# Synopsis

PDX_MSGT igeo_ApproxSetTol(double tolerance)

# Purpose

Set the approximation tolerance

# Description

Sets the approximation tolerance to be used for approximating IGES entities when the IGEO_TOLERANCE approximation option has been set or the IGEO_NUM_OF_POINTS_PER_SEG option has been set.

# Input

## tolerance

The approximation tolerance > 0.0 unless the IGEO_NUM_OF_POINTS_PER_SEG option is set then the tolerance >= 0.0

# Return

          IGEO_NOERR
          IGEO_INVALIDTOLERANCE
          IGEO_NOAPPROXDATA
          .fi