vtkExtractSelectedFrustum.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkExtractSelectedFrustum_h
#define vtkExtractSelectedFrustum_h
 
#include "vtkExtractSelectionBase.h"
#include "vtkFiltersGeneralModule.h" // For export macro
 
VTK_ABI_NAMESPACE_BEGIN
class vtkPlanes;
class vtkInformation;
class vtkInformationVector;
class vtkCell;
class vtkPoints;
class vtkDoubleArray;
 
class VTKFILTERSGENERAL_EXPORT vtkExtractSelectedFrustum : public vtkExtractSelectionBase
{
public:
  static vtkExtractSelectedFrustum* New();
  vtkTypeMacro(vtkExtractSelectedFrustum, vtkExtractSelectionBase);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  vtkMTimeType GetMTime() override;
 
 
  virtual void SetFrustum(vtkPlanes*);
  vtkGetObjectMacro(Frustum, vtkPlanes);
 
  void CreateFrustum(double vertices[32]);
 
 
  vtkGetObjectMacro(ClipPoints, vtkPoints);
 
 
  vtkSetMacro(FieldType, int);
  vtkGetMacro(FieldType, int);
 
 
  vtkSetMacro(ContainingCells, int);
  vtkGetMacro(ContainingCells, int);
 
  int OverallBoundsTest(double* bounds);
 
 
  vtkSetMacro(ShowBounds, vtkTypeBool);
  vtkGetMacro(ShowBounds, vtkTypeBool);
  vtkBooleanMacro(ShowBounds, vtkTypeBool);
 
 
  vtkSetMacro(InsideOut, vtkTypeBool);
  vtkGetMacro(InsideOut, vtkTypeBool);
  vtkBooleanMacro(InsideOut, vtkTypeBool);
 
protected:
  vtkExtractSelectedFrustum(vtkPlanes* f = nullptr);
  ~vtkExtractSelectedFrustum() override;
 
  // sets up output dataset
  int RequestDataObject(vtkInformation* request, vtkInformationVector** inputVector,
    vtkInformationVector* outputVector) override;
 
  // execution
  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
  int ABoxFrustumIsect(double bounds[], vtkCell* cell);
  int FrustumClipPolygon(int nverts, double* ivlist, double* wvlist, double* ovlist);
  void PlaneClipPolygon(int nverts, double* ivlist, int pid, int& noverts, double* ovlist);
  void PlaneClipEdge(double* V0, double* V1, int pid, int& noverts, double* overts);
  int IsectDegenerateCell(vtkCell* cell);
 
  // used in CreateFrustum
  void ComputePlane(
    int idx, double v0[3], double v1[3], double v2[3], vtkPoints* points, vtkDoubleArray* norms);
 
  // modes
  int FieldType;
  int ContainingCells;
  vtkTypeBool InsideOut;
 
  // used internally
  vtkPlanes* Frustum;
  int np_vertids[6][2];
 
  // for debugging
  vtkPoints* ClipPoints;
  int NumRejects;
  int NumIsects;
  int NumAccepts;
  vtkTypeBool ShowBounds;
 
private:
  vtkExtractSelectedFrustum(const vtkExtractSelectedFrustum&) = delete;
  void operator=(const vtkExtractSelectedFrustum&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif