PlateOverlapAnalyzer converted clean programs directly with
ConvertProgram.ToGeometry, which adds call offsets only to
incremental moves, so holes in absolute-mode subprograms were read at
their frame origin. A square with two absolute holes reported
"Native material contours cross or touch", and the Plan Cutting
overlap gate blocked it while the incremental twin passed. Convert an
owned incremental-mode copy instead (PreparedContours.CopyForGeometry,
now internal, the same normalization the cutting planner uses).
The analyzer also threw on a program whose Codes list was null and
cast or cloned instructions it does not know. It now refuses a
missing list and anything other than the exact built-in instruction
types as an incomplete check, before any copy or conversion runs.
Pre-post verification and the plate overlap overlay share this path.
PlateOverlapAnalyzer.Capture(parts, OverlapMaterialCache) reuses each clean
program's converted entities and prepared material across requests, and
Analyze(snapshot, previous) reuses pair results whose two parts kept the
same source, exact pose and relative order, renumbering them. A recheck
after moving one part only clips that part's neighbors again.
On 501 real PEP plates: full check median 1 ms / max 6.4 s; incremental
recheck after one move median 0.1 ms / max 38 ms. Incremental results
matched uncached full analysis exactly across 2505 edits.
aj