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GU_SDF Class Reference

#include <GU_SDF.h>

Public Types

enum  sdfImplicitType {
  SDF_EXPLICIT, SDF_SPHERE, SDF_PLANE, SDF_BOX,
  SDF_HEIGHTFIELD
}
 

Public Member Functions

 GU_SDF ()
 
virtual ~GU_SDF ()
 
void build (const GU_Detail *gdp, const GU_SDFParms &parms)
 Build from the given gdp. More...
 
void initEmpty (const UT_BoundingBox &bbox, int xres, int yres, int zres)
 
UT_VoxelArrayFgetFunction () const
 
const GEO_PrimVolumeXformgetHeightXform () const
 Returns the transform of a heightfield SDF. More...
 
int getHeightAxis () const
 Returns the vertical axis of a heightfield SDF. More...
 
bool isImplicit () const
 
bool isValid () const
 
sdfImplicitType getImplicitType () const
 Returns the type of implicit surface, if any. More...
 
const UT_Vector3getImplicitNormal () const
 
void getDivisions (int &xdiv, int &ydiv, int &zdiv) const
 
fpreal getDistance (const UT_Vector3 &pos) const
 Calculates the SDF field at the point. More...
 
fpreal getFastDistance (const UT_Vector3 &pos, fpreal &tol) const
 
UT_Vector3 getGradient (const UT_Vector3 &pos) const
 Returns the gradient of the SDF at the point. More...
 
UT_Vector3 findClosest (const UT_Vector3 &pos, fpreal iso=0.0, fpreal cfl_cond=0.9, fpreal tol=1e-3) const
 
UT_Vector3 advect (const UT_Vector3 &pos, fpreal dist, fpreal cfl_cond=0.9f, bool normalize_gradient=true) const
 
bool findSmallestOnEdge (fpreal &minvalue, UT_Vector3 &result, const UT_Vector3 &a, const UT_Vector3 &b, fpreal cutoff=SYS_FPREAL_MAX) const
 
bool findSmallestOnTri (fpreal &minValue, UT_Vector2 &resultBary, const UT_Vector3 &p0, const UT_Vector3 &p1, const UT_Vector3 &p2, fpreal cutoff=SYS_FPREAL_MAX) const
 
bool findRayIntersection (UT_Vector3 &result, const UT_Vector3 &a, const UT_Vector3 &b, fpreal boundaryvalue=0.0) const
 
const UT_Vector3getVoxelSize () const
 
fpreal getVoxelDiameter () const
 
const UT_Vector3getSize () const
 
const UT_Vector3getOrig () const
 
void setOrig (const UT_Vector3 &o)
 
void setSize (const UT_Vector3 &s)
 
void computeCenterOfMass (UT_Vector3 &centerofmass) const
 Computes the center of mass of the SDF. More...
 
fpreal computeVolume () const
 Computes the volume of the SDF. More...
 
void computeInertialTensor (UT_DMatrix3 &tensor, const UT_Vector3 &centerofmass) const
 
int64 getMemoryUsage () const
 Returns the amount of memory used by this object. More...
 
bool isInverted () const
 
void setInverted (bool invert)
 
fpreal getOffset () const
 
void setOffset (fpreal offset)
 
void save (std::ostream &os) const
 
bool load (UT_IStream &is)
 

Static Public Member Functions

static void expandBounds (UT_BoundingBox &bbox, int xres, int yres, int zres)
 
static bool isMultithreaded (const GU_SDFParms &parms)
 Returns whether the specified build mode is multithreaded. More...
 

Protected Member Functions

void sendRays (const GU_Detail *gdp, bool laserscan, bool usemetafield, fpreal tol)
 
void fixSigns (bool forcebounds)
 
int findConsensus (int x, int y, int z, int iteration, fpreal alpha, fpreal beta, UT_Array< gu_sdf_voxpos > &flippedlist)
 
int fastSweepCorrect (GU_RayIntersect *isect, int axis, int dir, fpreal alpha, fpreal tol)
 
void rasterize (const GEO_Primitive *prim)
 Rasterizers... More...
 
void rasterizePoly (const GEO_PrimPoly *poly)
 
void rasterizeRawTri (UT_Vector3 p1, UT_Vector3 p2, UT_Vector3 p3)
 This takes coordinates in cell space. More...
 
