vtkPKdTree Class Reference

#include <vtkPKdTree.h>

Inheritance diagram for vtkPKdTree:

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List of all members.


Detailed Description

Build a k-d tree decomposition of a list of points.

Build, in parallel, a k-d tree decomposition of one or more vtkDataSets distributed across processors. We assume each process has read in one portion of a large distributed data set. When done, each process has access to the k-d tree structure, can obtain information about which process contains data for each spatial region, and can depth sort the spatial regions.

This class can also assign spatial regions to processors, based on one of several region assignment schemes. By default a contiguous, convex region is assigned to each process. Several queries return information about how many and what cells I have that lie in a region assigned to another process.

See also:
vtkKdTree

Definition at line 53 of file vtkPKdTree.h.


Public Types

typedef vtkKdTree Superclass

Public Member Functions

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
void PrintTiming (ostream &os, vtkIndent indent)
void PrintTables (ostream &os, vtkIndent indent)
void BuildLocator ()
vtkIdType GetTotalNumberOfCells ()
int CreateProcessCellCountData ()
int CreateGlobalDataArrayBounds ()
int AssignRegions (int *map, int numRegions)
int AssignRegionsRoundRobin ()
int AssignRegionsContiguous ()
int GetRegionAssignmentList (int procId, vtkIntArray *list)
int GetProcessAssignedToRegion (int regionId)
int HasData (int processId, int regionId)
int GetProcessCellCountForRegion (int processId, int regionId)
int GetTotalProcessesInRegion (int regionId)
int GetProcessListForRegion (int regionId, vtkIntArray *processes)
int GetProcessesCellCountForRegion (int regionId, int *count, int len)
int GetTotalRegionsForProcess (int processId)
int GetRegionListForProcess (int processId, vtkIntArray *regions)
int GetRegionsCellCountForProcess (int ProcessId, int *count, int len)
int GetCellArrayGlobalRange (const char *name, float range[2])
int GetPointArrayGlobalRange (const char *name, float range[2])
int GetCellArrayGlobalRange (const char *name, double range[2])
int GetPointArrayGlobalRange (const char *name, double range[2])
int GetCellArrayGlobalRange (int arrayIndex, double range[2])
int GetPointArrayGlobalRange (int arrayIndex, double range[2])
int GetCellArrayGlobalRange (int arrayIndex, float range[2])
int GetPointArrayGlobalRange (int arrayIndex, float range[2])
void SetController (vtkMultiProcessController *c)
virtual vtkMultiProcessControllerGetController ()
virtual int GetRegionAssignment ()
const int * GetRegionAssignmentMap ()
virtual int GetRegionAssignmentMapLength ()
void GetAllProcessesBorderingOnPoint (float x, float y, float z, vtkIntArray *list)
vtkIdType GetCellListsForProcessRegions (int ProcessId, int set, vtkIdList *inRegionCells, vtkIdList *onBoundaryCells)
vtkIdType GetCellListsForProcessRegions (int ProcessId, vtkDataSet *set, vtkIdList *inRegionCells, vtkIdList *onBoundaryCells)
vtkIdType GetCellListsForProcessRegions (int ProcessId, vtkIdList *inRegionCells, vtkIdList *onBoundaryCells)
int DepthOrderAllProcesses (double *directionOfProjection, vtkIntArray *orderedList)
int ViewOrderAllProcessesInDirection (const double directionOfProjection[3], vtkIntArray *orderedList)
int ViewOrderAllProcessesFromPosition (const double cameraPosition[3], vtkIntArray *orderedList)

Static Public Member Functions

static int IsTypeOf (const char *type)
static vtkPKdTreeSafeDownCast (vtkObject *o)
static vtkPKdTreeNew ()

Static Public Attributes

static const int NoRegionAssignment
static const int ContiguousAssignment
static const int UserDefinedAssignment
static const int RoundRobinAssignment

Protected Member Functions

 vtkPKdTree ()
 ~vtkPKdTree ()
void SingleProcessBuildLocator ()
int MultiProcessBuildLocator (double *bounds)

Member Typedef Documentation

Reimplemented from vtkKdTree.

