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vtkOBBTree Class Reference

generate oriented bounding box (OBB) tree More...

#include <vtkOBBTree.h>

Inheritance diagram for vtkOBBTree:
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Collaboration diagram for vtkOBBTree:
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Public Types

typedef vtkAbstractCellLocator Superclass
 
- Public Types inherited from vtkAbstractCellLocator
typedef vtkLocator Superclass
 
- Public Types inherited from vtkLocator
typedef vtkObject Superclass
 Standard type and print methods. More...
 

Public Member Functions

virtual vtkTypeBool IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class. More...
 
vtkOBBTreeNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
int IntersectWithLine (const double a0[3], const double a1[3], vtkPoints *points, vtkIdList *cellIds) override
 Take the passed line segment and intersect it with the data set. More...
 
int IntersectWithLine (const double a0[3], const double a1[3], double tol, double &t, double x[3], double pcoords[3], int &subId, vtkIdType &cellId, vtkGenericCell *cell) override
 Return the first intersection of the specified line segment with the OBB tree, as well as information about the cell which the line segment intersected. More...
 
void ComputeOBB (vtkDataSet *input, double corner[3], double max[3], double mid[3], double min[3], double size[3])
 Compute an OBB for the input dataset using the cells in the data. More...
 
int InsideOrOutside (const double point[3])
 Determine whether a point is inside or outside the data used to build this OBB tree. More...
 
int DisjointOBBNodes (vtkOBBNode *nodeA, vtkOBBNode *nodeB, vtkMatrix4x4 *XformBtoA)
 Returns true if nodeB and nodeA are disjoint after optional transformation of nodeB with matrix XformBtoA. More...
 
int LineIntersectsNode (vtkOBBNode *pA, const double b0[3], const double b1[3])
 Returns true if line intersects node. More...
 
int TriangleIntersectsNode (vtkOBBNode *pA, double p0[3], double p1[3], double p2[3], vtkMatrix4x4 *XformBtoA)
 Returns true if triangle (optionally transformed) intersects node. More...
 
int IntersectWithOBBTree (vtkOBBTree *OBBTreeB, vtkMatrix4x4 *XformBtoA, int(*function)(vtkOBBNode *nodeA, vtkOBBNode *nodeB, vtkMatrix4x4 *Xform, void *arg), void *data_arg)
 For each intersecting leaf node pair, call function. More...
 
void FreeSearchStructure () override
 Satisfy locator's abstract interface, see vtkLocator. More...
 
void BuildLocator () override
 Build the locator from the input dataset. More...
 
void GenerateRepresentation (int level, vtkPolyData *pd) override
 Create polygonal representation for OBB tree at specified level. More...
 
virtual int IntersectWithLine (const double p1[3], const double p2[3], double tol, double &t, double x[3], double pcoords[3], int &subId)
 Return intersection point (if any) of finite line with cells contained in cell locator. More...
 
virtual int IntersectWithLine (const double p1[3], const double p2[3], double tol, double &t, double x[3], double pcoords[3], int &subId, vtkIdType &cellId)
 Return intersection point (if any) AND the cell which was intersected by the finite line. More...
 
virtual int IntersectWithLine (const double p1[3], const double p2[3], double tol, double &t, double x[3], double pcoords[3], int &subId, vtkIdType &cellId, vtkGenericCell *cell)
 Return intersection point (if any) AND the cell which was intersected by the finite line. More...
 
virtual int IntersectWithLine (const double p1[3], const double p2[3], vtkPoints *points, vtkIdList *cellIds)
 Take the passed line segment and intersect it with the data set. More...
 