void setCellDist (int x, int y, int z, fpreal dist, fpreal maxdist=-1.0)
 
void setCellTentative (int x, int y, int z, fpreal tentative)
 Sets a tentative value to a given cell. More...
 
gu_sdf_qelemgetQElem (int x, int y, int z, bool create=true)
 
void updateQElem (gu_sdf_qelem *qelem)
 If you change the weight of the qelem, this will update the queue. More...
 
fpreal findMinDist (int x, int y, int z, fpreal olddist) const
 
void propagateQueue (fpreal maxdist)
 
void buildFromMinDist (GU_RayIntersect &isect, int x, int y, int z, int xw, int yw, int zw)
 
void buildFromPointCloud (const GU_Detail *gdp, const GU_SDFParms &parms)
 
bool findZeroCrossing (UT_VoxelProbeCubeF &src_probe, fpreal &voxeldist, const fpreal isocontour)
 
void buildFromVolumeFIM (const UT_VoxelArrayF &src, const fpreal isocontour, const fpreal maxdist, const fpreal tolerance, const int iterations)
 
 THREADED_METHOD7 (GU_SDF, activelist.entries() > 100, solveEikonalIterationFIM, UT_VoxelArrayF &, dst, UT_Array< UT_Array< UT_Vector3I >> &, newlist, UT_Array< bool > &, tileoccupied, const UT_VoxelArrayF &, olddst, const UT_Array< UT_Vector3I > &, activelist, const fpreal, maxdist, const fpreal, tolerance)
 
void solveEikonalIterationFIMPartial (UT_VoxelArrayF &dst, UT_Array< UT_Array< UT_Vector3I >> &newlist, UT_Array< bool > &tileoccupied, const UT_VoxelArrayF &olddst, const UT_Array< UT_Vector3I > &activelist, const fpreal maxdist, const fpreal tolerance, const UT_JobInfo &info)
 
 THREADED_METHOD1 (GU_SDF, activelist.entries() > 100, assignSolvableLabelsFIM, const UT_Array< UT_Vector3I > &, activelist)
 
void assignSolvableLabelsFIMPartial (const UT_Array< UT_Vector3I > &activelist, const UT_JobInfo &info)
 
 THREADED_METHOD1 (GU_SDF, activelist.entries() > 100, removeSolvableLabelsFIM, const UT_Array< UT_Vector3I > &, activelist)
 
void removeSolvableLabelsFIMPartial (const UT_Array< UT_Vector3I > &activelist, const UT_JobInfo &info)
 
 THREADED_METHOD2 (GU_SDF, myQueueIndices->numTiles() > 20, loadFinishedCellNeighboursFIM, UT_Array< UT_Array< UT_Vector3I >> &, newlist, UT_Array< bool > &, tileoccupied)
 
void loadFinishedCellNeighboursFIMPartial (UT_Array< UT_Array< UT_Vector3I >> &list, UT_Array< bool > &tileoccupied, const UT_JobInfo &info)
 
 THREADED_METHOD3 (GU_SDF, occupied.entries() > 100, uncompressActiveTilesFIM, UT_VoxelArrayF &, olddst, UT_VoxelArrayF &, dst, const UT_Array< bool > &, occupied)
 
void uncompressActiveTilesFIMPartial (UT_VoxelArrayF &olddst, UT_VoxelArrayF &dst, const UT_Array< bool > &occupied, const UT_JobInfo &info)
 
 THREADED_METHOD5 (GU_SDF, src.numTiles() > 20, computeAndLabelZeroCrossingsFIM, UT_VoxelArrayF &, dst, UT_VoxelArrayF &, olddst, const UT_VoxelArrayF &, src, const fpreal, isocontour, const fpreal, maxdist)
 
void computeAndLabelZeroCrossingsFIMPartial (UT_VoxelArrayF &dst, UT_VoxelArrayF &olddst, const UT_VoxelArrayF &src, const fpreal isocontour, const fpreal maxdist, const UT_JobInfo &info)
 
