public static Point3D?GetCentroid(IList <Point3D> polygon, out Plane3D?plane)
{
int count = polygon.Count;
Point3D point3D1 = polygon[0];
if (count < 3)
{
plane = new Plane3D?();
switch (count)
{
case 0:
return(new Point3D?());
case 1:
return(new Point3D?(polygon[0]));
case 2:
Point3D point3D2 = polygon[0];
return(new Point3D?(new Point3D(0.5 * (point3D1.X + point3D2.X), 0.5 * (point3D1.Y + point3D2.Y), 0.5 * (point3D1.Z + point3D2.Z))));
}
}
plane = Polygon3D.GetPlane(polygon);
if (!plane.HasValue)
{
return(new Point3D?());
}
Matrix4D matrix4D = Transformation4D.Translation(point3D1.X, point3D1.Y, point3D1.Z) * Transformation4D.GetArbitraryCoordSystem(plane.Value.Normal);
Matrix4D inverse = matrix4D.GetInverse();
Point2D point2D = Polygon3D.GetProjection2D(polygon, inverse).GetCentroid().Value;
return(new Point3D?(matrix4D.Transform(new Point3D(point2D.X, point2D.Y, 0.0))));
}
public Point3D?GetCentroid(out Plane3D?plane)
{
return(Polygon3D.GetCentroid((IList <Point3D>) this, out plane));
}
public Point3D?GetCentroid()
{
return(Polygon3D.GetCentroid((IList <Point3D>) this));
}
public Polygon2D GetProjection2D(Matrix4D projectionTransform)
{
return(Polygon3D.GetProjection2D((IList <Point3D>) this, projectionTransform));
}
public Plane3D?GetPlane()
{
return(Polygon3D.GetPlane((IList <Point3D>) this));
}
public Polygon3D(Polygon3D polyline)
: base((IEnumerable <Point3D>)polyline)
{
}
public static Point3D?GetCentroid(IList <Point3D> polygon)
{
Plane3D?plane;
return(Polygon3D.GetCentroid(polygon, out plane));
}
