The forward bounding-box gap check (gap < 0) incorrectly skipped obstacles
for irregular shapes like SULLYS-003 whose narrow handle extends past an
adjacent part's BB edge while the wide body still needs contact detection.
Replaced with a reverse-direction gap check that only skips obstacles the
moving part has entirely cleared. Also fixed edge distance check to prevent
overshooting the work area boundary when already at the limit.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
PushSelected now calls Compactor.Push instead of duplicating the push
logic. Compactor.Push moves parts as a group (single min distance) to
preserve grid layouts. Compact tries both left-first and down-first
orderings, iterating up to 20 times until movement drops below
threshold, and keeps whichever ordering traveled further.
Also includes a cancellation check in FillWithProgress to avoid
accepting parts after the user stops a nest.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Previously each moving part only checked against the original stationary
set. Parts pushed earlier in the loop were invisible to later parts,
causing overlaps (utilization > 100%). Now each pushed part is added to
the obstacle set so subsequent parts collide correctly.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
