Exemplo n.º 1
0
        /// <summary>
        /// 获取矩形属性
        /// </summary>
        public static RectangleData GetRectangleData(this Database db, ObjectId id)
        {
            RectangleData data = new RectangleData();

            if (db.IsRectangle(id))
            {
                PLineData plinedata = db.GetPLineData(id);
                for (int i = 0; i < 4; i++)
                {
                    Vector3d vec1 = plinedata.Vectors[i];
                    Vector3d vec2 = plinedata.Vectors[(i + 1) % 4];
                    if (vec1 == new Vector3d(1, 0, 0) && vec2 == new Vector3d(0, 1, 0))
                    {
                        data.IsClockWise    = false;
                        data.BasePointIndex = i;
                        data.BasePoint      = plinedata.VertexPoints[i];
                    }
                    else if (vec1 == new Vector3d(0, 1, 0) && vec2 == new Vector3d(1, 0, 0))
                    {
                        data.IsClockWise    = true;
                        data.BasePointIndex = i;
                        data.BasePoint      = plinedata.VertexPoints[i];
                    }
                }
                Point3d p0 = plinedata.VertexPoints[0];
                Point3d p2 = plinedata.VertexPoints[2];
                data.Width  = Math.Abs(p2.X - p0.X);
                data.Height = Math.Abs(p2.Y - p0.Y);
            }
            return(data);
        }
Exemplo n.º 2
0
        /// <summary>
        /// 判断多段线是否为矩形
        /// </summary>
        public static bool IsRectangle(this Database db, ObjectId id)
        {
            bool flag = false;

            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                // 获取图形对象
                Entity ent = trans.GetObject(id, OpenMode.ForWrite) as Entity;
                if (ent.GetType() == typeof(Polyline))
                {
                    db.PLinePurge(id);
                    PLineData plinedata = db.GetPLineData(id);
                    if (plinedata.VertexCount == 4)
                    {
                        if (plinedata.Vectors[0].DotProduct(plinedata.Vectors[1]).ToString() == "0" &&
                            plinedata.Vectors[1].DotProduct(plinedata.Vectors[2]).ToString() == "0" &&
                            plinedata.Vectors[2].DotProduct(plinedata.Vectors[3]).ToString() == "0")
                        {
                            flag = true;
                        }
                    }
                }
                trans.Commit();
            }
            return(flag);
        }
Exemplo n.º 3
0
        /// <summary>
        /// 获取多段线属性
        /// </summary>
        public static PLineData GetPLineData(this Database db, ObjectId Id)
        {
            PLineData data = new PLineData();

            using (Transaction trans = db.TransactionManager.StartTransaction())
            {
                Entity ent = trans.GetObject(Id, OpenMode.ForRead) as Entity;
                data.PLineId = Id;

                try
                {
                    Polyline pline = ent as Polyline;
                    data.StartPoint   = pline.StartPoint;
                    data.EndPoint     = pline.EndPoint;
                    data.Length       = pline.Length;
                    data.VertexCount  = pline.NumberOfVertices;
                    data.IsClosed     = pline.Closed;
                    data.VertexPoints = new Point3d[data.VertexCount];
                    data.Vectors      = new Vector3d[data.VertexCount];
                    for (int i = 0; i < data.VertexCount; i++)
                    {
                        data.VertexPoints[i] = pline.GetPoint3dAt(i);
                        data.Vectors[i]      = pline.GetFirstDerivative(pline.GetPoint3dAt(i)).GetNormal();
                    }
                }
                catch (Autodesk.AutoCAD.Runtime.Exception e)
                {
                    throw e;
                }
                trans.Commit();
            }
            return(data);
        }
Exemplo n.º 4
0
 /// <summary>
 /// 删除多段线中的多余点并将应闭合的多段线闭合
 /// </summary>
 public static void PLinePurge(this Database db, ObjectId id)
 {
     using (Transaction trans = db.TransactionManager.StartTransaction())
     {
         // 打开块表
         BlockTable bt = (BlockTable)trans.GetObject(db.BlockTableId, OpenMode.ForRead);
         // 打开块表记录
         BlockTableRecord btr = (BlockTableRecord)trans.GetObject(bt[BlockTableRecord.ModelSpace], OpenMode.ForRead);
         // 获取图形对象
         Entity ent = trans.GetObject(id, OpenMode.ForWrite) as Entity;
         if (ent.GetType() == typeof(Polyline))
         {
             Polyline  pline     = ent as Polyline;
             PLineData plinedata = db.GetPLineData(id);
             /// 删除多段线中的多余点
             if (plinedata.VertexCount > 2)
             {
                 // 为避免下标出现问题, 从下标最大处开始遍历
                 for (int i = plinedata.VertexCount - 2; i > 0; i--)
                 {
                     if (plinedata.Vectors[i - 1] == plinedata.Vectors[i])
                     {
                         btr.UpgradeOpen();
                         pline.RemoveVertexAt(i);
                         btr.DowngradeOpen();
                     }
                 }
             }
             // 重新读取
             plinedata = db.GetPLineData(id);
             if (plinedata.VertexPoints[0] == plinedata.VertexPoints[plinedata.VertexCount - 1])
             {
                 btr.UpgradeOpen();
                 pline.Closed = true;
                 pline.RemoveVertexAt(plinedata.VertexCount - 1);
                 btr.DowngradeOpen();
             }
         }
         trans.Commit();
     }
 }