如何偏移曲线？

• 回答：

          private void OffsetCurves()
          {
              MxDrawUtility mxUtility = new MxDrawUtility();
              MxDrawPoint getPt;
              MxDrawEntity ent = mxUtility.GetEntity(out getPt,"选择编移的曲线:");
              if (ent == null)
                  return;
  
              MxDrawCurve curve;
              if(ent is MxDrawCurve)
              {
                  curve = (MxDrawCurve)ent;
              }
              else
              {
                  MessageBox.Show("实体类型不对");
                  return;
              }
  
              MxDrawPoint getPt1 = (MxDrawPoint)(mxUtility.GetPoint(null, "点取偏移位置:"));
  
              if (getPt1 == null)
              {
                  MessageBox.Show("用户取消..");
                  return;
              }
  
              MxDrawPoint getPt2 = (MxDrawPoint)(mxUtility.GetPoint(getPt1, "点取偏移距离:"));
              if (getPt2 == null)
              {
                  MessageBox.Show("用户取消..");
                  return;
              }
  
              Double dis = (getPt1.x - getPt2.x) * (getPt1.x - getPt2.x) + (getPt1.y - getPt2.y) * (getPt1.y - getPt2.y);
              dis = Math.Sqrt(dis);
  
              MxDrawResbuf objId;
              if(curve.OffsetCurves(dis, getPt1, out objId) )
              {
                  MxDrawResbuf rbId = (MxDrawResbuf)objId;
                  MessageBox.Show("偏移生成的曲线个数:" + rbId.Count);
              }
  
              
              
          }