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maths.h
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maths.h
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/*
* This file is part of Cleanflight.
*
* Cleanflight 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 3 of the License, or
* (at your option) any later version.
*
* Foobar 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.
*
* You should have received a copy of the GNU General Public License
* along with Cleanflight. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifndef sq
#define sq(x) ((x)*(x))
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846f
#endif /* M_PI */
#define RADX10 (M_PI / 1800.0f) // 0.001745329252f#define RAD (M_PI / 180.0f)
#define DEG2RAD(degrees) (degrees * RAD)
#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))
#define abs(x) ((x) > 0 ? (x) : -(x))
typedef struct stdev_t
{
float m_oldM, m_newM, m_oldS, m_newS;
int m_n;
} stdev_t;
int constrain(int amt, int low, int high);
float constrainf(float amt, float low, float high);
void devClear(stdev_t *dev);
void devPush(stdev_t *dev, float x);
float devVariance(stdev_t *dev);
float devStandardDeviation(stdev_t *dev);
float degreesToRadians(int16_t degrees);