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| virtual vtkTypeBool | IsA (const char *type) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| vtkFiniteDifferenceGradientEstimator * | NewInstance () const |
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| virtual void | SetSampleSpacingInVoxels (int) |
| | Set/Get the spacing between samples for the finite differences method used to compute the normal.
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| virtual int | GetSampleSpacingInVoxels () |
| | Set/Get the spacing between samples for the finite differences method used to compute the normal.
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| virtual vtkTypeBool | IsA (const char *type) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| vtkEncodedGradientEstimator * | NewInstance () const |
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| void | Update (void) |
| | Recompute the encoded normals and gradient magnitudes.
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| unsigned short * | GetEncodedNormals (void) |
| | Get the encoded normals.
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| unsigned char * | GetGradientMagnitudes (void) |
| | Get the gradient magnitudes.
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| virtual int | GetUseCylinderClip () |
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| int * | GetCircleLimits () |
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| virtual int * | GetInputSize () |
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| virtual void | GetInputSize (int data[3]) |
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| virtual float * | GetInputAspect () |
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| virtual void | GetInputAspect (float data[3]) |
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| virtual void | SetInputData (vtkImageData *) |
| | Set/Get the scalar input for which the normals will be calculated.
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| virtual vtkImageData * | GetInputData () |
| | Set/Get the scalar input for which the normals will be calculated.
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| virtual void | SetGradientMagnitudeScale (float) |
| | Set/Get the scale and bias for the gradient magnitude.
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| virtual float | GetGradientMagnitudeScale () |
| | Set/Get the scale and bias for the gradient magnitude.
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| virtual void | SetGradientMagnitudeBias (float) |
| | Set/Get the scale and bias for the gradient magnitude.
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| virtual float | GetGradientMagnitudeBias () |
| | Set/Get the scale and bias for the gradient magnitude.
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| virtual void | SetBoundsClip (vtkTypeBool) |
| | Turn on / off the bounding of the normal computation by the this->Bounds bounding box.
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| virtual vtkTypeBool | GetBoundsClip () |
| | Turn on / off the bounding of the normal computation by the this->Bounds bounding box.
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| virtual void | BoundsClipOn () |
| | Turn on / off the bounding of the normal computation by the this->Bounds bounding box.
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| virtual void | BoundsClipOff () |
| | Turn on / off the bounding of the normal computation by the this->Bounds bounding box.
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| virtual void | SetBounds (int, int, int, int, int, int) |
| | Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.
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| virtual void | SetBounds (int[6]) |
| | Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.
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| virtual int * | GetBounds () |
| | Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.
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| virtual void | GetBounds (int data[6]) |
| | Set / Get the bounds of the computation (used if this->ComputationBounds is 1.) The bounds are specified xmin, xmax, ymin, ymax, zmin, zmax.
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| int | GetEncodedNormalIndex (vtkIdType xyzIndex) |
| | Get the encoded normal at an x,y,z location in the volume.
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| int | GetEncodedNormalIndex (int xIndex, int yIndex, int zIndex) |
| | Get the encoded normal at an x,y,z location in the volume.
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| virtual void | SetNumberOfThreads (int) |
| | Get/Set the number of threads to create when encoding normals This defaults to the number of available processors on the machine.
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| virtual int | GetNumberOfThreads () |
| | Get/Set the number of threads to create when encoding normals This defaults to the number of available processors on the machine.
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| void | SetDirectionEncoder (vtkDirectionEncoder *direnc) |
| | Set / Get the direction encoder used to encode normal directions to fit within two bytes.
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| virtual vtkDirectionEncoder * | GetDirectionEncoder () |
| | Set / Get the direction encoder used to encode normal directions to fit within two bytes.
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| virtual void | SetComputeGradientMagnitudes (vtkTypeBool) |
| | If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used.
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| virtual vtkTypeBool | GetComputeGradientMagnitudes () |
| | If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used.
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| virtual void | ComputeGradientMagnitudesOn () |
| | If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used.
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| virtual void | ComputeGradientMagnitudesOff () |
| | If you don't want to compute gradient magnitudes (but you do want normals for shading) this can be used.
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| virtual void | SetCylinderClip (vtkTypeBool) |
| | If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle.
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| virtual vtkTypeBool | GetCylinderClip () |
| | If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle.
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| virtual void | CylinderClipOn () |
| | If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle.
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| virtual void | CylinderClipOff () |
| | If the data in each slice is only contained within a circle circumscribed within the slice, and the slice is square, then don't compute anything outside the circle.
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| virtual float | GetLastUpdateTimeInSeconds () |
| | Get the time required for the last update in seconds or cpu seconds.
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| virtual float | GetLastUpdateTimeInCPUSeconds () |
| | Get the time required for the last update in seconds or cpu seconds.
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| void | SetZeroNormalThreshold (float v) |
| | Set / Get the ZeroNormalThreshold - this defines the minimum magnitude of a gradient that is considered sufficient to define a direction.
