Evaluate the curve position, tangency, and normal at a given length or ratio.
Note: This command uses output arguments. C# and some
scripting languages (such as JScript, PerlScript and Python) don't support arguments passed by reference so you
need to use the best workaround for your situation:
For scripting languages this command returns an ISIVTCollection
which you can use to get the output arguments.
For C# you can use the XSIApplication.ExecuteCommand method to call this command. ExecuteCommand
packs the output arguments into a C# System.Object containing an Array of the output arguments (see
Calling Commands from C#).
EvaluateCurveAt( InputObj, Value, [Local], [PosX], [PosY], [PosZ], [TanX], [TanY], [TanZ], [NorX], [NorY], [NorZ] ); |
Parameter | Type | Description |
---|---|---|
InputObj | String | Curve to evaluate. |
Value | Double | A percentage or a length, depending on the value of the Percentage parameter. |
Local | Boolean |
True to evaluate at a certain percentage along the curve, False to evaluate at a specific length. Default Value: False |
PosX | Double | Returns the X component of the postion of the evaluated point |
PosY | Double | Returns the Y component of the Postion of the evaluated point |
PosZ | Double | Returns the Z component of the Postion of the evaluated point |
TanX | Double | Returns the X component of the Tangent of the evaluated point |
TanY | Double | Returns the Y component of the Tangent of the evaluated point |
TanZ | Double | Returns the Z component of the Tangent of the evaluated point |
NorX | Double | Returns the X component of the Normal of the evaluated point |
NorY | Double | Returns the Y component of the Normal of the evaluated point |
NorZ | Double | Returns the Z component of the Normal of the evaluated point |
'This example shows how to evaluate a curve by percentage. newscene dim posx, posy, posz, tanx, tany, tanz, normx, normy, normz CreatePrim "Spiral", "NurbsCurve" ' Evaluate at a point 50% along the curve length set rtn = EvaluateCurveAt( "Spiral", .5, True, posx, posy, posz, tanx, tany, tanz, normx, normy, normz ) logmessage "Position : ("& posx & ", " & posy & ", " & posz & ")" logmessage "tangent : ("& tanx & ", " & tany & ", " & tanz & ")" logmessage "Normal : ("& normx & ", " & normy & ", " & normz & ")" |