VTK
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computes an interpolating spline using a Kochanek basis. More...
#include <vtkKochanekSpline.h>
Inherits vtkSpline.
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typedef vtkSpline | Superclass |
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virtual int | IsA (const char *type) |
vtkKochanekSpline * | NewInstance () const |
void | PrintSelf (ostream &os, vtkIndent indent) |
void | Compute () |
double | Evaluate (double t) |
virtual void | DeepCopy (vtkSpline *s) |
virtual void | SetDefaultBias (double) |
virtual double | GetDefaultBias () |
virtual void | SetDefaultTension (double) |
virtual double | GetDefaultTension () |
virtual void | SetDefaultContinuity (double) |
virtual double | GetDefaultContinuity () |
Static Public Member Functions | |
static int | IsTypeOf (const char *type) |
static vtkKochanekSpline * | SafeDownCast (vtkObjectBase *o) |
static vtkKochanekSpline * | New () |
Protected Member Functions | |
virtual vtkObjectBase * | NewInstanceInternal () const |
vtkKochanekSpline () | |
~vtkKochanekSpline () | |
void | Fit1D (int n, double *x, double *y, double tension, double bias, double continuity, double coefficients[][4], int leftConstraint, double leftValue, int rightConstraint, double rightValue) |
Protected Attributes | |
double | DefaultBias |
double | DefaultTension |
double | DefaultContinuity |
computes an interpolating spline using a Kochanek basis.
Implements the Kochenek interpolating spline described in: Kochanek, D., Bartels, R., "Interpolating Splines with Local Tension, Continuity, and Bias Control," Computer Graphics, vol. 18, no. 3, pp. 33-41, July 1984. These splines give the user more control over the shape of the curve than the cardinal splines implemented in vtkCardinalSpline. Three parameters can be specified. All have a range from -1 to 1.
Tension controls how sharply the curve bends at an input point. A value of -1 produces more slack in the curve. A value of 1 tightens the curve.
Continuity controls the continuity of the first derivative at input points.
Bias controls the direction of the curve at it passes through an input point. A value of -1 undershoots the point while a value of 1 overshoots the point.
These three parameters give the user broad control over the shape of the interpolating spline. The original Kochanek paper describes the effects nicely and is recommended reading.
Definition at line 56 of file vtkKochanekSpline.h.
typedef vtkSpline vtkKochanekSpline::Superclass |
Definition at line 59 of file vtkKochanekSpline.h.
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Definition at line 95 of file vtkKochanekSpline.h.
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vtkKochanekSpline* vtkKochanekSpline::NewInstance | ( | ) | const |
void vtkKochanekSpline::PrintSelf | ( | ostream & | os, |
vtkIndent | indent | ||
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Construct a KochanekSpline with the following defaults: DefaultBias = 0, DefaultTension = 0, DefaultContinuity = 0.
void vtkKochanekSpline::Compute | ( | ) |
Compute Kochanek Spline coefficients.
double vtkKochanekSpline::Evaluate | ( | double | t | ) |
Evaluate a 1D Kochanek spline.
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Set the bias for all points. Default is 0.
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Set the bias for all points. Default is 0.
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Set the tension for all points. Default is 0.
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Set the tension for all points. Default is 0.
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Set the continuity for all points. Default is 0.
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Set the continuity for all points. Default is 0.
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Deep copy of cardinal spline data.
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Definition at line 101 of file vtkKochanekSpline.h.
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Definition at line 102 of file vtkKochanekSpline.h.
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Definition at line 103 of file vtkKochanekSpline.h.