c++ – Changing voxels into polygons bearing in mind the colours

I’ve code to transform voxels to polygons:

extern class voxel
{
public:
    sf::Vector3f place;
    sf::Vector3f rotation;
    sf::Vector3f attraction_direction;
    sf::Shade* shade;

    float weight = 0;
};

extern class polygon
{
public:
    sf::Vector3f place[3];
    sf::Shade* shade;
};

extern class mannequin
{
public:
    voxel* voxels = new voxel[1];
    polygon* polygons = new polygon[1];

    sf::Vector3f heart = sf::Vector3f(0, 0, 0);
     
    int voxels_count = 0;
    int polygons_count = 0;

    void set_voxel(int voxel_count, sf::Vector3f voxel_position, sf::Shade* voxel_color, sf::Vector3f voxel_rotation, sf::Int16 voxel_weight = 0)
    {
        voxels[voxel_count].place = voxel_position;
        voxels[voxel_count].shade = voxel_color;
        voxels[voxel_count].rotation = voxel_rotation;
        voxels[voxel_count].weight = voxel_weight;
        voxels_count++;
    }

    mannequin()
    {
        for (int i = 0; i (voxels_count);
    };

    ~mannequin()
    {
        delete[] voxels;
        delete[] polygons;
    }

    void optimize()
    {
        polygons_count = 0;
        polygon* polygons__ = new polygon[voxels_count * 12];

        auto add_polygon = [this](const sf::Vector3f& v0, const sf::Vector3f& v1, const sf::Vector3f& v2, sf::Shade* shade, polygon* polygons_) {
            polygons_[polygons_count].place[0] = v0;
            polygons_[polygons_count].place[1] = v1;
            polygons_[polygons_count].place[2] = v2;
            polygons_[polygons_count].shade = shade;
            polygons_count++;
            };

        for (int i = 0; i 

BUT it would not have in mind their colours and I do not know learn how to implement this

And I wrote this code a few 12 months in the past and I do not perceive what is going on on right here anymore