Definition at line 56 of file vtkPKdTree.h.


Constructor & Destructor Documentation

vtkPKdTree::vtkPKdTree (  )  [protected]

vtkPKdTree::~vtkPKdTree (  )  [protected]


Member Function Documentation

virtual const char* vtkPKdTree::GetClassName (  )  [virtual]

Reimplemented from vtkKdTree.

static int vtkPKdTree::IsTypeOf ( const char *  name  )  [static]

Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkKdTree.

virtual int vtkPKdTree::IsA ( const char *  name  )  [virtual]

Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkKdTree.

static vtkPKdTree* vtkPKdTree::SafeDownCast ( vtkObject o  )  [static]

Reimplemented from vtkKdTree.

void vtkPKdTree::PrintSelf ( ostream &  os,
vtkIndent  indent 
) [virtual]

Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkKdTree.

void vtkPKdTree::PrintTiming ( ostream &  os,
vtkIndent  indent 
) [virtual]

Print timing of k-d tree build

Reimplemented from vtkKdTree.

void vtkPKdTree::PrintTables ( ostream &  os,
vtkIndent  indent 
)

static vtkPKdTree* vtkPKdTree::New (  )  [static]

Create an object with Debug turned off, modified time initialized to zero, and reference counting on.

Reimplemented from vtkKdTree.

void vtkPKdTree::BuildLocator (  )  [virtual]

Build the spatial decomposition. Call this explicitly after changing any parameters affecting the build of the tree. It must be called by all processes in the parallel application, or it will hang.

Reimplemented from vtkKdTree.

vtkIdType vtkPKdTree::GetTotalNumberOfCells (  )  [inline]

Get the total number of cells distributed across the data files read by all processes. You must have called BuildLocator before calling this method.

Definition at line 73 of file vtkPKdTree.h.

int vtkPKdTree::CreateProcessCellCountData (  ) 

Create tables of counts of cells per process per region. These tables can be accessed with queries like "HasData", "GetProcessCellCountForRegion", and so on. You must have called BuildLocator() beforehand. This method must be called by all processes or it will hang. Returns 1 on error, 0 when no error.

int vtkPKdTree::CreateGlobalDataArrayBounds (  ) 

A convenience function which compiles the global bounds of the data arrays across processes. These bounds can be accessed with "GetCellArrayGlobalRange" and "GetPointArrayGlobalRange". This method must be called by all processes or it will hang. Returns 1 on error, 0 when no error.

void vtkPKdTree::SetController ( vtkMultiProcessController c  ) 

Set/Get the communicator object

virtual vtkMultiProcessController* vtkPKdTree::GetController (  )  [virtual]

Set/Get the communicator object

virtual int vtkPKdTree::GetRegionAssignment (  )  [virtual]

The PKdTree class can assign spatial regions to processors after building the k-d tree, using one of several partitioning criteria. These functions Set/Get whether this assignment is computed. The default is "Off", no assignment is computed. If "On", and no assignment scheme is specified, contiguous assignment will be computed. Specifying an assignment scheme (with AssignRegions*()) automatically turns on RegionAssignment.

int vtkPKdTree::AssignRegions ( int *  map,
int  numRegions 
)

Assign spatial regions to processes via a user defined map. The user-supplied map is indexed by region ID, and provides a process ID for each region.

int vtkPKdTree::AssignRegionsRoundRobin (  ) 

Let the PKdTree class assign a process to each region in a round robin fashion. If the k-d tree has not yet been built, the regions will be assigned after BuildLocator executes.

int vtkPKdTree::AssignRegionsContiguous (  ) 

Let the PKdTree class assign a process to each region by assigning contiguous sets of spatial regions to each process. The set of regions assigned to each process will always have a union that is a convex space (a box). If the k-d tree has not yet been built, the regions will be assigned after BuildLocator executes.

const int* vtkPKdTree::GetRegionAssignmentMap (  )  [inline]

Returns the region assignment map where index is the region and value is the processes id for that region.

