vtkKochanekSpline Class Reference
#include <vtkKochanekSpline.h>
Inheritance diagram for vtkKochanekSpline:
Detailed Description
computes an interpolating spline using a Kochanek basis.
- Date:
- 2002/11/12 20:09:10
- Revision:
- 1.25
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.
- See also:
- vtkSpline vtkCardinalSpline
- Created by:
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- Lorensen, Bill
- CVS contributions (if > 5%):
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- Lorensen, Bill (81%)
- Schroeder, Will (11%)
- Examples:
- vtkKochanekSpline (Examples)
- Tests:
- vtkKochanekSpline (Tests)
Definition at line 70 of file vtkKochanekSpline.h.
Public Types | |
| typedef vtkSpline | Superclass |
Public Methods | |
| virtual const char * | GetClassName () |
| virtual int | IsA (const char *type) |
| void | PrintSelf (ostream &os, vtkIndent indent) |
| void | Compute () |
| float | Evaluate (float t) |
| virtual void | DeepCopy (vtkSpline *s) |
| virtual void | SetDefaultBias (float) |
| virtual float | GetDefaultBias () |
| virtual void | SetDefaultTension (float) |
| virtual float | GetDefaultTension () |
| virtual void | SetDefaultContinuity (float) |
| virtual float | GetDefaultContinuity () |
Static Public Methods | |
| int | IsTypeOf (const char *type) |
| vtkKochanekSpline * | SafeDownCast (vtkObject *o) |
| vtkKochanekSpline * | New () |
Protected Methods | |
| vtkKochanekSpline () | |
| ~vtkKochanekSpline () | |
| void | Fit1D (int n, float *x, float *y, float tension, float bias, float continuity, float coefficients[][4], int leftConstraint, float leftValue, int rightConstraint, float rightValue) |
Protected Attributes | |
| float | DefaultBias |
| float | DefaultTension |
| float | DefaultContinuity |
Member Typedef Documentation
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Reimplemented from vtkSpline. Definition at line 73 of file vtkKochanekSpline.h. |
Constructor & Destructor Documentation
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Definition at line 109 of file vtkKochanekSpline.h. |
Member Function Documentation
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Reimplemented from vtkSpline. |
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Return 1 if this class type is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h. Reimplemented from vtkSpline. |
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Return 1 if this class is the same type of (or a subclass of) the named class. Returns 0 otherwise. This method works in combination with vtkTypeRevisionMacro found in vtkSetGet.h. Reimplemented from vtkSpline. |
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Reimplemented from vtkSpline. |
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Methods invoked by print to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes. Reimplemented from vtkSpline. |
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Construct a KochanekSpline with the following defaults: DefaultBias = 0, DefaultTension = 0, DefaultContinuity = 0. Reimplemented from vtkObject. |
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Compute Kochanek Spline coefficients. Implements vtkSpline. |
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Evaluate a 1D Kochanek spline. Implements vtkSpline. |
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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. Reimplemented from vtkSpline. |
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Member Data Documentation
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Definition at line 115 of file vtkKochanekSpline.h. |
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Definition at line 116 of file vtkKochanekSpline.h. |
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Definition at line 117 of file vtkKochanekSpline.h. |
The documentation for this class was generated from the following file:
- Filtering/vtkKochanekSpline.h