[674] | 1 | print 'Loading DYNAMICO modules ...' |
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[779] | 2 | from dynamico.meshes import morton_index, key_to_perm, reorder_indices, reorder_values, MPAS_Format, Unstructured_Mesh |
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[674] | 3 | print '...Done' |
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| 4 | import numpy as np |
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| 5 | import netCDF4 as cdf |
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| 6 | import matplotlib.pyplot as plt |
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| 7 | import time |
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| 8 | |
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[779] | 9 | #------------ Read command-line arguments ----------# |
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[674] | 10 | |
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[779] | 11 | import argparse |
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| 12 | parser = argparse.ArgumentParser() |
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| 13 | parser.add_argument("-n", type=int, default=2562, |
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| 14 | help="number of primal cells in MPAS mesh") |
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| 15 | args = parser.parse_args() |
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| 16 | grid = args.n |
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| 17 | |
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[674] | 18 | #-------------- read MPAS mesh ----------------# |
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| 19 | |
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[779] | 20 | meshfile='grids_MPAS/x1.%d.grid.nc'%grid |
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| 21 | print 'Reading MPAS mesh %s ...'%meshfile |
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[674] | 22 | |
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[779] | 23 | def f(lon,lat): return 0.*lon |
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| 24 | mesh=MPAS_Format(meshfile) |
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| 25 | mesh=Unstructured_Mesh(mesh, 1, 1, 1., f) |
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| 26 | primal_ne, dual_ne = mesh.primal_ne, mesh.dual_ne |
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| 27 | |
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| 28 | mesh=cdf.Dataset(meshfile, "r") |
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| 29 | |
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[674] | 30 | def getdims(*names): return [len(mesh.dimensions[name]) for name in names] |
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| 31 | def getvars(*names): |
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| 32 | for name in names : |
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| 33 | print "getvar %s ..."%name |
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| 34 | time1=time.time() |
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| 35 | ret=[mesh.variables[name][:] for name in names] |
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| 36 | print "... Done in %f seconds"%(time.time()-time1) |
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| 37 | return ret |
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| 38 | |
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| 39 | primal_num, edge_num, dual_num = getdims('nCells','nEdges','nVertices') |
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| 40 | print 'Number of primal cells, dual cells and edges : %d, %d, %d '%(primal_num,dual_num,edge_num) |
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| 41 | # get degree of primal, dual cells |
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| 42 | primal_deg, trisk_deg = getvars('nEdgesOnCell','nEdgesOnEdge') |
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| 43 | # get indices for stencils |
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| 44 | primal_edge, left_right = getvars('edgesOnCell','cellsOnEdge') |
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| 45 | dual_edge, down_up = getvars('edgesOnVertex','verticesOnEdge') |
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| 46 | primal_vertex, dual_vertex, trisk = getvars('verticesOnCell','cellsOnVertex','edgesOnEdge') |
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| 47 | # get positions, lengths, surfaces and weights |
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| 48 | le,de,Ai,Av = getvars('dvEdge','dcEdge','areaCell','areaTriangle') |
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| 49 | lat_i,lon_i = getvars('latCell','lonCell') |
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| 50 | lat_v,lon_v = getvars('latVertex','lonVertex') |
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| 51 | lat_e,lon_e,angle_e = getvars('latEdge','lonEdge','angleEdge') |
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| 52 | wee,Riv2 = getvars('weightsOnEdge','kiteAreasOnVertex') |
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| 53 | mesh.close() |
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| 54 | |
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| 55 | #------------ reorder mesh according to Morton index --------------# |
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| 56 | |
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| 57 | def morton_order(lon,lat): |
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| 58 | x,y,z = np.cos(lat)*np.cos(lon), np.cos(lat)*np.sin(lon), np.sin(lat) |
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| 59 | keys = morton_index(x,y,z) |
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| 60 | return key_to_perm(keys) |
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| 61 | |
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| 62 | perm_i = morton_order(lon_i,lat_i) |
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| 63 | perm_v = morton_order(lon_v,lat_v) |
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| 64 | perm_e = morton_order(lon_e,lat_e) |
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| 65 | |
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| 66 | # MPAS => Python |
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| 67 | for idx in primal_edge, left_right, dual_edge, down_up, primal_vertex, dual_vertex, trisk : idx[:]=idx[:]-1 |
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| 68 | |
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[779] | 69 | reorder_indices(perm_i, primal_deg, primal_vertex, primal_edge, primal_ne, lon_i, lat_i, Ai) |
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| 70 | reorder_indices(perm_v, dual_vertex, dual_edge, dual_ne, lon_v, lat_v, Av, Riv2) |
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[674] | 71 | reorder_indices(perm_e, trisk_deg, left_right, down_up, trisk, lon_e, lat_e, angle_e, le, de, wee) |
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| 72 | reorder_values(perm_i, dual_vertex, left_right) |
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| 73 | reorder_values(perm_v, primal_vertex, down_up) |
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| 74 | reorder_values(perm_e, primal_edge, dual_edge, trisk) |
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| 75 | |
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| 76 | # Python => MPAS |
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| 77 | for idx in primal_edge, left_right, dual_edge, down_up, primal_vertex, dual_vertex, trisk : idx[:]=idx[:]+1 |
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| 78 | |
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| 79 | #--- Open copy of MPAS mesh file ; keep file structure but replace contents of variables ---# |
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| 80 | |
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| 81 | mesh=cdf.Dataset('grids/x1.%d.grid.nc'%grid, "r+") |
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| 82 | |
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[779] | 83 | # create new variables dual_ne, primal_ne |
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| 84 | mesh.createVariable('signOnCell','i4',('nCells','maxEdges')) |
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| 85 | mesh.createVariable('signOnVertex','i4',('nVertices','vertexDegree')) |
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| 86 | |
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[674] | 87 | def putvars(datas,names): |
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| 88 | for name,data in zip(names,datas) : |
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| 89 | print "putvar %s ..."%name |
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| 90 | time1=time.time() |
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| 91 | mesh.variables[name][:] = data[:] |
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| 92 | print "... Done in %f seconds"%(time.time()-time1) |
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| 93 | |
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| 94 | putvars( (primal_deg, trisk_deg), ('nEdgesOnCell','nEdgesOnEdge') ) |
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| 95 | putvars( (primal_edge, left_right), ('edgesOnCell','cellsOnEdge') ) |
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| 96 | putvars( (dual_edge, down_up), ('edgesOnVertex','verticesOnEdge') ) |
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| 97 | putvars( (primal_vertex, dual_vertex, trisk), ('verticesOnCell','cellsOnVertex','edgesOnEdge') ) |
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| 98 | putvars( (le,de,Ai,Av), ('dvEdge','dcEdge','areaCell','areaTriangle') ) |
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| 99 | putvars( (lat_i,lon_i), ('latCell','lonCell') ) |
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| 100 | putvars( (lat_v,lon_v), ('latVertex','lonVertex') ) |
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| 101 | putvars( (lat_e,lon_e,angle_e), ('latEdge','lonEdge','angleEdge') ) |
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| 102 | putvars( (wee,Riv2), ('weightsOnEdge','kiteAreasOnVertex') ) |
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[779] | 103 | putvars( (primal_ne,dual_ne), ('signOnCell','signOnVertex') ) |
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[674] | 104 | |
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| 105 | mesh.close() |
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