Definition at line 131 of file vtkPKdTree.h.

virtual int vtkPKdTree::GetRegionAssignmentMapLength (  )  [virtual]

/ Returns the number of regions in the region assignment map.

int vtkPKdTree::GetRegionAssignmentList ( int  procId,
vtkIntArray list 
)

Writes the list of region IDs assigned to the specified process. Regions IDs start at 0 and increase by 1 from there. Returns the number of regions in the list.

void vtkPKdTree::GetAllProcessesBorderingOnPoint ( float  x,
float  y,
float  z,
vtkIntArray list 
)

The k-d tree spatial regions have been assigned to processes. Given a point on the boundary of one of the regions, this method creates a list of all processes whose region boundaries include that point. This may be required when looking for processes that have cells adjacent to the cells of a given process.

int vtkPKdTree::GetProcessAssignedToRegion ( int  regionId  ) 

Returns the ID of the process assigned to the region.

int vtkPKdTree::HasData ( int  processId,
int  regionId 
)

Returns 1 if the process has data for the given region, 0 otherwise.

int vtkPKdTree::GetProcessCellCountForRegion ( int  processId,
int  regionId 
)

Returns the number of cells the specified process has in the specified region.

int vtkPKdTree::GetTotalProcessesInRegion ( int  regionId  ) 

Returns the total number of processes that have data falling within this spatial region.

int vtkPKdTree::GetProcessListForRegion ( int  regionId,
vtkIntArray processes 
)

Adds the list of processes having data for the given region to the supplied list, returns the number of processes added.

int vtkPKdTree::GetProcessesCellCountForRegion ( int  regionId,
int *  count,
int  len 
)

Writes the number of cells each process has for the region to the supplied list of length len. Returns the number of cell counts written. The order of the cell counts corresponds to the order of process IDs in the process list returned by GetProcessListForRegion.

int vtkPKdTree::GetTotalRegionsForProcess ( int  processId  ) 

Returns the total number of spatial regions that a given process has data for.

int vtkPKdTree::GetRegionListForProcess ( int  processId,
vtkIntArray regions 
)

Adds the region IDs for which this process has data to the supplied vtkIntArray. Retruns the number of regions.

int vtkPKdTree::GetRegionsCellCountForProcess ( int  ProcessId,
int *  count,
int  len 
)

Writes to the supplied integer array the number of cells this process has for each region. Returns the number of cell counts written. The order of the cell counts corresponds to the order of region IDs in the region list returned by GetRegionListForProcess.

vtkIdType vtkPKdTree::GetCellListsForProcessRegions ( int  ProcessId,
int  set,
vtkIdList inRegionCells,
vtkIdList onBoundaryCells 
)

After regions have been assigned to processes, I may want to know which cells I have that are in the regions assigned to a particular process. This method takes a process ID and two vtkIdLists. It writes to the first list the IDs of the cells contained in the process' regions. (That is, their cell centroid is contained in the region.) To the second list it write the IDs of the cells which intersect the process' regions but whose cell centroid lies elsewhere. The total number of cell IDs written to both lists is returned. Either list pointer passed in can be NULL, and it will be ignored. If there are multiple data sets, you must specify which data set you wish cell IDs for. The caller should delete these two lists when done. This method uses the cell lists created in vtkKdTree::CreateCellLists(). If the cell lists for the process' regions do not exist, this method will first build the cell lists for all regions by calling CreateCellLists(). You must remember to DeleteCellLists() when done with all calls to this method, as cell lists can require a great deal of memory.

vtkIdType vtkPKdTree::GetCellListsForProcessRegions ( int  ProcessId,
vtkDataSet set,
vtkIdList inRegionCells,
vtkIdList onBoundaryCells 
)

After regions have been assigned to processes, I may want to know which cells I have that are in the regions assigned to a particular process. This method takes a process ID and two vtkIdLists. It writes to the first list the IDs of the cells contained in the process' regions. (That is, their cell centroid is contained in the region.) To the second list it write the IDs of the cells which intersect the process' regions but whose cell centroid lies elsewhere. The total number of cell IDs written to both lists is returned. Either list pointer passed in can be NULL, and it will be ignored. If there are multiple data sets, you must specify which data set you wish cell IDs for. The caller should delete these two lists when done. This method uses the cell lists created in vtkKdTree::CreateCellLists(). If the cell lists for the process' regions do not exist, this method will first build the cell lists for all regions by calling CreateCellLists(). You must remember to DeleteCellLists() when done with all calls to this method, as cell lists can require a great deal of memory.

