stitch.py

import pyembroidery as em

pattern = em.EmbPattern()

# units are in 1/10mm
# max size in DST is 12mm so if we go bigger need to fuck with max_stitch
SIZE = 32

# start with a stitch at the origin to get the needle down (see the docs)
pattern.stitch_abs(0, 0)

# stitch a 10x10 block
# do y first so we stitch across then down
# this doesn't really matter though
for y in range(5):
    for x in range(5):

        # A single stitch:
        #
        # 1    4    1. jump to start of stitch (1)
        #  \  /     2. 1. stitch diagonal down (1 -> 2)
        #   \/      3. jump back left (2 -> 3)
        #   /\      4. stitch diagonal up (3 -> 4) - next stitch starts here usually
        #  /  \
        # 3 -- 2    remember: +x is to the right, +y is down

        pattern.move_abs(x * SIZE, y * SIZE)  # <--- this sucks at the end of a row, generates a huge jump :(
        pattern.stitch(SIZE, SIZE)
        pattern.move(-SIZE, 0)
        pattern.stitch(SIZE, -SIZE)

        # XXX repeat a few times?
        # causes difficulty in stitch routing


# tie off and cut (don't know if cut works)
pattern.stitch(0, 0)
pattern.trim()
pattern.end()

em.write_pes(pattern, "pattern.pes")