#include <iostream>
#include <string>
#include <DGtal/base/Common.h>
#include <DGtal/helpers/StdDefs.h>
#include <DGtal/helpers/Shortcuts.h>
#include <DGtal/helpers/ShortcutsGeometry.h>
#include <DGtal/shapes/SurfaceMesh.h>
#include <DGtal/geometry/surfaces/DigitalSurfaceRegularization.h>
#include <DGtal/dec/PolygonalCalculus.h>
#include <DGtal/dec/GeodesicsInHeat.h>
#include <polyscope/polyscope.h>
#include <polyscope/surface_mesh.h>
#include <polyscope/point_cloud.h>
#include "ConfigExamples.h"
#include <Eigen/Dense>
#include <Eigen/Sparse>

Include dependency graph for dgtalCalculus-geodesic.cpp:

Typedefs
typedef Shortcuts< Z3i::KSpace >	SH3
typedef ShortcutsGeometry< Z3i::KSpace >	SHG3
typedef PolygonalCalculus< SH3::RealPoint, SH3::RealVector >	PolyCalculus

Functions
void	precompute ()
void	addSource ()
void	clearSources ()
void	computeGeodesics ()
void	myCallback ()
int	main ()

Variables
polyscope::SurfaceMesh *	psMesh
polyscope::SurfaceMesh *	psMeshReg
SurfMesh	surfmesh
SurfMesh	surfmeshReg
float	dt = 2.0
CountedPtr< SH3::BinaryImage >	binary_image
CountedPtr< SH3::DigitalSurface >	surface
GeodesicsInHeat< PolyCalculus > *	heat
PolyCalculus *	calculus
GeodesicsInHeat< PolyCalculus > *	heatReg
PolyCalculus *	calculusReg
SHG3::RealVectors	iinormals
int	sourceVertexId =0
float	radiusII = 3.0
bool	skipReg = true
bool	useProjectedCalculus = true
bool	isPrecomputed =false

Detailed Description

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Author: David Coeurjolly (david.nosp@m..coe.nosp@m.urjol.nosp@m.ly@l.nosp@m.iris..nosp@m.cnrs.nosp@m..fr ) Laboratoire d'InfoRmatique en Image et Systemes d'information - LIRIS (CNRS, UMR 5205), CNRS, France

Date: 2021/09/02

This file is part of the DGtal library.

Definition in file dgtalCalculus-geodesic.cpp.

Typedef Documentation

◆ PolyCalculus

typedef PolygonalCalculus<SH3::RealPoint,SH3::RealVector> PolyCalculus

Definition at line 57 of file dgtalCalculus-geodesic.cpp.

◆ SH3

typedef Shortcuts<Z3i::KSpace> SH3

Definition at line 51 of file dgtalCalculus-geodesic.cpp.

◆ SHG3

typedef ShortcutsGeometry<Z3i::KSpace> SHG3

Definition at line 52 of file dgtalCalculus-geodesic.cpp.

Function Documentation

◆ addSource()

void addSource ( )

Definition at line 119 of file dgtalCalculus-geodesic.cpp.

{
  auto pos =rand() % surfmesh.nbVertices();
  heat->addSource( pos );
  GeodesicsInHeat<PolyCalculus>::Vector source = heat->source();
  psMesh->addVertexScalarQuantity("Sources", source);
 
  if (!skipReg)
  {
    heatReg->addSource( pos );
    GeodesicsInHeat<PolyCalculus>::Vector source = heatReg->source();
    psMeshReg->addVertexScalarQuantity("Sources", source);
  }
}

References heat, heatReg, psMesh, psMeshReg, skipReg, and surfmesh.

Referenced by myCallback().

◆ clearSources()

void clearSources ( )

Definition at line 134 of file dgtalCalculus-geodesic.cpp.

135{

136 heat->clearSource();

137 psMesh->addVertexScalarQuantity("source", heat->source());

138}

References heat, and psMesh.

Referenced by myCallback().

◆ computeGeodesics()

void computeGeodesics ( )

Definition at line 140 of file dgtalCalculus-geodesic.cpp.

{
  heat->addSource( sourceVertexId ); //Forcing one seed (for screenshots)
  GeodesicsInHeat<PolyCalculus>::Vector source = heat->source();
  psMesh->addVertexScalarQuantity("Sources", source);
  GeodesicsInHeat<PolyCalculus>::Vector dist = heat->compute();
  psMesh->addVertexDistanceQuantity("geodesic", dist);
 
  if (!skipReg)
  {
    heatReg->addSource( sourceVertexId ); //Forcing one seed (for screenshots)371672
    GeodesicsInHeat<PolyCalculus>::Vector sourceReg = heatReg->source();
    psMeshReg->addVertexScalarQuantity("Sources", sourceReg);
    GeodesicsInHeat<PolyCalculus>::Vector dist = heatReg->compute();
    psMeshReg->addVertexDistanceQuantity("geodesic", dist);
  }
}

References heat, heatReg, psMesh, psMeshReg, skipReg, and sourceVertexId.

Referenced by myCallback().

◆ main()

int main ( void )

Definition at line 204 of file dgtalCalculus-geodesic.cpp.

