A begins when you sketch lines, arcs, and other geometry on a . Constraints are automatically applied as you sketch. The sketch becomes a that is the basis for sketched features such as extrusions, revolutions, lofts, coils, or paths for sweep features. In drawings, sketch geometry creates symbols, title blocks, and borders.
Sketches often include and . Construction geometry is not part of the profile or path, but infers constraints. Reference geometry is usually part of a feature, such as an edge, or silhouette. You project it from the sketch of the feature to a new sketch.
- Constraints that specify orientation to the coordinate system: fixed-point, horizontal, and vertical. For example, lines that are nearly vertical are made vertical.
- Constraints that determine relationships between two elements: perpendicular, parallel, tangent, collinear, and concentric.
You can create proportional relationships between sketch curves. For example, if you set a dimension to equal half of another dimension, the proportions of the two curves remain the same if either changes.
For a feature, you sketch the most basic shape of the part, and then use a command to add volume to the sketch. For example, if the feature requires equal volume around an axis, choose Revolve. To add depth, choose Extrude. The feature you create the sketched profile.
You can select multiple profiles to create a single feature. For example, all sketches extruded or revolved together are a single feature, even if they do not intersect. You can reuse a sketch from another feature. In the browser, right-click the sketch, and then click Share Sketch.