vtkParticleTracerBase.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkParticleTracerBase.h
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef vtkParticleTracerBase_h
#define vtkParticleTracerBase_h
 
#include "vtkFiltersFlowPathsModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
#include "vtkSmartPointer.h" // For protected ivars.
 
#include <list>   // STL Header
#include <vector> // STL Header
 
class vtkAbstractInterpolatedVelocityField;
class vtkAbstractParticleWriter;
class vtkCellArray;
class vtkCompositeDataSet;
class vtkDataArray;
class vtkDataSet;
class vtkDoubleArray;
class vtkFloatArray;
class vtkGenericCell;
class vtkInitialValueProblemSolver;
class vtkIntArray;
class vtkMultiBlockDataSet;
class vtkMultiProcessController;
class vtkPointData;
class vtkPoints;
class vtkPolyData;
class vtkSignedCharArray;
class vtkTemporalInterpolatedVelocityField;
 
namespace vtkParticleTracerBaseNamespace
{
struct Position_t
{
  double x[4];
};
using Position = struct Position_t;
 
struct ParticleInformation_t
{
  // These are used during iteration
  Position CurrentPosition;
  int CachedDataSetId[2];
  vtkIdType CachedCellId[2];
  int LocationState;
  // These are computed scalars we might display
  int SourceID;
  int TimeStepAge; // amount of time steps the particle has advanced
  int InjectedPointId;
  int InjectedStepId; // time step the particle was injected
  int UniqueParticleId;
  double SimulationTime;
  // These are useful to track for debugging etc
  int ErrorCode;
  float age;
  // these are needed across time steps to compute vorticity
  float rotation;
  float angularVel;
  float time;
  float speed;
  // once the partice is added, PointId is valid and is the tuple location
  // in ProtoPD.
  vtkIdType PointId;
  // if PointId is negative then in parallel this particle was just
  // received and we need to get the tuple value from vtkPParticleTracerBase::Tail.
  vtkIdType TailPointId;
};
using ParticleInformation = struct ParticleInformation_t;
 
typedef std::vector<ParticleInformation> ParticleVector;
typedef ParticleVector::iterator ParticleIterator;
typedef std::list<ParticleInformation> ParticleDataList;
typedef ParticleDataList::iterator ParticleListIterator;
};
 
class VTKFILTERSFLOWPATHS_EXPORT vtkParticleTracerBase : public vtkPolyDataAlgorithm
{
public:
  enum Solvers
  {
    RUNGE_KUTTA2,
    RUNGE_KUTTA4,
    RUNGE_KUTTA45,
    NONE,
    UNKNOWN
  };
 
  vtkTypeMacro(vtkParticleTracerBase, vtkPolyDataAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;
  void PrintParticleHistories();
 
 
  vtkGetMacro(ComputeVorticity, bool);
  void SetComputeVorticity(bool);
 
 
  vtkGetMacro(TerminalSpeed, double);
  void SetTerminalSpeed(double);
 
 
  vtkGetMacro(RotationScale, double);
  void SetRotationScale(double);
 
 
  vtkSetMacro(IgnorePipelineTime, vtkTypeBool);
  vtkGetMacro(IgnorePipelineTime, vtkTypeBool);
  vtkBooleanMacro(IgnorePipelineTime, vtkTypeBool);
 
 
  vtkGetMacro(ForceReinjectionEveryNSteps, int);
  void SetForceReinjectionEveryNSteps(int);
 
 
  void SetTerminationTime(double t);
  vtkGetMacro(TerminationTime, double);
 
  void SetIntegrator(vtkInitialValueProblemSolver*);
  vtkGetObjectMacro(Integrator, vtkInitialValueProblemSolver);
 
  void SetIntegratorType(int type);
  int GetIntegratorType();
 
 
  vtkGetMacro(StartTime, double);
  void SetStartTime(double t);
 
 
  vtkSetMacro(StaticSeeds, int);
  vtkGetMacro(StaticSeeds, int);
 
 
  vtkSetMacro(StaticMesh, int);
  vtkGetMacro(StaticMesh, int);
 
 
  virtual void SetParticleWriter(vtkAbstractParticleWriter* pw);
  vtkGetObjectMacro(ParticleWriter, vtkAbstractParticleWriter);
 
 
  vtkSetFilePathMacro(ParticleFileName);
  vtkGetFilePathMacro(ParticleFileName);
 
 
  vtkSetMacro(EnableParticleWriting, vtkTypeBool);
  vtkGetMacro(EnableParticleWriting, vtkTypeBool);
  vtkBooleanMacro(EnableParticleWriting, vtkTypeBool);
 
 
  vtkSetMacro(DisableResetCache, vtkTypeBool);
  vtkGetMacro(DisableResetCache, vtkTypeBool);
  vtkBooleanMacro(DisableResetCache, vtkTypeBool);
 
