public static Spectator Spectator(Point location, Vector viewDirection, Polyline headOutline = null, double majorRadius = 0.11, double minorRadius = 0.078)
{
if (location.IsNull() || viewDirection.IsNull())
{
return(null);
}
if (headOutline == null)
{
//create basic elliptical head form
List <Point> points = new List <Point>();
double theta = 2 * Math.PI / 16;
for (int i = 0; i <= 16; i++)
{
double x = minorRadius * Math.Cos(theta * i);
double y = majorRadius * Math.Sin(theta * i);
points.Add(Geometry.Create.Point(x, y, 0));
}
headOutline = Geometry.Create.Polyline(points);
}
if (!headOutline.IsPlanar() || !headOutline.IsClosed())
{
Reflection.Compute.RecordError("The reference headOutline must be closed and planar.");
return(null);
}
//create the head
Head head = Humans.Create.Head(location, viewDirection);
Spectator spectator = new Spectator()
{
Head = head
};
//local cartesian
Cartesian local = spectator.Cartesian();
//transform the reference head outline
TransformMatrix transform = Geometry.Create.OrientationMatrixGlobalToLocal(local);
spectator.HeadOutline = headOutline.Transform(transform);
return(spectator);
}
public static void HeadOutline(this Spectator spectator, Polyline newHeadOutline)
{
if (spectator == null || newHeadOutline.IsNull())
{
return;
}
if (!newHeadOutline.IsPlanar() || !newHeadOutline.IsClosed())
{
Reflection.Compute.RecordError("The reference headOutline must be closed and planar.");
return;
}
//local cartesian
Cartesian local = spectator.Cartesian();
//transform the reference head outline
TransformMatrix transform = Geometry.Create.OrientationMatrixGlobalToLocal(local);
spectator.HeadOutline = newHeadOutline.Transform(transform);
}