UG NX二次开发源码分享：使用java来显示曲线或者边的方向

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! B- t* n0 u: H1 kUG NX二次开发源码分享：使用java来显示曲线或者边的方向
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, ?" T3 q3 I8 y& ~, z如果你用C的ufun的话，应该很简单，java这么用，基本都一样！！！

5 K& {9 q& {) _% c static void showCurveDirection(NXObject theCurveOrEdge)
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    {
0 r7 u" K% Y, M        double[] limits = new double[2];
        UFVariant evaluator;
        EvaluateData start;

        evaluator = theUFSession.eval().initialize(theCurveOrEdge.tag());
! V' _% Q+ r# p        limits = theUFSession.eval().askLimits(evaluator);
        start = theUFSession.eval().evaluate(evaluator, 1, limits[0]);
        theUFSession.eval().free(evaluator);
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        Point3d startPoint = new Point3d(start.point[0], start.point[1], start.point[2]);
% b, P% J% }. _( f, r# L$ X9 F( V8 A        Vector3d dir = new Vector3d(start.derivatives[0], start.derivatives[1],
3 K8 m" ^5 ~2 N  Y2 K( F            start.derivatives[2]);
$ l" i! E0 ~/ @: b0 {: w        displayConehead(startPoint, dir, "Curve Direction");

    }

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