public override void OnRender(Graphics g)
{
Matrix temp = g.Transform;
g.TranslateTransform(LocalPosition.X, LocalPosition.Y);
g.RotateTransform(-Overlay.Control.Bearing);
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
{
float desired_lead_dist = 100;
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;
float alpha = ((desired_lead_dist * (float)m2pixelwidth) / radius) * rad2deg;
if (radius < -1 && alpha > 1)
{
// fixme
float p1 = (float)Math.Cos((cog) * deg2rad) * radius + radius;
float p2 = (float)Math.Sin((cog) * deg2rad) * radius + radius;
g.DrawArc(new Pen(Color.HotPink, 2), p1, p2, Math.Abs(radius) * 2, Math.Abs(radius) * 2, cog, alpha);
}
else if (radius > 1 && alpha > 1)
{
// correct
float p1 = (float)Math.Cos((cog - 180) * deg2rad) * radius + radius;
float p2 = (float)Math.Sin((cog - 180) * deg2rad) * radius + radius;
g.DrawArc(new Pen(Color.HotPink, 2), -p1, -p2, radius * 2, radius * 2, cog - 180, alpha);
}
}
catch
{
}
try
{
g.RotateTransform(heading);
}
catch
{
}
g.DrawImageUnscaled(icon, icon.Width/-2, icon.Height/-2);
g.Transform = temp;
}
}