ORD路线两个linearElement中间插入CircularArc圆弧方法返回数组是空

下面是测试用例代码，您可以参考修改：

            BGEO.DPoint3d centerPoint = new BGEO.DPoint3d(1000, 1000, 1000);
            BGEO.DPoint3d centerPoint2 = new BGEO.DPoint3d(2000, 1000, 1000);
            BGEO.DPoint3d centerPoint3 = new BGEO.DPoint3d(3000, 1000, 1000);

            BGEO.DPoint3d point1 = new BGEO.DPoint3d(700.0, 1120.0, 0.0);
            BGEO.DPoint3d point2 = new BGEO.DPoint3d(1500.0, 1080.0, 0.0);
            BCG.Line line1 = new BCG.Line(point1, point2);

            BGEO.DPoint3d point3 = new BGEO.DPoint3d(0.0, 0.0, 0.0);
            BGEO.DPoint3d point4 = new BGEO.DPoint3d(4500.0, 1580.0, 2000.0);
            BCG.Line line2 = new BCG.Line(point3, point4);

            BCG.Spiral spiral1 = new BCG.Spiral(centerPoint, 0, 500, 199, 0.0, SpiralType.Clothoid, BCG.Hand.CounterClockwise);
            BCG.Spiral spiral2 = new BCG.Spiral(centerPoint, 0, 1000, 999, 0.0, SpiralType.Clothoid, BCG.Hand.CounterClockwise);

            double radius = 1000;
            double sweepAngle = 0.2;
            double startDirection = 0.1;
            
            CircularArc arc2 = new BCG.CircularArc(centerPoint3, radius, startDirection, sweepAngle);

            CircularArc[] results = CircularArc.CreateTangentToCircleThruPointRadius(arc, centerPoint3, centerPoint2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToLineThruPointRadius(line1, centerPoint3, centerPoint2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToLineThruPoint(line1, centerPoint3, centerPoint2, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToSpiralThruPointRadius(spiral1, centerPoint3, centerPoint2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToTwoLinesThruPoint(line1, line2, centerPoint3, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToTwoCirclesThruPoint(arc, arc2, centerPoint3, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToLineAndCircleThruPoint(line1, arc2, centerPoint3, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToLineAndCircleRadius(line1, arc2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToTwoLinesRadius(line1, line2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToTwoCirclesRadius(arc, arc2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

            //Needs Work
            //results = CircularArc.CreateTangentToSpiralTwoThruPoints(spiral2, centerPoint3, centerPoint2, 0.0001);
            //Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToLineTwoThruPoints(line1, centerPoint3, centerPoint2, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToCircleTwoThruPoints(arc2, centerPoint3, centerPoint2, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToTwoElementsThruPoint(arc, arc2, centerPoint3, 0.0001);
            Assert.IsNotNull(results[0]);

            results = CircularArc.CreateTangentToTwoElementsRadius(arc, arc2, 10000, 0.0001);
            Assert.IsNotNull(results[0]);

测试结果第1，6，10，13，14结果返回结果是0个，请问这个传半径的时候需要换算单位吗

按道理应该是需要的，你试试。