# Synopsis

PDX_MSGT gdx_EvalPlanePnt(long option, T_GDX_PLANE *gdx_plane, double uval, double vval, MTH_3DPNT point)

# Purpose

Evaluate a point on a GDX plane

# Description

At a given pair of parameter values, evaluates a point on a GDX plane entity.

# Input

## option

### GDX_UNNORM

Unnormalize the parameter values

### GDX_FROMLEFT

Evaluate the point from the left

## gdx_plane

The GDX plane entity structure pointer

## uval

The surface U parameter value to evaluate

## vval

The surface V parameter value to evaluate

# Output

## point

The XYZ 3D evaluated point location

# Return

          GDX_NOERR
          GDX_PARMOUTOFRANGE
          Low level error return
          .fi