 THREADED_METHOD5 (GU_SDF, src.numTiles() > 20, buildVolumeZeroCrossings, UT_Array< UT_Array< UT_Vector3I >> &, crossingindices, UT_Array< UT_Array< fpreal >> &, crossingdists, const UT_VoxelArrayF &, src, const fpreal, isocontour, const fpreal, maxdist)
 
void buildVolumeZeroCrossingsPartial (UT_Array< UT_Array< UT_Vector3I >> &crossingindices, UT_Array< UT_Array< fpreal >> &crossingdists, const UT_VoxelArrayF &src, const fpreal isocontour, const fpreal maxdist, const UT_JobInfo &info)
 
void buildFromVolume (const UT_VoxelArrayF &src, const fpreal isocontour, const fpreal maxdist)
 
UT_Plane findPlaneFromNeighbour (const UT_Vector3 &sample, const GU_Detail *gdp, const GA_OffsetArray &neighbour, const GA_ROHandleV3 &normalattrib) const
 
 THREADED_METHOD2 (GU_SDF, myVoxels->numTiles() > 16, copyVolumeSamples, const GU_Detail *, gdp, const UT_ValArray< const GEO_Primitive * > &, volumes)
 
void copyVolumeSamplesPartial (const GU_Detail *gdp, const UT_ValArray< const GEO_Primitive * > &volumes, const UT_JobInfo &info)
 

Protected Attributes

UT_VoxelArrayFmyVoxels
 
sdfImplicitType myImplicitType
 
UT_Vector3 myImplicitNormal
 
bool myInvert
 
fpreal myOffset
 This defines how far we should shift the zero isosurface of the SDF. More...
 
UT_Vector3 myOrig
 
UT_Vector3 mySize
 
GEO_PrimVolumeXform myHeightXform
 
int myHeightAxis
 
UT_Vector3 myVoxelSize
 This stores the size of a voxel along each axis. More...
 
fpreal myVoxelDiameter
 This caches the diameter of a voxel cell. Ie, myVoxelSize.length() More...
 
UT_VoxelArray< int > * myQueueIndices
 
UT_ValArray< gu_sdf_qelem * > myQueueElements
 
UT_IntArray myQueueFreeList
 
gu_sdf_queuemyQueue
 

Detailed Description

GU_SDF This class builds a signed distance function from a given GU_Detail. Signed distance functions contain an approximate distance to the original surface in each voxel cell. If cell is inside the the geometry, it has a negative distance. Sidedness of geometry is determined by surface normals. The geometry should be relatively watertight.

Definition at line 302 of file GU_SDF.h.

Member Enumeration Documentation

Enumerator
SDF_EXPLICIT 
SDF_SPHERE 
SDF_PLANE 
SDF_BOX 
SDF_HEIGHTFIELD 

Definition at line 308 of file GU_SDF.h.

Constructor & Destructor Documentation

GU_SDF::GU_SDF ( )
virtual GU_SDF::~GU_SDF ( )
virtual

Member Function Documentation

UT_Vector3 GU_SDF::advect ( const UT_Vector3 pos,
fpreal  dist,
fpreal  cfl_cond = 0.9f,
bool  normalize_gradient = true 
) const

Advects a point according to the SDF's gradient field. Advection continues until the point has moved the given distance. If normalize_gradient is false, it is moved until the given amount of time has passed.

void GU_SDF::assignSolvableLabelsFIMPartial ( const UT_Array< UT_Vector3I > &  activelist,
const UT_JobInfo info 
)
protected
void GU_SDF::build ( const GU_Detail gdp,
const GU_SDFParms parms 
)

Build from the given gdp.

void GU_SDF::buildFromMinDist ( GU_RayIntersect isect,
int  x,
int  y,
int  z,
int  xw,
int  yw,
int  zw 
)
protected

Builds a shell of distance values around the geometry based on minimum distance values. We want to fill in the cell values from (x,y,z) to (x+xw-1,y+yw-1,z+zw-1) inclusive. We only fill values that are within a band about the surface, leaving the rest for FMM. This is because min distance calls are expensive!

void GU_SDF::buildFromPointCloud ( const GU_Detail gdp,
const GU_SDFParms parms 
)
protected

Builds a shell of distance values around the geometry from the point cloud data. If normals are present, they are used to calculate sidedness. Otherwise, the SDF becomes an unsigned distance-to-implicit surface.

void GU_SDF::buildFromVolume ( const UT_VoxelArrayF src,
const fpreal  isocontour,
const fpreal  maxdist 
)
protected

Builds a shell of distance values around the given iso-contour of the volume. This allows one to then reinitialize an SDF function.