- Public Member Functions inherited from vtkAbstractCellLocator
vtkAbstractCellLocatorNewInstance () const
 
virtual void SetNumberOfCellsPerNode (int)
 Specify the preferred/maximum number of cells in each node/bucket. More...
 
virtual int GetNumberOfCellsPerNode ()
 
virtual void SetCacheCellBounds (vtkTypeBool)
 Boolean controls whether the bounds of each cell are computed only once and then saved. More...
 
virtual vtkTypeBool GetCacheCellBounds ()
 
virtual void CacheCellBoundsOn ()
 
virtual void CacheCellBoundsOff ()
 
virtual void SetRetainCellLists (vtkTypeBool)
 Boolean controls whether to maintain list of cells in each node. More...
 
virtual vtkTypeBool GetRetainCellLists ()
 
virtual void RetainCellListsOn ()
 
virtual void RetainCellListsOff ()
 
virtual void SetLazyEvaluation (vtkTypeBool)
 Most Locators build their search structures during BuildLocator but some may delay construction until it is actually needed. More...
 
virtual vtkTypeBool GetLazyEvaluation ()
 
virtual void LazyEvaluationOn ()
 
virtual void LazyEvaluationOff ()
 
virtual void SetUseExistingSearchStructure (vtkTypeBool)
 Some locators support querying a new dataset without rebuilding the search structure (typically this may occur when a dataset changes due to a time update, but is actually the same topology) Turning on this flag enables some locators to skip the rebuilding phase. More...
 
virtual vtkTypeBool GetUseExistingSearchStructure ()
 
virtual void UseExistingSearchStructureOn ()
 
virtual void UseExistingSearchStructureOff ()
 
virtual int IntersectWithLine (const double p1[3], const double p2[3], double tol, double &t, double x[3], double pcoords[3], int &subId)
 Return intersection point (if any) of finite line with cells contained in cell locator. More...
 
virtual int IntersectWithLine (const double p1[3], const double p2[3], double tol, double &t, double x[3], double pcoords[3], int &subId, vtkIdType &cellId)
 Return intersection point (if any) AND the cell which was intersected by the finite line. More...
 
virtual void FindClosestPoint (const double x[3], double closestPoint[3], vtkIdType &cellId, int &subId, double &dist2)
 Return the closest point and the cell which is closest to the point x. More...
 
virtual void FindClosestPoint (const double x[3], double closestPoint[3], vtkGenericCell *cell, vtkIdType &cellId, int &subId, double &dist2)
 Return the closest point and the cell which is closest to the point x. More...
 
virtual vtkIdType FindClosestPointWithinRadius (double x[3], double radius, double closestPoint[3], vtkIdType &cellId, int &subId, double &dist2)
 Return the closest point within a specified radius and the cell which is closest to the point x. More...
 
virtual vtkIdType FindClosestPointWithinRadius (double x[3], double radius, double closestPoint[3], vtkGenericCell *cell, vtkIdType &cellId, int &subId, double &dist2)
 Return the closest point within a specified radius and the cell which is closest to the point x. More...
 
virtual vtkIdType FindClosestPointWithinRadius (double x[3], double radius, double closestPoint[3], vtkGenericCell *cell, vtkIdType &cellId, int &subId, double &dist2, int &inside)
 Return the closest point within a specified radius and the cell which is closest to the point x. More...
 
virtual void FindCellsWithinBounds (double *bbox, vtkIdList *cells)
 Return a list of unique cell ids inside of a given bounding box. More...
 
virtual void FindCellsAlongLine (const double p1[3], const double p2[3], double tolerance, vtkIdList *cells)
 Given a finite line defined by the two points (p1,p2), return the list of unique cell ids in the buckets containing the line. More...
 
virtual vtkIdType FindCell (double x[3])
 Returns the Id of the cell containing the point, returns -1 if no cell found. More...
 
virtual vtkIdType FindCell (double x[3], double tol2, vtkGenericCell *GenCell, double pcoords[3], double *weights)
 Find the cell containing a given point. More...
 
virtual bool InsideCellBounds (double x[3], vtkIdType cell_ID)
 Quickly test if a point is inside the bounds of a particular cell. More...
 
