add a JUMP at the start of each color block

This seems to be the way other digitizing software does it, so it's probably
required.

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/stitch_plan/stitch_plan.py b/lib/stitch_plan/stitch_plan.py
index 2a35f9aa..93bcd195 100644
--- a/lib/stitch_plan/stitch_plan.py
+++ b/lib/stitch_plan/stitch_plan.py
@@ -59,11 +59,21 @@ def patches_to_stitch_plan(patches, collapse_len=3.0 * PIXELS_PER_MM):
         if patch.stop_after:
             process_stop(color_block)
 
+    add_jumps(stitch_plan)
     add_ties(stitch_plan)
 
     return stitch_plan
 
 
+def add_jumps(stitch_plan):
+    """Add a JUMP stitch at the start of each color block."""
+
+    for color_block in stitch_plan:
+        stitch = color_block.stitches[0].copy()
+        stitch.jump = True
+        color_block.stitches.insert(0, stitch)
+
+
 class StitchPlan(object):
     """Holds a set of color blocks, each containing stitches."""