diff options
Diffstat (limited to 'lib/stitches/tangential_fill_stitch_line_creator.py')
| -rw-r--r-- | lib/stitches/tangential_fill_stitch_line_creator.py | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/lib/stitches/tangential_fill_stitch_line_creator.py b/lib/stitches/tangential_fill_stitch_line_creator.py index 416974c5..042bdde0 100644 --- a/lib/stitches/tangential_fill_stitch_line_creator.py +++ b/lib/stitches/tangential_fill_stitch_line_creator.py @@ -33,81 +33,6 @@ def offset_linear_ring(ring, offset, resolution, join_style, mitre_limit): result_list.append(poly.exterior) return MultiLineString(result_list) - # """ - # Solves following problem: When shapely offsets a LinearRing the - # start/end point might be handled wrongly since they - # are only treated as LineString. - # (See e.g. https://i.stack.imgur.com/vVh56.png as a problematic example) - # This method checks first whether the start/end point form a problematic - # edge with respect to the offset side. If it is not a problematic - # edge we can use the normal offset_routine. Otherwise we need to - # perform two offsets: - # -offset the ring - # -offset the start/end point + its two neighbors left and right - # Finally both offsets are merged together to get the correct - # offset of a LinearRing - # """ - - # PROBLEM: Did not work in rare cases since it expects the point order be maintained after offsetting the curve - # (e.g. the first point in the offsetted curve shall belong to the first point in the original curve). However, this - # assumption seems to be not always true that is why this code was replaced by the buffer routine. - - # coords = ring.coords[:] - # # check whether edge at index 0 is concave or convex. Only for - # # concave edges we need to spend additional effort - # dx_seg1 = dy_seg1 = 0 - # if coords[0] != coords[-1]: - # dx_seg1 = coords[0][0] - coords[-1][0] - # dy_seg1 = coords[0][1] - coords[-1][1] - # else: - # dx_seg1 = coords[0][0] - coords[-2][0] - # dy_seg1 = coords[0][1] - coords[-2][1] - # dx_seg2 = coords[1][0] - coords[0][0] - # dy_seg2 = coords[1][1] - coords[0][1] - # # use cross product: - # crossvalue = dx_seg1 * dy_seg2 - dy_seg1 * dx_seg2 - # sidesign = 1 - # if side == "left": - # sidesign = -1 - - # # We do not need to take care of the joint n-0 since we - # # offset along a concave edge: - # if sidesign * offset * crossvalue <= 0: - # return ring.parallel_offset(offset, side, resolution, join_style, mitre_limit) - - # # We offset along a convex edge so we offset the joint n-0 separately: - # if coords[0] != coords[-1]: - # coords.append(coords[0]) - # offset_ring1 = ring.parallel_offset( - # offset, side, resolution, join_style, mitre_limit - # ) - # offset_ring2 = LineString((coords[-2], coords[0], coords[1])).parallel_offset( - # offset, side, resolution, join_style, mitre_limit - # ) - - # # Next we need to merge the results: - # if offset_ring1.geom_type == "LineString": - # return LinearRing(offset_ring2.coords[:] + offset_ring1.coords[1:-1]) - # else: - # # We have more than one resulting LineString for offset of - # # the geometry (ring) = offset_ring1. - # # Hence we need to find the LineString which belongs to the - # # offset of element 0 in coords =offset_ring2 - # # in order to add offset_ring2 geometry to it: - # result_list = [] - # thresh = constants.offset_factor_for_adjacent_geometry * abs(offset) - # for offsets in offset_ring1: - # if ( - # abs(offsets.coords[0][0] - coords[0][0]) < thresh - # and abs(offsets.coords[0][1] - coords[0][1]) < thresh - # ): - # result_list.append( - # LinearRing(offset_ring2.coords[:] + offsets.coords[1:-1]) - # ) - # else: - # result_list.append(LinearRing(offsets)) - # return MultiLineString(result_list) - def take_only_valid_linear_rings(rings): """ |