public static Point Centroid(this IElement2D element2D)
{
Point tmp = Geometry.Query.Centroid(element2D.OutlineCurve());
double area = Geometry.Query.Area(element2D.OutlineCurve());
double x = tmp.X * area;
double y = tmp.Y * area;
double z = tmp.Z * area;
List <PolyCurve> openings = Geometry.Compute.BooleanUnion(element2D.InternalOutlineCurves());
foreach (ICurve o in openings)
{
Point oTmp = Geometry.Query.ICentroid(o);
double oArea = o.IArea();
x -= oTmp.X * oArea;
y -= oTmp.Y * oArea;
z -= oTmp.Z * oArea;
area -= oArea;
}
return(new Point {
X = x / area, Y = y / area, Z = z / area
});
}
public static double Area(this IElement2D element2D)
{
double result = element2D.OutlineCurve().IArea();
List <PolyCurve> openings = element2D.InternalOutlineCurves().BooleanUnion();
foreach (PolyCurve o in openings)
{
result -= o.Area();
}
return(result);
}
public static double Area(this IElement2D element2D)
{
double result = BH.Engine.Geometry.Query.Area(element2D.OutlineCurve());
List <PolyCurve> openings = element2D.InternalOutlineCurves().BooleanUnion();
foreach (PolyCurve o in openings)
{
result -= BH.Engine.Geometry.Query.Area(o);
}
return(result);
}
public static Plane FitPlane(this IElement2D element2D, bool externalOnly = false, double tolerance = Tolerance.Distance)
{
List <Point> controlPoints = element2D.OutlineCurve().ControlPoints();
if (!externalOnly)
{
foreach (PolyCurve internalOutline in element2D.InternalOutlineCurves())
{
controlPoints.AddRange(internalOutline.ControlPoints());
}
}
return(controlPoints.FitPlane(tolerance));
}
public static bool IsSelfIntersecting(this IElement2D element2D, double tolerance = Tolerance.Distance)
{
if (Geometry.Query.IIsSelfIntersecting(element2D.OutlineCurve(), tolerance))
{
return(true);
}
foreach (PolyCurve internalOutline in element2D.InternalOutlineCurves())
{
if (Geometry.Query.IIsSelfIntersecting(internalOutline, tolerance))
{
return(true);
}
}
return(false);
}
public static Point Centroid(this IElement2D element2D, double tolerance = Tolerance.Distance)
{
return(Geometry.Query.Centroid(new List <ICurve> {
element2D.OutlineCurve()
}, element2D.InternalOutlineCurves(), tolerance));
}
