Direct Modeling

Direct Modeling is the CAD capability of editing geometry by interacting directly with faces, edges, and features — pushing, pulling, rotating, or replacing them — without requiring a feature history or sketch-driven parametric tree. CIMdata describes it as design development in which “users interact directly with geometric elements… in a WYSIWYG manner.”

What it covers

• Push/pull face editing with automatic propagation to adjacent geometry.
• Live constraint inference — coplanar, concentric, equal-radius — applied at edit time.
• History-free operation — no rollback timeline, edits are immediate.
• Multi-CAD reuse — directly editing imported (often dumb) geometry from other systems.
• Hybrid workflows — Solid Edge’s Synchronous Technology and NX’s Synchronous Modeling combine direct edits with selective parametric capture.

Trade-offs vs feature modeling

Faster ad-hoc edits and graceful handling of imported geometry, at the cost of losing the design-intent record that feature trees provide. Many discrete-manufacturing teams use direct modeling for concept and downstream MCAD, parametric/feature modeling for highly engineered components.

Relationships (see sidebar)

• Part of CAD 3D Design.
• Supports CAD Design and Concept Design — particularly when concepts arrive as neutral imports.
• Implemented by Solid Edge (Synchronous), NX (Synchronous Modeling), Creo (Creo Elements/Direct), and Onshape.