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vtkGeoEdgeStrategy.h
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vtkGeoEdgeStrategy.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGeoEdgeStrategy.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 vtkGeoEdgeStrategy - Layout graph edges on a globe as arcs.
//
// .SECTION Description
// vtkGeoEdgeStrategy produces arcs for each edge in the input graph.
// This is useful for viewing lines on a sphere (e.g. the earth).
// The arcs may "jump" above the sphere's surface using ExplodeFactor.
#ifndef vtkGeoEdgeStrategy_h
#define vtkGeoEdgeStrategy_h
#include "vtkInfovisLayoutModule.h" // For export macro
#include "vtkEdgeLayoutStrategy.h"
class VTKINFOVISLAYOUT_EXPORT vtkGeoEdgeStrategy : public vtkEdgeLayoutStrategy
{
public:
static vtkGeoEdgeStrategy *New();
vtkTypeMacro(vtkGeoEdgeStrategy,vtkEdgeLayoutStrategy);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// The base radius used to determine the earth's surface.
// Default is the earth's radius in meters.
// TODO: Change this to take in a vtkGeoTerrain to get altitude.
vtkSetMacro(GlobeRadius, double);
vtkGetMacro(GlobeRadius, double);
// Description:
// Factor on which to "explode" the arcs away from the surface.
// A value of 0.0 keeps the values on the surface.
// Values larger than 0.0 push the arcs away from the surface by a distance
// proportional to the distance between the points.
// The default is 0.2.
vtkSetMacro(ExplodeFactor, double);
vtkGetMacro(ExplodeFactor, double);
// Description:
// The number of subdivisions in the arc.
// The default is 20.
vtkSetMacro(NumberOfSubdivisions, int);
vtkGetMacro(NumberOfSubdivisions, int);
// Description:
// Perform the layout.
virtual void Layout();
protected:
vtkGeoEdgeStrategy();
~vtkGeoEdgeStrategy() {}
double GlobeRadius;
double ExplodeFactor;
int NumberOfSubdivisions;
private:
vtkGeoEdgeStrategy(const vtkGeoEdgeStrategy&); // Not implemented.
void operator=(const vtkGeoEdgeStrategy&); // Not implemented.
};
#endif