ArcEngine生成矩形緩衝區

這裏生成緩衝區肯定是根據點進行生成的，說是生成緩衝區其實是根據點生成面。具體思路如下：
首先根據點獲取要生成矩形緩衝區的四個頂點的座標，然後將這四個點生成面即可得到所謂的矩形緩衝區。

              //首先獲取要生成緩衝區的點
                IPoint pPoint = new PointClass();
                pPoint.X = cPointList[i].point.X;
                pPoint.Y = cPointList[i].point.Y;
                //獲取生成的緩衝區的四個頂點的座標
                IPointCollection pPC = new MultipointClass();
                for (int j = 0; j < 4; j++)
                {
                    IPoint pPoint1 = new PointClass();
                    if (j == 0)
                    {
                        pPoint1.X = pPoint.X - 2.55;
                        pPoint1.Y = pPoint.Y - 2.55;
                    }
                    if (j == 1)
                    {
                        pPoint1.X = pPoint.X - 2.55;
                        pPoint1.Y = pPoint.Y + 2.55;
                    } if (j == 2)
                    {
                        pPoint1.X = pPoint.X + 2.55;
                        pPoint1.Y = pPoint.Y + 2.55;
                    } if (j == 3)
                    {
                        pPoint1.X = pPoint.X + 2.55;
                        pPoint1.Y = pPoint.Y - 2.55;
                    }
                    pPC.AddPoint(pPoint1);
                }
              IGeometryCollection pGeometryCollection = new PolygonClass();
              Ring ring = new RingClass();
              object missing = Type.Missing;
              ring.AddPointCollection(Points);
              pGeometryCollection.AddGeometry(ring as IGeometry, ref missing, ref missing);
              IPolygon polyGonGeo = pGeometryCollection as IPolygon;
              polyGonGeo.Close();
              polyGonGeo.SimplifyPreserveFromTo();
              pGeo =polyGonGeo as IGeometry;
              //創建要素
              pFeatureBuffer = pFeaClaPolygon.CreateFeatureBuffer();
              pFeatureBuffer.Shape = pGeo;

結果圖：下圖爲點生成矩形緩衝區的最終成果。

這個是融合之後的圖形。

當然在進行頂點座標輸入的時候需要按照順序，不然就會出現下邊這種情況：