TriangleManifoldUtils Namespace Reference

Classes
class	SurfaceChecker

Functions
std::uint64_t	packCell (const std::size_t y_index, const std::size_t z_index)
std::size_t	cellIndex (const Real value, const Real min_value, const Real cell_size, const std::size_t num_cells)

Function Documentation

cellIndex()

std::size_t TriangleManifoldUtils::cellIndex	(	const Real	value,
		const Real	min_value,
		const Real	cell_size,
		const std::size_t	num_cells
	)

Definition at line 33 of file TriangleManifold.C.

Referenced by TriangleManifold::buildCandidateGrid(), and TriangleManifold::rayCandidates().

{
  // Clamp to the valid range so near-boundary roundoff does not produce an invalid cell id.
  if (num_cells <= 1)
    return 0;

  const auto index = static_cast<long long>(std::floor((value - min_value) / cell_size));
  if (index < 0)
    return 0;
  if (index >= static_cast<long long>(num_cells))
    return num_cells - 1;
  return static_cast<std::size_t>(index);
}

packCell()

std::uint64_t TriangleManifoldUtils::packCell	(	const std::size_t	y_index,
		const std::size_t	z_index
	)

Definition at line 26 of file TriangleManifold.C.

Referenced by TriangleManifold::buildCandidateGrid(), and TriangleManifold::rayCandidates().

{
  // The acceleration structure is indexed in yz because all rays travel in the +x direction.
  return (static_cast<std::uint64_t>(y_index) << 32) | static_cast<std::uint64_t>(z_index);
}