void GU_SDF::buildFromVolumeFIM ( const UT_VoxelArrayF src,
const fpreal  isocontour,
const fpreal  maxdist,
const fpreal  tolerance,
const int  iterations 
)
protected
void GU_SDF::buildVolumeZeroCrossingsPartial ( UT_Array< UT_Array< UT_Vector3I >> &  crossingindices,
UT_Array< UT_Array< fpreal >> &  crossingdists,
const UT_VoxelArrayF src,
const fpreal  isocontour,
const fpreal  maxdist,
const UT_JobInfo info 
)
protected
void GU_SDF::computeAndLabelZeroCrossingsFIMPartial ( UT_VoxelArrayF dst,
UT_VoxelArrayF olddst,
const UT_VoxelArrayF src,
const fpreal  isocontour,
const fpreal  maxdist,
const UT_JobInfo info 
)
protected
void GU_SDF::computeCenterOfMass ( UT_Vector3 centerofmass) const

Computes the center of mass of the SDF.

void GU_SDF::computeInertialTensor ( UT_DMatrix3 tensor,
const UT_Vector3 centerofmass 
) const

Computes the inertial tensor. You provide the center of mass for it to use. Each sample point of the SDF is treated as a point mass. The mass is 0 for cell-points outside of the object, 1 for those fully inside, and suitably scaled for others.

fpreal GU_SDF::computeVolume ( ) const

Computes the volume of the SDF.

void GU_SDF::copyVolumeSamplesPartial ( const GU_Detail gdp,
const UT_ValArray< const GEO_Primitive * > &  volumes,
const UT_JobInfo info 
)
protected
static void GU_SDF::expandBounds ( UT_BoundingBox bbox,
int  xres,
int  yres,
int  zres 
)
static

Expands the given bounding box so it contains a two cell border on all sides. This helps condition the SDF stuff by ensuring the outer cells are all outside.

int GU_SDF::fastSweepCorrect ( GU_RayIntersect isect,
int  axis,
int  dir,
fpreal  alpha,
fpreal  tol 
)
protected

Performs a fast sweep along the given axis. Any voxel pair that has a bad consensus will be raytested & flipped. The flip is then propagated. dir is +/-1 to represent a forward or back sweep.

UT_Vector3 GU_SDF::findClosest ( const UT_Vector3 pos,
fpreal  iso = 0.0,
fpreal  cfl_cond = 0.9,
fpreal  tol = 1e-3 
) const

Returns the closest point on the iso surface to the given point. The Courant-Friedreichs-Lewy condition governs how carefully we step to find the solution. 0.9 is near optimal, 0.5 is conservative.

int GU_SDF::findConsensus ( int  x,
int  y,
int  z,
int  iteration,
fpreal  alpha,
fpreal  beta,
UT_Array< gu_sdf_voxpos > &  flippedlist 
)
protected

This finds consensus among the neighbours of this point It may then flip this points sign. If it does so, the point and it's neighbours are added to the list to be tested in the future. This uses myQueueIndices to track if a voxel has been added before. Returns 1 if a point flipped, 0 otherwise.

fpreal GU_SDF::findMinDist ( int  x,
int  y,
int  z,
fpreal  olddist 
) const
protected

Calculates the distance to a cell by using the finalized distances to adjacent cells. The olddistance is used to determine sign.

UT_Plane GU_SDF::findPlaneFromNeighbour ( const UT_Vector3 sample,
const GU_Detail gdp,
const GA_OffsetArray neighbour,
const GA_ROHandleV3 normalattrib 
) const
protected

Takes a list of GEO_Points and finds the best fititng plane which interpolates them. If noff is not -1, it will derive the normals from the point normals.

bool GU_SDF::findRayIntersection ( UT_Vector3 result,
const UT_Vector3 a,
const UT_Vector3 b,
fpreal  boundaryvalue = 0.0 
) const

Returns the point along a path where it first intersects the SDF. If the path doesn't intersect the SDF, this function returns false. If the start of the path is inside the SDF, the function returns true, and returns the starting point of the path as the intersection.

bool GU_SDF::findSmallestOnEdge ( fpreal minvalue,
UT_Vector3 result,
const UT_Vector3 a,
const UT_Vector3 b,
fpreal  cutoff = SYS_FPREAL_MAX 
) const

Finds the smallest value in the SDF along the given line segment. The value must be smaller than the cutoff value. Returns false if no close value found.

bool GU_SDF::findSmallestOnTri ( fpreal minValue,
UT_Vector2 resultBary,
const UT_Vector3 p0,
const UT_Vector3 p1,
const UT_Vector3 p2,
fpreal  cutoff = SYS_FPREAL_MAX 
) const

Finds the smallest value in the SDF inside the given triangle. The value must be smaller than the cutoff value. Returns false if no close value found.

