#include <nanovdb/util/Stencils.h>

Inherits BaseStencil< BoxStencil< GridT >, 8, GridT >.

Public Types
using	GridType = GridT

using	TreeType = typename GridT::TreeType

using	ValueType = typename GridT::ValueType

using	AccessorType = typename GridT::AccessorType

Public Member Functions
__hostdev__	BoxStencil (const GridType &grid)

template<int i, int j, int k>
__hostdev__ unsigned int	pos () const
	Return linear offset for the specified stencil point relative to its center. More...

__hostdev__ bool	intersects (ValueType isoValue=ValueType(0)) const
	Return true if the center of the stencil intersects the. More...

__hostdev__ ValueType	interpolation (const Vec3< ValueType > &xyz) const
	Return the trilinear interpolation at the normalized position. More...

__hostdev__ Vec3< ValueType >	gradient (const Vec3< ValueType > &xyz) const
	Return the gradient in world space of the trilinear interpolation kernel. More...

__hostdev__ void	moveTo (const Coord &ijk)
	Initialize the stencil buffer with the values of voxel (i, j, k) and its neighbors. More...

__hostdev__ void	moveTo (const Coord &ijk, const ValueType &centerValue)
	Initialize the stencil buffer with the values of voxel (i, j, k) and its neighbors. The method also takes a value of the center element of the stencil, assuming it is already known. More...

__hostdev__ void	moveTo (const IterType &iter)
	Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors. More...

__hostdev__ void	moveTo (const Vec3< RealType > &xyz)
	Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors. More...

__hostdev__ const ValueType &	getValue (unsigned int pos=0) const
	Return the value from the stencil buffer with linear offset pos. More...

__hostdev__ const ValueType &	getValue () const
	Return the value at the specified location relative to the center of the stencil. More...

__hostdev__ void	setValue (const ValueType &value)
	Set the value at the specified location relative to the center of the stencil. More...

__hostdev__ ValueType	mean () const
	Return the mean value of the current stencil. More...

__hostdev__ ValueType	min () const
	Return the smallest value in the stencil buffer. More...

__hostdev__ ValueType	max () const
	Return the largest value in the stencil buffer. More...

__hostdev__ const Coord &	getCenterCoord () const
	Return the coordinates of the center point of the stencil. More...

__hostdev__ const ValueType &	getCenterValue () const
	Return the value at the center of the stencil. More...

__hostdev__ bool	intersects (const ValueType &isoValue=ValueType(0)) const
	Return true if the center of the stencil intersects the iso-contour specified by the isoValue. More...

__hostdev__ Mask	intersectionMask (ValueType isoValue=ValueType(0)) const
	Return true a bit-mask where the 6 lower bits indicates if the center of the stencil intersects the iso-contour specified by the isoValue. More...

__hostdev__ const GridType &	grid () const
	Return a const reference to the grid from which this stencil was constructed. More...

__hostdev__ const AccessorType &	accessor () const
	Return a const reference to the ValueAccessor associated with this Stencil. More...

Static Public Member Functions
static __hostdev__ int	size ()
	Return the size of the stencil buffer. More...

Static Public Attributes
static constexpr int	SIZE = 8

Protected Attributes
const GridType *	mGrid

AccessorType	mAcc

ValueType	mValues [SIZE]

Coord	mCenter

Friends
template<typename , int , typename >
class	BaseStencil

Member Typedef Documentation

using AccessorType = typename GridT::AccessorType

inherited

using GridType = GridT

using TreeType = typename GridT::TreeType

using ValueType = typename GridT::ValueType

Constructor & Destructor Documentation

__hostdev__ BoxStencil ( const GridType & grid )

inline

Member Function Documentation

__hostdev__ const AccessorType& accessor ( ) const

inlineinherited

Return a const reference to the ValueAccessor associated with this Stencil.

__hostdev__ const Coord& getCenterCoord ( ) const

inlineinherited

Return the coordinates of the center point of the stencil.

__hostdev__ const ValueType& getCenterValue ( ) const

inlineinherited

Return the value at the center of the stencil.

__hostdev__ const ValueType& getValue ( unsigned int pos = 0 ) const

inlineinherited

Return the value from the stencil buffer with linear offset pos.

Note: The default (pos = 0) corresponds to the first element which is typically the center point of the stencil.

__hostdev__ const ValueType& getValue ( ) const

inlineinherited

Return the value at the specified location relative to the center of the stencil.

