1 | print 'Loading DYNAMICO modules ...' |
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2 | from dynamico.meshes import morton_index, key_to_perm, reorder_indices, reorder_values |
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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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9 | grid = 10242 # 2562, 10242, 40962 |
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10 | |
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11 | #-------------- read MPAS mesh ----------------# |
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12 | |
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13 | print 'Reading MPAS mesh ...' |
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14 | mesh=cdf.Dataset('grids_MPAS/x1.%d.grid.nc'%grid, "r") |
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15 | |
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16 | def getdims(*names): return [len(mesh.dimensions[name]) for name in names] |
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17 | def getvars(*names): |
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18 | for name in names : |
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19 | print "getvar %s ..."%name |
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20 | time1=time.time() |
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21 | ret=[mesh.variables[name][:] for name in names] |
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22 | print "... Done in %f seconds"%(time.time()-time1) |
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23 | return ret |
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24 | |
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25 | primal_num, edge_num, dual_num = getdims('nCells','nEdges','nVertices') |
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26 | print 'Number of primal cells, dual cells and edges : %d, %d, %d '%(primal_num,dual_num,edge_num) |
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27 | # get degree of primal, dual cells |
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28 | primal_deg, trisk_deg = getvars('nEdgesOnCell','nEdgesOnEdge') |
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29 | # get indices for stencils |
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30 | primal_edge, left_right = getvars('edgesOnCell','cellsOnEdge') |
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31 | dual_edge, down_up = getvars('edgesOnVertex','verticesOnEdge') |
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32 | primal_vertex, dual_vertex, trisk = getvars('verticesOnCell','cellsOnVertex','edgesOnEdge') |
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33 | # get positions, lengths, surfaces and weights |
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34 | le,de,Ai,Av = getvars('dvEdge','dcEdge','areaCell','areaTriangle') |
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35 | lat_i,lon_i = getvars('latCell','lonCell') |
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36 | lat_v,lon_v = getvars('latVertex','lonVertex') |
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37 | lat_e,lon_e,angle_e = getvars('latEdge','lonEdge','angleEdge') |
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38 | wee,Riv2 = getvars('weightsOnEdge','kiteAreasOnVertex') |
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39 | mesh.close() |
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40 | |
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41 | #------------ reorder mesh according to Morton index --------------# |
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42 | |
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43 | def morton_order(lon,lat): |
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44 | x,y,z = np.cos(lat)*np.cos(lon), np.cos(lat)*np.sin(lon), np.sin(lat) |
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45 | keys = morton_index(x,y,z) |
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46 | return key_to_perm(keys) |
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47 | |
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48 | perm_i = morton_order(lon_i,lat_i) |
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49 | perm_v = morton_order(lon_v,lat_v) |
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50 | perm_e = morton_order(lon_e,lat_e) |
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51 | |
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52 | # MPAS => Python |
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53 | for idx in primal_edge, left_right, dual_edge, down_up, primal_vertex, dual_vertex, trisk : idx[:]=idx[:]-1 |
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54 | |
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55 | reorder_indices(perm_i, primal_deg, primal_vertex, primal_edge, lon_i, lat_i, Ai) |
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56 | reorder_indices(perm_v, dual_vertex, dual_edge, lon_v, lat_v, Av, Riv2) |
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57 | reorder_indices(perm_e, trisk_deg, left_right, down_up, trisk, lon_e, lat_e, angle_e, le, de, wee) |
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58 | reorder_values(perm_i, dual_vertex, left_right) |
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59 | reorder_values(perm_v, primal_vertex, down_up) |
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60 | reorder_values(perm_e, primal_edge, dual_edge, trisk) |
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61 | |
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62 | # Python => MPAS |
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63 | for idx in primal_edge, left_right, dual_edge, down_up, primal_vertex, dual_vertex, trisk : idx[:]=idx[:]+1 |
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64 | |
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65 | #--- Open copy of MPAS mesh file ; keep file structure but replace contents of variables ---# |
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66 | |
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67 | mesh=cdf.Dataset('grids/x1.%d.grid.nc'%grid, "r+") |
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68 | |
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69 | def putvars(datas,names): |
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70 | for name,data in zip(names,datas) : |
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71 | print "putvar %s ..."%name |
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72 | time1=time.time() |
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73 | mesh.variables[name][:] = data[:] |
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74 | print "... Done in %f seconds"%(time.time()-time1) |
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75 | |
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76 | putvars( (primal_deg, trisk_deg), ('nEdgesOnCell','nEdgesOnEdge') ) |
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77 | putvars( (primal_edge, left_right), ('edgesOnCell','cellsOnEdge') ) |
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78 | putvars( (dual_edge, down_up), ('edgesOnVertex','verticesOnEdge') ) |
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79 | putvars( (primal_vertex, dual_vertex, trisk), ('verticesOnCell','cellsOnVertex','edgesOnEdge') ) |
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80 | putvars( (le,de,Ai,Av), ('dvEdge','dcEdge','areaCell','areaTriangle') ) |
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81 | putvars( (lat_i,lon_i), ('latCell','lonCell') ) |
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82 | putvars( (lat_v,lon_v), ('latVertex','lonVertex') ) |
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83 | putvars( (lat_e,lon_e,angle_e), ('latEdge','lonEdge','angleEdge') ) |
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84 | putvars( (wee,Riv2), ('weightsOnEdge','kiteAreasOnVertex') ) |
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85 | |
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86 | mesh.close() |
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