Hi Mike, the use case is plotting where a sonar is/was and how far it was looking. The requirement is to comfortably plot a few days of this data. A GPS update rate of a few Hz translates into on the order of a million little lines. The sonar looks left and right "port and starboard". Each side needs to be colored differently.The length of the lines are typically 10-500meters. I need to be able to plot "live" as the points are coming in and also from recording.
Sample code:
class Example
{
const string uniqueKey = "side";
const int uniquePort = 0;
const int uniqueStar = 1;
readonly GraphicsLayer layer;
public Example()
{
var renderer = new UniqueValueRenderer();
layer = new GraphicsLayer()
{
Renderer = renderer,
RenderingMode = GraphicsRenderingMode.Static,
};
renderer.Fields.Add(uniqueKey);
renderer.Infos = new UniqueValueInfoCollection()
{
new UniqueValueInfo(uniquePort, new SimpleLineSymbol()
{ Color = Colors.Green, Style = SimpleLineStyle.Solid, Width = 1 } ),
new UniqueValueInfo(uniqueStar, new SimpleLineSymbol()
{ Color = Colors.Red, Style = SimpleLineStyle.Solid, Width = 1 } )
};
}
static Graphic Line(int uniqueVal, double direction, double meters, MapPoint innerPoint)
{
var outerPoint = GeometryEngine.GeodesicMove(innerPoint, meters, LinearUnits.Meters, direction);
var line = new Polyline(new MapPoint[] { innerPoint, outerPoint });
var attributesForUniqueValueRenderer =
new KeyValuePair<string, object>[] {
new KeyValuePair<string, object>(uniqueKey, uniqueVal) };
return new Graphic(line, attributesForUniqueValueRenderer);
}
static void CreateGraphics(...other params..., ref List<Graphic> list)
{
... add to list by eventually calling Line()...
}
public void Add(...)
{
List<Graphic> graphics = null;
CreateGraphics(..., ref graphics);
if (graphics != null)
{
layer.Dispatcher.InvokeAsync(() =>
{
if (layer.Status == LayerStatus.Initialized)
layer.Graphics.AddRange(graphics);
});
}
}
}
