/// <summary>
/// Return an Entity that has a DisplayListCamera that contains point <paramref name="hitPoint"/>, or Null
/// if none matches.
/// </summary>
public Entity HitTestCamera(float3 hitPoint)
{
// world to screen
var env = EntityManager.World.TinyEnvironment();
DisplayInfo di = env.GetConfigData <DisplayInfo>();
Unity.Tiny.Core2D.Rect screenRect = new Unity.Tiny.Core2D.Rect(0.0f, 0.0f, (float)di.width, (float)di.height);
float2 screenSize = new float2((float)di.width, (float)di.height);
Entity r = Entity.Null;
float bestDepth = 0;
Entities.ForEach((Entity e, ref Camera2D c2d, ref DisplayListCamera dlc, ref LocalToWorld t) =>
{
float2 window = TransformHelpers.WorldToWindow(this, e, hitPoint, screenSize);
Unity.Tiny.Core2D.Rect cRect;
if (c2d.rect.IsEmpty())
{
cRect = new Unity.Tiny.Core2D.Rect(0, 0, 1, 1);
}
else
{
cRect = c2d.rect;
}
Unity.Tiny.Core2D.Rect camRect = screenRect.Region(cRect);
if (camRect.Contains(window))
{
if (r == Entity.Null || c2d.depth > bestDepth)
{
r = e;
bestDepth = c2d.depth;
}
}
});
return(r);
}