SurfacePhysicsUtils.hh File Reference

#include "corecel/data/Collection.hh"
#include "corecel/math/Algorithms.hh"
#include "corecel/math/ArrayUtils.hh"
#include "celeritas/optical/Types.hh"

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Classes
class	celeritas::optical::EnteringSurfaceNormalSampler< Calculator >
	Sample a valid facet normal by wrapping a roughness calculator. More...

Functions
CELER_FUNCTION bool	celeritas::optical::is_entering_surface (Real3 const &dir, Real3 const &normal)
	Whether a track is entering the surface defined by the given normal.
CELER_FORCEINLINE_FUNCTION SurfaceTrackPosition	celeritas::optical::next_subsurface_position (SurfaceTrackPosition pos, SubsurfaceDirection dir)
	Get the next track surface position in the given direction.
CELER_FUNCTION SubsurfaceDirection	celeritas::optical::calc_subsurface_direction (Real3 const &geo_dir, Real3 const &normal)
	Calculate subsurface direction from a track's geometry direction.

Function Documentation

is_entering_surface()

CELER_FUNCTION bool celeritas::optical::is_entering_surface ( Real3 const &  dir, Real3 const &  normal  )

inline

Whether a track is entering the surface defined by the given normal.

The surface normal convention used in Celeritas optical physics is that the normal direction points opposite the incident track direction. This function makes checks for this condition explicit in the code.

next_subsurface_position()

CELER_FORCEINLINE_FUNCTION SurfaceTrackPosition celeritas::optical::next_subsurface_position	(	SurfaceTrackPosition	pos,
		SubsurfaceDirection	dir
	)

Get the next track surface position in the given direction.

Type-safe operation to ensure direction is only added in track-local frames. Uses unsigned underflow when moving reverse (dir = -1) while on a pre-surface (pos = 0) to wrap to an invalid position value.