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IReverseEvaluate Method (ISurface)

Gets the UV parameters at the specified location, which must be on the surface.

.NET Syntax

Visual Basic (Declaration) 
Function IReverseEvaluate( _
   ByVal PositionX As System.Double, _
   ByVal PositionY As System.Double, _
   ByVal PositionZ As System.Double _
) As System.Double
Visual Basic (Usage) 
Dim instance As ISurface
Dim PositionX As System.Double
Dim PositionY As System.Double
Dim PositionZ As System.Double
Dim value As System.Double
value = instance.IReverseEvaluate(PositionX, PositionY, PositionZ)
System.double IReverseEvaluate( 
   System.double PositionX,
   System.double PositionY,
   System.double PositionZ
System.double IReverseEvaluate( 
&   System.double PositionX,
&   System.double PositionY,
&   System.double PositionZ



X position on the surface


Y position on the surface


Z position on the surface

Return Value

Array of doubles describing the UV parameters


At parametric singularities, such as sphere poles, the non-degenerate parameter is returned as the lowest value in its range. To determine the UV range, call ISurface::Parameterization or ISurface::IParameterization.

IFace2::ReverseEvaluate and IFace2::IReverseEvaluate return corrected UV parameters for periodic surfaces; thus, you should use either of these methods when dealing with periodic surfaces.


See Also

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