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152 lines
4.5 KiB
C++
152 lines
4.5 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkCellCentersPointPlacer.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 vtkCellCentersPointPlacer
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* @brief Snaps points at the center of a cell
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*
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*
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* vtkCellCentersPointPlacer is a class to snap points on the center of cells.
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* The class has 3 modes. In the ParametricCenter mode, it snaps points
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* to the parametric center of the cell (see vtkCell). In CellPointsMean
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* mode, points are snapped to the mean of the points in the cell.
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* In 'None' mode, no snapping is performed. The computed world position
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* is the picked position within the cell.
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*
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* @par Usage:
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* The actors that render data and wish to be considered for placement
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* by this placer are added to the list as
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* \code
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* placer->AddProp( actor );
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* \endcode
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*
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* @sa
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* vtkPointPlacer
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*/
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#ifndef vtkCellCentersPointPlacer_h
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#define vtkCellCentersPointPlacer_h
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#include "vtkInteractionWidgetsModule.h" // For export macro
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#include "vtkPointPlacer.h"
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class vtkRenderer;
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class vtkPropCollection;
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class vtkProp;
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class vtkCellPicker;
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class VTKINTERACTIONWIDGETS_EXPORT vtkCellCentersPointPlacer : public vtkPointPlacer
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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 vtkCellCentersPointPlacer* 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(vtkCellCentersPointPlacer, vtkPointPlacer);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@}
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// Descuription:
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// Add an actor (that represents a terrain in a rendererd scene) to the
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// list. Only props in this list are considered by the PointPlacer
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virtual void AddProp(vtkProp*);
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virtual void RemoveViewProp(vtkProp* prop);
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virtual void RemoveAllProps();
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int HasProp(vtkProp*);
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int GetNumberOfProps();
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/**
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* Given a renderer and a display position in pixel coordinates,
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* compute the world position and orientation where this point
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* will be placed. This method is typically used by the
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* representation to place the point initially.
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* For the Terrain point placer this computes world points that
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* lie at the specified height above the terrain.
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*/
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int ComputeWorldPosition(
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vtkRenderer* ren, double displayPos[2], double worldPos[3], double worldOrient[9]) override;
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/**
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* Given a renderer, a display position, and a reference world
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* position, compute the new world position and orientation
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* of this point. This method is typically used by the
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* representation to move the point.
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*/
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int ComputeWorldPosition(vtkRenderer* ren, double displayPos[2], double refWorldPos[3],
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double worldPos[3], double worldOrient[9]) override;
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/**
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* Given a world position check the validity of this
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* position according to the constraints of the placer
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*/
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int ValidateWorldPosition(double worldPos[3]) override;
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/**
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* Given a display position, check the validity of this position.
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*/
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int ValidateDisplayPosition(vtkRenderer*, double displayPos[2]) override;
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/**
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* Given a world position and a world orientation,
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* validate it according to the constraints of the placer.
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*/
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int ValidateWorldPosition(double worldPos[3], double worldOrient[9]) override;
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//@{
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/**
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* Get the Prop picker.
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*/
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vtkGetObjectMacro(CellPicker, vtkCellPicker);
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//@}
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//@{
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/**
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* Modes to change the point placement. Parametric center picks
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* the parametric center within the cell. CellPointsMean picks
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* the average of all points in the cell. When the mode is None,
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* the input point is passed through unmodified. Default is CellPointsMean.
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*/
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vtkSetMacro(Mode, int);
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vtkGetMacro(Mode, int);
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//@}
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enum
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{
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ParametricCenter = 0,
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CellPointsMean,
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None
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};
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protected:
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vtkCellCentersPointPlacer();
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~vtkCellCentersPointPlacer() override;
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// The props that represents the terrain data (one or more) in a rendered
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// scene
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vtkPropCollection* PickProps;
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vtkCellPicker* CellPicker;
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int Mode;
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private:
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vtkCellCentersPointPlacer(const vtkCellCentersPointPlacer&) = delete;
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void operator=(const vtkCellCentersPointPlacer&) = delete;
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};
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#endif
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