a octree spatial decomposition of a set of points More...
#include <vtkOctreePointLocator.h>
Detailed Description
a octree spatial decomposition of a set of points
Given a vtkDataSetxs, create an octree that is locally refined such that all leaf octants contain less than a certain amount of points. Note that there is no size constraint that a leaf octant in relation to any of its neighbors.
This class can also generate a PolyData representation of the boundaries of the spatial regions in the decomposition.
- See also:
- vtkPointLocator vtkOctreePointLocatorNode
Definition at line 50 of file vtkOctreePointLocator.h.
Member Typedef Documentation
Reimplemented from vtkAbstractPointLocator.
Definition at line 53 of file vtkOctreePointLocator.h.
Constructor & Destructor Documentation
| vtkOctreePointLocator::vtkOctreePointLocator | ( | ) | [protected] |
| vtkOctreePointLocator::~vtkOctreePointLocator | ( | ) | [protected] |
| vtkOctreePointLocator::vtkOctreePointLocator | ( | const vtkOctreePointLocator & | ) | [protected] |
Member Function Documentation
| virtual const char* vtkOctreePointLocator::GetClassName | ( | ) | [virtual] |
Reimplemented from vtkAbstractPointLocator.
| static int vtkOctreePointLocator::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 vtkAbstractPointLocator.
| virtual int vtkOctreePointLocator::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 vtkAbstractPointLocator.
| static vtkOctreePointLocator* vtkOctreePointLocator::SafeDownCast | ( | vtkObject * | o | ) | [static] |
Reimplemented from vtkAbstractPointLocator.
| void vtkOctreePointLocator::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 vtkAbstractPointLocator.
| static vtkOctreePointLocator* vtkOctreePointLocator::New | ( | ) | [static] |
Create an object with Debug turned off, modified time initialized to zero, and reference counting on.
Reimplemented from vtkObject.
| virtual void vtkOctreePointLocator::SetMaximumPointsPerRegion | ( | int | ) | [virtual] |
Maximum number of points per spatial region. Default is 100.
| virtual int vtkOctreePointLocator::GetMaximumPointsPerRegion | ( | ) | [virtual] |
Maximum number of points per spatial region. Default is 100.
| virtual void vtkOctreePointLocator::SetCreateCubicOctants | ( | int | ) | [virtual] |
Get/Set macro for CreateCubicOctants.
| virtual int vtkOctreePointLocator::GetCreateCubicOctants | ( | ) | [virtual] |
Get/Set macro for CreateCubicOctants.
| virtual double vtkOctreePointLocator::GetFudgeFactor | ( | ) | [virtual] |
Some algorithms on octrees require a value that is a very small distance relative to the diameter of the entire space divided by the octree. This factor is the maximum axis-aligned width of the space multipled by 10e-6.
| virtual void vtkOctreePointLocator::SetFudgeFactor | ( | double | ) | [virtual] |
Some algorithms on octrees require a value that is a very small distance relative to the diameter of the entire space divided by the octree. This factor is the maximum axis-aligned width of the space multipled by 10e-6.
| virtual double* vtkOctreePointLocator::GetBounds | ( | ) | [virtual] |
Get the spatial bounds of the entire octree space. Sets bounds array to xmin, xmax, ymin, ymax, zmin, zmax.
Reimplemented from vtkAbstractPointLocator.
| virtual void vtkOctreePointLocator::GetBounds | ( | double * | bounds | ) | [virtual] |
Get the spatial bounds of the entire octree space. Sets bounds array to xmin, xmax, ymin, ymax, zmin, zmax.
Reimplemented from vtkAbstractPointLocator.
| virtual int vtkOctreePointLocator::GetNumberOfLeafNodes | ( | ) | [virtual] |
The number of leaf nodes of the tree, the spatial regions
Get the spatial bounds of octree region
Get the bounds of the data within the leaf node
Get the id of the leaf region containing the specified location.
| virtual void vtkOctreePointLocator::BuildLocator | ( | ) | [virtual] |
Create the octree decomposition of the cells of the data set or data sets. Cells are assigned to octree spatial regions based on the location of their centroids.
