public GPost Read(Stream MapStream, int SectionId)
{
var postData = ReadBytes(MapStream, _recordLength);
var ordinate = BitConverter.ToInt32(postData.Take(3).Concat(new byte[1]).ToArray(), 0);
var flags = postData[3];
var direction = DecodeDirection((flags >> 7) & 0x01);
var position = (PositionInSection)(flags & 0x03);
var crossing = (flags & (1 << 6)) > 0;
var point = new EarthPoint(BitConverter.ToInt32(postData, 4) * 10e-9 * 180 / Math.PI,
BitConverter.ToInt32(postData, 8) * 10e-9 * 180 / Math.PI);
var childrenStartAddress = SubInt(postData, 12, 3);
var post = new GPost(ordinate, point, direction, position, SectionId, crossing);
var previousPosition = MapStream.Position;
MapStream.Seek(childrenStartAddress, SeekOrigin.Begin);
var tracksCount = MapStream.ReadByte();
for (var i = 0; i < tracksCount; i++)
{
var track = _trackReader.Read(MapStream);
if (track != null)
{
post.Tracks.Add(track);
}
}
MapStream.Seek(previousPosition, SeekOrigin.Begin);
return(post);
}
private static IEnumerable <PositionedGObject> PositeObjects(GSection sec, GPost post)
{
GPost p2 = sec.Posts
.Where(pp => (int)post.Direction * (post.Ordinate - pp.Ordinate) > 0)
.OrderBy(pp => (int)post.Direction * (post.Ordinate - pp.Ordinate)).FirstOrDefault();
if (p2 == null)
{
yield break;
}
double l = post.Point.DistanceTo(p2.Point);
foreach (var o in post.Tracks.First().Objects)
{
double ratio = (o.Ordinate - post.Ordinate) / l;
var o_point =
new EarthPoint(
(1 - ratio) * post.Point.Latitude + ratio * p2.Point.Latitude,
(1 - ratio) * post.Point.Longitude + ratio * p2.Point.Longitude);
yield return(new PositionedGObject()
{
Object = o, Point = o_point
});
}
}
private static IEnumerable<PositionedGObject> PositeObjects(GSection sec, GPost post)
{
GPost p2 = sec.Posts
.Where(pp => (int)post.Direction * (post.Ordinate - pp.Ordinate) > 0)
.OrderBy(pp => (int)post.Direction * (post.Ordinate - pp.Ordinate)).FirstOrDefault();
if (p2 == null) yield break;
double l = post.Point.DistanceTo(p2.Point);
foreach (var o in post.Tracks.First().Objects)
{
double ratio = (o.Ordinate - post.Ordinate) / l;
var o_point =
new EarthPoint(
(1 - ratio) * post.Point.Latitude + ratio * p2.Point.Latitude,
(1 - ratio) * post.Point.Longitude + ratio * p2.Point.Longitude);
yield return new PositionedGObject() { Object = o, Point = o_point };
}
}
public KilometerPostMapElement(GPost Post)
: base(Post.Point)
{
this.Post = Post;
SectionBrush = Brushes.Aquamarine;
}
