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144 lines
4.0 KiB
C++
144 lines
4.0 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkGeoGraticule.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 2008 Sandia Corporation.
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Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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the U.S. Government retains certain rights in this software.
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-------------------------------------------------------------------------*/
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/**
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* @class vtkGeoGraticule
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* @brief Create a polygonal lat-long grid
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*
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*
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* This filter generates polydata to illustrate the distortions introduced
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* by a map projection. The level parameter specifies the number of lines
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* to be drawn. Poles are treated differently than other regions; hence the
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* use of a Level parameter instead of a NumberOfLines parameter.
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* The latitude and longitude are specified as half-open intervals with units
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* of degrees. By default the latitude bounds are [-90,90[ and the longitude
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* bounds are [0,180[.
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*/
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#ifndef vtkGeoGraticule_h
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#define vtkGeoGraticule_h
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#include "vtkGeovisCoreModule.h" // For export macro
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#include "vtkPolyDataAlgorithm.h"
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class vtkPolyData;
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class VTKGEOVISCORE_EXPORT vtkGeoGraticule : public vtkPolyDataAlgorithm
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{
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public:
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static vtkGeoGraticule* New();
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virtual void PrintSelf( ostream& os, vtkIndent indent );
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vtkTypeMacro(vtkGeoGraticule,vtkPolyDataAlgorithm);
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//@{
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/**
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* The latitude bounds of the graticule.
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*/
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vtkSetVector2Macro(LatitudeBounds,double);
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vtkGetVector2Macro(LatitudeBounds,double);
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//@}
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//@{
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/**
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* The longitude bounds of the graticule.
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*/
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vtkSetVector2Macro(LongitudeBounds,double);
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vtkGetVector2Macro(LongitudeBounds,double);
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//@}
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enum LevelLimits {
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LEVEL_MIN = 0,
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LEVEL_MAX = 11,
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NUMBER_OF_LEVELS = ( LEVEL_MAX - LEVEL_MIN + 1 )
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};
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//@{
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/**
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* The frequency level of latitude lines.
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*/
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vtkSetClampMacro(LatitudeLevel,int,LEVEL_MIN,LEVEL_MAX);
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vtkGetMacro(LatitudeLevel,int);
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//@}
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//@{
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/**
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* The frequency level of longitude lines.
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*/
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vtkSetClampMacro(LongitudeLevel,int,LEVEL_MIN,LEVEL_MAX);
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vtkGetMacro(LongitudeLevel,int);
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//@}
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/**
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* The latitude delta at a certain frequency level.
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*/
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static double GetLatitudeDelta(int level)
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{ return LatitudeLevelTics[level]; }
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/**
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* The longitude delta at a certain frequency level.
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*/
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static double GetLongitudeDelta(int level)
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{ return LongitudeLevelTics[level]; }
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//@{
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/**
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* Set//get the type(s) of cells that will be
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* output by the filter. By default, polylines
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* are output. You may also request quadrilaterals.
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* This is a bit vector of GeometryType enums.
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*/
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vtkSetMacro(GeometryType,int);
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vtkGetMacro(GeometryType,int);
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//@}
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enum GeometryType {
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POLYLINES = 0x1,
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QUADRILATERALS = 0x2
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};
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protected:
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vtkGeoGraticule();
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virtual ~vtkGeoGraticule();
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int GeometryType;
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double LatitudeBounds[2];
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double LongitudeBounds[2];
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int LatitudeLevel;
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int LongitudeLevel;
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//@{
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/**
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* The distance between tic marks at each level, in degrees.
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*/
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static double LatitudeLevelTics[NUMBER_OF_LEVELS];
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static double LongitudeLevelTics[NUMBER_OF_LEVELS];
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//@}
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virtual int RequestData( vtkInformation*, vtkInformationVector**, vtkInformationVector* );
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void GenerateGraticule( vtkPolyData* output, double latbds[2], double lngbds[2] );
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int ComputeLineLevel( int ticId, int baseLevel, const double* levelIncrements );
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private:
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vtkGeoGraticule( const vtkGeoGraticule& ) VTK_DELETE_FUNCTION;
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void operator = ( const vtkGeoGraticule& ) VTK_DELETE_FUNCTION;
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};
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#endif // vtkGeoGraticule_h
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