kopia lustrzana https://github.com/inkstitch/inkstitch
71 wiersze
2.2 KiB
Python
71 wiersze
2.2 KiB
Python
# Authors: see git history
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#
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# Copyright (c) 2010 Authors
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# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
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from copy import deepcopy
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from .stitch import Stitch
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from ..svg import PIXELS_PER_MM
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def add_tie(stitches, tie_path):
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if len(tie_path) < 2 or tie_path[0].no_ties:
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# It's from a manual stitch block, so don't add tie stitches. The user
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# will add them if they want them.
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return
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to_previous = tie_path[1] - tie_path[0]
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length = to_previous.length()
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if length > 0.5 * PIXELS_PER_MM:
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# Travel back one stitch, stopping halfway there.
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# Then go forward one stitch, stopping halfway between
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# again.
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# but travel at most 1.5mm
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length = min(length, 1.5 * PIXELS_PER_MM)
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direction = to_previous.unit()
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for delta in (0.5, 1.0, 0.5, 0):
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stitches.append(Stitch(tie_path[0] + delta * length * direction))
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else:
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# Too short to travel part of the way to the previous stitch; ust go
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# back and forth to it a couple times.
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for i in (1, 0, 1, 0):
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stitches.append(deepcopy(tie_path[i]))
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def add_tie_off(stitches):
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add_tie(stitches, stitches[-1:-3:-1])
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def add_tie_in(stitches, upcoming_stitches):
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add_tie(stitches, upcoming_stitches)
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def add_ties(stitch_plan):
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"""Add tie-off before and after trims, jumps, and color changes."""
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need_tie_in = True
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for color_block in stitch_plan:
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new_stitches = []
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for i, stitch in enumerate(color_block.stitches):
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is_special = stitch.trim or stitch.jump or stitch.color_change or stitch.stop
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if is_special and not need_tie_in:
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add_tie_off(new_stitches)
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new_stitches.append(stitch)
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need_tie_in = True
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elif need_tie_in and not is_special:
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new_stitches.append(stitch)
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add_tie_in(new_stitches, upcoming_stitches=color_block.stitches[i:])
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need_tie_in = False
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else:
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new_stitches.append(stitch)
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color_block.replace_stitches(new_stitches)
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if not need_tie_in:
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# tie off at the end if we haven't already
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add_tie_off(color_block.stitches)
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