如何在视口上绘制brep实体的边界框？

Question

我想画一个选定实体的边框。我可以逐行绘制它，但是我看到它提供了BoundingBox，但我无法让它工作。我不知道它如何将box添加到theModel，以便绘制它。

 theModel.SelectionChanged += (s, e) =>
             {
                 foreach(var selecteditem in e.AddedItems)
                     if(selecteditem.Item is Entity entity)
                         selectedEntities.Add(entity);

                 foreach (var selecteditem in e.RemovedItems)
                     if (selecteditem.Item is Entity entity)
                         selectedEntities.Remove(entity);

                 foreach(var ent in selectedEntities)
                 {
                     if(ent is Brep brep)
                     {
                         brep = (Brep)ent;
                        var box = new BoundingBox(font, 6666, true, false, brep.BoxMin, brep.BoxMax);
                     }
                 }
                 
                 theModel.Invalidate();
            
             };

Answer 1

BoundingBox类仅为模型的包围框设置设计。