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vtkInterpolatedVelocityField Class Reference
Interface for obtaining.
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#include <vtkInterpolatedVelocityField.h>
Inheritance diagram for vtkInterpolatedVelocityField:
[legend]Collaboration diagram for vtkInterpolatedVelocityField:
[legend]List of all members.
Detailed Description
Interface for obtaining.
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Date:
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2000/12/10 20:08:11
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Revision:
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1.6
interpolated velocity values
vtkInterpolatedVelocityField acts as a continuous velocity field by performing cell interpolation on the underlying vtkDataSet. This is a concrete sub-class of vtkFunctionSet with NumberOfIndependentVariables = 4 (x,y,z,t) and NumberOfFunctions = 3 (u,v,w). Normally, every time an evaluation is performed, the cell which contains the point (x,y,z) has to be found by calling FindCell. This is a computationally expansive operation. In certain cases, the cell search can be avoided or shortened by providing a guess for the cell id. For example, in streamline integration, the next evaluation is usually in the same or a neighbour cell. For this reason, vtkInterpolatedVelocityField stores the last cell id. If caching is turned on, it uses this id as the starting point.
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Warning:
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vtkInterpolatedVelocityField is not thread safe. A new instance should be created by each thread.
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See also:
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vtkFunctionSet vtkStreamer
Definition at line 74 of file vtkInterpolatedVelocityField.h.
Constructor & Destructor Documentation
| vtkInterpolatedVelocityField::vtkInterpolatedVelocityField |
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[protected] |
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| vtkInterpolatedVelocityField::~vtkInterpolatedVelocityField |
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| vtkInterpolatedVelocityField::vtkInterpolatedVelocityField |
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const vtkInterpolatedVelocityField & |
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[inline, protected] |
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Member Function Documentation
| virtual const char* vtkInterpolatedVelocityField::GetClassName |
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[virtual] |
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| int vtkInterpolatedVelocityField::IsTypeOf |
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const char * |
type |
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[static] |
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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 vtkFunctionSet. |
| virtual int vtkInterpolatedVelocityField::IsA |
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const char * |
type |
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[virtual] |
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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 vtkFunctionSet. |
| vtkInterpolatedVelocityField* vtkInterpolatedVelocityField::SafeDownCast |
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vtkObject * |
o |
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[static] |
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Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.
Reimplemented from vtkFunctionSet. |
| virtual void vtkInterpolatedVelocityField::PrintSelf |
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ostream & |
os, |
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vtkIndent |
indent |
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[virtual] |
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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 vtkFunctionSet. |
| vtkInterpolatedVelocityField* vtkInterpolatedVelocityField::New |
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[static] |
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Construct a vtkInterpolatedVelocityField with no initial data set. Caching is on. LastCellId is set to -1.
Reimplemented from vtkObject. |
| virtual int vtkInterpolatedVelocityField::FunctionValues |
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float * |
x, |
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float * |
f |
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[virtual] |
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Evaluate the velocity field, f, at (x, y, z, t). For now, t is ignored.
Reimplemented from vtkFunctionSet. |
| virtual void vtkInterpolatedVelocityField::SetDataSet |
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vtkDataSet * |
dataset |
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[virtual] |
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Set / get the dataset used for the implicit function evaluation. |
| virtual vtkDataSet* vtkInterpolatedVelocityField::GetDataSet |
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[virtual] |
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| virtual int vtkInterpolatedVelocityField::GetLastCellId |
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[virtual] |
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Return the cell id cached from last evaluation. |
| virtual void vtkInterpolatedVelocityField::SetLastCellId |
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int |
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[virtual] |
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| void vtkInterpolatedVelocityField::ClearLastCellId |
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[inline] |
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| int vtkInterpolatedVelocityField::GetLastWeights |
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float * |
w |
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Returns the interpolation weights cached from last evaluation if the cached cell is valid (returns 1). Otherwise, it does not change w and returns 0. |
| int vtkInterpolatedVelocityField::GetLastLocalCoordinates |
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float |
pcoords[3] |
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| virtual int vtkInterpolatedVelocityField::GetCaching |
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[virtual] |
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| virtual void vtkInterpolatedVelocityField::SetCaching |
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int |
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[virtual] |
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| virtual void vtkInterpolatedVelocityField::CachingOn |
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[virtual] |
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| virtual void vtkInterpolatedVelocityField::CachingOff |
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| virtual int vtkInterpolatedVelocityField::GetCacheHit |
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| virtual int vtkInterpolatedVelocityField::GetCacheMiss |
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| void vtkInterpolatedVelocityField::operator= |
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const vtkInterpolatedVelocityField & |
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[inline, protected] |
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Member Data Documentation
vtkDataSet* vtkInterpolatedVelocityField::DataSet [protected]
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float* vtkInterpolatedVelocityField::Weights [protected]
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float vtkInterpolatedVelocityField::LastPCoords[3] [protected]
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int vtkInterpolatedVelocityField::LastCellId [protected]
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int vtkInterpolatedVelocityField::CacheHit [protected]
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int vtkInterpolatedVelocityField::CacheMiss [protected]
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int vtkInterpolatedVelocityField::Caching [protected]
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The documentation for this class was generated from the following file:
Generated on Wed Nov 21 12:52:25 2001 for VTK by
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