# Synopsis

PDX_MSGT igeo_ApproxSetMesh(long option, int u_paths, int v_paths)

# Purpose

Set the IGES surface approximation mesh

# Description

Sets the approximation mesh to be used for linear approximation of surfaces if the surface is not set for facet approximation. The mesh is the count of constant (iso-parametric) surface curves in the U and V surface direction. The minimium mesh is 2 X 2 which approximates the surface boundary. By default, if the mesh property(406:5558) exists, the mesh values are used to define the UV path mesh.

# Input

## option

### IGEO_IGNOREMESHPROP

Ignore the 406:5558 property and only use the input UV path mesh defintion.

## u_paths

The number of U iso-parametric lines to approximate in V

## v_paths

The number of V iso-parametric lines to approximate in U

# Return

          IGEO_NOERR
          IGEO_INVALIDAPPXMESH
          IGEO_NOAPPROXDATA
          .fi