To Create a Datum Curve through Points that Lie on a Surface
To create a curve through points on a surface, all the points defined in the curve must use the spline connection type.
1. Click
Model >
Datum >
Curve >
Curve through Points. The
Curve through Points tab opens.
|  You can also select points to define the curve first, and then open the Curve through Points tab. |
2. To select points to define the curve, click the Placement tab, and perform these actions:
a. To add the first point to the curve definition, click the Point collector, and in the graphics window, select an existing point, vertex, or curve end.
b. To add additional points to the curve definition, click Add Point, click the Point collector, and in the graphics window, select a point, vertex, or curve end.
3. To create a curve that lies on a surface, click the Placement tab, and select the Place curve on surface check box.
4. To create a curve that can lie on a specific surface, select Lie on surface, click the Surface collector, and , select the surface
5. Click
.