Note: this algorithm is far from perfect. It does only a very partial scan over the interior of the triangle, and it doesn't work well with implicit box SDFs.

bool GU_SDF::findZeroCrossing ( UT_VoxelProbeCubeF src_probe,
fpreal voxeldist,
const fpreal  isocontour 
)
protected
void GU_SDF::fixSigns ( bool  forcebounds)
protected

This fixes the sign of the distance field by finding a consensus among neighbouring voxels. This requires myQueueIndices to be present. If forcebounds is set, it will make the boundary all positive in sign, making it easier to recover from holes.

fpreal GU_SDF::getDistance ( const UT_Vector3 pos) const

Calculates the SDF field at the point.

void GU_SDF::getDivisions ( int xdiv,
int ydiv,
int zdiv 
) const

Returns the divisions that the spaces is voxelized into. This is meaningful even for implicit surfaces, as they have a prefered division set for purposes like advection.

fpreal GU_SDF::getFastDistance ( const UT_Vector3 pos,
fpreal tol 
) const
UT_VoxelArrayF* GU_SDF::getFunction ( ) const
inline

Definition at line 333 of file GU_SDF.h.

UT_Vector3 GU_SDF::getGradient ( const UT_Vector3 pos) const

Returns the gradient of the SDF at the point.

int GU_SDF::getHeightAxis ( ) const
inline

Returns the vertical axis of a heightfield SDF.

Definition at line 340 of file GU_SDF.h.

const GEO_PrimVolumeXform& GU_SDF::getHeightXform ( ) const
inline

Returns the transform of a heightfield SDF.

Definition at line 336 of file GU_SDF.h.

const UT_Vector3& GU_SDF::getImplicitNormal ( ) const
inline

The normal definining the implicit function. This is only meaninful for half-plane implicit functions.

Definition at line 364 of file GU_SDF.h.

sdfImplicitType GU_SDF::getImplicitType ( ) const
inline

Returns the type of implicit surface, if any.

Definition at line 359 of file GU_SDF.h.

int64 GU_SDF::getMemoryUsage ( ) const

Returns the amount of memory used by this object.

fpreal GU_SDF::getOffset ( ) const
inline

These offset the zero isosurface of the SDF. This means that getDistance() will always return getDistance() - offset, effectively inflating (if offset is positive) or deflating (if offset is negative) the object.

Offsetting happens before inversion.

Definition at line 483 of file GU_SDF.h.

const UT_Vector3& GU_SDF::getOrig ( ) const
inline

Definition at line 445 of file GU_SDF.h.

gu_sdf_qelem* GU_SDF::getQElem ( int  x,
int  y,
int  z,
bool  create = true 
)
protected

Gets or creates the qelement at the given location. Returns 0 if the element has already been processed.

const UT_Vector3& GU_SDF::getSize ( ) const
inline

Definition at line 444 of file GU_SDF.h.

fpreal GU_SDF::getVoxelDiameter ( ) const
inline

Definition at line 443 of file GU_SDF.h.

const UT_Vector3& GU_SDF::getVoxelSize ( ) const
inline

Definition at line 442 of file GU_SDF.h.

void GU_SDF::initEmpty ( const UT_BoundingBox bbox,
int  xres,
int  yres,
int  zres 
)

Initializes an empty sdf of a given resolution and from a given bounding box.

bool GU_SDF::isImplicit ( ) const
inline

Implicit SDFs have no array of voxels, instead defining themselves as a simple atomic shape.

Definition at line 344 of file GU_SDF.h.

bool GU_SDF::isInverted ( ) const
inline

These invert the sense of the SDF. This means the getDistance() function will always return -getDistance(), effectively turning the object inside out. This does not affect the calculation of volumes, etc! (Technically, an inverted SDF has infinite volume, which isn't all that useful anyways)

Definition at line 474 of file GU_SDF.h.

static bool GU_SDF::isMultithreaded ( const GU_SDFParms parms)
inlinestatic

Returns whether the specified build mode is multithreaded.

