Method initializeHalfEdgeStructures

kernels/common/scene_subdiv_mesh.cpp:627–664

  }

  void SubdivMesh::Topology::initializeHalfEdgeStructures ()
  {
    /* if vertex indices not set we ignore this topology */
    if (!vertexIndices)
      return;

    /* allocate half edge array */
    halfEdges.resize(mesh->numEdges());

    /* check if we have to recalculate the half edges */
    bool recalculate = false;
    recalculate |= vertexIndices.isLocalModified(); 
    recalculate |= mesh->faceVertices.isLocalModified();
    recalculate |= mesh->holes.isLocalModified();

    /* check if we can simply update the half edges */
    bool update = false;
    update |= mesh->topology[0].vertexIndices.isLocalModified(); // we use this buffer to copy creases to interpolation topologies
    update |= mesh->edge_creases.isLocalModified();
    update |= mesh->edge_crease_weights.isLocalModified();
    update |= mesh->vertex_creases.isLocalModified();
    update |= mesh->vertex_crease_weights.isLocalModified(); 
    update |= mesh->levels.isLocalModified();

    /* now either recalculate or update the half edges */
    if (recalculate) calculateHalfEdges();
    else if (update) updateHalfEdges();
   
    /* cleanup some state for static scenes */
    /* if (mesh->scene_ == nullptr || mesh->scene_->isStaticAccel()) 
    {
      halfEdges0.clear();
      halfEdges1.clear();
    } */

    /* clear modified state of all buffers */
    vertexIndices.clearLocalModified(); 
  }

  void SubdivMesh::printStatistics()
  {