【C# MSCE】 方接圆

我写了个函数简单演示了一下如何创建需要的基本体，您可以参考一下：

        public static void CreateRectToCirc(double rectA, double rectB, double length, double circRadi)
        {
            double uorPerMe = Session.Instance.GetActiveDgnModel().GetModelInfo().UorPerMeter;
            DgnBoxDetail dgnBoxDeta = new DgnBoxDetail(new DPoint3d(circRadi * uorPerMe, 0, 0), new DPoint3d(-rectA/2*uorPerMe, -rectB / 2 * uorPerMe, length * uorPerMe),
                DVector3d.UnitX, DVector3d.UnitY, 0, 0, rectA * uorPerMe, rectB * uorPerMe, true);
            SolidPrimitive solidPri = SolidPrimitive.CreateDgnBox(dgnBoxDeta);
            Element eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();

            dgnBoxDeta = new DgnBoxDetail(new DPoint3d(-circRadi * uorPerMe, 0, 0), new DPoint3d(-rectA / 2 * uorPerMe, -rectB / 2 * uorPerMe, length * uorPerMe),
                DVector3d.UnitX, DVector3d.UnitY, 0, 0, rectA * uorPerMe, rectB * uorPerMe, true);
            solidPri = SolidPrimitive.CreateDgnBox(dgnBoxDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();

            dgnBoxDeta = new DgnBoxDetail(new DPoint3d(0, circRadi * uorPerMe,0), new DPoint3d(-rectA / 2 * uorPerMe, -rectB / 2 * uorPerMe, length * uorPerMe),
                DVector3d.UnitX, DVector3d.UnitY, 0, 0, rectA * uorPerMe, rectB * uorPerMe, true);
            solidPri = SolidPrimitive.CreateDgnBox(dgnBoxDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();


            dgnBoxDeta = new DgnBoxDetail(new DPoint3d(0, -circRadi * uorPerMe, 0), new DPoint3d(-rectA / 2 * uorPerMe, -rectB / 2 * uorPerMe, length * uorPerMe),
                DVector3d.UnitX, DVector3d.UnitY, 0, 0, rectA * uorPerMe, rectB * uorPerMe, true);
            solidPri = SolidPrimitive.CreateDgnBox(dgnBoxDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();

            DgnConeDetail dgnConeDeta = new DgnConeDetail(DPoint3d.Zero, new DPoint3d(-rectA / 2 * uorPerMe, -rectB / 2 * uorPerMe, length * uorPerMe), DVector3d.UnitX,
                DVector3d.UnitY, circRadi * uorPerMe, 0, true);
            solidPri = SolidPrimitive.CreateDgnCone(dgnConeDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();

            dgnConeDeta = new DgnConeDetail(DPoint3d.Zero, new DPoint3d(rectA / 2 * uorPerMe, rectB / 2 * uorPerMe, length * uorPerMe), DVector3d.UnitX,
                DVector3d.UnitY, circRadi * uorPerMe, 0, true);
            solidPri = SolidPrimitive.CreateDgnCone(dgnConeDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();



            dgnConeDeta = new DgnConeDetail(DPoint3d.Zero, new DPoint3d(-rectA / 2 * uorPerMe, rectB / 2 * uorPerMe, length * uorPerMe), DVector3d.UnitX,
                DVector3d.UnitY, circRadi * uorPerMe, 0, true);
            solidPri = SolidPrimitive.CreateDgnCone(dgnConeDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();


            dgnConeDeta = new DgnConeDetail(DPoint3d.Zero, new DPoint3d(rectA / 2 * uorPerMe, -rectB / 2 * uorPerMe, length * uorPerMe), DVector3d.UnitX,
                DVector3d.UnitY, circRadi * uorPerMe, 0, true);
            solidPri = SolidPrimitive.CreateDgnCone(dgnConeDeta);
            eleSolid = DraftingElementSchema.ToElement(Session.Instance.GetActiveDgnModel(), solidPri, null);
            eleSolid.AddToModel();
        }

5340.dgn

我用老师的代码生成了一个圆接方， 然后手动画了个包围着这个圆接方的立方体，依然不能剪切。

报错显示：“The Feature: "Difference #3" cannot be created with current settings and geometry.”。这是为什么呢

剪切干什么？画出来的基本体您做个union不就是您想要的目标模型了嘛

我的最终目标模型是褐色和灰色的那个元素，是通过立方体剪切一个方接圆得到的。

先将所有的基本体union成一个整体再去做剪切。

先将所有的基本体union成一个整体再去做剪切。

郭老师，反馈个问题，这段代码Union后，在形体内有可能会出现一个“空洞”。用外部的实体布尔减这个形体，就可能会出现一个“孤岛”。程序需要针对这个可能的情况提前做处理。

对，确实会出现，这种情况就得特殊处理了。