diff options
Diffstat (limited to 'lib/stitches/auto_fill.py')
| -rw-r--r-- | lib/stitches/auto_fill.py | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/lib/stitches/auto_fill.py b/lib/stitches/auto_fill.py index b4d63224..83ff226b 100644 --- a/lib/stitches/auto_fill.py +++ b/lib/stitches/auto_fill.py @@ -25,6 +25,10 @@ from ..utils.smoothing import smooth_path from ..utils.threading import check_stop_flag +class NoGratingsError(Exception): + pass + + class PathEdge(object): OUTLINE_KEYS = ("outline", "extra", "initial") SEGMENT_KEY = "segment" @@ -78,6 +82,10 @@ def auto_fill(shape, return fallback(shape, running_stitch_length, running_stitch_tolerance) travel_graph = build_travel_graph(fill_stitch_graph, shape, angle, underpath) + + if not travel_graph: + return fallback(shape, running_stitch_length, running_stitch_tolerance) + path = find_stitch_path(fill_stitch_graph, travel_graph, starting_point, ending_point) result = path_to_stitches(shape, path, travel_graph, fill_stitch_graph, angle, row_spacing, max_stitch_length, running_stitch_length, running_stitch_tolerance, @@ -314,7 +322,10 @@ def build_travel_graph(fill_stitch_graph, shape, fill_stitch_angle, underpath): graph.add_nodes_from(fill_stitch_graph.nodes(data=True)) if underpath: - boundary_points, travel_edges = build_travel_edges(shape, fill_stitch_angle) + try: + boundary_points, travel_edges = build_travel_edges(shape, fill_stitch_angle) + except NoGratingsError: + return # This will ensure that a path traveling inside the shape can reach its # target on the outline, which will be one of the points added above. @@ -459,6 +470,9 @@ def build_travel_edges(shape, fill_angle): for ls in mls.geoms for coord in ls.coords] + if grating1.is_empty or grating2.is_empty: + raise NoGratingsError() + diagonal_edges = ensure_multi_line_string(grating1.symmetric_difference(grating2)) check_stop_flag() |