How to draw circles or Line in UrhoSharp - xamarin

Question

am using urhosharp game engine from xamarim to develop a cross-platform game .... it was really good choice and compatible with WPF but I did not know how to draw shapes , I went through the guide and documentation and did not find a way maybe to draw circles,Rounded Shapes,annulus or any geometric type anyone knows or could help me . I would be very grateful .
Thanks in advance
I tried this piece of code but no circle appeared in the screen:
DebugRenderer debug = new DebugRenderer();
debug.AddCircle(new Vector3(50,50,0),new Vector3(100,25,0),50,Color.Magenta,2 ,true );
for (int i = 0; i < 512; ++i)
{
var start = new Vector3(i, 0, 0);
var end = new Vector3(i, 100, 0);
debug.AddLine(start, end, Color.White, false);
debug.AddCircle(start, end, 50f, Color.Red, i, false);
}
scene.AddComponent(debug);

Answer 1

Just want to note that DebugRenderRender is intended for debugging purposes. If you want to make DebugRenderer work you will need to subscribe to PostRenderUpdate like this:
Engine.SubscribeToPostRenderUpdate(args => YourMethodHandler);
Usually you will do that in your setup. And then YourMethodHandler is like:
protected void YourMethodHandler()
{
// this requires that you have already added a DebugRenderer
// component in your scene object
var debugRenderer = scene.GetComponent<DebugRenderer>();
if (debugRenderer != null)
{
// do your drawing code here
// to draw a rectangle for example:
var upperBound = new Vector3(-4.0f, 2.0f, 0.0f);
var lowerBound = new Vector3(4.0f, -2.0f, 0.0f);
debugRenderer.AddBoundingBox(
new BoundingBox(upperBound, lowerBound),
Color.White,
false);
}
}

Answer 2

To be more precise, it works only when implemented like this:
var dr = app.Scene.GetOrCreateComponent<DebugRenderer>();
app.Engine.PostRenderUpdate += (arg4) => {
app.Renderer.DrawDebugGeometry(false);
};
app.Renderer.BeginViewRender += (arg5) => {
dr.AddBoundingBox(new BoundingBox(-1000, 1000), Color.Blue);
dr.LineAntiAlias = true;
dr.AddTriangle(new Vector3(2,0,0), new Vector3(2,1,0), new Vector3(2,0,1), Color.Magenta, false);
dr.AddCircle(new Vector3(2,0,0), new Vector3(1,1,1), 5.0f, Color.Red);
};