Implements vtkAbstractPointLocator.
Return the Id of the point that is closest to the given point. Set the square of the distance between the two points.
Implements vtkAbstractPointLocator.
Return the Id of the point that is closest to the given point. Set the square of the distance between the two points.
| virtual vtkIdType vtkOctreePointLocator::FindClosestPointWithinRadius | ( | double | radius, |
| const double | x[3], | ||
| double & | dist2 | ||
| ) | [virtual] |
Given a position x and a radius r, return the id of the point closest to the point in that radius. dist2 returns the squared distance to the point.
Implements vtkAbstractPointLocator.
| vtkIdType vtkOctreePointLocator::FindClosestPointInRegion | ( | int | regionId, |
| double * | x, | ||
| double & | dist2 | ||
| ) |
Find the Id of the point in the given leaf region which is closest to the given point. Return the ID of the point, and set the square of the distance of between the points.
| vtkIdType vtkOctreePointLocator::FindClosestPointInRegion | ( | int | regionId, |
| double | x, | ||
| double | y, | ||
| double | z, | ||
| double & | dist2 | ||
| ) |
Find the Id of the point in the given leaf region which is closest to the given point. Return the ID of the point, and set the square of the distance of between the points.
| virtual void vtkOctreePointLocator::FindPointsWithinRadius | ( | double | radius, |
| const double | x[3], | ||
| vtkIdList * | result | ||
| ) | [virtual] |
Find all points within a specified radius of position x. The result is not sorted in any specific manner.
Implements vtkAbstractPointLocator.
| void vtkOctreePointLocator::FindClosestNPoints | ( | int | N, |
| const double | x[3], | ||
| vtkIdList * | result | ||
| ) | [virtual] |
Find the closest N points to a position. This returns the closest N points to a position. A faster method could be created that returned N close points to a position, but not necessarily the exact N closest. The returned points are sorted from closest to farthest. These methods are thread safe if BuildLocator() is directly or indirectly called from a single thread first.
Implements vtkAbstractPointLocator.
| vtkIdTypeArray* vtkOctreePointLocator::GetPointsInRegion | ( | int | leafNodeId | ) |
Get a list of the original IDs of all points in a leaf node.
| virtual void vtkOctreePointLocator::FreeSearchStructure | ( | ) | [virtual] |
Delete the octree data structure.
Implements vtkAbstractPointLocator.
| void vtkOctreePointLocator::GenerateRepresentation | ( | int | level, |
| vtkPolyData * | pd | ||
| ) | [virtual] |
Create a polydata representation of the boundaries of the octree regions.
Implements vtkAbstractPointLocator.
| void vtkOctreePointLocator::FindPointsInArea | ( | double * | area, |
| vtkIdTypeArray * | ids, | ||
| bool | clearArray = true |
||
| ) |
Fill ids with points found in area. The area is a 6-tuple containing (xmin, xmax, ymin, ymax, zmin, zmax). This method will clear the array by default. To append ids to an array, set clearArray to false.
| void vtkOctreePointLocator::BuildLeafNodeList | ( | vtkOctreePointLocatorNode * | node, |
| int & | index | ||
| ) | [protected] |
| int vtkOctreePointLocator::FindRegion | ( | vtkOctreePointLocatorNode * | node, |
| float | x, | ||
| float | y, | ||
| float | z | ||
| ) | [protected] |
Given a point and a node return the leaf node id that contains the point. The function returns -1 if no nodes contain the point.
| int vtkOctreePointLocator::FindRegion | ( | vtkOctreePointLocatorNode * | node, |
| double | x, | ||
| double | y, | ||
| double | z | ||
| ) | [protected] |
Given a point and a node return the leaf node id that contains the point. The function returns -1 if no nodes contain the point.
| static void vtkOctreePointLocator::SetDataBoundsToSpatialBounds | ( | vtkOctreePointLocatorNode * | node | ) | [static, protected] |
| static void vtkOctreePointLocator::DeleteAllDescendants | ( | vtkOctreePointLocatorNode * | octant | ) | [static, protected] |
| void vtkOctreePointLocator::FindPointsWithinRadius | ( | vtkOctreePointLocatorNode * | node, |
| double | radiusSquared, | ||
| const double | x[3], | ||
| vtkIdList * | ids | ||
| ) | [protected] |
Recursive helper for public FindPointsWithinRadius. radiusSquared is the square of the radius and is used in order to avoid the expensive square root calculation.
