diff options
Diffstat (limited to 'lib/stitch_plan/stitch_plan.py')
| -rw-r--r-- | lib/stitch_plan/stitch_plan.py | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/lib/stitch_plan/stitch_plan.py b/lib/stitch_plan/stitch_plan.py new file mode 100644 index 00000000..570a7645 --- /dev/null +++ b/lib/stitch_plan/stitch_plan.py @@ -0,0 +1,228 @@ +from .stitch import Stitch +from .stop import process_stop +from .trim import process_trim +from .ties import add_ties +from ..svg import PIXELS_PER_MM +from ..utils.geometry import Point +from ..threads import ThreadColor + + +def patches_to_stitch_plan(patches, collapse_len=3.0 * PIXELS_PER_MM): + """Convert a collection of inkstitch.element.Patch objects to a StitchPlan. + + * applies instructions embedded in the Patch such as trim_after and stop_after + * adds tie-ins and tie-offs + * adds jump-stitches between patches if necessary + """ + + stitch_plan = StitchPlan() + color_block = stitch_plan.new_color_block() + + need_trim = False + for patch in patches: + if not patch.stitches: + continue + + if need_trim: + process_trim(color_block, patch.stitches[0]) + need_trim = False + + if not color_block.has_color(): + # set the color for the first color block + color_block.color = patch.color + + if color_block.color == patch.color: + # add a jump stitch between patches if the distance is more + # than the collapse length + if color_block.last_stitch: + if (patch.stitches[0] - color_block.last_stitch).length() > collapse_len: + color_block.add_stitch(patch.stitches[0].x, patch.stitches[0].y, jump=True) + + else: + # add a color change + color_block.add_stitch(color_block.last_stitch.x, color_block.last_stitch.y, stop=True) + color_block = stitch_plan.new_color_block() + color_block.color = patch.color + + color_block.filter_duplicate_stitches() + color_block.add_stitches(patch.stitches, no_ties=patch.stitch_as_is) + + if patch.trim_after: + # a trim needs to be followed by a jump to the next stitch, so + # we'll process it when we start the next patch + need_trim = True + + if patch.stop_after: + process_stop(color_block) + + add_ties(stitch_plan) + + return stitch_plan + + +class StitchPlan(object): + """Holds a set of color blocks, each containing stitches.""" + + def __init__(self): + self.color_blocks = [] + + def new_color_block(self, *args, **kwargs): + color_block = ColorBlock(*args, **kwargs) + self.color_blocks.append(color_block) + return color_block + + def __iter__(self): + return iter(self.color_blocks) + + def __len__(self): + return len(self.color_blocks) + + def __repr__(self): + return "StitchPlan(%s)" % ", ".join(repr(cb) for cb in self.color_blocks) + + @property + def num_colors(self): + """Number of unique colors in the stitch plan.""" + return len({block.color for block in self}) + + @property + def num_stops(self): + return sum(block.num_stops for block in self) + + @property + def num_trims(self): + return sum(block.num_trims for block in self) + + @property + def num_stitches(self): + return sum(block.num_stitches for block in self) + + @property + def bounding_box(self): + color_block_bounding_boxes = [cb.bounding_box for cb in self] + minx = min(bb[0] for bb in color_block_bounding_boxes) + miny = min(bb[1] for bb in color_block_bounding_boxes) + maxx = max(bb[2] for bb in color_block_bounding_boxes) + maxy = max(bb[3] for bb in color_block_bounding_boxes) + + return minx, miny, maxx, maxy + + @property + def dimensions(self): + minx, miny, maxx, maxy = self.bounding_box + return (maxx - minx, maxy - miny) + + @property + def extents(self): + minx, miny, maxx, maxy = self.bounding_box + + return max(-minx, maxx), max(-miny, maxy) + + @property + def dimensions_mm(self): + dimensions = self.dimensions + return (dimensions[0] / PIXELS_PER_MM, dimensions[1] / PIXELS_PER_MM) + + +class ColorBlock(object): + """Holds a set of stitches, all with the same thread color.""" + + def __init__(self, color=None, stitches=None): + self.color = color + self.stitches = stitches or [] + + def __iter__(self): + return iter(self.stitches) + + def __repr__(self): + return "ColorBlock(%s, %s)" % (self.color, self.stitches) + + def has_color(self): + return self._color is not None + + @property + def color(self): + return self._color + + @color.setter + def color(self, value): + if isinstance(value, ThreadColor): + self._color = value + elif value is None: + self._color = None + else: + self._color = ThreadColor(value) + + @property + def last_stitch(self): + if self.stitches: + return self.stitches[-1] + else: + return None + + @property + def num_stitches(self): + """Number of stitches in this color block.""" + return len(self.stitches) + + @property + def num_stops(self): + """Number of pauses in this color block.""" + + # Stops are encoded using two STOP stitches each. See the comment in + # stop.py for an explanation. + + return sum(1 for stitch in self if stitch.stop) / 2 + + @property + def num_trims(self): + """Number of trims in this color block.""" + + return sum(1 for stitch in self if stitch.trim) + + def filter_duplicate_stitches(self): + if not self.stitches: + return + + stitches = [self.stitches[0]] + + for stitch in self.stitches[1:]: + if stitches[-1].jump or stitch.stop or stitch.trim: + # Don't consider jumps, stops, or trims as candidates for filtering + pass + else: + l = (stitch - stitches[-1]).length() + if l <= 0.1: + # duplicate stitch, skip this one + continue + + stitches.append(stitch) + + self.stitches = stitches + + def add_stitch(self, *args, **kwargs): + if isinstance(args[0], Stitch): + self.stitches.append(args[0]) + elif isinstance(args[0], Point): + self.stitches.append(Stitch(args[0].x, args[0].y, *args[1:], **kwargs)) + else: + self.stitches.append(Stitch(*args, **kwargs)) + + def add_stitches(self, stitches, *args, **kwargs): + for stitch in stitches: + if isinstance(stitch, (Stitch, Point)): + self.add_stitch(stitch, *args, **kwargs) + else: + self.add_stitch(*(list(stitch) + args), **kwargs) + + def replace_stitches(self, stitches): + self.stitches = stitches + + @property + def bounding_box(self): + minx = min(stitch.x for stitch in self) + miny = min(stitch.y for stitch in self) + maxx = max(stitch.x for stitch in self) + maxy = max(stitch.y for stitch in self) + + return minx, miny, maxx, maxy |