private void LegacyAddVertexColumn(Ferr2DT_SegmentDescription aDesc, List <Vector2> aSegment, List <float> aSegmentScale, bool aClosed, Ferr2D_DynamicMesh mesh, Rect body, float d, float yOff, bool aConnectFace, float slicePercent, int ptLocal, float pctLocal, ref int p1, ref int p2, ref int p3)
    {
        Vector2 pos1 = smoothPath ? Ferr2D_Path.HermiteGetPt(aSegment, ptLocal, pctLocal, aClosed) : Ferr2D_Path.LinearGetPt(aSegment, ptLocal, pctLocal, aClosed);
        Vector2 n1   = smoothPath ? Ferr2D_Path.HermiteGetNormal(aSegment, ptLocal, pctLocal, aClosed) : Ferr2D_Path.LinearGetNormal(aSegment, ptLocal, pctLocal, aClosed);
        float   s    = aClosed    ? Mathf.Lerp(aSegmentScale[ptLocal], aSegmentScale[(ptLocal + 1) % aSegmentScale.Count], pctLocal) : Mathf.Lerp(aSegmentScale[ptLocal], aSegmentScale[Mathf.Min(ptLocal + 1, aSegmentScale.Count - 1)], pctLocal);

        // this compensates for scale distortion when corners are very sharp, but the normals are not long enough to keep the edge the appropriate width
        // not actually a problem for smooth paths
        if (!smoothPath)
        {
            n1.Normalize();
            float rootScale = 1f / Mathf.Abs(Mathf.Cos(Vector2.Angle(Ferr2D_Path.GetSegmentNormal(ptLocal, aSegment, aClosed), n1) * Mathf.Deg2Rad));
            s = s * rootScale;
        }

        int v1 = mesh.AddVertex(pos1.x + n1.x * (d * s + yOff), pos1.y + n1.y * (d * s + yOff), -slantAmount + aDesc.zOffset, Mathf.Lerp(body.x, body.xMax, slicePercent), fill == Ferr2DT_FillMode.InvertedClosed ? body.yMax : body.y);
        int v2 = mesh.AddVertex(pos1.x - n1.x * (d * s - yOff), pos1.y - n1.y * (d * s - yOff), slantAmount + aDesc.zOffset, Mathf.Lerp(body.x, body.xMax, slicePercent), fill == Ferr2DT_FillMode.InvertedClosed ? body.y : body.yMax);
        int v3 = splitMiddle ? mesh.AddVertex(pos1.x + n1.x * yOff, pos1.y + n1.y * yOff, aDesc.zOffset, Mathf.Lerp(body.x, body.xMax, slicePercent), Mathf.Lerp(body.y, body.yMax, 0.5f)) : -1;

        if (aConnectFace)
        {
            if (!splitMiddle)
            {
                mesh.AddFace(v2, p2, p1, v1);
            }
            else
            {
                mesh.AddFace(v2, p2, p3, v3);
                mesh.AddFace(v3, p3, p1, v1);
            }
        }

        p1 = v1;
        p2 = v2;
        p3 = v3;
    }