Description For the specified explicit surface and u,v-parameters, returns point (x,y,z) and the vector (a,b,c) normal to the surface at that point.
Syntax success = ExplicitSurfEval ( n, u, v, x, y, z, a, b, c )
Parameters success (Boolean) Returns True if surface is evaluated and False if the surface was not evaluated or the specified point is not within the surface's valid u-v parameter limits.
n As Long Node number of Explicit surface.
u As Double U-parameter of Explicit Surface.
v As Double V-parameter of Explicit Surface.
x As Double X coordinate of point specified by u & v parameter.
y As Double Y coordinate of point specified by u & v parameter.
z As Double Z coordinate of point specified by u & v parameter.
a As Double X-component of vector normal to surface at point specified by u & v parameter.
b As Double Y-component of vector normal to surface at point specified by u & v parameter.
c As Double Z-component of vector normal to surface at point specified by u & v parameter.
Remarks For the specified explicit surface and u,v-parameters, returns point (x,y,z) and the vector (a,b,c) normal to the surface at that point. The length of vector (a,b,c) is proportional to the derivative of the explicit function.
See Also
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