get vertex indexes of triangle added to corner table

                .map(corner -> getIndexOfFace(rows.indexOf(corner)))

                .collect(Collectors.toList());

    }

    /**

     * returns indexes of vertices of triangle

     * @param triangleIndex index of triangle

     * @return list of indexes

     */

    public List<Integer> getIndexesOfVerticesByTriangleIndex(int triangleIndex) {

        List<Integer> indexes = new ArrayList<>();

        for (int i = 0; i < 3; i++) {

            CornerTableRow row = getRow(triangleIndex + i);

            indexes.add(row.getVertexIndex());

        }

        return indexes;

    }

}