public override void OnRender(Graphics g)
{
Matrix temp = g.Transform;
g.TranslateTransform(LocalPosition.X, LocalPosition.Y);
int length = 500;
// anti NaN
try
{
g.DrawLine(new Pen(Color.Red, 2), 0.0f, 0.0f, (float) Math.Cos((heading - 90)*deg2rad)*length,
(float) Math.Sin((heading - 90)*deg2rad)*length);
}
catch
{
}
//g.DrawLine(new Pen(Color.Green, 2), 0.0f, 0.0f, (float)Math.Cos((nav_bearing - 90) * deg2rad) * length, (float)Math.Sin((nav_bearing - 90) * deg2rad) * length);
g.DrawLine(new Pen(Color.Black, 2), 0.0f, 0.0f, (float) Math.Cos((cog - 90)*deg2rad)*length,
(float) Math.Sin((cog - 90)*deg2rad)*length);
g.DrawLine(new Pen(Color.Orange, 2), 0.0f, 0.0f, (float) Math.Cos((target - 90)*deg2rad)*length,
(float) Math.Sin((target - 90)*deg2rad)*length);
// anti NaN
try
{
g.RotateTransform(heading);
}
catch
{
}
g.DrawImageUnscaled(icon, icon.Width/-2 + 2, icon.Height/-2);
g.DrawString(sysid.ToString(), new Font(FontFamily.GenericMonospace, 15, FontStyle.Bold), Brushes.Red, -8,
-8);
g.Transform = temp;
{
double width =
(Overlay.Control.MapProvider.Projection.GetDistance(Overlay.Control.FromLocalToLatLng(0, 0),
Overlay.Control.FromLocalToLatLng(Overlay.Control.Width, 0)) * 1000.0);
double m2pixelwidth = Overlay.Control.Width / width;
GPoint loc = new GPoint((int)(LocalPosition.X - (m2pixelwidth * warn * 2)), LocalPosition.Y);
if (m2pixelwidth > 0.001 && warn > 0)
g.DrawArc(Pens.Orange,
new System.Drawing.Rectangle(
LocalPosition.X - Offset.X - (int)(Math.Abs(loc.X - LocalPosition.X) / 2),
LocalPosition.Y - Offset.Y - (int)Math.Abs(loc.X - LocalPosition.X) / 2,
(int)Math.Abs(loc.X - LocalPosition.X), (int)Math.Abs(loc.X - LocalPosition.X)), 0, 360);
loc = new GPoint((int)(LocalPosition.X - (m2pixelwidth * danger * 2)), LocalPosition.Y);
if (m2pixelwidth > 0.001 && danger > 0)
g.DrawArc(Pens.Red,
new System.Drawing.Rectangle(
LocalPosition.X - Offset.X - (int)(Math.Abs(loc.X - LocalPosition.X) / 2),
LocalPosition.Y - Offset.Y - (int)Math.Abs(loc.X - LocalPosition.X) / 2,
(int)Math.Abs(loc.X - LocalPosition.X), (int)Math.Abs(loc.X - LocalPosition.X)), 0, 360);
}
}
}
