Shape-functions: added some support for eta-shape-functions (N-shape-functions)

Signed-off-by: Nicola Vigano <vigano@yoda.esrf.fr>

zUtil_Deformation/gtDefShapeFunctionsNW2N.m

+function sfs_n = gtDefShapeFunctionsNW2N(sfs_nw)
+% FUNCTION sfs_n = gtDefShapeFunctionsNW2N(sfs_nw)
+%
+
+    sfs_n = cell(size(sfs_nw));
+
+    tot_orientations = numel(sfs_nw);
+    for ii_o = 1:tot_orientations
+        num_blobs = numel(sfs_nw{ii_o});
+
+        sfs_n{ii_o} = gtFwdSimBlobDefinition('sf_n', num_blobs);
+
+        for ii_b = 1:num_blobs
+            sfs_n{ii_o}(ii_b).intm = sum(sfs_nw{ii_o}(ii_b).intm, 2);
+            sfs_n{ii_o}(ii_b).bbsize = sfs_nw{ii_o}(ii_b).bbsize(1);
+        end
+        [sfs_n{ii_o}.bbwim] = deal(sfs_nw{ii_o}.bbnim);
+    end
+end

zUtil_ForwardSim/gtFwdSimBlobDefinition.m

@@ -12,6 +12,11 @@ function blob = gtFwdSimBlobDefinition(type, num_blobs)
                 'intm',      [], ...          % The normalized shape function
                 'bbwim',     zeros(0, 2), ... % Shape function's limits in W
                 'bbsize',    zeros(0, 1) );   % Shape function's BoundingBox (includes margins)
+        case 'sf_n'
+            blob = struct( ...
+                'intm',      [], ...          % The normalized shape function
+                'bbnim',     zeros(0, 2), ... % Shape function's limits in N
+                'bbsize',    zeros(0, 1) );   % Shape function's BoundingBox (includes margins)
         case 'sf_nw'
             blob = struct( ...
                 'intm',      [], ...          % The normalized shape function