- Public Member Functions inherited from vtkLocator
vtkLocatorNewInstance () const
 
virtual void SetDataSet (vtkDataSet *)
 Build the locator from the points/cells defining this dataset. More...
 
virtual vtkDataSetGetDataSet ()
 
virtual void SetMaxLevel (int)
 Set the maximum allowable level for the tree. More...
 
virtual int GetMaxLevel ()
 
virtual int GetLevel ()
 Get the level of the locator (determined automatically if Automatic is true). More...
 
virtual void SetAutomatic (vtkTypeBool)
 Boolean controls whether locator depth/resolution of locator is computed automatically from average number of entities in bucket. More...
 
virtual vtkTypeBool GetAutomatic ()
 
virtual void AutomaticOn ()
 
virtual void AutomaticOff ()
 
virtual void SetTolerance (double)
 Specify absolute tolerance (in world coordinates) for performing geometric operations. More...
 
virtual double GetTolerance ()
 
virtual void Update ()
 Cause the locator to rebuild itself if it or its input dataset has changed. More...
 
virtual void Initialize ()
 Initialize locator. More...
 
virtual vtkMTimeType GetBuildTime ()
 Return the time of the last data structure build. More...
 
void Register (vtkObjectBase *o) override
 Handle the PointSet <-> Locator loop. More...
 
void UnRegister (vtkObjectBase *o) override
 Decrease the reference count (release by another object). More...
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on. More...
 
virtual void DebugOff ()
 Turn debugging output off. More...
 
bool GetDebug ()
 Get the value of the debug flag. More...
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag. More...
 
virtual void Modified ()
 Update the modification time for this object. More...
 
virtual vtkMTimeType GetMTime ()
 Return this object's modified time. More...
 
unsigned long AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
 
vtkCommandGetCommand (unsigned long tag)
 
void RemoveObserver (vtkCommand *)
 
void RemoveObservers (unsigned long event, vtkCommand *)
 
void RemoveObservers (const char *event, vtkCommand *)
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 
void RemoveObserver (unsigned long tag)
 
void RemoveObservers (unsigned long event)
 
void RemoveObservers (const char *event)
 
void RemoveAllObservers ()
 
vtkTypeBool HasObserver (unsigned long event)
 
vtkTypeBool HasObserver (const char *event)
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
 Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 Allow user to set the AbortFlagOn() with the return value of the callback method. More...
 
int InvokeEvent (unsigned long event, void *callData)
 This method invokes an event and return whether the event was aborted or not. More...
 
int InvokeEvent (const char *event, void *callData)
 
int InvokeEvent (unsigned long event)
 
int InvokeEvent (const char *event)
 
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
 Return the class name as a string. More...
 
virtual void Delete ()
 Delete a VTK object. More...
 
virtual void FastDelete ()
 Delete a reference to this object. More...
 
void InitializeObjectBase ()
 
void Print (ostream &os)
 Print an object to an ostream. More...
 
virtual void PrintHeader (ostream &os, vtkIndent indent)
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 
int GetReferenceCount ()
 Return the current reference count of this object. More...
 
void SetReferenceCount (int)
 Sets the reference count. More...
 
void PrintRevisions (ostream &)
 Legacy. More...
 

Static Public Member Functions

static vtkTypeBool IsTypeOf (const char *type)
 
static vtkOBBTreeSafeDownCast (vtkObjectBase *o)
 
static vtkOBBTreeNew ()
 Construct with automatic computation of divisions, averaging 25 cells per octant. More...
 
static void ComputeOBB (vtkPoints *pts, double corner[3], double max[3], double mid[3], double min[3], double size[3])
 Compute an OBB from the list of points given. More...
 
