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vtkGreedyTerrainDecimation.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkGreedyTerrainDecimation.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
70 #ifndef vtkGreedyTerrainDecimation_h
71 #define vtkGreedyTerrainDecimation_h
72 
73 #include "vtkFiltersHybridModule.h" // For export macro
74 #include "vtkPolyDataAlgorithm.h"
75 
76 class vtkPriorityQueue;
77 class vtkDataArray;
78 class vtkPointData;
79 class vtkIdList;
80 class vtkDoubleArray;
81 class vtkFloatArray;
82 
83 //PIMPL Encapsulation for STL containers
84 class vtkGreedyTerrainDecimationTerrainInfoType;
85 class vtkGreedyTerrainDecimationPointInfoType;
86 
87 #define VTK_ERROR_NUMBER_OF_TRIANGLES 0
88 #define VTK_ERROR_SPECIFIED_REDUCTION 1
89 #define VTK_ERROR_ABSOLUTE 2
90 #define VTK_ERROR_RELATIVE 3
91 
92 class VTKFILTERSHYBRID_EXPORT vtkGreedyTerrainDecimation : public vtkPolyDataAlgorithm
93 {
94 public:
96  void PrintSelf(ostream& os, vtkIndent indent);
97 
102 
104 
110  vtkSetClampMacro(ErrorMeasure,int,VTK_ERROR_NUMBER_OF_TRIANGLES,VTK_ERROR_RELATIVE);
111  vtkGetMacro(ErrorMeasure,int);
113  {this->SetErrorMeasure(VTK_ERROR_NUMBER_OF_TRIANGLES);}
115  {this->SetErrorMeasure(VTK_ERROR_SPECIFIED_REDUCTION);}
117  {this->SetErrorMeasure(VTK_ERROR_ABSOLUTE);}
119  {this->SetErrorMeasure(VTK_ERROR_RELATIVE);}
121 
123 
129  vtkSetClampMacro(NumberOfTriangles,vtkIdType,2,VTK_ID_MAX);
130  vtkGetMacro(NumberOfTriangles,vtkIdType);
132 
134 
139  vtkSetClampMacro(Reduction,double,0.0,1.0);
140  vtkGetMacro(Reduction,double);
142 
144 
149  vtkSetClampMacro(AbsoluteError,double,0.0,VTK_DOUBLE_MAX);
150  vtkGetMacro(AbsoluteError,double);
152 
154 
160  vtkSetClampMacro(RelativeError,double,0.0,VTK_DOUBLE_MAX);
161  vtkGetMacro(RelativeError,double);
163 
165 
169  vtkSetMacro(BoundaryVertexDeletion,int);
170  vtkGetMacro(BoundaryVertexDeletion,int);
171  vtkBooleanMacro(BoundaryVertexDeletion,int);
173 
175 
178  vtkSetMacro(ComputeNormals, int);
179  vtkGetMacro(ComputeNormals, int);
180  vtkBooleanMacro(ComputeNormals, int);
182 
183 protected:
186 
189 
192  void ComputePointNormal(int i, int j, float n[3]);
193 
194  //ivars that the API addresses
197  double Reduction;
200  int BoundaryVertexDeletion; //Can we delete boundary vertices?
201 
202  //Used for convenience
209  double Tolerance;
211  int Dimensions[3];
212  double Origin[3];
213  double Spacing[3];
215  double Length;
216 
217  //Bookeeping arrays
218  vtkPriorityQueue *TerrainError; //errors for each pt in height field
219  vtkGreedyTerrainDecimationTerrainInfoType *TerrainInfo; //owning triangle for each pt
220  vtkGreedyTerrainDecimationPointInfoType *PointInfo; //map mesh pt id to input pt id
221 
222  //Make a guess at initial allocation
223  void EstimateOutputSize(const vtkIdType numInputPts, vtkIdType &numPts, vtkIdType &numTris);
224 
225  //Returns non-zero if the error measure is satisfied.
