Commit Graph

5 Commits

Author SHA1 Message Date
fbbd3e7277 refactor: rewrite triangulation using Triangle library (constrained Delaunay + quality refinement)
- Replace scipy.spatial.Delaunay with Shewchuk's Triangle (PSLG-based)
- Boundary conforming: PSLG constrains edges along inset contour + hole keepout rings
- Quality: min angle 25°, no slivers
- Per-triangle density-based area refinement (s_min=20, s_max=80)
- Clean boundary plotting (no more crooked v1 line resampling)
- Triangulation plot shows inset contour (red dashed) + keepout rings (orange dashed)
- Add sandbox2_brain_input.json geometry file
2026-02-17 17:14:11 +00:00
239e2f01a9 tune(brain): uniform triangulation + bigger spacing for r_f=6mm fillets
- Switched to uniform triangulation (no density-adaptive refinement for
  initial pass — saves that for stress-informed iterations)
- s_min=45mm, s_max=55mm (was 12/35) — larger triangles fit 6mm fillets
- Boss keepout circles: 12 segments (was 32) — less boundary clutter
- Fillet must be >= 80% of r_f at every corner or pocket is skipped
- Result: 75 pockets, 481 NX entities, min fillet 4.85mm, mass 4066g
- adaptive_density=True param enables density refinement for future stress iterations
2026-02-16 20:51:20 +00:00
30981fa066 fix(brain): enforce r_f=6mm minimum, reject pockets that can't fit fillets
- Default r_f raised from 1.5mm to 6mm (machining constraint)
- Default min_pocket_radius raised to 6mm
- Pockets that can't fit r_f at any corner (within 80% tolerance) are
  skipped entirely — left solid for more stiffness in tight areas
- Result: 26 pockets (was 432), 187 NX entities (was 13,061)
- Min fillet radius: 4.88mm, all >= 4.8mm (80% of 6mm)
- Mass: 4,601g (was 3,480g — more solid = heavier but manufacturable)
2026-02-16 20:42:46 +00:00
e4651c9a40 Adaptive isogrid: min triangle area filtering and circular hole bosses 2026-02-16 01:11:53 +00:00
4bec4063a5 feat: add adaptive isogrid tool — project foundations
- Python Brain: density field, constrained Delaunay triangulation,
  pocket profiles, profile assembly, validation modules
- NX Hands: skeleton scripts for geometry extraction, AFEM setup,
  per-iteration solve (require NX environment to develop)
- Atomizer integration: 15-param space definition, objective function
- Technical spec, README, sample test geometry, requirements.txt
- Architecture: Python Brain + NX Hands + Atomizer Manager
2026-02-16 00:01:35 +00:00