- Static Public Member Functions inherited from vtkAbstractCellLocator
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkAbstractCellLocatorSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkLocator
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkLocatorSafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 
static void BreakOnError ()
 This method is called when vtkErrorMacro executes. More...
 
static void SetGlobalWarningDisplay (int val)
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
static void GlobalWarningDisplayOn ()
 
static void GlobalWarningDisplayOff ()
 
static int GetGlobalWarningDisplay ()
 
- Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool IsTypeOf (const char *name)
 Return 1 if this class type is the same type of (or a subclass of) the named class. More...
 
static vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkOBBTree ()
 
 ~vtkOBBTree () override
 
void ComputeOBB (vtkIdList *cells, double corner[3], double max[3], double mid[3], double min[3], double size[3])
 
void BuildTree (vtkIdList *cells, vtkOBBNode *parent, int level)
 
void DeleteTree (vtkOBBNode *OBBptr)
 
void GeneratePolygons (vtkOBBNode *OBBptr, int level, int repLevel, vtkPoints *pts, vtkCellArray *polys)
 
- Protected Member Functions inherited from vtkAbstractCellLocator
 vtkAbstractCellLocator ()
 
 ~vtkAbstractCellLocator () override
 
virtual bool StoreCellBounds ()
 This command is used internally by the locator to copy all cell Bounds into the internal CellBounds array. More...
 
virtual void FreeCellBounds ()
 
- Protected Member Functions inherited from vtkLocator
 vtkLocator ()
 
 ~vtkLocator () override
 
void ReportReferences (vtkGarbageCollector *) override
 
- Protected Member Functions inherited from vtkObject
 vtkObject ()
 
 ~vtkObject () override
 
void RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr)
 These methods allow a command to exclusively grab all events. More...
 
void InternalReleaseFocus ()
 
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
 
virtual ~vtkObjectBase ()
 
virtual void CollectRevisions (ostream &)
 
 vtkObjectBase (const vtkObjectBase &)
 
void operator= (const vtkObjectBase &)
 

Protected Attributes

vtkOBBNodeTree
 
vtkPointsPointsList
 
int * InsertedPoints
 
int OBBCount
 
- Protected Attributes inherited from vtkAbstractCellLocator
int NumberOfCellsPerNode
 
vtkTypeBool RetainCellLists
 
vtkTypeBool CacheCellBounds
 
vtkTypeBool LazyEvaluation
 
vtkTypeBool UseExistingSearchStructure
 
vtkGenericCellGenericCell
 
double(* CellBounds )[6]
 
- Protected Attributes inherited from vtkLocator
vtkDataSetDataSet
 
vtkTypeBool Automatic
 
double Tolerance
 
int MaxLevel
 
int Level
 
vtkTimeStamp BuildTime
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

Detailed Description

generate oriented bounding box (OBB) tree

vtkOBBTree is an object to generate oriented bounding box (OBB) trees. An oriented bounding box is a bounding box that does not necessarily line up along coordinate axes. The OBB tree is a hierarchical tree structure of such boxes, where deeper levels of OBB confine smaller regions of space.

To build the OBB, a recursive, top-down process is used. First, the root OBB is constructed by finding the mean and covariance matrix of the cells (and their points) that define the dataset. The eigenvectors of the covariance matrix are extracted, giving a set of three orthogonal vectors that define the tightest-fitting OBB. To create the two children OBB's, a split plane is found that (approximately) divides the number cells in half. These are then assigned to the children OBB's. This process then continues until the MaxLevel ivar limits the recursion, or no split plane can be found.

A good reference for OBB-trees is Gottschalk & Manocha in Proceedings of Siggraph `96.

Warning
Since this algorithms works from a list of cells, the OBB tree will only bound the "geometry" attached to the cells if the convex hull of the cells bounds the geometry.
Long, skinny cells (i.e., cells with poor aspect ratio) may cause unsatisfactory results. This is due to the fact that this is a top-down implementation of the OBB tree, requiring that one or more complete cells are contained in each OBB. This requirement makes it hard to find good split planes during the recursion process. A bottom-up implementation would go a long way to correcting this problem.
See also
vtkLocator vtkCellLocator vtkPointLocator

Definition at line 85 of file vtkOBBTree.h.

Member Typedef Documentation

◆ Superclass

Definition at line 88 of file vtkOBBTree.h.

