drawmesh.m

解决麦克斯韦的matlab源文件

function drawmesh(mesh,titstr)
% Graphical output of 2D unstructured grid
%
% mesh -> 2D triangulation in special mesh format
%

if (nargin < 2), titstr = 'Mesh'; end;

ebd_idx  = find(mesh.ebfl(:,1) ~= 0);
eint_idx = find(mesh.ebfl(:,1) == 0);

s = sprintf(' : %d vts, %d edges, %d cells',mesh.Nv,mesh.Ne,mesh.Nt);

figure; clf;
hold on;
title([titstr s]);
for i=eint_idx'
  ev = [mesh.vt(mesh.ep(i,1),:)' mesh.vt(mesh.ep(i,2),:)']; 
  plot(ev(1,:),ev(2,:),'b-');
end
for i=ebd_idx'
  ev = [mesh.vt(mesh.ep(i,1),:)' mesh.vt(mesh.ep(i,2),:)']; 
  plot(ev(1,:),ev(2,:),'r-');
end
hold off;

figure; clf;
hold on;
title(s);
quiver(mesh.vt(mesh.ep(eint_idx,1),1),mesh.vt(mesh.ep(eint_idx,1),2),...
       mesh.vt(mesh.ep(eint_idx,2),1)-mesh.vt(mesh.ep(eint_idx,1),1),...
       mesh.vt(mesh.ep(eint_idx,2),2)-mesh.vt(mesh.ep(eint_idx,1),2),0,'-b');
quiver(mesh.vt(mesh.ep(ebd_idx,1),1),mesh.vt(mesh.ep(ebd_idx,1),2),...
       mesh.vt(mesh.ep(ebd_idx,2),1)-mesh.vt(mesh.ep(ebd_idx,1),1),...
       mesh.vt(mesh.ep(ebd_idx,2),2)-mesh.vt(mesh.ep(ebd_idx,1),2),0,'-r');
hold off;