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107 lines
3.5 KiB
C
107 lines
3.5 KiB
C
3 weeks ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkBezierContourLineInterpolator.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 vtkBezierContourLineInterpolator
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* @brief Interpolates supplied nodes with bezier line segments
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*
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* The line interpolator interpolates supplied nodes (see InterpolateLine)
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* with Bezier line segments. The fitness of the curve may be controlled using
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* SetMaximumCurveError and SetMaximumNumberOfLineSegments.
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*
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* @sa
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* vtkContourLineInterpolator
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*/
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#ifndef vtkBezierContourLineInterpolator_h
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#define vtkBezierContourLineInterpolator_h
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#include "vtkContourLineInterpolator.h"
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#include "vtkInteractionWidgetsModule.h" // For export macro
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class VTKINTERACTIONWIDGETS_EXPORT vtkBezierContourLineInterpolator
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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 vtkBezierContourLineInterpolator* 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(vtkBezierContourLineInterpolator, vtkContourLineInterpolator);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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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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/**
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* The difference between a line segment connecting two points and the curve
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* connecting the same points. In the limit of the length of the curve
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* dx -> 0, the two values will be the same. The smaller this number, the
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* finer the bezier curve will be interpolated. Default is 0.005
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*/
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vtkSetClampMacro(MaximumCurveError, double, 0.0, VTK_DOUBLE_MAX);
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vtkGetMacro(MaximumCurveError, double);
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//@}
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//@{
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/**
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* Maximum number of bezier line segments between two nodes. Larger values
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* create a finer interpolation. Default is 100.
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*/
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vtkSetClampMacro(MaximumCurveLineSegments, int, 1, 1000);
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vtkGetMacro(MaximumCurveLineSegments, int);
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//@}
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/**
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* Span of the interpolator, i.e. the number of control points it's supposed
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* to interpolate given a node.
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* The first argument is the current nodeIndex.
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* i.e., you'd be trying to interpolate between nodes "nodeIndex" and
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* "nodeIndex-1", unless you're closing the contour, in which case you're
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* trying to interpolate "nodeIndex" and "Node=0". The node span is
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* returned in a vtkIntArray.
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* The node span is returned in a vtkIntArray. The node span returned by
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* this interpolator will be a 2-tuple with a span of 4.
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*/
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void GetSpan(int nodeIndex, vtkIntArray* nodeIndices, vtkContourRepresentation* rep) override;
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protected:
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vtkBezierContourLineInterpolator();
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~vtkBezierContourLineInterpolator() override;
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void ComputeMidpoint(double p1[3], double p2[3], double mid[3])
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{
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mid[0] = (p1[0] + p2[0]) / 2;
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mid[1] = (p1[1] + p2[1]) / 2;
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mid[2] = (p1[2] + p2[2]) / 2;
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}
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double MaximumCurveError;
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int MaximumCurveLineSegments;
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private:
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vtkBezierContourLineInterpolator(const vtkBezierContourLineInterpolator&) = delete;
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void operator=(const vtkBezierContourLineInterpolator&) = delete;
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};
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#endif
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