/// <summary>
/// Compares two objects for geomtric equality
/// </summary>
/// <param name="a"></param>
/// <param name="b">object to compare with</param>
/// <returns></returns>
public static bool GeometricEquals(this IfcRepresentationItem a, IfcRepresentationItem b)
{
if (a is IfcSolidModel)
{
return(((IfcSolidModel)a).GeometricEquals(b));
}
else if (a is IfcBooleanResult)
{
return(((IfcBooleanResult)a).GeometricEquals(b));
}
else if (a is IfcConnectedFaceSet)
{
return(((IfcConnectedFaceSet)a).GeometricEquals(b));
}
else if (a is IfcFaceBasedSurfaceModel)
{
return(((IfcFaceBasedSurfaceModel)a).GeometricEquals(b));
}
else if (a is IfcShellBasedSurfaceModel)
{
return(((IfcShellBasedSurfaceModel)a).GeometricEquals(b));
}
else if (a is IfcPlane)
{
return(((IfcPlane)a).GeometricEquals(b));
}
else
{
// return false;
throw new XbimGeometryException("Unsupported solid geometry type " + a.GetType().Name);
}
}
/// <summary>
/// Returns a Hash Code for the geometric properties of this object
/// </summary>
/// <param name="repItem"></param>
/// <returns></returns>
public static int GetGeometryHashCode(this IfcRepresentationItem repItem)
{
if (repItem is IfcSolidModel)
{
return(((IfcSolidModel)repItem).GetGeometryHashCode());
}
else if (repItem is IfcBooleanResult)
{
return(((IfcBooleanResult)repItem).GetGeometryHashCode());
}
else if (repItem is IfcConnectedFaceSet)
{
return(((IfcConnectedFaceSet)repItem).GetGeometryHashCode());
}
else if (repItem is IfcFaceBasedSurfaceModel)
{
return(((IfcFaceBasedSurfaceModel)repItem).GetGeometryHashCode());
}
else if (repItem is IfcShellBasedSurfaceModel)
{
return(((IfcShellBasedSurfaceModel)repItem).GetGeometryHashCode());
}
else if (repItem is IfcPlane)
{
return(((IfcPlane)repItem).GetGeometryHashCode());
}
else if (repItem is IfcBoundingBox)
{
return(((IfcBoundingBox)repItem).GetGeometryHashCode());
}
else
{
throw new XbimGeometryException("Unsupported solid geometry type " + repItem.GetType().Name);
}
}
public IXbimShapeGeometryData Mesh(IfcRepresentationItem shape)
{
var fbm = shape as IfcFaceBasedSurfaceModel;
if (fbm != null)
{
return(Mesh(fbm));
}
var sbm = shape as IfcShellBasedSurfaceModel;
if (sbm != null)
{
return(Mesh(sbm));
}
var cfs = shape as IfcConnectedFaceSet;
if (cfs != null)
{
return(Mesh(cfs));
}
var fbr = shape as IfcFacetedBrep;
if (fbr != null)
{
return(Mesh(fbr));
}
throw new ArgumentException("Unsupported representation type for tessellation, " + shape.GetType().Name);
}