| void vtkOctreePointLocator::AddAllPointsInRegion | ( | vtkOctreePointLocatorNode * | node, |
| vtkIdList * | ids | ||
| ) | [protected] |
| void vtkOctreePointLocator::FindPointsInArea | ( | vtkOctreePointLocatorNode * | node, |
| double * | area, | ||
| vtkIdTypeArray * | ids | ||
| ) | [protected] |
| void vtkOctreePointLocator::AddAllPointsInRegion | ( | vtkOctreePointLocatorNode * | node, |
| vtkIdTypeArray * | ids | ||
| ) | [protected] |
| void vtkOctreePointLocator::DivideRegion | ( | vtkOctreePointLocatorNode * | node, |
| int * | ordering, | ||
| int | level | ||
| ) | [protected] |
| void vtkOctreePointLocator::AddPolys | ( | vtkOctreePointLocatorNode * | node, |
| vtkPoints * | pts, | ||
| vtkCellArray * | polys | ||
| ) | [protected] |
| int vtkOctreePointLocator::_FindClosestPointInRegion | ( | int | leafNodeId, |
| double | x, | ||
| double | y, | ||
| double | z, | ||
| double & | dist2 | ||
| ) | [protected] |
Given a leaf node id and point, return the local id and the squared distance between the closest point and the given point.
| int vtkOctreePointLocator::FindClosestPointInSphere | ( | double | x, |
| double | y, | ||
| double | z, | ||
| double | radius, | ||
| int | skipRegion, | ||
| double & | dist2 | ||
| ) | [protected] |
Given a location and a radiues, find the closest point within this radius. The function does not examine the region with Id equal to skipRegion (do not set skipRegion to -1 as all non-leaf octants have -1 as their Id). The Id is returned along with the distance squared for success and -1 is returned for failure.
| void vtkOctreePointLocator::operator= | ( | const vtkOctreePointLocator & | ) | [protected] |
Member Data Documentation
vtkOctreePointLocatorNode* vtkOctreePointLocator::Top [protected] |
Definition at line 165 of file vtkOctreePointLocator.h.
vtkOctreePointLocatorNode** vtkOctreePointLocator::LeafNodeList [protected] |
Definition at line 166 of file vtkOctreePointLocator.h.
int vtkOctreePointLocator::MaximumPointsPerRegion [protected] |
The maximum number of points in a region/octant before it is subdivided.
Definition at line 227 of file vtkOctreePointLocator.h.
int vtkOctreePointLocator::NumberOfLeafNodes [protected] |
The maximum number of points in a region/octant before it is subdivided.
Definition at line 228 of file vtkOctreePointLocator.h.
double vtkOctreePointLocator::FudgeFactor [protected] |
Definition at line 231 of file vtkOctreePointLocator.h.
int vtkOctreePointLocator::NumberOfLocatorPoints [protected] |
Definition at line 232 of file vtkOctreePointLocator.h.
float* vtkOctreePointLocator::LocatorPoints [protected] |
Definition at line 233 of file vtkOctreePointLocator.h.
int* vtkOctreePointLocator::LocatorIds [protected] |
Definition at line 234 of file vtkOctreePointLocator.h.
float vtkOctreePointLocator::MaxWidth [protected] |
Definition at line 236 of file vtkOctreePointLocator.h.
int vtkOctreePointLocator::CreateCubicOctants [protected] |
If CreateCubicOctants is non-zero, the bounding box of the points will be expanded such that all octants that are created will be cube-shaped (e.g. have equal lengths on each side). This may make the tree deeper but also results in better shaped octants for doing searches. The default is to have this set on.
Definition at line 243 of file vtkOctreePointLocator.h.
The documentation for this class was generated from the following file:
- dox/Filtering/vtkOctreePointLocator.h
