public Rectangle GetEnvelope()
{
MPoint p1 = new MPoint(0, minX, minY);
MPoint p2 = new MPoint(0, maxX, maxY);
return(new Rectangle(p1, p2));
}
/// <summary>
/// 读点要素
/// </summary>
/// <param name="points"></param>
/// <param name="br"></param>
public static void readPoint(List <MPoint> points, BinaryReader br)
{
uint recordnumber;
uint contentlength;
int shapetype;
MPoint Cmpoint;
int i = 0;
while (br.BaseStream.Position < br.BaseStream.Length)
{
recordnumber = EndianConvert(br.ReadUInt32());
contentlength = EndianConvert(br.ReadUInt32());
shapetype = br.ReadInt32();
Cmpoint = new MPoint((int)recordnumber, 0, 0);
Cmpoint.X = br.ReadDouble();
Cmpoint.Y = br.ReadDouble();
points.Add(Cmpoint);
if (shapetype == 18)
{
br.ReadDouble();
br.ReadDouble();
}
else if (shapetype == 28)
{
br.ReadDouble();
}
i++;
}
}
public override List <int> QueryByLocat(Rectangle rect)
{
List <int> ids = new List <int>();
for (int i = 0; i < ElementCount; i++)
{
for (int j = 0; j < elements[i].PolygonCount; j++)
{
for (int k = 0; k < elements[i].List[j].PointCount; k++)
{
MPoint p = elements[i].List[j].List[k];
if (p.X >= rect.p1.X && p.X <= rect.p2.X && p.Y <= rect.p1.Y && p.Y >= rect.p2.Y)
{
ids.Add(elements[i].Id);
break;
}
}
if (ids.Count != 0 && ids.Last() == elements[i].Id)
{
break;
}
}
}
return(ids);
}
public Point ToScrPoint(MPoint mapPoint)
{
double x = mapPoint.X / ratio - offsetX;
double y = this.height - (mapPoint.Y / ratio + offsetY);
return(new Point(x, y));
}
/// <summary>
/// 在n之后插入点
/// </summary>
/// <param name="n"></param>
/// <param name="point"></param>
public void AddPoint(int n, MPoint point)
{
if (n < pointCount)
{
_list.Insert(n, point);
}
}
public override void Add(object element)
{
MPoint point = (MPoint)element;
point.Id = GenerateUniqueID();
elements.Add(point);
ElementCount++;
}
/// <summary>
/// 读取多边形要素
/// </summary>
/// <param name="br"></param>
public static void readPolygon(List <Polygon> polygonlayer, BinaryReader br)
{
uint recordnumber;
uint contentlength;
int shapetype;
int pointcount;
int numparts;
while (br.BaseStream.Position < br.BaseStream.Length)
{
MPoint Cpoint; //点
List <MPoint> mpointlist = new List <MPoint>(); //点列
PList pointlist = new PList(0, mpointlist);
List <int> parts = new List <int>();
recordnumber = EndianConvert(br.ReadUInt32());
contentlength = EndianConvert(br.ReadUInt32());
shapetype = br.ReadInt32();
//for (int box = 0; box < 4; box++)
//{
// br.ReadDouble();
//}
double minx = br.ReadDouble();
double miny = br.ReadDouble();
double maxx = br.ReadDouble();
double maxy = br.ReadDouble();
numparts = br.ReadInt32();
pointcount = br.ReadInt32();
for (int i = 0; i < numparts; i++)
{
parts.Add(br.ReadInt32());
}
parts.Add(pointcount);
Polygon polygons = new Polygon((int)recordnumber);
for (int i = 0; i < parts.Count - 1; i++)
{
mpointlist = new List <MPoint>();
pointlist = new PList(0, mpointlist);
for (int j = 0; j < parts[i + 1] - parts[i]; j++)
{
Cpoint = new MPoint(0, 0, 0);
Cpoint.X = br.ReadDouble();
Cpoint.Y = br.ReadDouble();
pointlist.AddPoint(Cpoint);
}
List <PList> listplist = new List <PList>();
listplist.Add(pointlist);
polygons.AddPolygon(pointlist);
}
polygons.PointCount = pointcount;
polygons.PolygonCount = numparts;
polygons.MinX = minx;
polygons.MinY = miny;
polygons.MaxX = maxx;
polygons.MaxY = maxy;
polygonlayer.Add(polygons);
}
}
public void AddPoint(int i, int n, MPoint input)
{
if (i < lineCount)
{
if (n < _list[i].PointCount)
{
_list[i].AddPoint(n, input);
}
}
}
public void EditPoint(int i, int n, MPoint input)
{
if (i < lineCount)
{
if (n < _list[i].PointCount)
{
_list[i].EditPList(n, input);
}
}
}
/// <summary>
/// 读取多点要素
/// </summary>
/// <param name="mpoint"></param>
public static void readMPoint(List <MultiPoint> multipoints, BinaryReader br)
{
uint recordnumber;
uint contentlength;
int shapetype;
while (br.BaseStream.Position < br.BaseStream.Length)
{
int pointcount;
MPoint Cpoint;
List <MPoint> pointlist = new List <MPoint>();
MultiPoint multipoint = new MultiPoint(0, pointlist);
multipoint.Id = multipoints.Count + 1;
recordnumber = EndianConvert(br.ReadUInt32());
contentlength = EndianConvert(br.ReadUInt32());
shapetype = br.ReadInt32();
for (int box = 0; box < 4; box++)
{
br.ReadDouble();
}
pointcount = br.ReadInt32();
for (int i = 0; i < pointcount; i++)
{
Cpoint = new MPoint(0, 0, 0);
Cpoint.X = br.ReadDouble();
Cpoint.Y = br.ReadDouble();
pointlist.Add(Cpoint);
if (shapetype == 18)
{
br.ReadDouble();
br.ReadDouble();
}
else if (shapetype == 28)
{
br.ReadDouble();
}
multipoint.AddPoint(Cpoint);
}
multipoints.Add(multipoint);
}
}
public void AddPoint(MPoint point)
{
_list.Add(point);
if (point.X > maxX)
{
maxX = point.X;
}
if (point.X < minX)
{
minX = point.X;
}
if (point.Y > maxY)
{
maxY = point.Y;
}
if (point.Y < minY)
{
minY = point.Y;
}
pointCount++;
}
public void EditPoint(int n, MPoint point)
{
if (n < pointCount)
{
_list[n].X = point.X;
_list[n].Y = point.Y;
}
if (point.X > maxX)
{
maxX = point.X;
}
if (point.X < minX)
{
minX = point.X;
}
if (point.Y > maxY)
{
maxY = point.Y;
}
if (point.Y < minY)
{
minY = point.Y;
}
}
public void CopyPoint(MPoint inputPoint)
{
this.id = inputPoint.Id;
this.x = inputPoint.X;
this.y = inputPoint.Y;
}
public Rectangle(MPoint point1, MPoint point2)
{
p1 = point1;
p2 = point2;
}