Definition at line 353 of file GU_SDF.h.

bool GU_SDF::isValid ( void  ) const
inline

Definition at line 347 of file GU_SDF.h.

bool GU_SDF::load ( UT_IStream is)
void GU_SDF::loadFinishedCellNeighboursFIMPartial ( UT_Array< UT_Array< UT_Vector3I >> &  list,
UT_Array< bool > &  tileoccupied,
const UT_JobInfo info 
)
protected
void GU_SDF::propagateQueue ( fpreal  maxdist)
protected

Propagate distances from all elements in the queue until maximum distance is reached.

void GU_SDF::rasterize ( const GEO_Primitive prim)
protected

Rasterizers...

void GU_SDF::rasterizePoly ( const GEO_PrimPoly poly)
protected
void GU_SDF::rasterizeRawTri ( UT_Vector3  p1,
UT_Vector3  p2,
UT_Vector3  p3 
)
protected

This takes coordinates in cell space.

void GU_SDF::removeSolvableLabelsFIMPartial ( const UT_Array< UT_Vector3I > &  activelist,
const UT_JobInfo info 
)
protected
void GU_SDF::save ( std::ostream &  os) const

Load and save this SDF. This occurs in binary format.

void GU_SDF::sendRays ( const GU_Detail gdp,
bool  laserscan,
bool  usemetafield,
fpreal  tol 
)
protected

This sends rays along all the major axes. The cell distances are set to the distance along the axes to surfaces.

void GU_SDF::setCellDist ( int  x,
int  y,
int  z,
fpreal  dist,
fpreal  maxdist = -1.0 
)
protected

This sets the given cell to a specific SDF value. This will be considered a finalized value, so it will be written to the output voxel array, any QElem will be deleted, and any neighbouring cells will get tentative values. Propagation to neighbouring cells only occurs if dist < maxdist, unless maxdist < 0

void GU_SDF::setCellTentative ( int  x,
int  y,
int  z,
fpreal  tentative 
)
protected

Sets a tentative value to a given cell.

void GU_SDF::setInverted ( bool  invert)
inline

Definition at line 475 of file GU_SDF.h.

void GU_SDF::setOffset ( fpreal  offset)
inline

Definition at line 484 of file GU_SDF.h.

