Overview | Statement List | Example
SPROPF(obj,u,v)
Returns the surface parameters, the point on the surface, the first and second partial derivatives, the unit normal, and the radii of curvatures.
This statement returns a twenty element array containing the point (1-3), the first derivative with respect to u (4-6), the first derivative with respect to v (7-9), the second derivative with respect to u (10-12), the second derivative with respect to v (13-15), the unit normal (16-18), and the radii of curvature [(19) = maximum radius and (20) = minimum radius]. For more information on radius of curvature, see Info->Analysis->Face Analysis in the Gateway Online Help.
The following statements also allow you to obtain similar data:
SPARF allows you to obtain the parameters of a face at a given point.
SPOSF, SNORF, SDDUF, and SDDVF allow you to calculate the point, normal, and first derivatives on a face given a parameter.
|
Parameter |
Description |
|
obj |
Object identifier of face. |
|
u |
U parameter. |
|
v |
V parameter. |