/// <summary>
/// 获取Element法向量为normal的所有面
/// </summary>
/// <param name="element"></param>
/// <param name="normal">normal为空时,返回所有面</param>
/// <returns></returns>
public static IEnumerable <Face> GetFacesByNormal(Element element, XYZ normal = null)
{
var solids = GeometryUtils.GetSolids(element);
foreach (var solid in solids)
{
foreach (var face in GetFacesByNormal(solid, normal))
{
yield return(face);
}
}
yield break;
}
/// <summary>
/// 获得element的BoundingBoxXYZ
/// </summary>
/// <param name="element"></param>
/// <returns></returns>
public static BoundingBoxXYZ GetBoundingBox(this Element element)
{
if (null == element)
{
return(null);
}
// 获取实例的BoundingBox
if (element is FamilyInstance)
{
var bBox = new BoundingBoxXYZ()
{
Enabled = false
};
var solids = GeometryUtils.GetSolids(element);
foreach (var solid in solids)
{
if (solid.Faces.Size <= 0 || solid.Volume <= 1e-6)
{
continue;
}
foreach (Edge e in solid.Edges)
{
var crv = e.AsCurve();
bBox.ExpandToContain(crv.GetEndPoint(0));
bBox.ExpandToContain(crv.GetEndPoint(1));
}
}
return(bBox);
}
// 获取一般的BoundingBox
Options ops = new Options()
{
ComputeReferences = true,
DetailLevel = ViewDetailLevel.Fine
};
GeometryElement geoElem = element.get_Geometry(ops);
return(geoElem?.GetBoundingBox());
}
