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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTerrainContourLineInterpolator.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.
=========================================================================*/
// .NAME vtkTerrainContourLineInterpolator - Contour interpolator for DEM data.
//
// .SECTION Description
// vtkTerrainContourLineInterpolator interpolates nodes on height field data.
// The class is meant to be used in conjunciton with a vtkContourWidget,
// enabling you to draw paths on terrain data. The class internally uses a
// vtkProjectedTerrainPath. Users can set kind of interpolation
// desired between two node points by setting the modes of the this filter.
// For instance:
//
// \code
// contourRepresentation->SetLineInterpolator(interpolator);
// interpolator->SetImageData( demDataFile );
// interpolator->GetProjector()->SetProjectionModeToHug();
// interpolator->SetHeightOffset(25.0);
// \endcode
//
// You are required to set the ImageData to this class as the height-field
// image.
//
// .SECTION See Also
// vtkTerrainDataPointPlacer vtkProjectedTerrainPath
#ifndef __vtkTerrainContourLineInterpolator_h
#define __vtkTerrainContourLineInterpolator_h
#include "vtkContourLineInterpolator.h"
class vtkImageData;
class vtkProjectedTerrainPath;
class VTK_WIDGETS_EXPORT vtkTerrainContourLineInterpolator
: public vtkContourLineInterpolator
{
public:
// Description:
// Instantiate this class.
static vtkTerrainContourLineInterpolator *New();
// Description:
// Standard methods for instances of this class.
vtkTypeMacro(vtkTerrainContourLineInterpolator,
vtkContourLineInterpolator);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Interpolate to create lines between contour nodes idx1 and idx2.
// Depending on the projection mode, the interpolated line may either
// hug the terrain, just connect the two points with a straight line or
// a non-occluded interpolation.
// Used internally by vtkContourRepresentation.
virtual int InterpolateLine( vtkRenderer *ren,
vtkContourRepresentation *rep,
int idx1, int idx2 );
// Description:
// The interpolator is given a chance to update the node.
// Used internally by vtkContourRepresentation
// Returns 0 if the node (world position) is unchanged.
virtual int UpdateNode( vtkRenderer *,
vtkContourRepresentation *,
double * vtkNotUsed(node), int vtkNotUsed(idx) );
// Description:
// Set the height field data. The height field data is a 2D image. The
// scalars in the image represent the height field. This must be set.
virtual void SetImageData(vtkImageData *);
vtkGetObjectMacro(ImageData, vtkImageData);
// Description:
// Get the vtkProjectedTerrainPath operator used to project the terrain
// onto the data. This operator has several modes, See the documentation
// of vtkProjectedTerrainPath. The default mode is to hug the terrain
// data at 0 height offset.
vtkGetObjectMacro(Projector, vtkProjectedTerrainPath);
protected:
vtkTerrainContourLineInterpolator();
~vtkTerrainContourLineInterpolator();
vtkImageData *ImageData; // height field data
vtkProjectedTerrainPath *Projector;
private:
vtkTerrainContourLineInterpolator(const vtkTerrainContourLineInterpolator&); //Not implemented
void operator=(const vtkTerrainContourLineInterpolator&); //Not implemented
};
#endif