"""Create mesh and time boundary for the Okushiri island validation """ from anuga.pmesh.mesh import * from anuga.pmesh.mesh_interface import create_mesh_from_regions from anuga.coordinate_transforms.geo_reference import Geo_reference from anuga.geospatial_data import Geospatial_data from anuga.config import netcdf_float from Scientific.IO.NetCDF import NetCDFFile import project def prepare_bathymetry(filename): """Convert benchmark 2 bathymetry to NetCDF pts file. This is a 'throw-away' code taylor made for files like 'Benchmark_2_bathymetry.txt' from the LWRU2 benchmark """ print 'Creating', filename # Read the ascii (.txt) version of this file, # make it comma separated and invert the bathymetry # (Below mean sea level should be negative) infile = open(filename[:-4] + '.txt') points = [] attribute = [] for line in infile.readlines()[1:]: #Skip first line (the header) fields = line.strip().split() x = float(fields[0]) y = float(fields[1]) z = -float(fields[2]) # Bathymetry is inverted in original file points.append([x,y]) attribute.append(z) infile.close() # Convert to geospatial data and store as NetCDF G = Geospatial_data(data_points=points, attributes=attribute) G.export_points_file(filename) def prepare_timeboundary(filename): """Convert benchmark 2 time series to NetCDF tms file. This is a 'throw-away' code taylor made for files like 'Benchmark_2_input.txt' from the LWRU2 benchmark """ print 'Creating', filename # Read the ascii (.txt) version of this file fid = open(filename[:-4] + '.txt') # Skip first line line = fid.readline() # Read remaining lines lines = fid.readlines() fid.close() N = len(lines) T = num.zeros(N, num.float) #Time Q = num.zeros(N, num.float) #Values for i, line in enumerate(lines): fields = line.split() T[i] = float(fields[0]) Q[i] = float(fields[1]) # Create tms NetCDF file fid = NetCDFFile(filename, 'w') fid.institution = 'Geoscience Australia' fid.description = 'Input wave for Benchmark 2' fid.starttime = 0.0 fid.createDimension('number_of_timesteps', len(T)) fid.createVariable('time', netcdf_float, ('number_of_timesteps',)) fid.variables['time'][:] = T fid.createVariable('stage', netcdf_float, ('number_of_timesteps',)) fid.variables['stage'][:] = Q[:] fid.createVariable('xmomentum', netcdf_float, ('number_of_timesteps',)) fid.variables['xmomentum'][:] = 0.0 fid.createVariable('ymomentum', netcdf_float, ('number_of_timesteps',)) fid.variables['ymomentum'][:] = 0.0 fid.close() #------------------------------------------------------------- if __name__ == "__main__": # Prepare bathymetry prepare_bathymetry(project.bathymetry_filename) # Prepare time boundary prepare_timeboundary(project.boundary_filename) #-------------------------------------------------------------------------- # Create the triangular mesh based on overall clipping polygon with a # tagged # boundary and interior regions defined in project.py along with # resolutions (maximal area of per triangle) for each polygon #-------------------------------------------------------------------------- base_resolution = 1 # Use this to coarsen or refine entire mesh. # Basic geometry and bounding polygon xleft = 0 xright = 5.448 ybottom = 0 ytop = 3.402 point_sw = [xleft, ybottom] point_se = [xright, ybottom] point_nw = [xleft, ytop] point_ne = [xright, ytop] bounding_polygon = [point_se, point_ne, point_nw, point_sw] # Localised refined area for gulleys xl = 4.8 xr = 5.3 yb = 1.6 yt = 2.3 p0 = [xl, yb] p1 = [xr, yb] p2 = [xr, yt] p3 = [xl, yt] gulleys = [p0, p1, p2, p3] # Island area and drawdown region (original) #island_0 = [xleft + 2*(xright-xleft)/3+1.2, ytop-0.5] #island_1 = [xleft + 2*(xright-xleft)/3+0.5, ybottom + 2*(ytop-ybottom)/3] #island_2 = [xleft + (xright-xleft)/2+0.3, ybottom + 2*(ytop-ybottom)/3-0.3] #island_3 = [xleft + (xright-xleft)/2+0.3, ybottom + (ytop-ybottom)/3+0.3] #island_4 = [xleft + 2*(xright-xleft)/3+0.4, ybottom + (ytop-ybottom)/3-0.3] #island_5 = [xleft + 2*(xright-xleft)/3+1.2, ybottom+0.2] #island_6 = [xl-.01, yb] #OK #island_7 = [xl-.01, yt] #OK # Island area and drawdown region island_0 = [xleft + 2*(xright-xleft)/3+1.2, ytop-0.5] island_1 = [xleft + 2*(xright-xleft)/3+0.5, ybottom + 2*(ytop-ybottom)/3] island_2 = [xleft + (xright-xleft)/2+0.4, ybottom + 2*(ytop-ybottom)/3-0.3] island_3 = [xleft + (xright-xleft)/2+0.4, ybottom + (ytop-ybottom)/3+0.3] island_4 = [xleft + 2*(xright-xleft)/3+0.4, ybottom + (ytop-ybottom)/3-0.3] island_5 = [xleft + 2*(xright-xleft)/3+1.2, ybottom+0.8] island_6 = [xl-.01, yb] # Keep right edge just off the gulleys island_7 = [xl-.01, yt] island = [island_0, island_1, island_2, island_3, island_4, island_5, island_6, island_7] # Region spanning half right hand side of domain just inside boundary (org) #rhs_nw = [xleft + (xright-xleft)/3+1, ytop-0.02] #rhs_sw = [xleft + (xright-xleft)/3+1, ybottom+0.02] #rhs_se = [xright-0.02, ybottom+0.02] #rhs_ne = [xright-0.02, ytop-0.02] # Region spanning half right hand side of domain just inside boundary rhs_nw = [xleft + (xright-xleft)/3+1, ytop-1.4] rhs_sw = [xleft + (xright-xleft)/3+1, ybottom+0.5] rhs_se = [xright-0.1, ybottom+0.2] rhs_ne = [xright-0.1, ytop-0.2] rhs_region = [rhs_nw, rhs_ne, rhs_se, rhs_sw] # Interior regions and creation of mesh interior_regions = [[rhs_region, 0.0005], [island, 0.0002*base_resolution], [gulleys, 0.00002*base_resolution]] meshname = project.mesh_filename + '.msh' m = create_mesh_from_regions(bounding_polygon, boundary_tags={'wall': [0, 1, 3], 'wave': [2]}, maximum_triangle_area=0.1*base_resolution, interior_regions=interior_regions, filename=project.mesh_filename, verbose=True)