Optimization for the conservative interpolation code in 2d

femtools/Conservative_interpolation.F90

@@ -151,6 +151,10 @@ subroutine galerkin_projection_inner_loop(ele_B, little_mass_matrix, detJ, local
         end if
       else
         intersection = intersect_elements(old_position, ele_A, pos_B, supermesh_shape)
+        if (.not. has_references(intersection)) then
+           llnode => llnode%next
+           cycle
+        end if
       end if
 
 #ifdef DUMP_SUPERMESH_INTERSECTIONS
@@ -1055,6 +1059,11 @@ subroutine grandy_projection_scalars(old_fields, old_position, new_fields, new_p
         end do
 
         intersection = intersect_elements(old_position, ele_A, pos_B, supermesh_shape)
+        if (.not. has_references(intersection)) then
+           llnode => llnode%next
+           cycle
+        end if
+
         do ele_C=1,ele_count(intersection)
           vol_C = simplex_volume(intersection, ele_C)
           do field=1,field_cnt

femtools/Intersection_finder.F90

@@ -701,6 +701,11 @@ subroutine verify_map(mesh_field_a, mesh_field_b, map_ab, map_ab_reference)
       node => map_ab(i)%firstnode
       do while(associated(node))
         intersection = intersect_elements(mesh_field_a, i, ele_val(mesh_field_b, node%value), shape)
+        if (.not. has_references(intersection)) then
+           node => node%next
+           cycle
+        end if
+
         do j = 1, ele_count(intersection)
           allocate(detwei(shape%ngi))
           call transform_to_physical(intersection, j, detwei = detwei)
@@ -715,6 +720,11 @@ subroutine verify_map(mesh_field_a, mesh_field_b, map_ab, map_ab_reference)
       node => map_ab_reference(i)%firstnode
       do while(associated(node))
         intersection = intersect_elements(mesh_field_a, i, ele_val(mesh_field_b, node%value), shape)
+        if (.not. has_references(intersection)) then
+           node => node%next
+           cycle
+        end if
+
         do j = 1, ele_count(intersection)
           allocate(detwei(shape%ngi))
           call transform_to_physical(intersection, j, detwei = detwei)

femtools/Supermesh.F90

@@ -205,6 +205,11 @@ function intersect_elements(positions_A, ele_A, posB, shape) result(intersection
     call cintersector_set_input(ele_val(positions_A, ele_A), posB, dim, loc)
     call cintersector_drive
     call cintersector_query(nonods, totele)
+
+    if (totele==0) then
+       return
+    end if
+
     call allocate(intersection_mesh, nonods, totele, shape, "IntersectionMesh")
     intersection_mesh%continuity = -1
     call allocate(intersection, dim, intersection_mesh, "IntersectionCoordinates")