A normal projected curve lies on a surface. It is based on an original curve, which is projected onto the surface in the direction of the surface's normals.
You can use normal projected curves for trimming.
Trimming a surface with a normal projected curve
If the projection intersects the surface in two or more locations, the intersection closest to the seed point is the one that creates the curve.
To create a normal projected curve:
The NURBS object must contain at least one surface and one cruve.
If the curve can be projected onto the surface in the surface's normal direction, the projected curve is created. The original, parent curve can go "off the edge of the surface." The projected curve is created only where the projection and the surface intersect.
When on, trims the surface against the curve. When off, the surface isn’t trimmed.
If it's impossible to trim with this curve, the surface is displayed in the error color (orange by default). For example, the curve is unusable for trimming if it neither crosses the edge of the surface nor forms a closed loop.
When on, trims the surface against the curve. When off, the surface isn’t trimmed.
If it's impossible to trim with this curve, the surface is displayed in the error color (orange by default). For example, the curve is unusable for trimming if it neither crosses the edge of the surface nor forms a closed loop.