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IGetBSurfParamsSize3 Method (ISurface)

Gets the allocation size necessary for Bsurface parameter data retrieval in a subsequent call to ISurface::IGetBSurfParams.

.NET Syntax

Visual Basic (Declaration) 
Function IGetBSurfParamsSize3( _
   ByVal WantCubic As Boolean, _
   ByVal WantNonRational As Boolean, _
   ByRef Range As Double, _
   ByVal Tolerance As Double, _
   ByRef Sense As Boolean _
) As Integer
Visual Basic (Usage) 
Dim instance As ISurface
Dim WantCubic As Boolean
Dim WantNonRational As Boolean
Dim Range As Double
Dim Tolerance As Double
Dim Sense As Boolean
Dim value As Integer
value = instance.IGetBSurfParamsSize3(WantCubic, WantNonRational, Range, Tolerance, Sense)
int IGetBSurfParamsSize3( 
   bool WantCubic,
   bool WantNonRational,
   ref double Range,
   double Tolerance,
   out bool Sense
int IGetBSurfParamsSize3( 
&   bool WantCubic,
&   bool WantNonRational,
&   double% Range,
&   double Tolerance,
&   [Out] bool Sense



True for surface to be a cubic, false for not


True if non-rational is needed, false if not; specifying true converts any surface type to a non-rational Bsurface; if you specify true, then you should only use this method for surfaces that are Bsurface or blend surface; otherwise, the underlying call is not made and the values returned from this are not initialized or contain the values from the last call

Array of 4 doubles describing the U,V Range

Tolerance, in meters, between the approximated b-spline surface and the underlying surface; the default value is 0.01 and should generally be reduced to the tolerance desired


Approximated b-spline surface is not always in the same direction as the original surface; if sense is true, then the underlying surface and the b-spline surface are in the same direction

Return Value

Size of the data set


Range contains the following values that can be obtained using ISurface::Parameterization or ISurface::IParameterization:

  • Range[0] & Range[2] are the lower bounds of the U & V surface parameters respectively.

  • Range[1] & Range[3] are the upper bounds of the U & V surface parameters respectively.


See Also


SolidWorks 2000 SP3, Revision Number 8.3

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