services - public :
//
struct MyCallback : public Callback {
  void OnClick(
      const std::string& name, size_t index, 
      const DisplayData<MyViewer::RealPoint>& data, 
      void* polyscopeStructure
  ) {
    ((void) index); ((void) data); ((void) polyscopeStructure);
    std::cout << "Item name: " << name << std::endl;
  }
};
 
int main()
{
  Point p1( 0, 0, 0 );
  Point p2( 5, 5 ,5 );
  Point p3( 2, 3, 4 );
 
  KSpace K;
  K.init( p1, p2, true );
 
  Point v1 = Z3i::Point(10, 10,10);
  Point v2 = Z3i::Point(9, 9, 9);
  Point v3 = Z3i::Point(11, 11,11);
  
  MyViewer viewer( K );
  viewer.setCallback(new MyCallback);
  Z3i::SCell surfel1 = K.sCell( Point( 1, 1, 2 ), KSpace::POS );
  Z3i::SCell surfel2 = K.sCell( Point( 3, 3, 4 ), KSpace::NEG );
  Z3i::SCell surfel3 = K.sCell( Point( 5, 6, 5 ), KSpace::POS );
 
  viewer.draw(surfel1, "Surfel 1");
  viewer.draw(surfel2, "Surfel 2");
  viewer << Point(0, 0, 1) << Point(1, 1, 2);
 
  viewer.show();
  return 0;
}
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