ENH: patchCloudSet: new sampledSet for nearest point on cloud

applications/utilities/postProcessing/sampling/sample/sampleDict

@@ -49,6 +49,9 @@ formatOptions
 //      cell          : use cell-centre value only; constant over cells (default)
 //      cellPoint     : use cell-centre and vertex values
 //      cellPointFace : use cell-centre, vertex and face values.
+//      pointMVC      : use point values only (Mean Value Coordinates)
+//      cellPatchConstrained : use cell-centre except on boundary faces where
+//        it uses the boundary value. For use with e.g. patchCloudSet.
 // 1] vertex values determined from neighbouring cell-centre values
 // 2] face values determined using the current face interpolation scheme
 //    for the field (linear, gamma, etc.)
@@ -83,6 +86,7 @@ fields
 //      uniform, face, midPoint, midPointAndFace : start and end coordinate
 //      uniform: extra number of sampling points
 //      polyLine, cloud: list of coordinates
+//      patchCloud: list of coordinates and set of patches to look for nearest
 sets
 (
     lineX1
@@ -113,8 +117,21 @@ sets
         points  ((0.049 0.049 0.00501)(0.051 0.049 0.00501));
     }
 
+    somePatchPoints
+    {
+        // Sample nearest points on selected patches. Use with
+        // interpolations:
+        // - cell (cell value)
+        // - cellPatchConstrained (boundary value)
+        // - cellPoint (interpolated boundary value)
+        type    patchCloud;
+        axis    xyz;
+        points  ((0.049 0.099 0.005)(0.051 0.054 0.005));
+        patches (".*Wall.*");
+    }
 );
 
+
 // Surface sampling definition
 //
 // 1] patches are not triangulated by default
@@ -241,4 +258,5 @@ surfaces
     }
 );
 
+
 // *********************************************************************** //