def draw_2d_view(dots_to_draw):

    for pol in polygons:

        p1 = dots_to_draw[pol[0]-1]
        p2 = dots_to_draw[pol[1]-1]
        p3 = dots_to_draw[pol[2]-1]

        v1 = p2 - p1
        v2 = p3 - p1

        polNor = np.cross(v1,v2)
        print(polNor)

        if(np.dot(ociste,polNor) > 0):
            glPointSize(point_size);
            glColor3f(0, 0, 1)
            glBegin(GL_LINE_LOOP)
            for dot in pol:
                index = dot - 1
                glVertex2f(dots_to_draw[index][0], dots_to_draw[index][1])
            glEnd()