.\" @(#)PEXSetSurfaceApprox.3 1.4 95/03/24 SMI;
.so man3/pex.macs
.TH PEXSetSurfaceApprox 3 "May 1995" "Solaris PEXlib Reference Manual" ""
.SH NAME
PEXSetSurfaceApprox - Set Surface Approximation Method
.SH SYNTAX
.HP
void PEXSetSurfaceApprox\^(\^Display *\fIdisplay\fP\^, XID \fIresource_id\fP\^,
PEXOCRequestType \fIreq_type\fP\^, int \fImethod\fP\^, double \fIutolerance\fP\^, double \fIvtolerance\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 surface approximation method (
.B PEXApproxImpDep,
.B PEXApproxConstantBetweenKnots,
.B PEXApproxWCChordalSize,
.B PEXApproxNPCChordalSize,
.B PEXApproxDCChordalSize,
.B PEXSurfaceApproxWCPlanarDev,
.B PEXSurfaceApproxNPCPlanarDev,
.B PEXSurfaceApproxDCPlanarDev,
.B PEXApproxWCRelative,
.B PEXApproxNPCRelative,
.B PEXApproxDCRelative
).
.IP \fIutolerance\fP 1i
The surface approximation tolerance in the u direction.
.IP \fIvtolerance\fP 1i
The surface approximation tolerance in the v direction.
.SH RETURNS
.LP
None
.SH DESCRIPTION
.\" indexing
.IX PEXSetSurfaceApprox
.LP
This function creates an output primitive attribute which
sets the surface approximation
.I method
attribute.
If the specified
.I method
is not supported,
.B PEXApproxImpDep
is used.
Supported values for surface approximation are inquirable via
.BR PEXGetEnumTypeInfo (3) .
The u and v tolerance values
are provided to indicate the desired accuracy of the approximation,
and are used in different ways for the different methods.
.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 PEXSetIndividualASF (3)
.BR PEXGetEnumTypeInfo (3)
.fi