void get_min_max(const char *filename, float *a_min_x, float *a_max_x, float *a_min_y, float *a_max_y, float *a_min_z, float *a_max_z) {
    FILE *f = NULL;
    float
        min_x = FLT_MAX,
        min_y = FLT_MAX,
        min_z = FLT_MAX,
        max_x = -FLT_MAX,
        max_y = -FLT_MAX,
        max_z = -FLT_MAX;

    std::ifstream ifsData(filename, std::ios::binary);

    if (!ifsData.is_open()) {
        std::printf("!!! - Error, cannot open a file %s for reading\n", filename);
        return;
    }

    while(!ifsData.eof())
    {
        float x, y, z;
        int l_type;
        ifsData.read((char*)(&x), sizeof(float));
        ifsData.read((char*)(&y), sizeof(float));
        ifsData.read((char*)(&z), sizeof(float));
        ifsData.read((char*)(&l_type), sizeof(int));

        if (x < min_x) {
            min_x = x;
        }
        if (x > max_x) {
            max_x = x;
        }
        if (y < min_y) {
            min_y = y;
        }
        if (y > max_y) {
            max_y = y;
        }
        if (z < min_z) {
            min_z = z;
        }
        if (z > max_z) {
            max_z = z;
        }
    }

    *a_min_x = min_x;
    *a_max_x = max_x;
    *a_min_y = min_y;
    *a_max_y = max_y;
    *a_min_z = min_z;
    *a_max_z = max_z;
}