106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkAbstractSplineRepresentation.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 vtkAbstractSplineRepresentation
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* @brief abstract representation for a spline.
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*
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* vtkAbstractSplineRepresentation is a vtkWidgetRepresentation for an abstract spline.
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* This 3D widget defines a spline that can be accessed, set and configured.
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* Deriving classes are then able to combine their own handles using this class.
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*/
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#ifndef vtkAbstractSplineRepresentation_h
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#define vtkAbstractSplineRepresentation_h
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#include "vtkCurveRepresentation.h"
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#include "vtkInteractionWidgetsModule.h" // For export macro
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class vtkParametricFunctionSource;
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class vtkParametricSpline;
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class vtkPolyDataMapper;
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class VTKINTERACTIONWIDGETS_EXPORT vtkAbstractSplineRepresentation : public vtkCurveRepresentation
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{
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public:
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vtkTypeMacro(vtkAbstractSplineRepresentation, 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 spline. The
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* polydata consists of points and line segments numbering Resolution + 1
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* and Resolution, respectively. Points are guaranteed to be up-to-date when
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* either the InteractionEvent or EndInteraction events are invoked. The
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* user provides the vtkPolyData and the points and polyline are added to it.
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*/
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void GetPolyData(vtkPolyData* pd) override;
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///@{
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/**
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* Set/Get the number of line segments representing the spline for
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* this widget.
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* The default value is 499.
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*/
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void SetResolution(int resolution);
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vtkGetMacro(Resolution, int);
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///@}
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///@{
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/**
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* Set the parametric spline object.
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* Can be redefined in the child classes for further updates
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* when a spline is set.
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* The default value is nullptr.
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*/
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vtkGetObjectMacro(ParametricSpline, vtkParametricSpline);
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virtual void SetParametricSpline(vtkParametricSpline* spline);
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///@}
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/**
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* Get the position of the spline handles.
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*/
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vtkDoubleArray* GetHandlePositions() override;
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/**
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* Get the approximate vs. the true arc length of the spline. Calculated as
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* the summed lengths of the individual straight line segments. Use
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* SetResolution to control the accuracy.
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*/
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double GetSummedLength() override;
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protected:
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vtkAbstractSplineRepresentation();
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~vtkAbstractSplineRepresentation() override;
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void CleanRepresentation();
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void SetParametricSplineInternal(vtkParametricSpline* spline);
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// The spline
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vtkParametricSpline* ParametricSpline = nullptr;
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vtkNew<vtkParametricFunctionSource> ParametricFunctionSource;
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// The number of line segments used to represent the spline.
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int Resolution = 499;
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// the mapper supposed to display the spline
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vtkNew<vtkPolyDataMapper> LineMapper;
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private:
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vtkAbstractSplineRepresentation(const vtkAbstractSplineRepresentation&) = delete;
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void operator=(const vtkAbstractSplineRepresentation&) = delete;
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};
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#endif
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