CSGUtils Namespace Reference

Functions
CSG::CSGRegion	getInnerRegion (const std::vector< std::reference_wrapper< const CSG::CSGSurface >> &surfaces, const libMesh::Point &origin)
	Get inner region of given surfaces, defined as the intersection of halfspaces of each surface. More...

Function Documentation

getInnerRegion()

CSGRegion CSGUtils::getInnerRegion	(	const std::vector< std::reference_wrapper< const CSG::CSGSurface >> &	surfaces,
		const libMesh::Point &	origin
	)

Get inner region of given surfaces, defined as the intersection of halfspaces of each surface.

Here, the halfspace direction is determined based on the origin.

Parameters

surfaces	List of references to surfaces used to define inner region. This should ideally be defined with the minimum number of surfaces needed to enclose the region
origin	Point used to determine halfspace direction when defining intersected region

Returns

inner region defined by surfaces

Definition at line 19 of file CSGUtils.C.

{
  CSGRegion inner_region;
  for (const auto & surf_ref : surfaces)
  {
    const auto & surf = surf_ref.get();
    const auto direction = surf.getHalfspaceFromPoint(origin);
    auto halfspace = (direction == CSGSurface::Halfspace::POSITIVE) ? +surf : -surf;
    inner_region = (inner_region.getRegionType() == CSGRegion::RegionType::EMPTY)
                       ? halfspace
                       : inner_region & halfspace;
  }
  return inner_region;
}