Humm tried to implement it simply using std::complex but it does not give me meaningful results. What did I do wrong?

template<class T> void CalcRealPercentage( const complex<T> from, const complex<T> to, const int intervalSize, std::vector<int>& intensityMap ){ auto height = to.imag() - from.imag(); auto width = to.real() - from.real();

    assert(intervalSize > 0 && height > 0 && width > 0 && from > 0);
    
    intensityMap.resize(width * height, 0);
    
    for (complex<T> c = from; c.imag() < to.imag(); c.imag(c.imag() + 1)) {
        for (; c.real() < to.real(); c.real(c.real() + 1)) {
            
            for (auto i = 0; i < intervalSize; i++) {
                complex<T> g(i, i);
                complex<T> result = g / c;
                auto imagPart = result.imag();
                if (imagPart == 0) {
                    intensityMap.at(c.imag() * width + c.real())++;
                }
            }
        }
    }