226  virtual int SatisfiesErrorMeasure(double error);
227 
228  //Insert all the boundary vertices into the TIN
230 
231  //Insert a point into the triangulation; get a point from the triangulation
233  vtkIdType InsertNextPoint(vtkIdType inputPtId, double x[3]);
234  double *GetPoint(vtkIdType id);
235  void GetPoint(vtkIdType id, double x[3]);
236 
237  //Helper functions
238  void GetTerrainPoint(int i, int j, double x[3]);
239  void ComputeImageCoordinates(vtkIdType inputPtId, int ij[2]);
240  int InCircle (double x[3], double x1[3], double x2[3], double x3[3]);
241  vtkIdType FindTriangle(double x[3], vtkIdType ptIds[3], vtkIdType tri,
242  double tol, vtkIdType nei[3], vtkIdList *neighbors, int& status);
243  void CheckEdge(vtkIdType ptId, double x[3], vtkIdType p1, vtkIdType p2,
244  vtkIdType tri, int depth);
245 
246  void UpdateTriangles(vtkIdType meshPtId); //update all points connected to this point
248  void UpdateTriangle(vtkIdType triId, int ij1[2], int ij2[2], int ij3[2], double h[4]);
249 
250  int CharacterizeTriangle(int ij1[2], int ij2[2], int ij[3],
251  int* &min, int* &max, int* &midL, int* &midR,
252  int* &mid, int mid2[2], double h[3], double &hMin, double &hMax,
253  double &hL, double &hR);
254 
255 private:
256  vtkGreedyTerrainDecimation(const vtkGreedyTerrainDecimation&) VTK_DELETE_FUNCTION;
257  void operator=(const vtkGreedyTerrainDecimation&) VTK_DELETE_FUNCTION;
258 
259 };
260 
261 #endif
abstract superclass for arrays of numeric data
Definition: vtkDataArray.h:55
dynamic, self-adjusting array of double
dynamic, self-adjusting array of float
Definition: vtkFloatArray.h:42
reduce height field (represented as image) to reduced TIN
void ComputeImageCoordinates(vtkIdType inputPtId, int ij[2])
void UpdateTriangle(vtkIdType triId, vtkIdType p1, vtkIdType p2, vtkIdType p3)
void GetTerrainPoint(int i, int j, double x[3])
int CharacterizeTriangle(int ij1[2], int ij2[2], int ij[3], int *&min, int *&max, int *&midL, int *&midR, int *&mid, int mid2[2], double h[3], double &hMin, double &hMax, double &hL, double &hR)
void PrintSelf(ostream &os, vtkIndent indent)
Methods invoked by print to print information about the object including superclasses.
vtkGreedyTerrainDecimationTerrainInfoType * TerrainInfo
void ComputePointNormal(int i, int j, float n[3])
virtual int RequestData(vtkInformation *, vtkInformationVector **, vtkInformationVector *)
This is called by the superclass.
vtkIdType InsertNextPoint(vtkIdType inputPtId, double x[3])
vtkIdType AddPointToTriangulation(vtkIdType inputPtId)
vtkIdType FindTriangle(double x[3], vtkIdType ptIds[3], vtkIdType tri, double tol, vtkIdType nei[3], vtkIdList *neighbors, int &status)
void EstimateOutputSize(const vtkIdType numInputPts, vtkIdType &numPts, vtkIdType &numTris)
virtual int FillInputPortInformation(int port, vtkInformation *info)
Fill the input port information objects for this algorithm.
vtkGreedyTerrainDecimationPointInfoType * PointInfo
void GetPoint(vtkIdType id, double x[3])
void UpdateTriangle(vtkIdType triId, int ij1[2], int ij2[2], int ij3[2], double h[4])
static vtkGreedyTerrainDecimation * New()
Instantiate the class.
virtual int SatisfiesErrorMeasure(double error)
int InCircle(double x[3], double x1[3], double x2[3], double x3[3])
void CheckEdge(vtkIdType ptId, double x[3], vtkIdType p1, vtkIdType p2, vtkIdType tri, int depth)
void UpdateTriangles(vtkIdType meshPtId)
double * GetPoint(vtkIdType id)
list of point or cell ids
Definition: vtkIdList.h:37
a simple class to control print indentation
Definition: vtkIndent.h:40
Store zero or more vtkInformation instances.
Store vtkAlgorithm input/output information.
represent and manipulate point attribute data
Definition: vtkPointData.h:38
Superclass for algorithms that produce only polydata as output.
concrete dataset represents vertices, lines, polygons, and triangle strips
Definition: vtkPolyData.h:86
a list of ids arranged in priority order
@ info
Definition: vtkX3D.h:376
@ port
Definition: vtkX3D.h:447
#define VTK_ERROR_SPECIFIED_REDUCTION
#define VTK_ERROR_ABSOLUTE
#define VTK_ERROR_RELATIVE
#define VTK_ERROR_NUMBER_OF_TRIANGLES
vtkSetMacro(IgnoreDriverBugs, bool)
Updates the extensions string.
vtkBooleanMacro(IgnoreDriverBugs, bool)
Updates the extensions string.
int vtkIdType
Definition: vtkType.h:287
#define VTK_ID_MAX
Definition: vtkType.h:291
#define VTK_DOUBLE_MAX
Definition: vtkType.h:163
#define max(a, b)