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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGeoGraticule.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.
=========================================================================*/
/*-------------------------------------------------------------------------
Copyright 2008 Sandia Corporation.
Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .NAME vtkGeoGraticule - Create a polygonal lat-long grid
//
// .SECTION Description
// This filter generates polydata to illustrate the distortions introduced
// by a map projection. The level parameter specifies the number of lines
// to be drawn. Poles are treated differently than other regions; hence the
// use of a Level parameter instead of a NumberOfLines parameter.
// The latitude and longitude are specified as half-open intervals with units
// of degrees. By default the latitude bounds are [-90,90[ and the longitude
// bounds are [0,180[.
#ifndef vtkGeoGraticule_h
#define vtkGeoGraticule_h
#include "vtkGeovisCoreModule.h" // For export macro
#include "vtkPolyDataAlgorithm.h"
class vtkPolyData;
class VTKGEOVISCORE_EXPORT vtkGeoGraticule : public vtkPolyDataAlgorithm
{
public:
static vtkGeoGraticule* New();
virtual void PrintSelf( ostream& os, vtkIndent indent );
vtkTypeMacro(vtkGeoGraticule,vtkPolyDataAlgorithm);
// Description:
// The latitude bounds of the graticule.
vtkSetVector2Macro(LatitudeBounds,double);
vtkGetVector2Macro(LatitudeBounds,double);
// Description:
// The longitude bounds of the graticule.
vtkSetVector2Macro(LongitudeBounds,double);
vtkGetVector2Macro(LongitudeBounds,double);
//BTX
enum LevelLimits {
LEVEL_MIN = 0,
LEVEL_MAX = 11,
NUMBER_OF_LEVELS = ( LEVEL_MAX - LEVEL_MIN + 1 )
};
//ETX
// Description:
// The frequency level of latitude lines.
vtkSetClampMacro(LatitudeLevel,int,LEVEL_MIN,LEVEL_MAX);
vtkGetMacro(LatitudeLevel,int);
// Description:
// The frequency level of longitude lines.
vtkSetClampMacro(LongitudeLevel,int,LEVEL_MIN,LEVEL_MAX);
vtkGetMacro(LongitudeLevel,int);
// Description:
// The latitude delta at a certain frequency level.
static double GetLatitudeDelta(int level)
{ return LatitudeLevelTics[level]; }
// Description:
// The longitude delta at a certain frequency level.
static double GetLongitudeDelta(int level)
{ return LongitudeLevelTics[level]; }
// Description:
// Set//get the type(s) of cells that will be
// output by the filter. By default, polylines
// are output. You may also request quadrilaterals.
// This is a bit vector of GeometryType enums.
vtkSetMacro(GeometryType,int);
vtkGetMacro(GeometryType,int);
//BTX
enum GeometryType {
POLYLINES = 0x1,
QUADRILATERALS = 0x2
};
//ETX
protected:
vtkGeoGraticule();
virtual ~vtkGeoGraticule();
int GeometryType;
double LatitudeBounds[2];
double LongitudeBounds[2];
int LatitudeLevel;
int LongitudeLevel;
// Description:
// The distance between tic marks at each level, in degrees.
static double LatitudeLevelTics[NUMBER_OF_LEVELS];
static double LongitudeLevelTics[NUMBER_OF_LEVELS];
virtual int RequestData( vtkInformation*, vtkInformationVector**, vtkInformationVector* );
void GenerateGraticule( vtkPolyData* output, double latbds[2], double lngbds[2] );
int ComputeLineLevel( int ticId, int baseLevel, const double* levelIncrements );
private:
vtkGeoGraticule( const vtkGeoGraticule& ); // Not implemented.
void operator = ( const vtkGeoGraticule& ); // Not implemented.
};
#endif // vtkGeoGraticule_h
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