Added area() method to Grid classes.

impls/hexagonal-cell/1-levels/simple/Grid.hpp

@@ -118,6 +118,10 @@ namespace CA {
     Real distance() const;
 
 
+    //! Returns the area of a cell.
+    Real area() const;
+
+
     //! Return the x coordinate of the bottom-left corner.
     Real xCoo() const;
 
@@ -356,6 +360,11 @@ namespace CA {
     return _cagrid.distance;
   }
 
+  inline Real Grid::area() const
+  {
+    return _cagrid.area;
+  }
+
   inline Real Grid::xCoo() const
   {
     return _cagrid.x_coo;

impls/hexagonal-cell/1-levels/simple/caapi2D.hpp

@@ -141,8 +141,7 @@ struct _caGrid
 
 
   //! The distance between the centroid of the main cell (number 0)
-  //! and the centroid of the given cell in the vertical and
-  //! horizontal plane.
+  //! and the centroid of an adjacent cell.
   _caReal distance;
 
   //! The x coordinate of the bottom-left corner

impls/square-cell/vn-neighbours/1-levels/opencl/Grid.hpp

@@ -141,6 +141,10 @@ namespace CA {
     Real length() const;
 
 
+    //! Returns the area of a cell.
+    Real area() const;
+
+
     //! Return the x coordinate of the bottom-left corner.
     Real xCoo() const;
 
@@ -749,6 +753,11 @@ namespace CA {
     return _cagrid.length;
   }
 
+  inline Real Grid::area() const
+  {
+    return _cagrid.area;
+  }
+
 
   inline Real Grid::xCoo() const
   {

impls/square-cell/vn-neighbours/1-levels/simple/Grid.hpp

@@ -107,6 +107,10 @@ namespace CA {
     Real length() const;
 
 
+    //! Returns the area of a cell.
+    Real area() const;
+
+
     //! Return the x coordinate of the bottom-left corner.
     Real xCoo() const;
 
@@ -364,6 +368,11 @@ namespace CA {
     return _cagrid.length;
   }
 
+  inline Real Grid::area() const
+  {
+    return _cagrid.area;
+  }
+
 
   inline Real Grid::xCoo() const
   {