function fiber_mesh_bc_stars (inc_e, inc_p) % Copyright 2007, J.E. Akin. All rights reserved. % ------------------------------------------------------ % bare minimum borders % Matlab program to calculate & plot 2-D FE meshes % ------------------------------------------------------ % c_x = x coordinates of nod_per_el line polygon % c_y = y coordinates of nod_per_el line polygon % inc_e = increment in element numbers on plot, if > 0 % inc_p = increment in node numbers on plot, if > 0 % msh_typ_nodes = connectivity list for elements, nt x nod_per_el % loop = corners for nod_per_el line polygon % lab_p = 1, if node points are circled lab_p = 0; % nod_per_el = Nodes per element % np = Number of Points % nt = Number of elements % pre_e = Element items before type & connectivity list % pre_p = Nodal items before coordinates % LIST1DN_001 = Nodal coordinates (with preceeding data) % t_x = x coordinates of nod_per_el corners % t_y = y coordinates of nod_per_el corners % xy = Coordinates of points, np x 2 pre_e = 0 ; pre_p = 0; if ( nargin == 0 ) inc_e = 0 ; inc_p = 0 ; elseif ( nargin == 1 ) inc_p = 0 ; end %if % Read coordinate file and connectivity file % integer bc code, real xy pairs for np points (pre_p = 1) [xmin, xmax, ymin, ymax] = bare_mesh_overlay (inc_e, inc_p) ; % Set control data: number of points load LIST1DN_001.tmp ; np = size (LIST1DN_001,1) ; % number of nodal points ns = size (LIST1DN_001,2) - pre_p ; % dimension of space if ( np == 0 ) error ('Error missing file LIST1DN_001.tmp') end % if error x (np) = 0. ; % pre-allocate array x y (np) = 0. ; % pre-allocate array y % LIST1DN_001 has: pre_p items then: x, y x = LIST1DN_001 (1:np, (pre_p+1)) ; % extract x %CL if ( ns >= 2) y = LIST1DN_001 (1:np, (pre_p+2)) ; % extract y %CL else y (1:np) = 0. ; end % if 1D % Set control data: number elements & nodes_per_element load LIST1DE_001.tmp ; % nod_per_el nodes per element nt = size (LIST1DE_001,1); % number of elements if ( nt == 0 ) error ('Error missing file LIST1DE_001.tmp') end % if error nod_per_el = size (LIST1DE_001,2) - pre_e ; % nodes per element fprintf ('Read %g segments with %g nodes each \n', nt,nod_per_el) Col_1 = 1 ; Col_2 = 2 ; n_type = 1 ; [M_min, J_min] = min ( LIST1DE_001 (1:nt, Col_1:Col_2) ); %CL t_nodes (nod_per_el) = 0 ; % Optional pre-allocation t_x (nod_per_el) = 0 ; % Optional pre-allocation t_y (nod_per_el) = 0 ; % Optional pre-allocation c_x (nod_per_el + 1) = 0 ; % Optional pre-allocation c_y (nod_per_el + 1) = 0 ; % Optional pre-allocation loop (nod_per_el + 1) = 0 ; % Optional pre-allocation % set constants [loop] = get_El_Loop (nod_per_el) ; % Initialize plots %b xmax = max (x) ; xmin = min (x) ; %b ymax = max (y) ; ymin = min (y) ; %b xdiff = xmax - xmin ; ydiff = ymax - ymin ; %b if ( ydiff == 0.0 ) %b ydiff = 0.1 * xdiff ; % allow for 1-D mesh (with y == 0) %b ymax = ymin + ydiff ; %b end % if no y coordinates %b % xmax = xmax + xdiff/10; ymax = ymax + ydiff/10; %b % xmin = xmin - xdiff/10; ymin = ymin - ydiff/10; %b clf % clear graphics %b axis ([xmin, xmax, ymin, ymax]) % set axes axis ('equal') % true shape style hold on % hold image for plots %b grid % add grid dots %b xlabel ('X') % add label %b ylabel ('Y') % add label title ([' Nanofiber Constraint Points ('... int2str(np),' Nodes)']) % Plot input mesh points & label them %b if (lab_p == 1) % plot all points plot (x, y, 'b*') % mark each node %b end % if show labels % Loop over all elements for it = 1:nt ; % Extract corner connectivity t_nodes = LIST1DE_001 ((it), Col_1:Col_2 ) ; %CL [N_min, I_min] = min ( t_nodes ) ; % Extract corner coordinates t_x = x (t_nodes) ; % x at those nodes, only t_y = y (t_nodes) ; % y at those nodes, only % Plot this polygon c_x = t_x (loop) ; % x for nod_per_el line polygon c_y = t_y (loop) ; % y for nod_per_el line polygon plot (c_x, c_y, 'k-') % plot nod_per_el lines end % for over all elements % -depsc -tiff % for an eps version hold off % end of fiber_mesh_bc_stars