pfPolyScalar(3pf) OpenGL Performer 3.2.2 libpf C++ Reference Pages
NAMEpfPolyScalar - A polynomial function
FUNCTION SPECIFICATION
#include <Performer/pf/pfScalars.h>
pfPolyScalar::pfPolyScalar();
pfPolyScalar::pfPolyScalar(int degree, pfReal* coef);
static pfType * pfPolyScalar::getClassType(void);
void pfPolyScalar::set(int degree, pfReal *coef);
int pfPolyScalar::getDegree() const;
pfReal pfPolyScalar::getCoef(int i);
pfReal pfPolyScalar::eval(pfReal u);
PARENT CLASS FUNCTIONS
The OpenGL Performer class pfPolyScalar is derived from the parent class
pfScalar, so each of these member functions of class pfScalar are also
directly usable with objects of class pfPolyScalar. This is also true
for ancestor classes of class pfScalar.
pfReal pfScalar::eval(pfReal u) = 0;
Since the class pfScalar is itself derived from the parent class
pfObject, objects of class pfPolyScalar can also be used with these
functions designed for objects of class pfObject.
void* pfObject::operator new(size_t);
void* pfObject::operator new(size_t, pfFluxMemory *fmem);
void pfObject::setUserData(void *data);
void pfObject::setUserData(int slot, void *data);
void* pfObject::getUserData(pfObject *obj);
void* pfObject::getUserData(pfObject *obj, int slot);
int pfObject::getNumUserData();
Since the class pfObject is itself derived from the parent class
pfMemory, objects of class pfPolyScalar can also be used with these
functions designed for objects of class pfMemory.
void* pfMemory::getData(const void *ptr);
pfType * pfMemory::getType();
int pfMemory::isOfType(pfType *type);
int pfMemory::isExactType(pfType *type);
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const char * pfMemory::getTypeName();
int pfMemory::copy(pfMemory *src);
int pfMemory::compare(const pfMemory *mem);
void pfMemory::print(uint which, uint verbose, char *prefix,
FILE *file);
int pfMemory::getArena(void *ptr);
void* pfMemory::getArena();
int pfMemory::ref();
int pfMemory::unref();
int pfMemory::unrefDelete();
int pfMemory::unrefGetRef();
int pfMemory::getRef();
int pfMemory::checkDelete();
int pfMemory::isFluxed();
void * pfMemory::getArena();
int pfMemory::getSize();
DESCRIPTIONpfPolyScalar defines a polynomial function:
s = a[0] + a[1]*u + a[2]*u^2 + ... a[n]*u^n
where n is the degree of the polynomial and a[i]'s are the coefficients.
new(arena) allocates a pfPolyScalar from the specified memory arena, or
from the process heap if arena is NULL. new allocates a pfPolyScalar
from the default memory arena (see pfGetSharedArena). Like other
pfObjects, pfPolyScalars cannot be created statically, automatically on
the stack or in arrays. pfPolyScalars should be deleted with pfDelete
rather than the delete operator.
pfPolyScalar::getClassType returns the pfType* for the class
pfPolyScalar. the pfType* returned by pfPolyScalar::getClassType is the
same as the pfType* returned by invoking the virtual function getType on
any instance of class pfPolyScalar. Because OpenGL Performer allows
subclassing of built-in types, when decisions are made based on the type
of an object, it is usually better to use the member function isOfType
to test if an object is of a type derived from a Performer type rather
than to test for strict equality of the pfType*'s.
pfPolyScalar::pfPolyScalar() creates an instance of pfPolyScalar. No
valid data is set.
pfPolyScalar::pfPolyScalar(int degree,pfReal *coef) creates an instance
of pfPolyScalar. degree is the degree of the polynomial. coef are the
coefficients of the polynomial. The polynomial is defined as:
coef[0] + coef[1]*u + coef[2]*u^2 + ...
pfPolyScalar::set sets the degree and the polynomia where degree is the
degree of the polynomial and coef are the coefficients of the polynomial.
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The polynomial is defined as:
coef[0] + coef[1]*u + coef[2]*u^2 + ...
pfPolyScalar::getDegree returns the degree of the polynomial.
pfPolyScalar::getCoef returns the i'th coefficient of the polynomial.
pfPolyScalar::eval returns the value of the polynomial at u
SEE ALSO
pfObject, pfScalar
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