How to determine the Edge Inclusion

[pmeigneux]

Hello

I am using the Custom Exporter to extract 3D geometry. I am able to retrieve the surface of the Revit components with the sequence of edges associated.

I would like to determine for a specific surface if a sequence of edges is included in another (see pictures below).

The red area represents the Surface and the blue and yellow represent the series of edges associated to this Surface.

In the first case, I succeed to determine that the Series of Edges 2 is included in the first one by comparing the min and max values of the (X;Y) coordinates of the Edge groups.

In the second case, this comparison approach is working.

Do you have any method to solve this cover this case?

Regards

[pmeigneux]

Update:

The second case is not working. Do you have any idea to resolve it?

Thanks

[JimJia]

Dear pmeigneux,

You can use solid operation to determine the inclusion.

Please see codes below:

/// <summary>
        ///  determine the two loop is inclusion or not
        /// </summary>
        /// <param name="loop1">edge loop</param>
        /// <param name="loop2">edge loop</param>
        /// <param name="normal">the normal of surface</param>
        /// <returns></returns>
        public bool IsIncluded(CurveLoop loop1, CurveLoop loop2, XYZ normal)
        {
            Solid solid1 = GeometryCreationUtilities.CreateExtrusionGeometry(new List<CurveLoop>() { loop1 }, normal, 1);
            Solid solid2 = GeometryCreationUtilities.CreateExtrusionGeometry(new List<CurveLoop>() { loop2 }, normal, 1);

            Solid intersectedSolid = BooleanOperationsUtils.ExecuteBooleanOperation(solid1, solid2, BooleanOperationsType.Intersect);

            Transform t = null;

            return ExporterIFCUtils.AreSolidsEqual(solid2, intersectedSolid, out t) || ExporterIFCUtils.AreSolidsEqual(solid1, intersectedSolid, out t);
        }

Hope the codes can solve your issue.

[pmeigneux]

Hi Jimjia,

Thank you for your reply.

But for ExporterIFCUtils, which dll to use?

Philippe.

[pmeigneux]

I'm use Revit 2018, 2017,2016 and 2015.

I'm test : Autodesk.Revit.DB.IFC.ExporterIFCUtils.AreSolidsEqual

Philippe

[JimJia]

Dear Philippe,

It is Autodesk.Revit.DB.IFC.ExporterIFCUtils.AreSolidsEqual in RevitAPIIFC.dll

[pmeigneux]

Hi,

Thank you. An other question foir you. How find Normal for all face type (for planar is simple, but for other ?).

Philippe.

[JimJia]

Hi Philippe,

If face is not planar, the normal is different according to location where the point is, you can get the normal at that point by Face.ComputeNormal(UV point)

[pmeigneux]

Ok but for this function, witch point (u,V) use for calculate the normal ?

[JimJia]

Hi Philippe,

The normal is different at different UV point of the non-planar face.

You can not get a common face normal of a non-planar face like planar face's.

[pmeigneux]

Accept solution for Planar Face.

But for other Faces Types not solution..

Philippe.