vtkIdType vtkPKdTree::GetCellListsForProcessRegions ( int  ProcessId,
vtkIdList inRegionCells,
vtkIdList onBoundaryCells 
)

After regions have been assigned to processes, I may want to know which cells I have that are in the regions assigned to a particular process. This method takes a process ID and two vtkIdLists. It writes to the first list the IDs of the cells contained in the process' regions. (That is, their cell centroid is contained in the region.) To the second list it write the IDs of the cells which intersect the process' regions but whose cell centroid lies elsewhere. The total number of cell IDs written to both lists is returned. Either list pointer passed in can be NULL, and it will be ignored. If there are multiple data sets, you must specify which data set you wish cell IDs for. The caller should delete these two lists when done. This method uses the cell lists created in vtkKdTree::CreateCellLists(). If the cell lists for the process' regions do not exist, this method will first build the cell lists for all regions by calling CreateCellLists(). You must remember to DeleteCellLists() when done with all calls to this method, as cell lists can require a great deal of memory.

int vtkPKdTree::DepthOrderAllProcesses ( double *  directionOfProjection,
vtkIntArray orderedList 
)

DO NOT CALL. Deprecated in VTK 5.2. Use ViewOrderAllProcessesInDirection or ViewOrderAllProcessesFromPosition.

int vtkPKdTree::ViewOrderAllProcessesInDirection ( const double  directionOfProjection[3],
vtkIntArray orderedList 
)

Return a list of all processes in order from front to back given a vector direction of projection. Use this to do visibility sorts in parallel projection mode. `orderedList' will be resized to the number of processes. The return value is the number of processes.

Precondition:
orderedList_exists: orderedList!=0

int vtkPKdTree::ViewOrderAllProcessesFromPosition ( const double  cameraPosition[3],
vtkIntArray orderedList 
)

Return a list of all processes in order from front to back given a camera position. Use this to do visibility sorts in perspective projection mode. `orderedList' will be resized to the number of processes. The return value is the number of processes.

Precondition:
orderedList_exists: orderedList!=0

int vtkPKdTree::GetCellArrayGlobalRange ( const char *  name,
float  range[2] 
)

An added feature of vtkPKdTree is that it will calculate the the global range of field arrays across all processes. You call CreateGlobalDataArrayBounds() to do this calculation. Then the following methods return the ranges. Returns 1 on error, 0 otherwise.

int vtkPKdTree::GetPointArrayGlobalRange ( const char *  name,
float  range[2] 
)

int vtkPKdTree::GetCellArrayGlobalRange ( const char *  name,
double  range[2] 
)

int vtkPKdTree::GetPointArrayGlobalRange ( const char *  name,
double  range[2] 
)

int vtkPKdTree::GetCellArrayGlobalRange ( int  arrayIndex,
double  range[2] 
)

int vtkPKdTree::GetPointArrayGlobalRange ( int  arrayIndex,
double  range[2] 
)

int vtkPKdTree::GetCellArrayGlobalRange ( int  arrayIndex,
float  range[2] 
)

int vtkPKdTree::GetPointArrayGlobalRange ( int  arrayIndex,
float  range[2] 
)

void vtkPKdTree::SingleProcessBuildLocator (  )  [protected]

int vtkPKdTree::MultiProcessBuildLocator ( double *  bounds  )  [protected]


Member Data Documentation

const int vtkPKdTree::NoRegionAssignment [static]

Definition at line 103 of file vtkPKdTree.h.

Definition at line 107 of file vtkPKdTree.h.

Definition at line 108 of file vtkPKdTree.h.

Definition at line 109 of file vtkPKdTree.h.


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

Generated on Wed Aug 24 11:55:08 2011 for VTK by  doxygen 1.5.6