mirror of
https://gitlab.com/gaelysam/mapgen_rivers.git
synced 2024-11-11 05:10:23 +01:00
149 lines
4.1 KiB
Python
Executable File
149 lines
4.1 KiB
Python
Executable File
#!/usr/bin/env python3
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import numpy as np
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import noise
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import os
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import sys
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import terrainlib
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### PARSE COMMAND-LINE ARGUMENTS
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argc = len(sys.argv)
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config_file = 'terrain.conf'
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output_dir = 'river_data'
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params_from_args = {}
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i = 1 # Index of arguments
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j = 1 # Number of 'orphan' arguments (the ones that are not preceded by '--something')
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while i < argc:
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arg = sys.argv[i]
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if arg[:2] == '--':
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pname = arg[2:]
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v = None
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split = pname.split('=', maxsplit=1)
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if len(split) == 2:
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pname, v = split
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i += 1
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elif i+1 < argc:
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v = sys.argv[i+1]
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i += 2
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if v is not None:
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if pname == 'config':
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config_file = v
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elif pname == 'output':
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output_dir = v
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else:
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params_from_args[pname] = v
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else:
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if j == 1:
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config_file = arg
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elif j == 2:
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output_dir = arg
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i += 1
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j += 1
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print(config_file, output_dir)
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params = terrainlib.read_config_file(config_file)
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params.update(params_from_args) # Params given from args prevail against conf file
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### READ SETTINGS
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def get_setting(name, default):
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if name in params:
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return params[name]
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return default
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mapsize = int(get_setting('mapsize', 1000))
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scale = float(get_setting('scale', 400.0))
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vscale = float(get_setting('vscale', 300.0))
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offset = float(get_setting('offset', 0.0))
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persistence = float(get_setting('persistence', 0.6))
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lacunarity = float(get_setting('lacunarity', 2.0))
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K = float(get_setting('K', 1.0))
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m = float(get_setting('m', 0.35))
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d = float(get_setting('d', 0.2))
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sea_level = float(get_setting('sea_level', 0.0))
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flex_radius = float(get_setting('flex_radius', 20.0))
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time = float(get_setting('time', 10.0))
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niter = int(get_setting('niter', 10))
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### MAKE INITIAL TOPOGRAPHY
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n = np.zeros((mapsize+1, mapsize+1))
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# Set noise parameters
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params = {
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"octaves" : int(np.ceil(np.log2(mapsize)))+1,
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"persistence" : persistence,
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"lacunarity" : lacunarity,
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}
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# Determine noise offset randomly
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xbase = np.random.randint(65536)
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ybase = np.random.randint(65536)
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# Generate the noise
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for x in range(mapsize+1):
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for y in range(mapsize+1):
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n[x,y] = noise.snoise2(x/scale + xbase, y/scale + ybase, **params)
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nn = n*vscale + offset
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### COMPUTE LANDSCAPE EVOLUTION
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# Initialize landscape evolution model
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print('Initializing model')
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model = terrainlib.EvolutionModel(nn, K=1, m=0.35, d=1, sea_level=0, flex_radius=flex_radius)
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terrainlib.update(model.dem, model.lakes, t=5, title='Initializing...')
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dt = time/niter
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# Run the model's processes: the order in which the processes are run is arbitrary and could be changed.
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print('Initial flow calculation')
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model.calculate_flow()
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for i in range(niter):
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disp_niter = 'Iteration {:d} of {:d}...'.format(i+1, niter)
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terrainlib.update(model.dem, model.lakes, title=disp_niter)
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print(disp_niter)
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print('Diffusion')
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model.diffusion(dt)
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print('Advection')
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model.advection(dt)
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print('Isostatic equilibration')
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model.adjust_isostasy()
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print('Flow calculation')
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model.calculate_flow()
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print('Done!')
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# Twist the grid
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bx, by = terrainlib.make_bounds(model.dirs, model.rivers)
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offset_x, offset_y = terrainlib.twist(bx, by, terrainlib.get_fixed(model.dirs))
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# Convert offset in 8-bits
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offset_x = np.clip(np.floor(offset_x * 256), -128, 127)
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offset_y = np.clip(np.floor(offset_y * 256), -128, 127)
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### SAVE OUTPUT
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if not os.path.isdir(output_dir):
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os.mkdir(output_dir)
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os.chdir(output_dir)
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# Save the files
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terrainlib.save(model.dem, 'dem', dtype='>i2')
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terrainlib.save(model.lakes, 'lakes', dtype='>i2')
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terrainlib.save(offset_x, 'offset_x', dtype='i1')
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terrainlib.save(offset_y, 'offset_y', dtype='i1')
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terrainlib.save(model.dirs, 'dirs', dtype='u1')
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terrainlib.save(model.rivers, 'rivers', dtype='>u4')
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with open('size', 'w') as sfile:
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sfile.write('{:d}\n{:d}'.format(mapsize+1, mapsize+1))
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terrainlib.stats(model.dem, model.lakes)
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print()
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print('Grid is ready for use!')
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terrainlib.plot(model.dem, model.lakes, title='Final grid, ready for use!')
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