Entity Faces and Edges

[CBenghi]

From @miosepayo on February 24, 2016 20:3

Hi,

I plan to retrieve faces and edges (not triangulated) for physical entity (Wall, Beam etc ...). I guess this is releated to XBimShapeInstance but after searched the code for couple of day but don't get the best to way to achieve this. Any help ?

Is this related to MeshGeometry3DExtensions read method ? Case command for faces is empty ...

Thanks for your work on this project.

Copied from original issue: xBimTeam/XbimWindowsUI#25

[CBenghi]

From @miosepayo on March 8, 2016 10:23

Hello,

Any news/plans on this one ?

Best regards

[salvatore84]

Hello,

Any news on this issue?

Best regards

[martin1cerny]

You can investigate Xbim3DModelContext to see how xBIM handles geometry processing.

[SteveLockley]

If you look at the test cases in the geometry engine you will see how to get the BREP model for any shape in IFC, it is typically as simple as

1. Create an instance of XbimGeometryEngine
2. Obtain an Ifc 3D geometry entity from the model
3. Call the appropriate geometry creator method for the 3D shape you have retrieved

In pseudo code
var geomEngine = new XbimGeometryEngine();
var extrudedSolid = model.Instances[123] as IIfcExtrudedAreaSolid;
IXbimSolid brepSolid = geomEngine.CrateSolid(extrudedSolid);

You will find IXbimSolid exposes all the properties you need for shell, face, edge, vertex exploration