/******************************************/
/**** IElement2D ****/
/******************************************/
public static Point Centroid(this IElement2D element2D)
{
Point tmp = Geometry.Query.Centroid(element2D.IOutlineCurve());
double area = Geometry.Query.Area(element2D.IOutlineCurve());
double x = tmp.X * area;
double y = tmp.Y * area;
double z = tmp.Z * area;
List <PolyCurve> openings = Geometry.Compute.BooleanUnion(element2D.IInternalOutlineCurves());
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
});
}
/******************************************/
/**** IElement2D ****/
/******************************************/
public static double Area(this IElement2D element2D)
{
//TODO: make this work for PolyCurves (Booleans needed)
double result = element2D.IOutlineCurve().Area();
List <Polyline> openings = new List <Polyline>();
foreach (PolyCurve o in element2D.IInternalOutlineCurves())
{
Polyline p = o.ToPolyline();
if (p == null)
{
throw new NotImplementedException();
}
openings.Add(p);
}
foreach (Polyline p in openings.BooleanUnion())
{
result -= p.Area();
}
return(result);
}
/******************************************/
/**** IElement2D ****/
/******************************************/
public static double Area(this IElement2D element2D)
{
double result = element2D.IOutlineCurve().IArea();
List <PolyCurve> openings = element2D.IInternalOutlineCurves().BooleanUnion();
foreach (PolyCurve o in openings)
{
result -= o.Area();
}
return(result);
}
/******************************************/
/**** IElement2D ****/
/******************************************/
public static bool IsSelfIntersecting(this IElement2D element2D, double tolerance = Tolerance.Distance)
{
if (Geometry.Query.IIsSelfIntersecting(element2D.IOutlineCurve(), tolerance))
{
return(true);
}
foreach (PolyCurve internalOutline in element2D.IInternalOutlineCurves())
{
if (Geometry.Query.IIsSelfIntersecting(internalOutline, tolerance))
{
return(true);
}
}
return(false);
}
