1 | """Create mesh and time boundary for the Okushiri island validation |
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2 | """ |
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3 | |
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4 | |
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5 | from Numeric import array, zeros, Float, allclose |
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6 | |
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7 | from anuga.pmesh.mesh import * |
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8 | from anuga.pmesh.mesh_interface import create_mesh_from_regions |
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9 | from anuga.coordinate_transforms.geo_reference import Geo_reference |
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10 | |
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11 | import project |
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12 | |
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13 | |
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14 | def prepare_timeboundary(filename): |
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15 | """Converting benchmark 2 time series to NetCDF tms file. |
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16 | This is a 'throw-away' code taylor made for files like |
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17 | 'Benchmark_2_input.txt' from the LWRU2 benchmark |
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18 | """ |
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19 | |
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20 | print 'Preparing time boundary from %s' %filename |
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21 | from Numeric import array |
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22 | |
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23 | fid = open(filename) |
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24 | |
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25 | #Skip first line |
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26 | line = fid.readline() |
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27 | |
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28 | #Read remaining lines |
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29 | lines = fid.readlines() |
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30 | fid.close() |
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31 | |
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32 | |
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33 | N = len(lines) |
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34 | T = zeros(N, Float) #Time |
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35 | Q = zeros(N, Float) #Values |
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36 | |
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37 | for i, line in enumerate(lines): |
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38 | fields = line.split() |
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39 | |
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40 | T[i] = float(fields[0]) |
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41 | Q[i] = float(fields[1]) |
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42 | |
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43 | |
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44 | #Create tms file |
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45 | from Scientific.IO.NetCDF import NetCDFFile |
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46 | |
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47 | outfile = filename[:-4] + '.tms' |
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48 | print 'Writing to', outfile |
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49 | fid = NetCDFFile(outfile, 'w') |
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50 | |
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51 | fid.institution = 'Geoscience Australia' |
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52 | fid.description = 'Input wave for Benchmark 2' |
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53 | fid.starttime = 0.0 |
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54 | fid.createDimension('number_of_timesteps', len(T)) |
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55 | fid.createVariable('time', Float, ('number_of_timesteps',)) |
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56 | fid.variables['time'][:] = T |
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57 | |
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58 | fid.createVariable('stage', Float, ('number_of_timesteps',)) |
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59 | fid.variables['stage'][:] = Q[:] |
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60 | |
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61 | fid.createVariable('xmomentum', Float, ('number_of_timesteps',)) |
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62 | fid.variables['xmomentum'][:] = 0.0 |
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63 | |
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64 | fid.createVariable('ymomentum', Float, ('number_of_timesteps',)) |
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65 | fid.variables['ymomentum'][:] = 0.0 |
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66 | |
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67 | fid.close() |
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68 | |
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69 | |
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70 | #------------------------------------------------------------- |
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71 | if __name__ == "__main__": |
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72 | |
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73 | # Prepare time boundary |
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74 | prepare_timeboundary(project.boundary_filename) |
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75 | |
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76 | |
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77 | #-------------------------------------------------------------------------- |
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78 | # Create the triangular mesh based on overall clipping polygon with a |
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79 | # tagged |
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80 | # boundary and interior regions defined in project.py along with |
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81 | # resolutions (maximal area of per triangle) for each polygon |
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82 | #-------------------------------------------------------------------------- |
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83 | |
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84 | base_resolution = 10 |
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85 | |
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86 | # Basic geometry |
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87 | xleft = 0 |
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88 | xright = 5.448 |
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89 | ybottom = 0 |
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90 | ytop = 3.402 |
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91 | |
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92 | # Outline |
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93 | point_sw = [xleft, ybottom] |
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94 | point_se = [xright, ybottom] |
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95 | point_nw = [xleft, ytop] |
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96 | point_ne = [xright, ytop] |
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97 | |
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98 | # Midway points (left) |
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99 | point_mtop = [xleft + (xright-xleft)/3+1, ytop] |
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100 | point_mbottom = [xleft + (xright-xleft)/3+1, ybottom] |
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101 | |
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102 | #Localised refined area for gulleys |
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103 | xl = 4.8 |
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104 | xr = 5.3 |
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105 | yb = 1.6 |
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106 | yt = 2.3 |
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107 | p0 = [xl, yb] |
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108 | p1 = [xr, yb] |
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109 | p2 = [xr, yt] |
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110 | p3 = [xl, yt] |
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111 | gulleys = [p0, p1, p2, p3] |
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112 | |
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113 | #Island area |
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114 | island_0 = [xleft + 2*(xright-xleft)/3+1.2, ytop-0.5] |
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115 | island_1 = [xleft + 2*(xright-xleft)/3+0.5, ybottom + 2*(ytop-ybottom)/3] |
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116 | island_2 = [xleft + (xright-xleft)/2+0.3, ybottom + 2*(ytop-ybottom)/3-0.3] |
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117 | island_3 = [xleft + (xright-xleft)/2+0.3, ybottom + (ytop-ybottom)/3+0.3] |
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118 | island_4 = [xleft + 2*(xright-xleft)/3+0.4, ybottom + (ytop-ybottom)/3-0.3] |
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119 | island_5 = [xleft + 2*(xright-xleft)/3+1.2, ybottom+0.2] |
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120 | island_6 = [xl-.01, yb] #OK |
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121 | island_7 = [xl-.01, yt] #OK |
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122 | |
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123 | island = [island_0, island_1, island_2, |
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124 | island_3, island_4, island_5, |
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125 | island_6, island_7] |
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126 | |
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127 | |
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128 | |
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129 | |
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130 | bounding_polygon = [point_se, |
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131 | point_ne, |
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132 | point_mtop, |
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133 | point_nw, |
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134 | point_sw, |
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135 | point_mbottom] |
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136 | |
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137 | |
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138 | interior_regions = [[gulleys, 0.00002*base_resolution], |
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139 | [island, 0.00007*base_resolution]] |
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140 | |
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141 | |
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142 | |
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143 | |
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144 | |
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145 | print 'start create mesh from regions' |
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146 | |
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147 | meshname = project.mesh_filename + '.msh' |
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148 | m = create_mesh_from_regions(bounding_polygon, |
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149 | boundary_tags={'wall': [0, 1, 2, 4, 5], |
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150 | 'wave': [3]}, |
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151 | maximum_triangle_area=0.1*base_resolution, |
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152 | interior_regions=interior_regions, |
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153 | filename=project.mesh_filename, |
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154 | use_cache=True, |
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155 | verbose=True) |
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156 | |
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