def crosssection(x, NP, k, N, pN):
points2 = pu.uniformsquarepoints(NP)
points3 = np.hstack((np.ones((NP*NP,1)) * x, points2))
meshevents = lambda m: pps.stokescubemesh(N, m)
u, p = pps.stokespressure(k,meshevents,{pps.inputbdytag:pps.pfn(0), pps.outputbdytag:pps.pfn(1.0)}, points3, False, N==1)
ur, _ = pep.poisson(pN, points2)
pp = points2.reshape(NP,NP,2).transpose(2,0,1)
mpl.figure(facecolor='white')
c = mpl.contour(pp[0], pp[1], u[:,0].reshape(NP,NP), fontsize=14)
mpl.clabel(c, inline=1, fontsize = 14)
mpl.figure(facecolor='white')
c = mpl.contourf(pp[0], pp[1], ur.reshape(NP,NP) - u[:,0].reshape(NP,NP), fontsize=14, colors = None, cmap=mpl.get_cmap('Greys'))
mpl.colorbar(c, shrink=0.8)
# mpl.clabel(c, inline=1, fontsize = 14)
mpl.figure(facecolor='white')
c = mpl.contourf(pp[0], pp[1], p.reshape(NP,NP), fontsize=14, colors = None, cmap=mpl.get_cmap('Greys'))
mpl.colorbar(c, shrink=0.8)
e[n] = math.sqrt(sum((Nv - nv)**2 * w)) / Nvl2
print e
p = mp.semilogy(np.arange(N)*2, e)
mp.xlabel("polynomial degree", fontsize=14)
mp.ylabel("relative error", fontsize=14)
if __name__ == '__main__':
mp.rcParams['font.size'] = 14
mp.figure(facecolor='white')
convergence(30)
#
N = 20
NP = 50
# points = np.vstack((np.arange(0,1,0.1),)*2).transpose() + np.array([[0.0001,0.2]])
points = pu.uniformsquarepoints(NP)
print points
u, ddu = poisson(N, points)
mp.figure(facecolor='white')
c = mp.contour(points[:,0].reshape(NP,NP), points[:,1].reshape(NP,NP), u.reshape(NP,NP), fontsize=14)
mp.clabel(c, inline=1, fontsize = 14)
pylab.show()
# emm.figure(bgcolor=(1,1,1), fgcolor=(0,0,0))
# s = emm.surf(points[:,0].reshape(NP,NP), points[:,1].reshape(NP,NP), u.reshape(NP,NP), warp_scale='auto')
# emm.axes(s)
# emm.colorbar()
## emm.outline()
# emm.figure()
# emm.surf(points[:,0].reshape(NP,NP), points[:,1].reshape(NP,NP), ddu.reshape(NP,NP), warp_scale='auto')
#