Returns the Position and optionally U tangent, V Tangent,Normal
at a given UV value.
Note: This method uses output arguments. C# and some
scripting languages (such as JScript and PerlScript) don't support arguments passed by reference. However, there is a
alternate version of this method which is considered safe to use with C#, JScript and PerlScript:
NurbsSurface.EvaluatePosition2.
NurbsSurface.EvaluatePosition( Double in_dUValue, Double in_dVValue, Object& out_pPosition, Object& out_pUTangent, Object& out_pVTangent, Object& out_pNormal ); |
NurbsSurface.EvaluatePosition( UValue, VValue, [Position], [UTangent], [VTangent], [Normal] ); |
Parameter | Type | Description |
---|---|---|
UValue | Double | The UValue at which we want to evaluate the surface. |
VValue | Double | The VValue at which we want to evaluate the surface. |
Position | SIVector3 (contains the position) | Position at the given UV. |
UTangent | SIVector3 (contains the U tangent) | Tangent in U at the given UV. |
VTangent | SIVector3 (contains the V tangent) | Tangent in V at the given UV. |
Normal | SIVector3 (contains the normal) | Normal at the given UV. |
set oRoot = Application.ActiveProject.ActiveScene.Root set oSphere = oRoot.AddGeometry( "Sphere", "NurbsSurface" ) oSphere.ActivePrimitive.Geometry.Surfaces(0).EvaluatePosition _ 3.0, 4.0, oPosition,oUTangent,oUTangent,oNormal LogMessage "The position at 3.0, 4.0 is x :" & oPosition.x & _ " y: " & oPosition.y & " z: " & oPosition.z |