abstract interface for implicit functions
virtual double EvaluateFunction(double x[3])=0
#define vtkGetMacro(name, type)
double EvaluateFunction(double x, double y, double z)
virtual void EvaluateGradient(double x[3], double g[3])=0
#define vtkTypeMacro(thisClass, superclass)
a simple class to control print indentation
#define vtkGetVector3Macro(name, type)
void PrintSelf(ostream &os, vtkIndent indent)
implicit function for a cylinder
#define vtkSetVector3Macro(name, type)
#define VTKCOMMONDATAMODEL_EXPORT
#define vtkSetMacro(name, type)