Constructor & Destructor Documentation

◆ vtkOBBTree()

vtkOBBTree::vtkOBBTree ( )
protected

◆ ~vtkOBBTree()

vtkOBBTree::~vtkOBBTree ( )
overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkOBBTree::IsTypeOf ( const char *  type)
static

◆ IsA()

virtual vtkTypeBool vtkOBBTree::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 vtkAbstractCellLocator.

◆ SafeDownCast()

static vtkOBBTree* vtkOBBTree::SafeDownCast ( vtkObjectBase o)
static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkOBBTree::NewInstanceInternal ( ) const
protectedvirtual

Reimplemented from vtkAbstractCellLocator.

◆ NewInstance()

vtkOBBTree* vtkOBBTree::NewInstance ( ) const

◆ PrintSelf()

void vtkOBBTree::PrintSelf ( ostream &  os,
vtkIndent  indent 
)
overridevirtual

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 vtkAbstractCellLocator.

◆ New()

static vtkOBBTree* vtkOBBTree::New ( )
static

Construct with automatic computation of divisions, averaging 25 cells per octant.

◆ IntersectWithLine() [1/6]

int vtkOBBTree::IntersectWithLine ( const double  a0[3],
const double  a1[3],
vtkPoints points,
vtkIdList cellIds 
)
overridevirtual

Take the passed line segment and intersect it with the data set.

This method assumes that the data set is a vtkPolyData that describes a closed surface, and the intersection points that are returned in 'points' alternate between entrance points and exit points. The return value of the function is 0 if no intersections were found, -1 if point 'a0' lies inside the closed surface, or +1 if point 'a0' lies outside the closed surface. Either 'points' or 'cellIds' can be set to nullptr if you don't want to receive that information.

Reimplemented from vtkAbstractCellLocator.

◆ IntersectWithLine() [2/6]

int vtkOBBTree::IntersectWithLine ( const double  a0[3],
const double  a1[3],
double  tol,
double &  t,
double  x[3],
double  pcoords[3],
int &  subId,
vtkIdType cellId,
vtkGenericCell cell 
)
overridevirtual

Return the first intersection of the specified line segment with the OBB tree, as well as information about the cell which the line segment intersected.

A return value of 1 indicates an intersection and 0 indicates no intersection.

Reimplemented from vtkAbstractCellLocator.

◆ ComputeOBB() [1/3]

static void vtkOBBTree::ComputeOBB ( vtkPoints pts,
double  corner[3],
double  max[3],
double  mid[3],
double  min[3],
double  size[3] 
)
static

Compute an OBB from the list of points given.

Return the corner point and the three axes defining the orientation of the OBB. Also return a sorted list of relative "sizes" of axes for comparison purposes.

◆ ComputeOBB() [2/3]

void vtkOBBTree::ComputeOBB ( vtkDataSet input,
double  corner[3],
double  max[3],
double  mid[3],
double  min[3],
double  size[3] 
)

Compute an OBB for the input dataset using the cells in the data.

Return the corner point and the three axes defining the orientation of the OBB. Also return a sorted list of relative "sizes" of axes for comparison purposes.

◆ InsideOrOutside()

int vtkOBBTree::InsideOrOutside ( const double  point[3])

Determine whether a point is inside or outside the data used to build this OBB tree.

The data must be a closed surface vtkPolyData data set. The return value is +1 if outside, -1 if inside, and 0 if undecided.

◆ DisjointOBBNodes()

int vtkOBBTree::DisjointOBBNodes ( vtkOBBNode nodeA,
vtkOBBNode nodeB,
vtkMatrix4x4 XformBtoA 
)

Returns true if nodeB and nodeA are disjoint after optional transformation of nodeB with matrix XformBtoA.

◆ LineIntersectsNode()

int vtkOBBTree::LineIntersectsNode ( vtkOBBNode pA,
const double  b0[3],
const double  b1[3] 
)

Returns true if line intersects node.

◆ TriangleIntersectsNode()

int vtkOBBTree::TriangleIntersectsNode ( vtkOBBNode pA,
double  p0[3],
double  p1[3],
double  p2[3],
vtkMatrix4x4 XformBtoA 
)

Returns true if triangle (optionally transformed) intersects node.

