Procedural Geometry

Generate geometry from a semantic contract and explicit coordinate frame. Treat polygon operations as the design model and triangle emission as the final compilation step. Do not declare an object complete until its topology, assembly relationships, semantic measurements, and fixed views all pass.

This skill contains exemplary examples and assets beyond descriptive guidance, they're worth studying, referencing, or even copying. Use them sufficiently when relevant and do NOT blindly skip them.

Craft loop

1. Define units, local/world frames, dimensions, bounds, primary profiles, topology intent, shell thickness, apertures, material slots, and triangle band.
2. Declare every required contact, support, clearance, penetration, reveal, moving envelope, and interaction datum.
3. Choose a modeling operation for each visible form: profile extrusion, inset, loft, revolve, sweep, direct-topology aperture, solidify, subdivision, bevel, or fillet.
4. Keep quads and n-gons through design. Preserve one named mesh per semantic part; do not weld unrelated parts or merge material slots yet.
5. Apply modifiers in a deliberate order, then clean inside each part, repair winding, assign a part-specific smooth angle, and emit triangles.
6. Run the polygon topology gate, then audit the named world assembly for coplanar overlap, defects, and substantial solid clashes.
7. Run builder-owned semantic checks, including support, openings, shell thickness samples, ergonomic clearances, and moving extrema.
8. Merge by material slot, audit again, and inspect fixed silhouettes, hidden sides, joints, interaction views, wireframe, normals, and grazing light.

Modeling bar