CFD Online Discussion Forums - Patches interface

Dear Foamers,

I am working with a multiRegion geometry and I am finding it a bit difficult to set the different patches interfaces. Let's open the constant/region1/polyMesh/boudary file and let's analyze this part of the code:

Code:

    region1_to_region2

    {

        type            mappedWall;

        nFaces          150;

        startFace       48925;

        sampleMode      nearestPatchFace;

        sampleRegion    roof;

        samplePatch     roof_to_door;

        offsetMode      uniform;

        offset          (0 0 0);

    }

I would like to know what the different field mean.

Also, as far as the type, sampleMode and offsetMode fields are concerned, which are the different options?
Could you help?

Thanks a lot,

Samuele