◆ IntersectWithOBBTree()

int vtkOBBTree::IntersectWithOBBTree ( vtkOBBTree OBBTreeB,
vtkMatrix4x4 XformBtoA,
int(*)(vtkOBBNode *nodeA, vtkOBBNode *nodeB, vtkMatrix4x4 *Xform, void *arg)  function,
void *  data_arg 
)

For each intersecting leaf node pair, call function.

OBBTreeB is optionally transformed by XformBtoA before testing.

◆ FreeSearchStructure()

void vtkOBBTree::FreeSearchStructure ( )
overridevirtual

Satisfy locator's abstract interface, see vtkLocator.

Implements vtkLocator.

◆ BuildLocator()

void vtkOBBTree::BuildLocator ( )
overridevirtual

Build the locator from the input dataset.

Implements vtkLocator.

◆ GenerateRepresentation()

void vtkOBBTree::GenerateRepresentation ( int  level,
vtkPolyData pd 
)
overridevirtual

Create polygonal representation for OBB tree at specified level.

If level < 0, then the leaf OBB nodes will be gathered. The aspect ratio (ar) and line diameter (d) are used to control the building of the representation. If a OBB node edge ratio's are greater than ar, then the dimension of the OBB is collapsed (OBB->plane->line). A "line" OBB will be represented either as two crossed polygons, or as a line, depending on the relative diameter of the OBB compared to the diameter (d).

Implements vtkLocator.

◆ ComputeOBB() [3/3]

void vtkOBBTree::ComputeOBB ( vtkIdList cells,
double  corner[3],
double  max[3],
double  mid[3],
double  min[3],
double  size[3] 
)
protected

◆ BuildTree()

void vtkOBBTree::BuildTree ( vtkIdList cells,
vtkOBBNode parent,
int  level 
)
protected

◆ DeleteTree()

void vtkOBBTree::DeleteTree ( vtkOBBNode OBBptr)
protected

◆ GeneratePolygons()

void vtkOBBTree::GeneratePolygons ( vtkOBBNode OBBptr,
int  level,
int  repLevel,
vtkPoints pts,
vtkCellArray polys 
)
protected

◆ IntersectWithLine() [3/6]

virtual int vtkAbstractCellLocator::IntersectWithLine

Return intersection point (if any) of finite line with cells contained in cell locator.

See vtkCell.h parameters documentation.

◆ IntersectWithLine() [4/6]

virtual int vtkAbstractCellLocator::IntersectWithLine

Return intersection point (if any) AND the cell which was intersected by the finite line.

◆ IntersectWithLine() [5/6]

virtual int vtkAbstractCellLocator::IntersectWithLine

Return intersection point (if any) AND the cell which was intersected by the finite line.

The cell is returned as a cell id and as a generic cell.

◆ IntersectWithLine() [6/6]

virtual int vtkAbstractCellLocator::IntersectWithLine

Take the passed line segment and intersect it with the data set.

This method assumes that the data set is a vtkPolyData that describes a closed surface, and the intersection points that are returned in 'points' alternate between entrance points and exit points. The return value of the function is 0 if no intersections were found, -1 if point 'a0' lies inside the closed surface, or +1 if point 'a0' lies outside the closed surface. Either 'points' or 'cellIds' can be set to nullptr if you don't want to receive that information. This method is currently only implemented in vtkOBBTree.

Member Data Documentation

◆ Tree

vtkOBBNode* vtkOBBTree::Tree
protected

Definition at line 201 of file vtkOBBTree.h.

◆ PointsList

vtkPoints* vtkOBBTree::PointsList
protected

Definition at line 203 of file vtkOBBTree.h.

◆ InsertedPoints

int* vtkOBBTree::InsertedPoints
protected

Definition at line 204 of file vtkOBBTree.h.

◆ OBBCount

int vtkOBBTree::OBBCount
protected

Definition at line 205 of file vtkOBBTree.h.


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