+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file polynomial_root.h
-** \brief Polynomial Root Finder Header
-**
-** $Id$
-**
-** \legal
-** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-**
-** This package is free software; you can redistribute it and/or
-** modify it under the terms of the GNU General Public License as
-** published by the Free Software Foundation; either version 2 of
-** the License, or (at your option) any later version.
-**
-** This package is distributed in the hope that it will be useful,
-** but WITHOUT ANY WARRANTY; without even the implied warranty of
-** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-** General Public License for more details.
-** \endlegal
-*/
-/* ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __SYNFIG_POLYNOMIAL_ROOT_H
-#define __SYNFIG_POLYNOMIAL_ROOT_H
-
-/* === H E A D E R S ======================================================= */
-
-#include <complex>
-#include <vector>
-
-/* === M A C R O S ========================================================= */
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-template < typename T = float, typename F = float >
-class Polynomial : public std::vector<T> //a0 + a1x + a2x^2 + ... + anx^n
-{
-public:
-
- //Will maintain all lower constants
- void degree(unsigned int d, const T & def = (T)0) { resize(d+1,def); }
- unsigned int degree()const { return size() - 1; }
-
- const Polynomial & operator+=(const Polynomial &p)
- {
- if(p.size() > size())
- resize(p.size(), (T)0);
-
- for(int i = 0; i < p.size(); ++i)
- {
- (*this)[i] += p[i];
- }
- return *this;
- }
-
- const Polynomial & operator-=(const Polynomial &p)
- {
- if(p.size() > size())
- resize(p.size(), (T)0);
-
- for(int i = 0; i < p.size(); ++i)
- {
- (*this)[i] -= p[i];
- }
- return *this;
- }
-
- const Polynomial & operator*=(const Polynomial &p)
- {
- if(p.size() < 1)
- {
- resize(0);
- return *this;
- }
-
- unsigned int i,j;
- std::vector<T> nc(*this);
-
- //in place for constant stuff
- for(i = 0; i < nc.size(); ++i)
- {
- (*this)[i] *= p[0];
- }
-
- if(p.size() < 2) return *this;
-
- resize(size() + p.degree());
- for(int i = 0; i < nc.size(); ++i)
- {
- for(int j = 1; j < p.size(); ++j)
- {
- nc[i+j] += nc[i]*p[j];
- }
- }
-
- return *this;
- }
-};
-
-class RootFinder
-{
- std::vector< std::complex<float> > workcoefs;
- int its;
-
-public:
- std::vector< std::complex<float> > coefs; //the number of coefficients determines the degree of polynomial
-
- std::vector< std::complex<float> > roots;
-
- void find_all_roots(bool polish);
-};
-
-
-
-/* === E N D =============================================================== */
-
-#endif