# Synopsis

PDX_BOOL gdx_NurbCurveInterIsTangent(long option, T_GDX_NURB_CURVE *cur1, double t1, T_GDX_NURB_CURVE *cur2, double t2, double tang_tol)

# Purpose

Determine if the intersection of 2 GDX NURB Curves is tangent

# Description

Given that two GDX NURB Curves intersect, determine if the intersections are tangent.

# Input

## option

Option (Not used)

## cur1

The first GDX NURB Curve intersected

## t1

The intersection parameter value for the first curve

## cur2

The second GDX NURB Curve intersected

## t2

The intersection paramter value for the second curve

## tang_tol

The tangent tolerance defined as the difference in the angle between the tangent vectors at the point of intersection in radians

# Return

          PDX_TRUE  = The intersection is tangent
          PDX_FALSE = The intersection is not tangent
          .fi