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82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkCellCenterDepthSort.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/*
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* Copyright 2003 Sandia Corporation.
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* Under the terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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* license for use of this work by or on behalf of the
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* U.S. Government. Redistribution and use in source and binary forms, with
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* or without modification, are permitted provided that this Notice and any
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* statement of authorship are reproduced on all copies.
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*/
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/**
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* @class vtkCellCenterDepthSort
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* @brief A simple implementation of vtkCellDepthSort.
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*
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*
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* vtkCellCenterDepthSort is a simple and fast implementation of depth
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* sort, but it only provides approximate results. The sorting algorithm
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* finds the centroids of all the cells. It then performs the dot product
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* of the centroids against a vector pointing in the direction of the
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* camera transformed into object space. It then performs an ordinary sort
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* on the result.
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*
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*/
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#ifndef vtkCellCenterDepthSort_h
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#define vtkCellCenterDepthSort_h
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#include "vtkRenderingCoreModule.h" // For export macro
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#include "vtkVisibilitySort.h"
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class vtkFloatArray;
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class vtkCellCenterDepthSortStack;
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class VTKRENDERINGCORE_EXPORT vtkCellCenterDepthSort : public vtkVisibilitySort
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{
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public:
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vtkTypeMacro(vtkCellCenterDepthSort, vtkVisibilitySort);
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virtual void PrintSelf(ostream &os, vtkIndent indent);
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static vtkCellCenterDepthSort *New();
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virtual void InitTraversal();
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virtual vtkIdTypeArray *GetNextCells();
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protected:
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vtkCellCenterDepthSort();
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virtual ~vtkCellCenterDepthSort();
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vtkIdTypeArray *SortedCells;
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vtkIdTypeArray *SortedCellPartition;
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vtkFloatArray *CellCenters;
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vtkFloatArray *CellDepths;
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vtkFloatArray *CellPartitionDepths;
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virtual float *ComputeProjectionVector();
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virtual void ComputeCellCenters();
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virtual void ComputeDepths();
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private:
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vtkCellCenterDepthSortStack *ToSort;
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vtkCellCenterDepthSort(const vtkCellCenterDepthSort &) VTK_DELETE_FUNCTION;
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void operator=(const vtkCellCenterDepthSort &) VTK_DELETE_FUNCTION;
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};
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#endif
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