Mathematics.h

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/* Copyright (c) 2012-2017, ARM Limited and Contributors
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge,
 * to any person obtaining a copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef MATHEMATICS_H
#define MATHEMATICS_H

#include "VectorTypes.h"

#include <cmath>
#include <cstdlib>
#ifndef M_PI

#define M_PI 3.14159265358979323846f
#endif /* M_PI */

namespace MaliSDK
{
    inline float distanceBetweenPoints(const Vec2f& point1, const Vec2f& point2)
    {
            return sqrtf((point2.x - point1.x) * (point2.x - point1.x) + (point2.y - point1.y) * (point2.y - point1.y));
    }

    inline float signum(float f)
    {
            if (f > 0.0f) 
            {
                    return  1.0f;
            }
        
            if (f < 0.0f) 
            {
                    return -1.0f;
            }

            return 0.0f;
    }

    inline float uniformRandomNumber()
    {
            return rand() / float(RAND_MAX);
    }

    inline float degreesToRadians(float degrees)
    {
        return M_PI * degrees / 180.0f;
    }
}
#endif /* MATHEMATICS_H */