void GU_SDF::setOrig ( const UT_Vector3 o)
void GU_SDF::setSize ( const UT_Vector3 s)
void GU_SDF::solveEikonalIterationFIMPartial ( UT_VoxelArrayF dst,
UT_Array< UT_Array< UT_Vector3I >> &  newlist,
UT_Array< bool > &  tileoccupied,
const UT_VoxelArrayF olddst,
const UT_Array< UT_Vector3I > &  activelist,
const fpreal  maxdist,
const fpreal  tolerance,
const UT_JobInfo info 
)
protected
GU_SDF::THREADED_METHOD1 ( GU_SDF  ,
activelist.  entries(),
100  ,
assignSolvableLabelsFIM  ,
const UT_Array< UT_Vector3I > &  ,
activelist   
)
protected
GU_SDF::THREADED_METHOD1 ( GU_SDF  ,
activelist.  entries(),
100  ,
removeSolvableLabelsFIM  ,
const UT_Array< UT_Vector3I > &  ,
activelist   
)
protected
GU_SDF::THREADED_METHOD2 ( GU_SDF  ,
myQueueIndices->  numTiles(),
20  ,
loadFinishedCellNeighboursFIM  ,
UT_Array< UT_Array< UT_Vector3I >> &  ,
newlist  ,
UT_Array< bool > &  ,
tileoccupied   
)
protected
GU_SDF::THREADED_METHOD2 ( GU_SDF  ,
myVoxels->  numTiles(),
16  ,
copyVolumeSamples  ,
const GU_Detail ,
gdp  ,
const UT_ValArray< const GEO_Primitive * > &  ,
volumes   
)
protected
GU_SDF::THREADED_METHOD3 ( GU_SDF  ,
occupied.  entries(),
100  ,
uncompressActiveTilesFIM  ,
UT_VoxelArrayF ,
olddst  ,
UT_VoxelArrayF ,
dst  ,
const UT_Array< bool > &  ,
occupied   
)
protected
GU_SDF::THREADED_METHOD5 ( GU_SDF  ,
src.  numTiles(),
20  ,
computeAndLabelZeroCrossingsFIM  ,
UT_VoxelArrayF ,
dst  ,
UT_VoxelArrayF ,
olddst  ,
const UT_VoxelArrayF ,
src  ,
const fpreal  ,
isocontour  ,
const fpreal  ,
maxdist   
)
protected
GU_SDF::THREADED_METHOD5 ( GU_SDF  ,
src.  numTiles(),
20  ,
buildVolumeZeroCrossings  ,
UT_Array< UT_Array< UT_Vector3I >> &  ,
crossingindices  ,
UT_Array< UT_Array< fpreal >> &  ,
crossingdists  ,
const UT_VoxelArrayF ,
src  ,
const fpreal  ,
isocontour  ,
const fpreal  ,
maxdist   
)
protected
GU_SDF::THREADED_METHOD7 ( GU_SDF  ,
activelist.  entries(),
100  ,
solveEikonalIterationFIM  ,
UT_VoxelArrayF ,
dst  ,
UT_Array< UT_Array< UT_Vector3I >> &  ,
newlist  ,
UT_Array< bool > &  ,
tileoccupied  ,
const UT_VoxelArrayF ,
olddst  ,
const UT_Array< UT_Vector3I > &  ,
activelist  ,
const fpreal  ,
maxdist  ,
const fpreal  ,
tolerance   
)
protected
void GU_SDF::uncompressActiveTilesFIMPartial ( UT_VoxelArrayF olddst,
UT_VoxelArrayF dst,
const UT_Array< bool > &  occupied,
const UT_JobInfo info 
)
protected
void GU_SDF::updateQElem ( gu_sdf_qelem qelem)
protected

If you change the weight of the qelem, this will update the queue.

Member Data Documentation

int GU_SDF::myHeightAxis
protected

Definition at line 711 of file GU_SDF.h.

GEO_PrimVolumeXform GU_SDF::myHeightXform
protected

Definition at line 710 of file GU_SDF.h.

UT_Vector3 GU_SDF::myImplicitNormal
protected

Definition at line 698 of file GU_SDF.h.

sdfImplicitType GU_SDF::myImplicitType
protected

What sort of implicit representation we are using. SDF_EXPLICIT if we have none.

Definition at line 696 of file GU_SDF.h.

bool GU_SDF::myInvert
protected

This flags whether we act as if our SDF had the opposite sign than it does.

Definition at line 702 of file GU_SDF.h.

fpreal GU_SDF::myOffset
protected

This defines how far we should shift the zero isosurface of the SDF.

Definition at line 704 of file GU_SDF.h.

UT_Vector3 GU_SDF::myOrig
protected

Real world coordinates are transformed into the voxel array's 0-1 space by subtracting myOrig and dividing by mySize.

Definition at line 708 of file GU_SDF.h.

gu_sdf_queue* GU_SDF::myQueue
protected

Definition at line 724 of file GU_SDF.h.

UT_ValArray<gu_sdf_qelem *> GU_SDF::myQueueElements
protected

Definition at line 722 of file GU_SDF.h.

UT_IntArray GU_SDF::myQueueFreeList
protected

Definition at line 723 of file GU_SDF.h.

UT_VoxelArray<int>* GU_SDF::myQueueIndices
protected

These are used in the building stage to rasterize to, and in the expansion stage as the priority queues.

Definition at line 721 of file GU_SDF.h.

UT_Vector3 GU_SDF::mySize
protected

Definition at line 708 of file GU_SDF.h.

fpreal GU_SDF::myVoxelDiameter
protected

This caches the diameter of a voxel cell. Ie, myVoxelSize.length()

Definition at line 717 of file GU_SDF.h.

UT_VoxelArrayF* GU_SDF::myVoxels
protected

This is the actual explicit array of voxels. It is not present if the SDF array is implicit. It does not incorporate the offset or inversion.

Definition at line 692 of file GU_SDF.h.

UT_Vector3 GU_SDF::myVoxelSize
protected

This stores the size of a voxel along each axis.

Definition at line 714 of file GU_SDF.h.


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