The following options are available when you select the Advanced method in the Fix drop-down list of the Convert to NURBS command. These settings enable you to have the maximum control on the surface continuity and precision.
| Boundary continuity |
Enables you to select the continuity order for the endpoints of the resulting curve. the maximum value allowed is 7. (See Continuity Types for details on continuity). The continuity order at the endpoints is to be set as the first condition, as once it is set the internal continuity order for the selected curves (Continuity, see below) is automatically set to the same degree. |
| Continuity |
Enables you to select the continuity order for the internal points of the resulting curve. Once the continuity order at the endpoints (Boundary continuity, see above) has been set, the internal continuity will automatically be set to the same value, according to the choice you've made. If you select Maximum, the resulting entity will have the maximum continuity value at the internal knots, which is the entity degree minus 1 (high knot continuity, NURBS multiplicity = 1). For example if the entity degree is 7, continuity at internal knots will be 6. In general, the resulting entity will be much smoother. The Keep Initial Degree check box will also be activated. |
| Degree | Enables you to define the degree for the resulting curve. |
| Position |
Enables you to set the tolerance value to be used in case of positional continuity, in millimeters or inches, depending on the current unit of measure. It is the difference between the real positional continuity and the one you can obtain. |
| Max. No. of Arcs | Enables you to control the number of arcs, affecting the accuracy of the result:
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| Arcs | Enables you to define the number of arcs for the resulting curve. |