Assertion: cutter | /r/HasProperty | tangent
Facets:
value: to the surface
type: LOCATION
value: at that point
type: TEMPORAL
Source sentences:
text: Start with a UV parametric point in a freeform surface, calculate the xyz point and the normal, and offset from the point along the normal in a way consistent with the tool definition so that the cutter is now tangent to the surface at that point.