Intersect Curve with Plane
Insert 
Reference Geometry (Sketch
Level)
Use this command to create reference points
on the sketch plane where it intersects with a 3D curve (line, arc, curve,
edge, curve list, or sketch). If the curve is moved or modified the projected
reference point(s) will update the next time the active part or sketch
is updated. See the Notes below when intersecting a face edge.
Select
a curve (line, arc, curve, edge, curve list,
or sketch) that intersects the sketch plane.
Point/line
Use this option to select the display method when the intersecting curve is a face edge.
Tangent Line at Edge - Show the tangent line at the edge (default method).
Point at Edge - Show only the tangent point at the edge.
When the curve is an edge, a
small line is referenced into the sketch and not a point. The endpoint
of the line is the point of intersection with the sketch plane. The length
of the line has no meaning, but the direction of the line is the tangent
to the intersection curve between the plane and the face neighboring the
edge. If the edge has more than one neighboring face, one of the faces
is chosen.
This is especially useful when used in conjunction with the Variational
Sweep commands to create a swept feature that will remain tangent
with an existing face. Use the Point/Line command option to select the
method of display (tangent line at edge or point at edge.)
