OpenVDB 10.0.1
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#include <nanovdb/util/Stencils.h>
Public Types | |
using | GridType = GridT |
using | TreeType = typename GridT::TreeType |
using | ValueType = typename GridT::ValueType |
using | AccessorType = typename GridT::AccessorType |
Public Member Functions | |
GradStencil (const GridType &grid) | |
GradStencil (const GridType &grid, double dx) | |
ValueType | normSqGrad () const |
Return the norm square of the single-sided upwind gradient (computed via Godunov's scheme) at the previously buffered location. | |
Vec3< ValueType > | gradient () const |
Return the gradient computed at the previously buffered location by second order central differencing. | |
Vec3< ValueType > | gradient (const Vec3< ValueType > &V) const |
Return the first-order upwind gradient corresponding to the direction V. | |
ValueType | laplacian () const |
bool | zeroCrossing () const |
Vec3< ValueType > | cpt () |
Compute the closest-point transform to a level set. | |
template<int i, int j, int k> | |
unsigned int | pos () const |
Return linear offset for the specified stencil point relative to its center. | |
void | moveTo (const Coord &ijk) |
Initialize the stencil buffer with the values of voxel (i, j, k) and its neighbors. | |
void | moveTo (const Coord &ijk, const ValueType ¢erValue) |
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. | |
void | moveTo (const IterType &iter) |
Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors. | |
void | moveTo (const Vec3< RealType > &xyz) |
Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors. | |
const ValueType & | getValue (unsigned int pos=0) const |
Return the value from the stencil buffer with linear offset pos. | |
const ValueType & | getValue () const |
Return the value at the specified location relative to the center of the stencil. | |
void | setValue (const ValueType &value) |
Set the value at the specified location relative to the center of the stencil. | |
ValueType | mean () const |
Return the mean value of the current stencil. | |
ValueType | min () const |
Return the smallest value in the stencil buffer. | |
ValueType | max () const |
Return the largest value in the stencil buffer. | |
const Coord & | getCenterCoord () const |
Return the coordinates of the center point of the stencil. | |
const ValueType & | getCenterValue () const |
Return the value at the center of the stencil. | |
bool | intersects (const ValueType &isoValue=ValueType(0)) const |
Return true if the center of the stencil intersects the iso-contour specified by the isoValue. | |
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. | |
const GridType & | grid () const |
Return a const reference to the grid from which this stencil was constructed. | |
const AccessorType & | accessor () const |
Return a const reference to the ValueAccessor associated with this Stencil. | |
Static Public Member Functions | |
static int | size () |
Return the size of the stencil buffer. | |
Static Public Attributes | |
static constexpr int | SIZE = 7 |
Protected Attributes | |
const GridType * | mGrid |
Coord | mCenter |
Friends | |
template<typename , int , typename > | |
class | BaseStencil |
This is a simple 7-point nearest neighbor stencil that supports gradient by second-order central differencing, first-order upwinding, Laplacian, closest-point transform and zero-crossing test.
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inherited |
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inline |
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inline |
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inlineinherited |
Return a const reference to the ValueAccessor associated with this Stencil.
Compute the closest-point transform to a level set.
Return the coordinates of the center point of the stencil.
Return the value at the center of the stencil.
Return the value at the specified location relative to the center of the stencil.
Return the value from the stencil buffer with linear offset pos.
Return the gradient computed at the previously buffered location by second order central differencing.
Return the first-order upwind gradient corresponding to the direction V.
Return a const reference to the grid from which this stencil was constructed.
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.
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).
Return true if the center of the stencil intersects the iso-contour specified by the isoValue.
Return the Laplacian computed at the previously buffered location by second-order central differencing.
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inlineinherited |
Return the largest value in the stencil buffer.
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inlineinherited |
Return the mean value of the current stencil.
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inlineinherited |
Return the smallest value in the stencil buffer.
Initialize the stencil buffer with the values of voxel (i, j, k) and its neighbors.
ijk | Index coordinates of stencil center |
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.
ijk | Index coordinates of stencil center |
centerValue | Value of the center element of the stencil |
Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors.
Initialize the stencil buffer with the values of voxel (x, y, z) and its neighbors.
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.
Return the norm square of the single-sided upwind gradient (computed via Godunov's scheme) at the previously buffered location.
Return linear offset for the specified stencil point relative to its center.
Set the value at the specified location relative to the center of the stencil.
Return true
if the sign of the value at the center point of the stencil is different from the signs of any of its six nearest neighbors.
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protectedinherited |