public BlobCollection(List <Blob> blobs, ISector sector)
{
borderWay = new Way();
borderWay.id = -10;
borderWay.refs = new List <long>()
{
-900, -901, -902, -903, -900
}; // arbitrary for now, but ccw for land
nodes.Add(-900, new Vector2d(0, 0));
nodes.Add(-901, new Vector2d(0, 1));
nodes.Add(-902, new Vector2d(1, 1));
nodes.Add(-903, new Vector2d(1, 0));
this.blobs = blobs;
this.sector = sector;
this.gridPointInfo = OSMMetaFinal.GetGridPointInfo(sector);
// initialize
ISector rootSector = sector.GetRoot();
foreach (var blob in blobs)
{
if (blob.type != "OSMData")
{
continue;
}
// build node data
for (int i = 0; i < blob.pBlock.primitivegroup.Count; i++)
{
var pGroup = blob.pBlock.primitivegroup[i];
for (int j = 0; j < pGroup.dense.Count; j++)
{
var d = pGroup.dense[j];
for (int k = 0; k < d.id.Count; k++)
{
double longitude = .000000001 * (blob.pBlock.lon_offset + (blob.pBlock.granularity * d.lon[k]));
double latitude = .000000001 * (blob.pBlock.lat_offset + (blob.pBlock.granularity * d.lat[k]));
nodes[d.id[k]] = sector.ProjectToLocalCoordinates(new LongLat(longitude * Math.PI / 180, latitude * Math.PI / 180).ToSphereVector());
}
}
}
}
}
private SectorBounds GetSectorBounds(GraphicsDevice graphicsDevice, ISector rootSector)
{
// apparently we don't want to call this after changing our render target
double w = graphicsDevice.Viewport.Width;
double h = graphicsDevice.Viewport.Height;
var leftArc = camera.GetArc(graphicsDevice, 0, h, 0, 0);
var rightArc = camera.GetArc(graphicsDevice, w, 0, w, h);
var topArc = camera.GetArc(graphicsDevice, 0, 0, w, 0);
var bottomArc = camera.GetArc(graphicsDevice, w, h, 0, h);
List <SphereArc> arcs = new List <SphereArc>();
if (leftArc != null)
{
arcs.Add(leftArc);
}
if (topArc != null)
{
arcs.Add(topArc);
}
if (rightArc != null)
{
arcs.Add(rightArc);
}
if (bottomArc != null)
{
arcs.Add(bottomArc);
}
Circle3 visible = camera.GetUnitSphereVisibleCircle(graphicsDevice);
double minX, maxX, minY, maxY;
if (arcs.Count > 0)
{
int cnt = arcs.Count;
// try and construct the arc segments that connect our disconnected arcs if they are
for (int i = 0; i < cnt; i++)
{
SphereArc arc1 = arcs[i];
SphereArc arc2 = arcs[(i + 1) % cnt];
Vector3d close1 = arc1.stop;
Vector3d close2 = arc2.start;
if ((close1 - close2).Length() > 0.01)
{
Vector3d halfway = (close1 + close2).Normalized();
if (close1.Cross(halfway).Dot(camera.GetPosition(graphicsDevice)) > 0)
{
halfway = -halfway;
}
arcs.Add(new SphereArc(visible, close1, halfway, true));
arcs.Add(new SphereArc(visible, halfway, close2, true));
}
}
minX = arcs.Min(x => x.Min(y => rootSector.ProjectToLocalCoordinates(y).X));
maxX = arcs.Max(x => x.Max(y => rootSector.ProjectToLocalCoordinates(y).X));
minY = arcs.Min(x => x.Min(y => rootSector.ProjectToLocalCoordinates(y).Y));
maxY = arcs.Max(x => x.Max(y => rootSector.ProjectToLocalCoordinates(y).Y));
}
else
{
minX = visible.Min(x => rootSector.ProjectToLocalCoordinates(x).X);
maxX = visible.Max(x => rootSector.ProjectToLocalCoordinates(x).X);
minY = visible.Min(x => rootSector.ProjectToLocalCoordinates(x).Y);
maxY = visible.Max(x => rootSector.ProjectToLocalCoordinates(x).Y);
}
if (rootSector is MercatorSector)
{
if (camera.IsUnitSpherePointVisible(graphicsDevice, new Vector3d(0, 0, 1)))
{
minY = 0;
minX = 0;
maxX = 1;
}
if (camera.IsUnitSpherePointVisible(graphicsDevice, new Vector3d(0, 0, -1)))
{
maxY = 1;
minX = 0;
maxX = 1;
}
}
return(new SectorBounds(Math.Max(minX, 0), Math.Min(maxX, 1), Math.Max(minY, 0), Math.Min(maxY, 1)));
}