c – 平均圆形值(特别是HSL颜色方案中的色调)

不幸的是,我的实现似乎不起作用.在这里,它是完整的;请注意,虽然我写了“Hue”,但我按照初始实现使用角度(以度为单位)(从0-360角度切换到0-256色调,一旦我知道我的代码有效,就不应该很难).

#include <iostream>    
#include <vector>
#include <cmath>

#define PI (4*atan(1))

int main()
{
    ///
    /// Calculations adapted from this source:
    /// https://stackoverflow.com/questions/8169654/how-to-calculate-mean-and-standard-deviation-for-hue-values-from-0-to-360

    std::vector<double> Hues = {355,5,5};

    //These will be used to store the sum of the angles
    double X = 0.0;
    double Y = 0.0;

    //Loop through all H values
    for (int hue = 0; hue < Hues.size(); ++hue)
    {
        //Add the X and Y values to the sum X and Y
        X += cos(Hues[hue] / 180 * PI);
        Y += sin(Hues[hue] / 180 * PI);
    }

    //Now average the X and Y values
    X /= Hues.size();
    Y /= Hues.size();

    //Get atan2 of those
    double AverageColor = atan2(X,Y) * 180 / PI;

    std::cout << "Average: " << AverageColor << "n";
    return 0;
}

而不是3的预期答案(因为355在这个方案中应该相当于-5),我得到86.9951.

有人可以指出我做错了什么吗？这看起来非常基本.