void Graphics_Engine::render(Hex_Board::hex_tile const * const * const tiles_list, uint16_t tiles_count)
{
    double x, y, x_i, y_i;
    double angle;

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    camera->update();
    glColor3f( 0.0f, 1.0f, 0.0f);


    for (uint16_t i = 0; i < tiles_count; i++)
    {
        glBegin(GL_LINE_LOOP);
        x = sqrt(3.) * (tiles_list[i]->q + tiles_list[i]->r/2.);
        y = 3./2. * tiles_list[i]->r;

        for (uint8_t i = 0; i < 6; i++)
        {
            angle = 2. * M_PI / 6. * (i + 0.5);
            x_i = x + cos(angle);
            y_i = y + sin(angle);
            glVertex3f(x_i, y_i, 0);
        }
        glEnd();
    }

    SDL_RenderPresent(renderer);
    glClear(GL_COLOR_BUFFER_BIT);
}

void Camera::update()
{

    gluLookAt(pos[0], pos[1], pos[2],
              tar[0], tar[1], tar[2],
              up[0], up[1], up[2]);
}

void Camera::rotate_mouse(int16_t x, int16_t y)
{
    glm::dvec3 rel = pos-tar;

    rel = glm::rotateX(rel, (double)y/10.0f);
    rel = glm::rotateY(rel, (double)x/10.0f);

    tar=pos+rel;
    //update();
    //rotate((double)y/100.0f, glm::dvec3(1.0f, 0.0f, 0.0f));
    //rotate((double)x/100.0f, glm::dvec3(0.0f, 1.0f, 0.0f));

}

while (SDL_PollEvent(&event))
    {
        switch (event.type)
        {
        case SDL_MOUSEMOTION:
            if (dragging)
            {
                graphics->get_camera()->rotate_mouse(event.motion.xrel, event.motion.yrel);
            }
            break;

        }
    }

void Camera::update()
{
    gluLookAt(pos[0], pos[1], pos[2],
              tar[0], tar[1], tar[2],
              up[0], up[1], up[2]);
}