Mesh Boolean

Example of boolean operation

• C++

  #include <MRMesh/MRMesh.h>
  #include <MRMesh/MRMeshBoolean.h>
  #include <MRMesh/MRMeshSave.h>
  #include <MRMesh/MRUVSphere.h>
   
  #include <iostream>
   
  int main()
  {
      // create first sphere with radius of 1 unit
      MR::Mesh sphere1 = MR::makeUVSphere( 1.0f, 64, 64 );
   
      // create second sphere by cloning the first sphere and moving it in X direction
      MR::Mesh sphere2 = sphere1;
      MR::AffineXf3f xf = MR::AffineXf3f::translation( MR::Vector3f( 0.7f, 0.0f, 0.0f ) );
      sphere2.transform( xf );
   
      // perform boolean operation
      MR::BooleanResult result = MR::boolean( sphere1, sphere2, MR::BooleanOperation::Intersection );
      if ( !result.valid() )
          std::cerr << result.errorString << std::endl;
   
      MR::Mesh resultMesh = *result;
   
      // save result to STL file
      if ( auto saveRes = MR::MeshSave::toAnySupportedFormat( resultMesh, "out_boolean.stl" ); !saveRes )
      {
          std::cerr << saveRes.error() << std::endl;
          return 1;
      }
   
      return 0;
  }

  Source meshes
  
  Boolean intersection
  
• Python

  import meshlib.mrmeshpy as mrmeshpy
   
  # create first sphere with radius of 1 unit
  sphere1 = mrmeshpy.makeUVSphere(1.0, 64, 64)
   
  # create second sphere by cloning the first sphere and moving it in X direction
  sphere2 = mrmeshpy.copyMesh(sphere1)
  xf = mrmeshpy.AffineXf3f.translation(mrmeshpy.Vector3f(0.7, 0.0, 0.0))
  sphere2.transform(xf)
   
  # perform boolean operation
  result = mrmeshpy.boolean(sphere1, sphere2, mrmeshpy.BooleanOperation.Intersection)
  if not result.valid():
      print(result.errorString)
  else:
      # save result to STL file
      mrmeshpy.saveMesh(result.mesh, "out_boolean.stl")

  Source meshes
  
  Boolean intersection
  
• C

  #include <MRCMesh/MRAffineXf.h>
  #include <MRCMesh/MRMakeSphereMesh.h>
  #include <MRCMesh/MRMesh.h>
  #include <MRCMesh/MRMeshBoolean.h>
  #include <MRCMesh/MRMeshSave.h>
  #include <MRCMesh/MRVector3.h>
  #include <MRCMisc/expected_void_std_string.h>
  #include <MRCMisc/std_string.h>
   
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
   
  int main( void )
  {
      int rc = EXIT_FAILURE;
   
      // First, create a unit sphere.
      float radius = 1.f; // Set radius for the test
      int horizontalResolution = 64; // Increase horizontal resolution
      int verticalResolution = 64; // Increase vertical resolution
   
      MR_Mesh* sphere1 = MR_makeUVSphere( &radius, &horizontalResolution, &verticalResolution );
   
      // Create a copy of this sphere and offset it.
      MR_Mesh* sphere2 = MR_Mesh_ConstructFromAnother( MR_PassBy_Copy, sphere1 );
      MR_Vector3f xfTranslation = {.x = 0.7f};
      MR_AffineXf3f xf = MR_AffineXf3f_translation( &xfTranslation );
      MR_Mesh_transform( sphere2, &xf, NULL );
   
      // Perform the boolean operation.
      MR_BooleanResult* result = MR_boolean_4_const_MR_Mesh_ref( sphere1, sphere2, MR_BooleanOperation_Intersection, NULL );
      if ( !MR_BooleanResult_valid( result ) )
      {
          fprintf( stderr, "Failed to perform boolean: %s\n", MR_std_string_Data( MR_BooleanResult_Get_errorString( result ) ) );
          goto fail;
      }
   
      // Save result to an STL file.
      MR_expected_void_std_string* saveEx = MR_MeshSave_toAnySupportedFormat_3( MR_BooleanResult_Get_mesh( result ), "out_boolean.stl", NULL, NULL);
      if ( MR_expected_void_std_string_GetError( saveEx ) )
      {
          fprintf( stderr, "Failed to save mesh: %s\n", MR_std_string_Data( MR_expected_void_std_string_GetError( saveEx ) ) );
          goto fail;
      }
   
      rc = EXIT_SUCCESS;
  fail:
      MR_BooleanResult_Destroy( result );
      MR_Mesh_Destroy( sphere2 );
      MR_Mesh_Destroy( sphere1 );
      return rc;
  }

  Source meshes
  
  Boolean intersection
  
• C#

  using System.Reflection;
   
  public class MeshBooleanExample
  {
      public static void Run(string[] args)
      {
          if (args.Length != 3)
          {
              Console.WriteLine("Usage: {0} MeshBooleanExample INPUT1 INPUT2", Assembly.GetExecutingAssembly().GetName().Name);
              return;
          }
   
          try
          {
              // load mesh
              var mesh_a = MR.MeshLoad.FromAnySupportedFormat(args[1]);
              var mesh_b = MR.MeshLoad.FromAnySupportedFormat(args[2]);
   
              // perform boolean operation
              MR.BooleanResult res = MR.Boolean(mesh_a, mesh_b, MR.BooleanOperation.Intersection);
   
              // save result to STL file
              MR.MeshSave.ToAnySupportedFormat(res.Mesh, "out_boolean.stl");
          }
          catch (Exception e)
          {
              Console.WriteLine("Error: {0}", e.Message);
          }
      }
  }

  Source meshes
  
  Boolean intersection