 
  void AddSourceConnection(vtkAlgorithmOutput* input);
  void RemoveAllSources();
 
protected:
  vtkSmartPointer<vtkPolyData> Output; // managed by child classes
 
  vtkSmartPointer<vtkPointData> ProtoPD;
  vtkIdType UniqueIdCounter; // global Id counter used to give particles a stamp
  vtkParticleTracerBaseNamespace::ParticleDataList ParticleHistories;
  vtkSmartPointer<vtkPointData> ParticlePointData; // the current particle point data consistent
                                                   // with particle history
  // Everything related to time
  vtkTypeBool IgnorePipelineTime; // whether to use the pipeline time for termination
  vtkTypeBool DisableResetCache;  // whether to enable ResetCache() method
 
  vtkParticleTracerBase();
  ~vtkParticleTracerBase() override;
 
  //
  // Make sure the pipeline knows what type we expect as input
  //
  int FillInputPortInformation(int port, vtkInformation* info) override;
 
  //
  // The usual suspects
  //
  vtkTypeBool ProcessRequest(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  //
  // Store any information we need in the output and fetch what we can
  // from the input
  //
  int RequestInformation(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  //
  // Compute input time steps given the output step
  //
  int RequestUpdateExtent(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  //
  // what the pipeline calls for each time step
  //
  int RequestData(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  //
  // these routines are internally called to actually generate the output
  //
  virtual int ProcessInput(vtkInformationVector** inputVector);
 
  // This is the main part of the algorithm:
  //  * move all the particles one step
  //  * Reinject particles (by adding them to this->ParticleHistories)
  //    either at the beginning or at the end of each step (modulo
  //    this->ForceReinjectionEveryNSteps)
  //  * Output a polydata representing the moved particles
  // Note that if the starting and the ending time coincide, the polydata is still valid.
  virtual vtkPolyData* Execute(vtkInformationVector** inputVector);
 
  // the RequestData will call these methods in turn
  virtual void Initialize() {}                        // the first iteration
  virtual int OutputParticles(vtkPolyData* poly) = 0; // every iteration
  virtual void Finalize() {}                          // the last iteration
 
  virtual std::vector<vtkDataSet*> GetSeedSources(vtkInformationVector* inputVector, int timeStep);
 
  //
  // Initialization of input (vector-field) geometry
  //
  int InitializeInterpolator();
  int UpdateDataCache(vtkDataObject* td);
 
  void TestParticles(vtkParticleTracerBaseNamespace::ParticleVector& candidates,
    vtkParticleTracerBaseNamespace::ParticleVector& passed, int& count);
 
  void TestParticles(
    vtkParticleTracerBaseNamespace::ParticleVector& candidates, std::vector<int>& passed);
 
  virtual void AssignSeedsToProcessors(double time, vtkDataSet* source, int sourceID, int ptId,
    vtkParticleTracerBaseNamespace::ParticleVector& localSeedPoints, int& localAssignedCount);
 
  virtual void AssignUniqueIds(vtkParticleTracerBaseNamespace::ParticleVector& localSeedPoints);
 
  void UpdateParticleList(vtkParticleTracerBaseNamespace::ParticleVector& candidates);
 
  virtual bool UpdateParticleListFromOtherProcesses() { return false; }
 
  void IntegrateParticle(vtkParticleTracerBaseNamespace::ParticleListIterator& it,
    double currenttime, double terminationtime, vtkInitialValueProblemSolver* integrator);
 
  // if the particle is added to send list, then returns value is 1,
  // if it is kept on this process after a retry return value is 0
  virtual bool SendParticleToAnotherProcess(vtkParticleTracerBaseNamespace::ParticleInformation&,
    vtkParticleTracerBaseNamespace::ParticleInformation&, vtkPointData*)
  {
    return true;
  }
 
  bool ComputeDomainExitLocation(
    double pos[4], double p2[4], double intersection[4], vtkGenericCell* cell);
 
  //
  // Scalar arrays that are generated as each particle is updated
  //
  void CreateProtoPD(vtkDataObject* input);
 
  vtkFloatArray* GetParticleAge(vtkPointData*);
  vtkIntArray* GetParticleIds(vtkPointData*);
  vtkSignedCharArray* GetParticleSourceIds(vtkPointData*);
  vtkIntArray* GetInjectedPointIds(vtkPointData*);
  vtkIntArray* GetInjectedStepIds(vtkPointData*);
  vtkIntArray* GetErrorCodeArr(vtkPointData*);
  vtkFloatArray* GetParticleVorticity(vtkPointData*);
  vtkFloatArray* GetParticleRotation(vtkPointData*);
  vtkFloatArray* GetParticleAngularVel(vtkPointData*);
 
  // utility function we use to test if a point is inside any of our local datasets
  bool InsideBounds(double point[]);
 
  void CalculateVorticity(
    vtkGenericCell* cell, double pcoords[3], vtkDoubleArray* cellVectors, double vorticity[3]);
 