__hostdev__ Vec3<ValueType> gradient ( const Vec3< ValueType > & xyz ) const

inline

Return the gradient in world space of the trilinear interpolation kernel.

Parameters

xyz	Floating point coordinate position.

Warning: It is assumed that the stencil has already been moved to the relevant voxel position, e.g. using moveTo(xyz).

Note

Computed as partial derivatives of the trilinear interpolation kernel: v000 (1-u)(1-v)(1-w) + v001 (1-u)(1-v)w + v010 (1-u)v(1-w) + v011 (1-u)vw

v100 u(1-v)(1-w) + v101 u(1-v)w + v110 uv(1-w) + v111 uvw

__hostdev__ const GridType& grid ( ) const

inlineinherited

Return a const reference to the grid from which this stencil was constructed.

__hostdev__ ValueType interpolation ( const Vec3< ValueType > & xyz ) const

inline

Return the trilinear interpolation at the normalized position.

Parameters

xyz	Floating point coordinate position. Index space and NOT world space.

Warning: It is assumed that the stencil has already been moved to the relevant voxel position, e.g. using moveTo(xyz).

Note

Trilinear interpolation kernal reads as: v000 (1-u)(1-v)(1-w) + v001 (1-u)(1-v)w + v010 (1-u)v(1-w) + v011 (1-u)vw

v100 u(1-v)(1-w) + v101 u(1-v)w + v110 uv(1-w) + v111 uvw

__hostdev__ Mask intersectionMask ( ValueType isoValue = ValueType(0) ) const

inlineinherited

Return true a bit-mask where the 6 lower bits indicates if the center of the stencil intersects the iso-contour specified by the isoValue.

Note: There are 2^6 = 64 different possible cases, including no intersections!

The ordering of bit mask is ( -x, +x, -y, +y, -z, +z ), so to check if there is an intersection in -y use (mask & (1u<<2)) where mask is ther return value from this function. To check if there are any intersections use mask!=0u, and for no intersections use mask==0u. To count the number of intersections use __builtin_popcount(mask).

__hostdev__ bool intersects ( const ValueType & isoValue = ValueType(0) ) const

inlineinherited

Return true if the center of the stencil intersects the iso-contour specified by the isoValue.

__hostdev__ bool intersects ( ValueType isoValue = ValueType(0) ) const

inline

Return true if the center of the stencil intersects the.

iso-contour specified by the isoValue

__hostdev__ ValueType max ( ) const

inlineinherited

Return the largest value in the stencil buffer.

__hostdev__ ValueType mean ( ) const

inlineinherited

Return the mean value of the current stencil.

__hostdev__ ValueType min ( ) const

inlineinherited

Return the smallest value in the stencil buffer.

__hostdev__ void moveTo ( const Coord & ijk )

inlineinherited

Initialize the stencil buffer with the values of voxel (i, j, k) and its neighbors.

Parameters

ijk	Index coordinates of stencil center

__hostdev__ void moveTo	(	const Coord &	ijk,
		const ValueType &	centerValue
	)

inlineinherited

Initialize the stencil buffer with the values of voxel (i, j, k) and its neighbors. The method also takes a value of the center element of the stencil, assuming it is already known.

Parameters

ijk	Index coordinates of stencil center
centerValue	Value of the center element of the stencil

__hostdev__ void moveTo ( const IterType & iter )

inlineinherited

Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors.

Note: This version is slightly faster than the one above, since the center voxel's value is read directly from the iterator.

__hostdev__ void moveTo ( const Vec3< RealType > & xyz )

inlineinherited

Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors.

Parameters

xyz	Floating point voxel coordinates of stencil center

This method will check to see if it is necessary to update the stencil based on the cached index coordinates of the center point.

__hostdev__ unsigned int pos ( ) const

inline

Return linear offset for the specified stencil point relative to its center.

__hostdev__ void setValue ( const ValueType & value )

inlineinherited

Set the value at the specified location relative to the center of the stencil.

static __hostdev__ int size ( )

inlinestaticinherited

Return the size of the stencil buffer.

Friends And Related Function Documentation

friend class BaseStencil

friend

Member Data Documentation

AccessorType mAcc

protectedinherited

Coord mCenter

protectedinherited

const GridType* mGrid

protectedinherited

ValueType mValues[SIZE]

protectedinherited

constexpr int SIZE = 8

static

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Attributes

Friends

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation