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Parametric modeling

Feature trees & design intent.

Modeling

Overview

Parametric modeling defines geometry through dimensions and relationships so a design updates automatically when parameters change. It's the foundation of editable, reusable CAD models driven by a feature history tree.

How it works

Modeling
SketchFeatureParametrizeOutput2D profileparamsExtrudehistoryDriven dimsd = 2·rEditable model
ClientServiceEdgeData

Step by step, with examples

  1. 1

    2D profile

    • Start from a dimensioned base sketch.
  2. 2

    Extrude

    • Build 3D features from the sketch.
  3. 3

    Driven dims

    • Link dimensions to variables.
  4. 4

    Editable model

    • Change a parameter and rebuild.
    • Example: design table

Overview

Build models from a history of features driven by parameters and constraints so changes propagate predictably.

Common pitfalls

  • Under-constrained sketches
  • Fragile feature dependencies
  • Burying dimensions instead of using parameters

Where this content comes from

For full transparency, this content is curated and verified from these sources:

ASME Y14.5 GD&T standardParametric CAD vendor documentationOppZen-authored CAD design guides