Automatic Projection of Elements onto Workplane

In some cases, it is convenient to automatically create projections of 3D scene elements on the active workplane.

Automatic Creation of Projection Lines

When you select the Draw on Face command, projection lines of face contours are created on an automatically created workplane.

The lines are always auxiliary by default.

Automatically created projection lines of a face contour have all the parameters of projection lines: they are associatively rebuilt when the face is changed, they can be made basic, they can be used to create profiles and other 3D elements. Constraints can be created between projection lines and other lines.  Automatically created projection lines can be deleted. If necessary, they can be re-created using the Project Elements command and its Projection to Workplane option.

Automatic Creation of Projection Points

When creating sketch lines and construction lines, the Snap to 3D Elements icon is available in the bindings toolbar. With the active icon, you can bind to the projections of points of 3D elements. The centers of the edges (circles) and the midpoints and extreme points of the edges (segments and arcs) are projected. The points are projected along the normal to the active workplane, on which a 2D point is automatically created. On the workplane, 2D points created on the basis of the projections of 3D elements are indicated by a red triangular icon .

Bindings of sketch lines and construction lines to such points is preserved without creating constraints. The projected points are associatively rebuilt when the 3D model is changed.

If you need to perform more complex binding of constructions to 3D elements, you need to apply the Project Elements command and use constraints.