{
  auto params = SH3::defaultParameters() | SHG3::defaultParameters() |  SHG3::parametersGeometryEstimation();
  params("surfaceComponents", "All");
  params("r-radius", (double) radiusII);
  std::string filename = examplesPath + std::string("/samples/bunny-128.vol");
  binary_image         = SH3::makeBinaryImage(filename, params );
  auto K               = SH3::getKSpace( binary_image, params );
  surface              = SH3::makeDigitalSurface( binary_image, K, params );
  auto primalSurface   = SH3::makePrimalSurfaceMesh(surface);
  
  //Need to convert the faces
  std::vector<std::vector<SH3::SurfaceMesh::Vertex>> faces;
  std::vector<RealPoint> positions;
  
  for(auto face= 0 ; face < primalSurface->nbFaces(); ++face)
    faces.push_back(primalSurface->incidentVertices( face ));
  
  //Recasting to vector of vertices
  positions = primalSurface->positions();
 
  surfmesh = SurfMesh(positions.begin(),
                      positions.end(),
                      faces.begin(),
                      faces.end());
  std::cout << surfmesh << std::endl;
  std::cout<<"number of non-manifold Edges = " << surfmesh.computeNonManifoldEdges().size()<<std::endl;
  
  //Construction of a regularized surface
  DigitalSurfaceRegularization<SH3::DigitalSurface> regul(surface);
  regul.init();
  regul.attachConvolvedTrivialNormalVectors(params);
  regul.regularize();
  auto regularizedPosition = regul.getRegularizedPositions();
 
  surfmeshReg = SurfMesh(regularizedPosition.begin(),
                      regularizedPosition.end(),
                      faces.begin(),
                      faces.end());
  
  // Initialize polyscope
  polyscope::init();
 
  psMesh = polyscope::registerSurfaceMesh("digital surface", positions, faces);
  psMeshReg = polyscope::registerSurfaceMesh("regularized surface", regularizedPosition, faces);
  psMeshReg->setEnabled(false);
 
  // Set the callback function
  polyscope::state::userCallback = myCallback;
  polyscope::show();
  return EXIT_SUCCESS;
}

References DGtal::DigitalSurfaceRegularization< TDigitalSurface >::attachConvolvedTrivialNormalVectors(), binary_image, DGtal::Shortcuts< Z3i::KSpace >::defaultParameters(), DGtal::ShortcutsGeometry< Z3i::KSpace >::defaultParameters(), DGtal::Shortcuts< Z3i::KSpace >::getKSpace(), DGtal::DigitalSurfaceRegularization< TDigitalSurface >::getRegularizedPositions(), DGtal::DigitalSurfaceRegularization< TDigitalSurface >::init(), K, DGtal::Shortcuts< Z3i::KSpace >::makeBinaryImage(), DGtal::Shortcuts< Z3i::KSpace >::makeDigitalSurface(), DGtal::Shortcuts< Z3i::KSpace >::makePrimalSurfaceMesh(), myCallback(), DGtal::ShortcutsGeometry< Z3i::KSpace >::parametersGeometryEstimation(), psMesh, psMeshReg, radiusII, DGtal::DigitalSurfaceRegularization< TDigitalSurface >::regularize(), surface, surfmesh, and surfmeshReg.

◆ myCallback()

void myCallback ( )

Definition at line 159 of file dgtalCalculus-geodesic.cpp.

{
  ImGui::SliderFloat("dt", &dt, 0.,4.);
  ImGui::SliderFloat("ii radius for normal vector estimation", &radiusII , 0.,10.);
  ImGui::Checkbox("Skip regularization", &skipReg);
  ImGui::Checkbox("Using projection", &useProjectedCalculus);
  ImGui::InputInt("Index of the first source vertex", &sourceVertexId);
  
  
  if(ImGui::Button("Precomputation (required if you change parameters)"))
  {
    precompute();
    isPrecomputed=true;
  }
  ImGui::Separator();
  if(ImGui::Button("Add a random source"))
  {
    if (!isPrecomputed)
    {
      precompute();
      isPrecomputed=true;
    }
    addSource();
  }
  if(ImGui::Button("Clear sources"))
  {
    if (!isPrecomputed)
    {
      precompute();
      isPrecomputed=true;
    }
    clearSources();
  }
  
  if(ImGui::Button("Compute geodesic"))
  {
    if (!isPrecomputed)
    {
      precompute();
      isPrecomputed=true;
    }
    computeGeodesics();
  }
}

References addSource(), clearSources(), computeGeodesics(), dt, isPrecomputed, precompute(), radiusII, skipReg, sourceVertexId, and useProjectedCalculus.

◆ precompute()

void precompute ( )

Definition at line 83 of file dgtalCalculus-geodesic.cpp.

{
  
  if (!useProjectedCalculus)
    calculus = new PolyCalculus(surfmesh);
  else
  {
    //Using the projection embedder
    auto params2 = SH3::defaultParameters() | SHG3::defaultParameters() |  SHG3::parametersGeometryEstimation();
    params2("r-radius", (double) radiusII);
    auto surfels   = SH3::getSurfelRange( surface, params2 );
    iinormals = SHG3::getIINormalVectors(binary_image, surfels,params2);
    trace.info()<<iinormals.size()<<std::endl;
    psMesh->addFaceVectorQuantity("II normals", iinormals);
    
    calculus = new PolyCalculus(surfmesh);
    functors::EmbedderFromNormalVectors<Z3i::RealPoint, Z3i::RealVector> embedderFromNormals(iinormals,surfmesh);
    calculus->setEmbedder( embedderFromNormals );
  }
  
  heat = new GeodesicsInHeat<PolyCalculus>(calculus);
  
  if (!skipReg)
  {
    calculusReg = new PolyCalculus(surfmeshReg);
    heatReg = new GeodesicsInHeat<PolyCalculus>(calculusReg);
  }
  trace.beginBlock("Init solvers");
  heat->init(dt);
  if (!skipReg)
    heatReg->init(dt);
  trace.endBlock();
}