Resolving Mesh Degeneration

Example of resolving degenerated faces

• C

  #include <MRMeshC/MRMesh.h>
  #include <MRMeshC/MRMeshDecimate.h>
  #include <MRMeshC/MRMeshLoad.h>
  #include <MRMeshC/MRMeshSave.h>
  #include <MRMeshC/MRString.h>
   
  #include <stdio.h>
  #include <stdlib.h>
   
  int main( int argc, char* argv[] )
  {
      int rc = EXIT_FAILURE;
      if ( argc != 2 && argc != 3 )
      {
          fprintf( stderr, "Usage: %s INPUT [OUTPUT]", argv[0] );
          goto out;
      }
   
      const char* input = argv[1];
      const char* output = ( argc == 2 ) ? argv[1] : argv[2];
   
      // error messages will be stored here
      MRString* errorString = NULL;
   
      MRMesh* mesh = mrMeshLoadFromAnySupportedFormat( input, &errorString );
      if ( errorString )
      {
          fprintf( stderr, "Failed to load mesh: %s", mrStringData( errorString ) );
          mrStringFree( errorString );
          goto out;
      }
   
      // you can set various parameters for the resolving process; see the documentation for more info
      MRResolveMeshDegenSettings params = mrResolveMeshDegenSettingsNew();
      // maximum permitted deviation
      const MRBox3f bbox = mrMeshComputeBoundingBox( mesh, NULL );
      params.maxDeviation = 1e-5f * mrBox3fDiagonal( &bbox );
      // maximum length of edges to be collapsed
      params.tinyEdgeLength = 1e-3f;
   
      bool changed = mrResolveMeshDegenerations( mesh, &params );
      if ( !changed && output == input )
      {
          fprintf( stderr, "No changes were made" );
          goto out_mesh;
      }
   
      MRSaveSettings saveSettings = mrSaveSettingsNew();
      mrMeshSaveToAnySupportedFormat( mesh, output, &saveSettings, &errorString);
      if ( errorString )
      {
          fprintf( stderr, "Failed to save mesh: %s", mrStringData( errorString ) );
          mrStringFree( errorString );
          goto out_mesh;
      }
   
      rc = EXIT_SUCCESS;
  out_mesh:
      mrMeshFree( mesh );
  out:
      return rc;
  }