Family Editor Line Subcategory Question

[kathey1]

This my be a silly question but i've always wondered what the difference is between [Cut] & [Projection] ?? Can somebody explain please ?

[dkoch]

For family categories that are cuttable, the Cut graphics are used if the object is being cut by the cut plane in the current view. The Projection graphics will be used if the object is beyond the cut plane. So, if you had two identical objects and created a section view, if one object fell on the section cut plane and the other was visible, but beyond the cut plane, the one on the cut plane would be drawn using the Cut graphics while the one beyond the section cut plane would be drawn using the Projection graphics. The usual graphic convention would have the Cut graphics done with a heavier lineweight than the Projection graphics.

[kathey1]

So where would I tend to use these 2 lines when creating families ?

[dkoch]

A given Object Style, Graphic Override or Line Style can be assigned two different Line Weights, one for Projection and one for Cut. They can both be the same, if you want, but typically (for major objects that can be cut, anyway), the Cut lineweight is heavier than the Projection lineweight. For loadable families that can be cut, solid (extruded) geometry will use the associated lineweight, depending upon whether that geometry is cut or is beyond the cut plane.

If you are drawing Model or Symbolic lines in a family, the lineweight is not assigned automatically; you choose whether you want the Cut lineweight or Projection lineweight for the Category/Subcategory you are using for a given line.