public bool isIntersecting(Polygon polygonToCheck)
{
//check line intersections
foreach (Line line in lines)
{
foreach (Line lineToCheck in polygonToCheck.lines)
{
if (line.isIntersecting(lineToCheck))
{
return true;
}
}
}
//check bb inside
if (((boundingBox.westExtent >= polygonToCheck.boundingBox.westExtent) && (boundingBox.westExtent <= polygonToCheck.boundingBox.eastExtent)) || ((boundingBox.eastExtent >= polygonToCheck.boundingBox.westExtent) && (boundingBox.eastExtent <= polygonToCheck.boundingBox.eastExtent)))
{
if (((boundingBox.southExtent >= polygonToCheck.boundingBox.southExtent) && (boundingBox.southExtent <= polygonToCheck.boundingBox.northExtent)) || ((boundingBox.northExtent >= polygonToCheck.boundingBox.southExtent) && (boundingBox.northExtent <= polygonToCheck.boundingBox.northExtent)))
{
return true;
}
}
//and outside
if (((polygonToCheck.boundingBox.westExtent >= boundingBox.westExtent) && (polygonToCheck.boundingBox.westExtent <= boundingBox.eastExtent)) || ((polygonToCheck.boundingBox.eastExtent >= boundingBox.westExtent) && (polygonToCheck.boundingBox.eastExtent <= boundingBox.eastExtent)))
{
if (((polygonToCheck.boundingBox.southExtent >= boundingBox.southExtent) && (polygonToCheck.boundingBox.southExtent <= boundingBox.northExtent)) || ((polygonToCheck.boundingBox.northExtent >= boundingBox.southExtent) && (polygonToCheck.boundingBox.northExtent <= boundingBox.northExtent)))
{
return true;
}
}
return false;
}
public void generateRegion(string regionFile)
{
string currentTile = filePath;
using (StreamReader sr = new StreamReader(currentTile))
{
float currentWest = 0;
float currentEast = 0;
float currentNorth = 0;
float currentSouth = 0;
switch (Path.GetExtension(currentTile).ToLower())
{
#region ASC
case ".asc":
string currentLine = sr.ReadLine();
//determine the delimeter
char delimiter = ';';
if (currentLine.Contains(','))
{
delimiter = ',';
}
else if (currentLine.Contains(' '))
{
delimiter = ' ';
}
else if (currentLine.Contains('\t'))
{
delimiter = '\t';
}
string[] currentLineItems = currentLine.Split(delimiter);
float[] currentLineCoords = new float[2];
currentLineCoords[0] = float.Parse(currentLineItems[0]);
currentLineCoords[1] = float.Parse(currentLineItems[1]);
currentWest = currentLineCoords[0];
currentEast = currentLineCoords[0];
currentNorth = currentLineCoords[1];
currentSouth = currentLineCoords[1];
while (sr.Peek() >= 0)
{
currentLine = sr.ReadLine();
currentLineItems = currentLine.Split(delimiter);
currentLineCoords[0] = float.Parse(currentLineItems[0]);
currentLineCoords[1] = float.Parse(currentLineItems[1]);
if (currentLineCoords[0] < currentWest)
{
currentWest = currentLineCoords[0];
}
if (currentLineCoords[0] > currentEast)
{
currentEast = currentLineCoords[0];
}
if (currentLineCoords[1] < currentSouth)
{
currentSouth = currentLineCoords[1];
}
if (currentLineCoords[1] > currentNorth)
{
currentNorth = currentLineCoords[1];
}
}
break;
#endregion
#region DEM
case ".dem":
char[] buffer = new char[1024]; // size of A Record
sr.Read(buffer, 0, 1024);
float[] sw_coord = new float[2];
float[] nw_coord = new float[2];
float[] ne_coord = new float[2];
float[] se_coord = new float[2];
sw_coord[0] = (float)ParseDouble(buffer, 546);
sw_coord[1] = (float)ParseDouble(buffer, 570);
nw_coord[0] = (float)ParseDouble(buffer, 594);
nw_coord[1] = (float)ParseDouble(buffer, 618);
ne_coord[0] = (float)ParseDouble(buffer, 642);
ne_coord[1] = (float)ParseDouble(buffer, 666);
se_coord[0] = (float)ParseDouble(buffer, 690);
se_coord[1] = (float)ParseDouble(buffer, 714);
// find west extent
if (sw_coord[0] < nw_coord[0])
{
currentWest = sw_coord[0];
}
else
{
currentWest = nw_coord[0];
}
// find east extent
if (se_coord[0] > ne_coord[0])
{
currentEast = se_coord[0];
}
else
{
currentEast = ne_coord[0];
}
// find south extent
if (sw_coord[1] < se_coord[1])
{
currentSouth = sw_coord[1];
}
else
{
currentSouth = se_coord[1];
}
// find north extent
if (nw_coord[1] > ne_coord[1])
{
currentNorth = nw_coord[1];
}
else
{
currentNorth = ne_coord[1];
}
break;
#endregion
}
this.tileName = Path.GetFileNameWithoutExtension(currentTile);
this.filePath = currentTile;
List<Point> points = new List<Point>();
points.Add(new Point(currentWest, currentNorth));
points.Add(new Point(currentEast, currentNorth));
points.Add(new Point(currentEast, currentSouth));
points.Add(new Point(currentWest, currentSouth));
shape = new Polygon(points);
if (!Directory.Exists(Path.GetDirectoryName(filePath))) Directory.CreateDirectory(Path.GetDirectoryName(filePath));
using (StreamWriter sw = new StreamWriter(regionFile))
{
foreach (Point p in points)
{
sw.WriteLine("{0} {1}", p.x, p.y);
}
}
}
}
private void loadRegionFile(string regionFile)
{
using (StreamReader sr = new StreamReader(regionFile))
{
List<Point> points = new List<Point>();
while (sr.Peek() >= 0)
{
string currentLine = sr.ReadLine();
string[] currentLineItems = currentLine.Split(' ');
float x = float.Parse(currentLineItems[0]);
float y = float.Parse(currentLineItems[1]);
points.Add(new Point(x, y));
}
shape = new Polygon(points);
}
}
