Mesh modification

Some examples of mesh modification are presented here

• C++

  #include <MRMesh/MRAffineXf3.h>
  #include <MRMesh/MRMesh.h>
  #include <MRMesh/MRMeshRelax.h>
  #include <MRMesh/MRMeshSubdivide.h>
  #include <MRMesh/MRTorus.h>
   
  int main()
  {
      MR::Mesh mesh = MR::makeTorus();
   
      // Relax mesh (5 iterations)
      MR::relax( mesh, {{ .iterations = 5 }} );
   
      // Subdivide mesh
      MR::SubdivideSettings props;
      props.maxDeviationAfterFlip = 0.5f;
      MR::subdivideMesh( mesh, props );
   
      // Rotate mesh
      MR::AffineXf3f rotationXf = MR::AffineXf3f::linear( MR::Matrix3f::rotation( MR::Vector3f::plusZ(), MR::PI_F * 0.5f ) );
      mesh.transform( rotationXf );
   
      return 0;
  }

• Python

  import math
   
  import meshlib.mrmeshpy as mrmeshpy
   
  mesh = mrmeshpy.loadMesh("mesh.stl")
   
  relax_params = mrmeshpy.MeshRelaxParams()
  relax_params.iterations = 5
  mrmeshpy.relax(mesh, relax_params)
   
  props = mrmeshpy.SubdivideSettings()
  props.maxDeviationAfterFlip = 0.5
  mrmeshpy.subdivideMesh(mesh, props)
   
  plus_z = mrmeshpy.Vector3f()
  plus_z.z = 1.0
  rotation_xf = mrmeshpy.AffineXf3f.linear(mrmeshpy.Matrix3f.rotation(plus_z, math.pi * 0.5))
  mesh.transform(rotation_xf)

• C

  #include <MRCMesh/MRAffineXf.h>
  #include <MRCMesh/MRMatrix3.h>
  #include <MRCMesh/MRMesh.h>
  #include <MRCMesh/MRMeshRelax.h>
  #include <MRCMesh/MRMeshSubdivide.h>
  #include <MRCMesh/MRTorus.h>
   
  #include <math.h>
  #include <stdlib.h>
   
  int main( void )
  {
      MR_Mesh* mesh = MR_makeTorus( NULL, NULL, NULL, NULL, NULL );
   
      // Relax mesh (5 iterations)
      MR_MeshRelaxParams* meshRelaxParams = MR_MeshRelaxParams_DefaultConstruct();
      MR_RelaxParams* relaxParams = MR_MeshRelaxParams_MutableUpcastTo_MR_RelaxParams( meshRelaxParams );
      MR_RelaxParams_Set_iterations( relaxParams, 5 );
      MR_relax_3_MR_Mesh( mesh, meshRelaxParams, NULL );
      MR_MeshRelaxParams_Destroy( meshRelaxParams );
   
      // Subdivide mesh
      MR_SubdivideSettings* subdivideSettings = MR_SubdivideSettings_DefaultConstruct();
      MR_SubdivideSettings_Set_maxDeviationAfterFlip( subdivideSettings, 0.5f );
      MR_subdivideMesh_MR_Mesh( mesh, subdivideSettings );
      MR_SubdivideSettings_Destroy( subdivideSettings );
   
      // Rotate mesh
      MR_Vector3f plusZ = MR_Vector3f_plusZ();
      MR_Matrix3f rotMat = MR_Matrix3f_rotation_float( &plusZ, 1.57079632679489661923 ); // pi/2
      MR_AffineXf3f rotXf = MR_AffineXf3f_linear( &rotMat );
      MR_Mesh_transform( mesh, &rotXf, NULL );
   
      MR_Mesh_Destroy( mesh );
      return EXIT_SUCCESS;
  }