mtcontrib/mapgen_rivers
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Added optional sea level variations for the simulation.

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This results in more varied coastline morphologies.
This commit is contained in:
Gael-de-Sailly
2020-12-22 01:11:43 +01:00
parent 9b4a9b2516
commit 2a9335332b
4 changed files with 28 additions and 8 deletions
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20
generate.py
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@ -65,6 +65,8 @@ K = float(get_setting('K', 1.0))
m = float(get_setting('m', 0.35))
d = float(get_setting('d', 0.2))
sea_level = float(get_setting('sea_level', 0.0))
sea_level_variations = float(get_setting('sea_level_variations', 0.0))
sea_level_variations_time = float(get_setting('sea_level_variations_time', 1.0))
flex_radius = float(get_setting('flex_radius', 20.0))
time = float(get_setting('time', 10.0))
@ -80,9 +82,19 @@ params = {
"lacunarity" : lacunarity,
}
params_sealevel = {
"octaves" : 1,
"persistence" : 1,
"lacunarity" : 2,
}
# Determine noise offset randomly
xbase = np.random.randint(8192)-4096
ybase = np.random.randint(8192)-4096
if sea_level_variations != 0.0:
sea_ybase = np.random.randint(8192)-4096
sea_level_ref = noise.snoise2(time * (1-1/niter) / sea_level_variations, sea_ybase, **params_sealevel) * sea_level_variations
offset -= (sea_level_ref + sea_level)
# Generate the noise
for x in range(mapsize+1):
@ -95,7 +107,7 @@ nn = n*vscale + offset
# Initialize landscape evolution model
print('Initializing model')
model = terrainlib.EvolutionModel(nn, K=K, m=m, d=d, sea_level=sea_level, flex_radius=flex_radius)
terrainlib.update(model.dem, model.lakes, t=5, title='Initializing...')
terrainlib.update(model.dem, model.lakes, t=5, sea_level=model.sea_level, title='Initializing...')
dt = time/niter
@ -103,13 +115,15 @@ dt = time/niter
for i in range(niter):
disp_niter = 'Iteration {:d} of {:d}...'.format(i+1, niter)
terrainlib.update(model.dem, model.lakes, title=disp_niter)
if sea_level_variations != 0:
model.sea_level = noise.snoise2((i*dt)/sea_level_variations_time, sea_ybase, **params_sealevel) * sea_level_variations - sea_level_ref
terrainlib.update(model.dem, model.lakes, sea_level=model.sea_level, title=disp_niter)
print(disp_niter)
print('Diffusion')
model.diffusion(dt)
print('Flow calculation')
model.calculate_flow()
terrainlib.update(model.dem, model.lakes, title=disp_niter)
terrainlib.update(model.dem, model.lakes, sea_level=model.sea_level, title=disp_niter)
print('Advection')
model.advection(dt)
print('Isostatic equilibration')