  //------------------------------------------------------
 
  double GetCacheDataTime(int i);
  double GetCacheDataTime();
 
  virtual void ResetCache();
  void AddParticle(vtkParticleTracerBaseNamespace::ParticleInformation& info, double* velocity);
 
 
  virtual bool IsPointDataValid(vtkDataObject* input);
  bool IsPointDataValid(vtkCompositeDataSet* input, std::vector<std::string>& arrayNames);
  void GetPointDataArrayNames(vtkDataSet* input, std::vector<std::string>& names);
 
  vtkGetMacro(ReinjectionCounter, int);
  vtkGetMacro(CurrentTimeValue, double);
 
  virtual void InitializeExtraPointDataArrays(vtkPointData* vtkNotUsed(outputPD)) {}
 
  virtual void AppendToExtraPointDataArrays(vtkParticleTracerBaseNamespace::ParticleInformation&) {}
 
  vtkTemporalInterpolatedVelocityField* GetInterpolator();
 
  virtual void AddRestartSeeds(vtkInformationVector** /*inputVector*/) {}
 
private:
  void SetInterpolatorPrototype(vtkAbstractInterpolatedVelocityField*) {}
 
  bool RetryWithPush(vtkParticleTracerBaseNamespace::ParticleInformation& info, double* point1,
    double delT, int subSteps);
 
  bool SetTerminationTimeNoModify(double t);
 
  // Parameters of tracing
  vtkInitialValueProblemSolver* Integrator;
  double IntegrationStep;
  double MaximumError;
  bool ComputeVorticity;
  double RotationScale;
  double TerminalSpeed;
 
  // A counter to keep track of how many times we reinjected
  int ReinjectionCounter;
 
  // Important for Caching of Cells/Ids/Weights etc
  int AllFixedGeometry;
  int StaticMesh;
  int StaticSeeds;
 
  std::vector<double> InputTimeValues;
  double StartTime;
  double TerminationTime;
  double CurrentTimeValue;
 
  int StartTimeStep; // InputTimeValues[StartTimeStep] <= StartTime <=
                     // InputTimeValues[StartTimeStep+1]
  int CurrentTimeStep;
  int TerminationTimeStep; // computed from start time
  bool FirstIteration;
 
  // Innjection parameters
  int ForceReinjectionEveryNSteps;
  vtkTimeStamp ParticleInjectionTime;
  bool HasCache;
 
  // Particle writing to disk
  vtkAbstractParticleWriter* ParticleWriter;
  char* ParticleFileName;
  vtkTypeBool EnableParticleWriting;
 
  // The main lists which are held during operation- between time step updates
  vtkParticleTracerBaseNamespace::ParticleVector LocalSeeds;
 
  // The velocity interpolator
  vtkSmartPointer<vtkTemporalInterpolatedVelocityField> Interpolator;
  vtkAbstractInterpolatedVelocityField* InterpolatorPrototype;
 
  // Data for time step CurrentTimeStep-1 and CurrentTimeStep
  vtkSmartPointer<vtkMultiBlockDataSet> CachedData[2];
 
  // Cache bounds info for each dataset we will use repeatedly
  struct bounds_t
  {
    double b[6];
  };
  using bounds = struct bounds_t;
  std::vector<bounds> CachedBounds[2];
 
  // temporary variables used by Exeucte(), for convenience only
 
  vtkSmartPointer<vtkPoints> OutputCoordinates;
  vtkSmartPointer<vtkFloatArray> ParticleAge;
  vtkSmartPointer<vtkIntArray> ParticleIds;
  vtkSmartPointer<vtkSignedCharArray> ParticleSourceIds;
  vtkSmartPointer<vtkIntArray> InjectedPointIds;
  vtkSmartPointer<vtkIntArray> InjectedStepIds;
  vtkSmartPointer<vtkIntArray> ErrorCodeArray;
  vtkSmartPointer<vtkFloatArray> ParticleVorticity;
  vtkSmartPointer<vtkFloatArray> ParticleRotation;
  vtkSmartPointer<vtkFloatArray> ParticleAngularVel;
  vtkSmartPointer<vtkDoubleArray> CellVectors;
  vtkSmartPointer<vtkPointData> OutputPointData;
  vtkSmartPointer<vtkDataSet> DataReferenceT[2];
  vtkSmartPointer<vtkCellArray> ParticleCells;
 
  vtkParticleTracerBase(const vtkParticleTracerBase&) = delete;
  void operator=(const vtkParticleTracerBase&) = delete;
  vtkTimeStamp ExecuteTime;
 
  unsigned int NumberOfParticles();
 
  friend class ParticlePathFilterInternal;
  friend class StreaklineFilterInternal;
 
  static const double Epsilon;
};
 
#endif