public void Update(CameraDirectionMovementTracker lastcamera, Matrix4 resmat, float _zn, bool names, bool discs, Color namecolour) // FOREGROUND no thread
{
_starnamesbusy = true; // from update to Transfertoforeground we are busy
if (_starnamesforeground.Count >= maxstarscached) // if we have too many, clean up, to free memory
{
List <LinkedListNode <StarNames> > removelist = new List <LinkedListNode <StarNames> >();
LinkedListNode <StarNames> pos = _starnamesforeground.First;
while (pos != null)
{
StarNames sys = pos.Value;
if (!sys.inview) // if not painting
{
removelist.Add(pos);
}
pos = pos.Next;
}
//Tools.LogToFile(String.Format("starnameupd Remove {0}", removelist.Count ));
//Console.WriteLine("Remove {0}", removelist.Count);
foreach (LinkedListNode <StarNames> rpos in removelist)
{
StarNames sys = rpos.Value;
sys.Dispose();
_starnamesforeground.Remove(rpos);
_starnamesbackground.Remove(sys.pos);
}
}
_lastcamera = lastcamera;
_resmat = resmat;
_znear = _zn;
_nameson = names;
_discson = discs;
_namecolour = namecolour;
nsThread = new System.Threading.Thread(NamedStars)
{
Name = "Calculate Named Stars", IsBackground = true
};
nsThread.Start();
}
private void NamedStars() // background thread.. run after Update. Thread never deletes, only adds to its own structures
{
try // just in case someone tears us down..
{
int lylimit = (int)(_starlimitly / _lastcamera.LastZoom);
lylimit = Math.Max(lylimit, 1);
int sqlylimit = lylimit * lylimit; // in squared distance limit from viewpoint
StarGrid.TransFormInfo ti = new StarGrid.TransFormInfo(_resmat, _znear, _glControl.Width, _glControl.Height, sqlylimit, _lastcamera.LastCameraPos);
SortedDictionary <float, StarGrid.InViewInfo> inviewlist = new SortedDictionary <float, StarGrid.InViewInfo>(new DuplicateKeyComparer <float>()); // who's in view, sorted by distance
//Stopwatch sw1 = new Stopwatch();sw1.Start(); Tools.LogToFile(String.Format("starnamesest Estimate at {0} len {1}", ti.campos, sqlylimit));
_stargrids.GetSystemsInView(ref inviewlist, 2000.0F, ti); // consider all grids under 2k from current pos.
//Tools.LogToFile(String.Format("starnamesest Took {0} in view {1}", sw1.ElapsedMilliseconds, inviewlist.Count));
float textscalingw = Math.Min(_starnamemaxly, Math.Max(_starnamesizely / _lastcamera.LastZoom, _starnameminly)); // per char
float starsize = Math.Min(Math.Max(_lastcamera.LastZoom / 10F, 1.0F), 20F); // Normal stars are at 1F.
//Console.WriteLine("Per char {0} h {1} sc {2} ", textscalingw, textscalingh, starsize);
foreach (StarNames s in _starnamesbackground.Values) // all items not processed
{
s.updatedinview = false; // only items remaining will clear this
}
_needrepaint = false; // assume nothing changes
int painted = 0;
//string res = ""; // used to view whats added/removed/draw..
foreach (StarGrid.InViewInfo inview in inviewlist.Values) // for all in viewport, sorted by distance from camera position
{
using (SQLiteConnectionSystem cn = new SQLiteConnectionSystem())
{
StarNames sys = null;
bool draw = false;
if (_starnamesbackground.ContainsKey(inview.position)) // if already there..
{
sys = _starnamesbackground[inview.position];
sys.updatedinview = true;
draw = (_discson && sys.paintstar == null && sys.newstar == null) ||
(_nameson && ((sys.nametexture == null && sys.newnametexture == null)));
painted++;
}
else if (painted < maxstars)
{
ISystem sc = _formmap.FindSystem(inview.position, cn); // with the open connection, find this star..
if (sc != null) // if can't be resolved, ignore
{
sys = new StarNames(sc, inview.position); // we keep position in here using same floats as inview so it will match
_starnamesbackground.Add(inview.position, sys); // add to our database
_starnamestoforeground.Add(sys); // send to foreground for adding
draw = true;
painted++;
//Tools.LogToFile(String.Format("starnamesest: push {0}", sys.Pos));
//res += "N";
}
}
else
{
break; // no point doing any more.. got our fill of items
}
if (draw)
{
_needrepaint = true; // changed a item.. needs a repaint
if (_nameson)
{
float width = textscalingw * sys.name.Length;
Bitmap map = DatasetBuilder.DrawString(sys.name, _namecolour, _starfont);
sys.newnametexture = TexturedQuadData.FromBitmap(map,
new PointData(sys.pos.X, sys.pos.Y, sys.pos.Z),
_lastcamera.Rotation,
width, textscalingw * 4.0F, _startextoffset + width / 2, 0);
sys.rotation = _lastcamera.Rotation; // remember when we were when we draw it
sys.zoom = _lastcamera.LastZoom;
}
if (_discson)
{
sys.newstar = new PointData(sys.pos.X, sys.pos.Y, sys.pos.Z, starsize, inview.AsColor);
}
}
}
}
foreach (StarNames s in _starnamesbackground.Values) // only items above will remain.
{
//if (s.inview != s.updatedinview) res += (s.updatedinview) ? "+" : "-";
_needrepaint = _needrepaint || (s.inview != s.updatedinview); // set if we change our mind on any of the items
s.inview = s.updatedinview; // copy flag over, causes foreground to start removing them
}
//if ( _needrepaint) Console.WriteLine(String.Format("starnamesest in view {0} limit {1} repaint {2} {3}", inviewlist.Count, lylimit, _needrepaint, res));
//Tools.LogToFile(String.Format("starnamesest added all delta {0} topaint {1}", sw1.ElapsedMilliseconds, painted));
}
catch (Exception ex)
{
System.Diagnostics.Trace.WriteLine("Exception watcher: " + ex.Message);
System.Diagnostics.Trace.WriteLine("Trace: " + ex.StackTrace);
}
_formmap.BeginInvoke((System.Windows.Forms.MethodInvoker) delegate // kick the UI thread to process.
{
_formmap.ChangeNamedStars();
});
}