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116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkTerrainContourLineInterpolator.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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* @class vtkTerrainContourLineInterpolator
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* @brief Contour interpolator for DEM data.
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*
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*
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* vtkTerrainContourLineInterpolator interpolates nodes on height field data.
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* The class is meant to be used in conjunciton with a vtkContourWidget,
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* enabling you to draw paths on terrain data. The class internally uses a
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* vtkProjectedTerrainPath. Users can set kind of interpolation
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* desired between two node points by setting the modes of the this filter.
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* For instance:
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*
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* \code
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* contourRepresentation->SetLineInterpolator(interpolator);
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* interpolator->SetImageData( demDataFile );
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* interpolator->GetProjector()->SetProjectionModeToHug();
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* interpolator->SetHeightOffset(25.0);
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* \endcode
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*
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* You are required to set the ImageData to this class as the height-field
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* image.
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*
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* @sa
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* vtkTerrainDataPointPlacer vtkProjectedTerrainPath
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*/
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#ifndef vtkTerrainContourLineInterpolator_h
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#define vtkTerrainContourLineInterpolator_h
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#include "vtkContourLineInterpolator.h"
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#include "vtkInteractionWidgetsModule.h" // For export macro
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class vtkImageData;
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class vtkProjectedTerrainPath;
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class VTKINTERACTIONWIDGETS_EXPORT vtkTerrainContourLineInterpolator
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: public vtkContourLineInterpolator
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{
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public:
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/**
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* Instantiate this class.
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*/
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static vtkTerrainContourLineInterpolator* New();
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//@{
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/**
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* Standard methods for instances of this class.
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*/
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vtkTypeMacro(vtkTerrainContourLineInterpolator, vtkContourLineInterpolator);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@}
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/**
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* Interpolate to create lines between contour nodes idx1 and idx2.
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* Depending on the projection mode, the interpolated line may either
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* hug the terrain, just connect the two points with a straight line or
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* a non-occluded interpolation.
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* Used internally by vtkContourRepresentation.
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*/
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int InterpolateLine(vtkRenderer* ren, vtkContourRepresentation* rep, int idx1, int idx2) override;
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/**
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* The interpolator is given a chance to update the node.
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* Used internally by vtkContourRepresentation
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* Returns 0 if the node (world position) is unchanged.
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*/
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int UpdateNode(vtkRenderer*, vtkContourRepresentation*, double* vtkNotUsed(node),
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int vtkNotUsed(idx)) override;
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//@{
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/**
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* Set the height field data. The height field data is a 2D image. The
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* scalars in the image represent the height field. This must be set.
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*/
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virtual void SetImageData(vtkImageData*);
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vtkGetObjectMacro(ImageData, vtkImageData);
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//@}
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//@{
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/**
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* Get the vtkProjectedTerrainPath operator used to project the terrain
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* onto the data. This operator has several modes, See the documentation
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* of vtkProjectedTerrainPath. The default mode is to hug the terrain
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* data at 0 height offset.
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*/
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vtkGetObjectMacro(Projector, vtkProjectedTerrainPath);
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//@}
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protected:
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vtkTerrainContourLineInterpolator();
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~vtkTerrainContourLineInterpolator() override;
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vtkImageData* ImageData; // height field data
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vtkProjectedTerrainPath* Projector;
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private:
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vtkTerrainContourLineInterpolator(const vtkTerrainContourLineInterpolator&) = delete;
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void operator=(const vtkTerrainContourLineInterpolator&) = delete;
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};
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#endif
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