.\" @(#)PEXSetBFSurfaceInterpMethod.3 1.5 95/03/24 SMI;
.so man3/pex.macs
.TH PEXSetBFSurfaceInterpMethod 3 "May 1995" "Solaris PEXlib Reference Manual" ""
.SH NAME
PEXSetBFSurfaceInterpMethod - Set Back-Face Surface Interpolation Method
.SH SYNTAX
.HP
void PEXSetBFSurfaceInterpMethod\^(\^Display *\fIdisplay\fP\^, XID \fIresource_id\fP\^, PEXOCRequestType \fIreq_type\fP\^, int \fImethod\fP\^)
.SH PARAMETERS
.IP \fIdisplay\fP 1i
A pointer to a display structure returned by a successful
.B XOpenDisplay
call.
.IP \fIresource_id\fP 1i
The resource identifier of the renderer or structure.
.IP \fIreq_type\fP 1i
The request type for the output command (
.B PEXOCRender,
.B PEXOCStore,
.B PEXOCRenderSingle
or
.B PEXOCStoreSingle
).
.IP \fImethod\fP 1i
The back-facing surface interpolation method (
.B PEXSurfaceInterpNone,
.B PEXSurfaceInterpColor,
.B PEXSurfaceInterpDotProduct,
.B PEXSurfaceInterpNormal
).
.SH RETURNS
.LP
None
.SH DESCRIPTION
.\" indexing
.IX PEXSetBFSurfaceInterpMethod
.IX "Back-Face Surface" PEXSetBFSurfaceInterpMethod
.LP
This function creates an output primitive attribute which
sets the back-facing surface interpolation
.I method
attribute.
If the specified interpolation
.I method
is not supported,
.B PEXSurfaceInterpNone
is used.
Supported values for back-facing surface interpolation
.I method
are inquirable via
.BR PEXGetEnumTypeInfo (3) .
.SH ERRORS
.TP
.SB BadPEXRenderer
The specified renderer resource identifier is invalid.
.TP
.SB BadPEXStructure
The specified structure resource identifier is invalid.
.SH SEE ALSO
.LP
.nf
.BR PEXGetEnumTypeInfo (3)
.BR PEXSetIndividualASF (3)
.fi