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| virtual float | GetZeroNormalThreshold () |
| | Set / Get the ZeroNormalThreshold - this defines the minimum magnitude of a gradient that is considered sufficient to define a direction.
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| virtual void | SetZeroPad (vtkTypeBool) |
| | Assume that the data value outside the volume is zero when computing normals.
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| virtual vtkTypeBool | GetZeroPad () |
| | Assume that the data value outside the volume is zero when computing normals.
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| virtual void | ZeroPadOn () |
| | Assume that the data value outside the volume is zero when computing normals.
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| virtual void | ZeroPadOff () |
| | Assume that the data value outside the volume is zero when computing normals.
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| | vtkBaseTypeMacro (vtkObject, vtkObjectBase) |
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| virtual void | DebugOn () |
| | Turn debugging output on.
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| virtual void | DebugOff () |
| | Turn debugging output off.
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| bool | GetDebug () |
| | Get the value of the debug flag.
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| void | SetDebug (bool debugFlag) |
| | Set the value of the debug flag.
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| virtual void | Modified () |
| | Update the modification time for this object.
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| virtual vtkMTimeType | GetMTime () |
| | Return this object's modified time.
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| void | PrintSelf (ostream &os, vtkIndent indent) override |
| | Methods invoked by print to print information about the object including superclasses.
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| void | RemoveObserver (unsigned long tag) |
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| void | RemoveObservers (unsigned long event) |
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| void | RemoveObservers (const char *event) |
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| void | RemoveAllObservers () |
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| vtkTypeBool | HasObserver (unsigned long event) |
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| vtkTypeBool | HasObserver (const char *event) |
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| int | InvokeEvent (unsigned long event) |
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| int | InvokeEvent (const char *event) |
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| unsigned long | AddObserver (unsigned long event, vtkCommand *, float priority=0.0f) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| unsigned long | AddObserver (const char *event, vtkCommand *, float priority=0.0f) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| vtkCommand * | GetCommand (unsigned long tag) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| void | RemoveObserver (vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| void | RemoveObservers (unsigned long event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| void | RemoveObservers (const char *event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| vtkTypeBool | HasObserver (unsigned long event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| vtkTypeBool | HasObserver (const char *event, vtkCommand *) |
| | Allow people to add/remove/invoke observers (callbacks) to any VTK object.
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| 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.
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| template<class U , class T > |
| unsigned long | AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f) |
| | Overloads to AddObserver that allow developers to add class member functions as callbacks for events.
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| |
| 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.
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| int | InvokeEvent (unsigned long event, void *callData) |
| | This method invokes an event and return whether the event was aborted or not.
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| int | InvokeEvent (const char *event, void *callData) |
| | This method invokes an event and return whether the event was aborted or not.
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| const char * | GetClassName () const |
| | Return the class name as a string.
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| virtual vtkTypeBool | IsA (const char *name) |
| | Return 1 if this class is the same type of (or a subclass of) the named class.
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| virtual vtkIdType | GetNumberOfGenerationsFromBase (const char *name) |
| | Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class).
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| virtual void | Delete () |
| | Delete a VTK object.
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| virtual void | FastDelete () |
| | Delete a reference to this object.
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| void | InitializeObjectBase () |
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| void | Print (ostream &os) |
| | Print an object to an ostream.
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| virtual void | Register (vtkObjectBase *o) |
| | Increase the reference count (mark as used by another object).
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| virtual void | UnRegister (vtkObjectBase *o) |
| | Decrease the reference count (release by another object).
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| int | GetReferenceCount () |
| | Return the current reference count of this object.
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| void | SetReferenceCount (int) |
| | Sets the reference count.
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| bool | GetIsInMemkind () const |
| | A local state flag that remembers whether this object lives in the normal or extended memory space.
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| virtual void | PrintHeader (ostream &os, vtkIndent indent) |
| | Methods invoked by print to print information about the object including superclasses.
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| virtual void | PrintTrailer (ostream &os, vtkIndent indent) |
| | Methods invoked by print to print information about the object including superclasses.
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Use finite differences to estimate gradient.
vtkFiniteDifferenceGradientEstimator is a concrete subclass of vtkEncodedGradientEstimator that uses a central differences technique to estimate the gradient. The gradient at some sample location (x,y,z) would be estimated by:
nx = (f(x-dx,y,z) - f(x+dx,y,z)) / 2*dx;
ny = (f(x,y-dy,z) - f(x,y+dy,z)) / 2*dy;
nz = (f(x,y,z-dz) - f(x,y,z+dz)) / 2*dz;
This value is normalized to determine a unit direction vector and a magnitude. The normal is computed in voxel space, and dx = dy = dz = SampleSpacingInVoxels. A scaling factor is applied to convert this normal from voxel space to world coordinates.
- See also
- vtkEncodedGradientEstimator
- Online Examples:
Definition at line 64 of file vtkFiniteDifferenceGradientEstimator.h.
Public Types inherited from vtkEncodedGradientEstimator
1.9.6
