Main Page   Class Hierarchy   Alphabetical List   Compound List   Compound Members   Related Pages  

vtkImplicitFunction Class Reference

abstract interface for implicit functions. More...

#include <vtkImplicitFunction.h>

Inheritance diagram for vtkImplicitFunction:

Inheritance graph
[legend]
Collaboration diagram for vtkImplicitFunction:

Collaboration graph
[legend]
List of all members.

Public Methods

virtual const char * GetClassName ()
virtual int IsA (const char *type)
void PrintSelf (ostream &os, vtkIndent indent)
unsigned long GetMTime ()
float FunctionValue (const float x[3])
float FunctionValue (float x, float y, float z)
void FunctionGradient (const float x[3], float g[3])
float * FunctionGradient (const float x[3])
float * FunctionGradient (float x, float y, float z)
virtual void SetTransform (vtkAbstractTransform *)
virtual vtkAbstractTransformGetTransform ()
virtual float EvaluateFunction (float x[3])=0
float EvaluateFunction (float x, float y, float z)
virtual void EvaluateGradient (float x[3], float g[3])=0

Static Public Methods

int IsTypeOf (const char *type)
vtkImplicitFunction * SafeDownCast (vtkObject *o)

Protected Methods

 vtkImplicitFunction ()
 ~vtkImplicitFunction ()
 vtkImplicitFunction (const vtkImplicitFunction &)
void operator= (const vtkImplicitFunction &)

Protected Attributes

vtkAbstractTransformTransform
float ReturnValue [3]

Detailed Description

abstract interface for implicit functions.

Date:
2000/12/10 20:08:11
Revision:
1.43

vtkImplicitFunction specifies an abstract interface for implicit functions. Implicit functions are of the form F(x,y,z) = 0. Two primitive operations are required: the ability to evaluate the function, and the function gradient at a given point.

Implicit functions are very powerful. It is possible to represent almost any type of geometry with implicit functions, especially if you use boolean combinations implicit functions (see vtkImplicitBoolean).

vtkImplicitFunction provides a mechanism to transform the implicit function(s) via a vtkAbstractTransform. This capability can be used to translate, orient, scale, or warp implicit functions. For example, a sphere implicit function can be transformed into an oriented ellipse.

Warning:
The transformation transforms a point into the space of the implicit function (i.e., the model space). Typically we want to transform the implicit model into world coordinates. In this case the inverse of the transformation is required.
See also:
vtkAbstractTransform vtkSphere vtkCylinder vtkImplicitBoolean vtkPlane vtkPlanes vtkQuadric vtkImplicitVolume vtkSampleFunction vtkCutter vtkClipPolyData


Member Function Documentation

virtual float vtkImplicitFunction::EvaluateFunction float    x[3] [pure virtual]
 

Evaluate function at position x-y-z and return value. You should generally not call this method directly, you should use FunctionValue() instead. This method must be implemented by any derived class.

Implemented in vtkPlane.

virtual void vtkImplicitFunction::EvaluateGradient float    x[3],
float    g[3]
[pure virtual]
 

Evaluate function gradient at position x-y-z and pass back vector. You should generally not call this method directly, you should use FunctionGradient() instead. This method must be implemented by any derived class.

Implemented in vtkPlane.

void vtkImplicitFunction::FunctionGradient const float    x[3],
float    g[3]
 

Evaluate function gradient at position x-y-z and pass back vector. Point x[3] is transformed through transform (if provided).

float vtkImplicitFunction::FunctionValue const float    x[3]
 

Evaluate function at position x-y-z and return value. Point x[3] is transformed through transform (if provided).

virtual const char* vtkImplicitFunction::GetClassName   [virtual]
 

Return the class name as a string. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkPlane.

unsigned long vtkImplicitFunction::GetMTime   [virtual]
 

Overload standard modified time function. If Transform is modified, then this object is modified as well.

Reimplemented from vtkObject.

Reimplemented in vtkImplicitBoolean.

virtual int vtkImplicitFunction::IsA const char *    type [virtual]
 

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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkPlane.

int vtkImplicitFunction::IsTypeOf const char *    type [static]
 

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 vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkPlane.

void vtkImplicitFunction::PrintSelf ostream &    os,
vtkIndent    indent
[virtual]
 

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 vtkObject.

Reimplemented in vtkPlane.

vtkImplicitFunction* vtkImplicitFunction::SafeDownCast vtkObject   o [static]
 

Will cast the supplied object to vtkObject* is this is a safe operation (i.e., a safe downcast); otherwise NULL is returned. This method is defined in all subclasses of vtkObject with the vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkObject.

Reimplemented in vtkPlane.

virtual void vtkImplicitFunction::SetTransform vtkAbstractTransform   [virtual]
 

Set/Get a transformation to apply to input points before executing the implicit function.


The documentation for this class was generated from the following file:
Generated on Tue Mar 19 13:27:16 2002 for VTK by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002