EBGeometry::SpanEndT< T > Struct Template Reference

One end of a span: where a ray enters or leaves an object. More...

#include <EBGeometry_Ray.hpp>

Public Types
enum	Kind : uint8_t { Open = 0 , Exact = 1 , Marched = 2 }
	What an end is. More...

Public Member Functions
bool	crossing () const noexcept
	Whether the end is a crossing of the surface.

Public Attributes
T	m_t
	Distance along the ray.
uint32_t	m_leaf
	Which of a composition's leaves the crossing lies on, numbered by the composition; a shape that is not a composition leaves it 0.
Kind	m_kind
	What the end is.

Detailed Description

template<class T>
struct EBGeometry::SpanEndT< T >

One end of a span: where a ray enters or leaves an object.

An end is either a crossing of the object's surface, or the end of the interval the ray was traced over (or of what is known of it; see RaySpansT), which is no crossing. A crossing carries no normal, so that span lists stay small (on a device they live in each thread's local memory, where every word copied or compared costs a memory operation, which is most of what tracing costs): a composition names the leaf it lies on (m_leaf), and asks that leaf for the normal once, at the crossing the trace ends at.

Template Parameters

T	Floating-point precision.

Member Enumeration Documentation

Kind

template<class T >

enum EBGeometry::SpanEndT::Kind : uint8_t

What an end is.

Enumerator
Open	No crossing: an end of the interval, or of what is known.
Exact	A crossing found exactly, by a ray form.
Marched	A crossing found by marching, to within RayOptions::m_tolerance.

Member Function Documentation

crossing()

template<class T >

bool EBGeometry::SpanEndT< T >::crossing ( ) const

inlinenoexcept

Whether the end is a crossing of the surface.

Returns

m_kind != Open.

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The documentation for this struct was generated from the following file:

• Source/EBGeometry_Ray.hpp