Members
| Member | Value | Description |
|---|---|---|
| CAD_RETURN_NORMAL_TO_CURVES | 1 | Return the normal to curves or, for surface boundaries, the surface normal. The curve normal is defined as the curve's second derivative vector negated. |
| CAD_RETURN_TANGENT_TO_CURVES | 0 | Return the tangent to curves (including boundaries). This is the default option. |