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40 changed files with 1443 additions and 1497 deletions
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@ -41,22 +41,22 @@ Totals across the same 84 cases, September 2026:
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| Metric | Original | Minimise cuts | Maximise randomness |
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| ------------------- | -------: | ------------: | ------------------: |
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| Flooring saw passes | 2,177 | **1,741** | **2,113** |
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| Flooring saw passes | 2,177 | **1,741** | **2,122** |
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| Shaping passes | 192 | 184 | 188 |
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| Rip passes | 414 | 402 | 409 |
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| Legacy penalty | 265 | 2,207 | 346 |
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| Flooring boards | 3,561 | 3,548 | 3,551 |
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| Flooring waste | 8.20% | 7.85% | 7.94% |
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| Rip passes | 414 | 402 | 411 |
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| Legacy penalty | 265 | 2,279 | 350 |
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| Flooring boards | 3,561 | 3,548 | 3,550 |
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| Flooring waste | 8.20% | 7.85% | 7.91% |
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| Invalid cases | 0 | 0 | 0 |
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Minimise cuts saves **20.0%** of saw passes. Maximise randomness saves **2.9%** of saw
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Minimise cuts saves **20.0%** of saw passes. Maximise randomness saves **2.5%** of saw
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passes against the original planner. For random flooring in the default
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4,800 × 3,600 mm room, 38 passes become **24** or **31**, respectively; both options use 76
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boards and have approximately 1.2% waste.
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Skirting drops from **1,447 to 1,436 passes**. It uses 521 boards instead of 513:
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cutting effort now takes precedence over waste, which rises from 9.28% to 10.68%.
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Eight cases improve and 76 tie.
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Skirting drops from **1,447 to 1,437 passes**. It uses 522 boards instead of 513:
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cutting effort now takes precedence over waste, which rises from 9.28% to 10.85%.
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Seven cases improve and 77 tie.
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For flooring, 78 cut-priority cases improve and six tie against the original planner.
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The bounded search does not establish global optimality.
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@ -70,14 +70,14 @@ numbers. A final bit-mixing step now spreads those candidates across the allowed
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| Metric | Cuts before | Cuts now | Random before | Random now |
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| ------------------------- | ----------: | -------: | ------------: | ---------: |
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| Near-H row pairs | 515 | 247 | 557 | **6** |
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| Saw passes | 1,741 | 1,741 | 1,994 | 2,113 |
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| Boards | 3,537 | 3,548 | 3,579 | 3,551 |
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| Waste | 7.57% | 7.85% | 8.66% | 7.94% |
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| Near-H row pairs | 515 | 269 | 557 | **6** |
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| Saw passes | 1,741 | 1,741 | 1,994 | 2,122 |
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| Boards | 3,537 | 3,548 | 3,579 | 3,550 |
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| Waste | 7.57% | 7.85% | 8.66% | 7.91% |
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| Default-room near-H pairs | 17 | 17 | 11 | **0** |
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| Default-room saw passes | 24 | 24 | 30 | 31 |
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Appearance priority removes **98.9%** of near-H pairs for **6.0%** more cuts than the
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Appearance priority removes **98.9%** of near-H pairs for **6.4%** more cuts than the
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previous iteration. All six remaining pairs are in `forced-alternation`, whose
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600 mm minimum pieces force alternating starts. It improves 79 cases and ties five
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under the corrected objective. Ten additional room seeds also produce zero near-H pairs.
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@ -96,19 +96,15 @@ this beside the laying-pattern choice. Both frozen baselines remain unchanged.
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searching offcuts for pieces requiring both factory ends.
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3. Repack completed boundary blanks, reserving exact complementary factory ends
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first. Preserve the original placement and cutting order within each source board.
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4. Try bounded swaps of interchangeable rectangular rows. Accept only a lower
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pattern penalty with unchanged cuts, stock and geometry coverage.
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5. Polish all surviving completed candidates, retaining the best result.
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6. Preserve end remnants during search instead of trimming them immediately.
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4. Polish all surviving completed candidates, retaining the best result.
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5. Preserve end remnants during search instead of trimming them immediately.
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This alone improves 56 cut-priority cases and saves another 99 passes after the
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earlier improvements. Final packing can still combine non-exact blanks.
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7. When repetition remains, compare an immediate-reuse search as well. This improves
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6. When repetition remains, compare an immediate-reuse search as well. This improves
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five appearance-priority cases. All searches share their clipping cache, and the
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two UI choices select from the completed results. Selection itself does not rerun
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the optimiser.
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8. Compare exact three-piece skirting fills with the original packing. This improves
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two cases for a small additional calculation cost.
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9. Add the board-scale H penalty and mix the offset hash. Search size and geometry
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7. Add the board-scale H penalty and mix the offset hash. Search size and geometry
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constraints stay unchanged. Before/after drawings were checked for the default
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rectangle, fireplace and large floor, alongside the numeric metrics.
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@ -130,3 +126,22 @@ without an error; temporary stock is repacked before enforcing the board limit.
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Tests enforce aggregate cutting budgets, broad H avoidance and physical invariants.
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The original metrics and cases remain fixed; the new H metric has its own frozen
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baseline so the correction does not rewrite the earlier results.
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## Simplification tradeoffs
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Removing row-swap polishing preserves all 1,741 cuts-first passes. Across the 84
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cases, appearance-first passes change from 2,113 to 2,122 (+0.43%), boards from 3,551
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to 3,550, and the legacy penalty from 346 to 350. Cuts-first near-H pairs change
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from 247 to 269; appearance-first remains at six, all in the forced-alternation case.
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Removing the exact three-piece skirting packing variant changes 1,436 passes to
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1,437 and 521 boards to 522. Both frozen historical baselines remain unchanged.
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The conditional immediate-reuse search stays: removing it introduced a near-H pair
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outside the forced-alternation case. Distinct room-label and cut-preview placement
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strategies also stay; their bounds and collision primitives are shared. There is
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not enough evidence to replace these strategies without losing useful behavior.
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Tests retain physical invariants, the two option priorities, near-H avoidance,
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and aggregate budgets relative to the original baseline (at least 19% fewer
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cuts-first passes; appearance-first and skirting use fewer passes than originally).
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They no longer freeze the exact totals of a particular heuristic iteration.
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@ -58,7 +58,6 @@ export function plannerCases(): PlannerCase[] {
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name: 'angled',
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project: {
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...angled.project,
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version: defaultProject().version,
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flooring: { ...defaultProject().flooring, ...angled.project.flooring },
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} as Project,
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},
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@ -66,7 +65,6 @@ export function plannerCases(): PlannerCase[] {
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name: 'angled-f8',
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project: {
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...angledF8.project,
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version: defaultProject().version,
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flooring: { ...defaultProject().flooring, ...angledF8.project.flooring },
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} as Project,
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},
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