Which point lies on the surface of a NURBS object and does not have a modifiable weight value?

Which point lies on the surface of a NURBS object and does not have a modifiable weight value?

• A. EM Face
• B. Surface point
• C. Control Vertex
• D. Normal

Answer: (B)

In NURBS modeling, weights belong to the control points (CVs) that define the surface. Those CV weights influence how strongly each control point pulls the surface toward itself. The points that actually lie on the evaluated surface—the surface points—are computed positions and do not carry or expose a modifiable weight value. They are not anchors you weight; they’re the result of the NURBS evaluation given the CVs and their weights. A normal is simply a direction perpendicular to the surface at a point, not a position with a weight, and an EM Face isn’t a point on the surface. So the point that lies on the surface and has no adjustable weight is the surface point.

In NURBS modeling, weights belong to the control points (CVs) that define the surface. Those CV weights influence how strongly each control point pulls the surface toward itself. The points that actually lie on the evaluated surface—the surface points—are computed positions and do not carry or expose a modifiable weight value. They are not anchors you weight; they’re the result of the NURBS evaluation given the CVs and their weights. A normal is simply a direction perpendicular to the surface at a point, not a position with a weight, and an EM Face isn’t a point on the surface. So the point that lies on the surface and has no adjustable weight is the surface point.