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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#if !defined CUBIC_UTILITIES_H
#define CUBIC_UTILITIES_H
#include "DataTypes.h"
#include "SkTDArray.h"
double cube_root(double x);
int cubic_to_quadratics(const Cubic& cubic, double precision,
SkTDArray<Quadratic>& quadratics);
void coefficients(const double* cubic, double& A, double& B, double& C, double& D);
int cubicRoots(double A, double B, double C, double D, double t[3]);
double derivativeAtT(const double* cubic, double t);
// competing version that should produce same results
double derivativeAtT_2(const double* cubic, double t);
void dxdy_at_t(const Cubic& , double t, double& x, double& y);
bool rotate(const Cubic& cubic, int zero, int index, Cubic& rotPath);
double secondDerivativeAtT(const double* cubic, double t);
void xy_at_t(const Cubic& , double t, double& x, double& y);
#endif
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