SurfaceEvaluator.getFirstDerivatives Method
Parent Object:
SurfaceEvaluatorDefined in namespace "adsk::core" and the header file is <Core/Geometry/SurfaceEvaluator.h>
Description
Get the first derivatives of the surface at the specified parameter positions.
Syntax
"surfaceEvaluator_var" is a variable referencing a SurfaceEvaluator object.
(returnValue, partialsU, partialsV) = surfaceEvaluator_var.getFirstDerivatives(parameters) |
#include <Core/Geometry/SurfaceEvaluator.h
// Declare the output arguments.
Point2D[] parameters;
Vector3D[] partialsU;
Vector3D[] partialsV;
boolean returnValue = surfaceEvaluator_var->getFirstDerivatives(parameters, partialsU, partialsV);
|
Return Value
| boolean |
Returns true if the first derivatives were successfully returned. |
Parameters
| parameters |
Point2D[] |
The array of parameter positions to get the surface first derivative at. Each parameter position must be within the range of the parameter extents as verified by isParameterOnFace. |
| partialsU |
Vector3D[] |
The output array of first derivative U partial vectors at each parameter position specified. The length of this array is equal to the length of the parameters array specified. |
| partialsV |
Vector3D[] |
The output array of first derivative V partial vectors at each parameter position specified. The length of this array is equal to the length of the parameters array specified. |
Version
Introduced in version August 2014
