ZeroCAD BRep · M3.5 · IGES + Validity Check + Polish

1 · Example library

Pick

2 · Canonical document

— not validated —

3 · Export

— validity unchecked —

About these exports

STEP is the modern interoperable format — analytic BRep, re-opens losslessly in FreeCAD/SolidWorks/Fusion. IGES is the legacy alternative for aerospace and tooling shops that still standardise on it. STL is mesh-only for sanity checks. Validity status surfaces OCCT's BRepCheck_Analyzer result (feeds the IC-4 retry-with-feedback path).

5 · Schema notes

Click to expand the working schema

Working M2 schema (cross-checked vs the Patents-3 brief §4.2 and the parent-chat memory note; final reconciliation against the parent-chat zerocad-v5.html deferred to M2.5):

{
  "name": "string",
  "outer_geom": {
    "kind": "block" | "cylinder" |
            "extruded_polygon" | "truncated_cone",
    // block:            x, y, z   (extents, mm)
    // cylinder:         diameter, height
    // extruded_polygon: profile [[x,y],...] CCW closed,
    //                   height
    // truncated_cone:   radius_bottom, radius_top, height
  },
  "features": [
    {
      "id": "f1",
      "kind": "thru_hole|blind_hole|counter_bore|
              counter_sink|pocket|slot|fillet|
              chamfer|boss",
      "position": {"x":0,"y":0,"z":0},
      "axis":     {"x":0,"y":0,"z":1},
      // kind-specific fields documented in code.
    }
  ]
}

Convention: all dimensions in millimetres. Origin at part centre for blocks. Origin at base centre for cylinders / cones, axis along +Z by default. position for a hole = centre of the hole on the entry surface. axis for a hole = direction the hole goes into the part (so for a top-of-block hole, axis is {0,0,-1}).

faces—

tris—

verts—

project—

tess—

features—