Contour Triangulation Example

Example of generating a triangulation from a contour.

• C++

  #include <MRMesh/MRImageLoad.h>
  #include <MRMesh/MRDistanceMap.h>
  #include <MRMesh/MRPolyline.h>
  #include <MRMesh/MRMesh.h>
  #include <MRMesh/MR2DContoursTriangulation.h>
  #include <MRMesh/MRMeshSave.h>
  #include <iostream>
   
  int main()
  {
      // load image as distance map
      auto imageLoadRes = MR::ImageLoad::fromAnySupportedFormat( "logo.jpg" );
      if ( !imageLoadRes.has_value() )
      {
          std::cerr << imageLoadRes.error() << "\n";
          return 1; // error while loading file
      }
      auto dmRes = MR::convertImageToDistanceMap( *imageLoadRes );
      if ( !dmRes.has_value() )
      {
          std::cerr << dmRes.error() << "\n";
          return 1; // error while converting image to distance map
      }
   
      auto pl2 = MR::distanceMapTo2DIsoPolyline( *dmRes, 210.0f );
      auto triangulationRes = MR::PlanarTriangulation::triangulateContours( pl2.contours() );
   
      auto saveRes = MR::MeshSave::toAnySupportedFormat( triangulationRes, "LogoMesh.ctms" );
      if ( !saveRes.has_value() )
      {
          std::cerr << saveRes.error() << "\n";
          return 1; // error while saving file
      }
      return 0;
  }

• Python

  from meshlib import mrmeshpy as mm
  from pathlib import Path
   
  dm = mm.loadDistanceMapFromImage("logo.jpg") # load image
  pl2 = mm.distanceMapTo2DIsoPolyline(dm, 210) # make iso lines from image
  logo_mesh = mm.PlanarTriangulation.triangulateContours(pl2.contours()) # triangulate isolines
   
  mm.saveMesh(logo_mesh, "LogoMesh.ctm")