# Synopsis

PDX_MSGT igeo_EvalCurveProps(long option, MDA_PTR db_ptr, double tval, IGEO_CURVE_PROPS *props)

# Purpose

Evaluate properties of an IGES curve entity

# Description

At a given parameter value between 0.0 and 1.0 inclusive, evaluate properties on the IGES curve entity. These properties include the 3D point location, tangent, and curvature at the specified parameter value.

# Input

## option

Option (not used)

## db_ptr

The IGES curve entity database pointer

## tval

The parameter value to evaluate (0.0 - 1.0)

# Output

## props

The curve properties at the evaluation parameter

# Return

          IGEO_NOERR
          Low level error return
          .fi