135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkPolyLineRepresentation.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 vtkPolyLineRepresentation
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* @brief vtkWidgetRepresentation for a poly line.
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*
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* vtkPolyLineRepresentation is a vtkCurveRepresentation for a poly
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* line. This 3D widget defines a poly line that can be interactively
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* placed in a scene. The poly line has handles, the number of which
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* can be changed, plus the widget can be picked on the poly line
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* itself to translate or rotate it in the scene.
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* Based on vtkCurveRepresentation
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* @sa
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* vtkSplineRepresentation
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*/
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#ifndef vtkPolyLineRepresentation_h
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#define vtkPolyLineRepresentation_h
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#include "vtkCurveRepresentation.h"
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#include "vtkInteractionWidgetsModule.h" // For export macro
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class vtkPolyLineSource;
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class vtkPointHandleSource;
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class VTKINTERACTIONWIDGETS_EXPORT vtkPolyLineRepresentation : public vtkCurveRepresentation
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{
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public:
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static vtkPolyLineRepresentation* New();
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vtkTypeMacro(vtkPolyLineRepresentation, vtkCurveRepresentation);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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/**
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* Grab the polydata (including points) that defines the poly line.
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* polydata consists of points and line segments between consecutive
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* points. Points are guaranteed to be up-to-date when either the
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* InteractionEvent or EndInteraction events are invoked. The user
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* provides the vtkPolyData and the points and polyline are added to
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* it.
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*/
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void GetPolyData(vtkPolyData* pd) override;
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/**
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* Set the number of handles for this widget.
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*/
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void SetNumberOfHandles(int npts) override;
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/**
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* Get the positions of the handles.
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*/
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vtkDoubleArray* GetHandlePositions() override;
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/**
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* Get the true length of the poly line. Calculated as the summed
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* lengths of the individual straight line segments.
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*/
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double GetSummedLength() override;
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/**
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* Convenience method to allocate and set the handles from a
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* vtkPoints instance. If the first and last points are the same,
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* the poly line sets Closed to on and disregards the last point,
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* otherwise Closed remains unchanged.
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*/
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void InitializeHandles(vtkPoints* points) override;
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/**
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* Build the representation for the poly line.
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*/
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void BuildRepresentation() override;
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protected:
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vtkPolyLineRepresentation();
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~vtkPolyLineRepresentation() override;
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// The poly line source
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vtkNew<vtkPolyLineSource> PolyLineSource;
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/**
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* Specialized method to insert a handle on the poly line.
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*/
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int InsertHandleOnLine(double* pos) override;
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/**
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* Delete all the handles.
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*/
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void ClearHandles();
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/**
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* Allocate/Reallocate the handles according
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* to npts.
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*/
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void AllocateHandles(int npts);
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/**
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* Create npts default handles.
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*/
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void CreateDefaultHandles(int npts);
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/**
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* Recreate the handles according to a
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* number of points equal to npts.
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* It uses the current spline to recompute
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* the positions of the new handles.
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*/
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void ReconfigureHandles(int npts);
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// Specialized methods to access handles
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vtkActor* GetHandleActor(int index) override;
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vtkHandleSource* GetHandleSource(int index) override;
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virtual int GetHandleIndex(vtkProp* prop) override;
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private:
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vtkPolyLineRepresentation(const vtkPolyLineRepresentation&) = delete;
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void operator=(const vtkPolyLineRepresentation&) = delete;
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// Glyphs representing hot spots (e.g., handles)
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std::vector<vtkSmartPointer<vtkPointHandleSource>> PointHandles;
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std::vector<vtkSmartPointer<vtkActor>> HandleActors;
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};
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#endif
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