UE::Geometry::TSphericalFibonacci< RealType > Class Template Reference

#include <SphericalFibonacci.h>

Public Member Functions
	TSphericalFibonacci (int32 NumPoints=64)
int32	Num () const
TVector< RealType >	Point (int32 Index) const
TVector< RealType >	operator[] (int32 Index) const
int32	FindIndex (const TVector< RealType > &P)

Public Attributes
int32	N = 64

Static Protected Member Functions
static RealType	MultiplyAddFrac (RealType a, RealType b)

Detailed Description

template<typename RealType>
class UE::Geometry::TSphericalFibonacci< RealType >

A Spherical Fibonacci (SF) Point Set is a set of points that are roughly evenly distributed on a sphere. The points lie on a spiral, see https://dl.acm.org/doi/10.1145/2816795.2818131 for more information. The i-th SF point an N-point set can be calculated directly. For a given (normalized) point P, finding the nearest SF point (ie mapping back to i) can be done in constant time.

Z is "up" in the sphere.

Constructor & Destructor Documentation

TSphericalFibonacci()

template<typename RealType >

UE::Geometry::TSphericalFibonacci< RealType >::TSphericalFibonacci ( int32  NumPoints = 64 )

inline

Member Function Documentation

FindIndex()

template<typename RealType >

int32 UE::Geometry::TSphericalFibonacci< RealType >::FindIndex ( const TVector< RealType > &  P )

inline

Returns

Index of the sphere point closest to the given point P

MultiplyAddFrac()

template<typename RealType >

static RealType UE::Geometry::TSphericalFibonacci< RealType >::MultiplyAddFrac ( RealType  a, RealType  b  )

inlinestaticprotected

Num()

template<typename RealType >

int32 UE::Geometry::TSphericalFibonacci< RealType >::Num ( ) const

inline

operator[]()

template<typename RealType >

TVector< RealType > UE::Geometry::TSphericalFibonacci< RealType >::operator[] ( int32  Index ) const

inline

Parameters

Index

point index in range [0,Num()-1]

Returns

sphere point for given Index

Point()

template<typename RealType >

TVector< RealType > UE::Geometry::TSphericalFibonacci< RealType >::Point ( int32  Index ) const

inline

Parameters

Index

point index in range [0,Num()-1]

Returns

sphere point for given Index

Member Data Documentation

N

template<typename RealType >

int32 UE::Geometry::TSphericalFibonacci< RealType >::N = 64

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

• Engine/Source/Runtime/GeometryCore/Public/Sampling/SphericalFibonacci.h