mtcontrib/mapgen_rivers
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variable_erosion
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Author SHA1 Message Date
Gael-de-Sailly
462942cc22 Use iterative finite differences for diffusion, instead of gaussian blur 
Allows variable diffusion coefficients
 2020-12-27 13:46:25 +01:00
Gael-de-Sailly
1b96f52e47 Decrease variations of parameter m 2020-12-27 13:45:24 +01:00
Gael-de-Sailly
3ccb6932ad Implement simple tectonics. 
Uplift and subsidence are determined with a noise, at every iteration.
There is no distinctive pattern like tectonic plates, just vertical movements
disturbing rivers from their equilibrium state, and thus creating more diversity.
More lakes and waterfalls especially.
 2020-12-24 15:35:27 +01:00
Gael-de-Sailly
32f3cd9925 Fixed 3D noise map, and removed catchment_reference 
Now K and m are determined independently.
Alsoo removed debug plotting.
 2020-12-24 15:33:03 +01:00
Gael-de-Sailly
ae46ada648 Use a class for noise map generation, and add a function for 3D slice of a 2D noise. 2020-12-24 15:33:03 +01:00
Gael-de-Sailly
4b1d11dd73 Implement variable K and m erosion parameters 
For now noise parameters are hardcoded.
 2020-12-24 15:30:35 +01:00
Gael-de-Sailly
c175f2bbf7 Document conf files 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
ca68738ba7 Reworked parameters, and rename 'terrain.conf' to 'terrain_default.conf' 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
85e545d5ac Fixed sea level variations 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
e0aecdc3f3 Added a second method for local flow calculation. It is possible to switch between them using the 'flow_method' parameter. 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
83728cc932 Fixed lakes elevation 
There were sometimes missing water patches near a lake's edge, when the neighbour catchment area was lower.
This commit allows to divide a cell into several mini-catchment basins, to fill only a part of it with water.
 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
9ffa150263 Added function 'noisemap' to generate a noise map with a quite unified parameter set, and an option for logarithmic noise. For future use. 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
2a9335332b Added optional sea level variations for the simulation. 
This results in more varied coastline morphologies.
 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
9b4a9b2516 Rework default erosion parameters, 
Fix ignored values of K and m,
and changed processes order.
 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
7529291ab4 For bounds.py (calculation of offsets), use the same data type as rivers 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
b4f97bec61 For noise map seed: don't go over ±4096, to prevent rounding errors on coordinates (because noise library uses 32-bit floats) 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
3dc874a494 Added description of the algorithm + acknowledge the authors of the paper. 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
f0dddee33c Lakes map: keep initial height (reduces file size) 
Lake height is calculated for every basin, and there is a lake if lake height is higher than ground height. If it is lower, there is no lake.
In that case, it was previously raised to ground level, but since this can be done in Lua, we can write initial lakes height in the files.
This has the advantage of reducing file size, since there are bigger areas of equal values, that are more efficiently compressed.
 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
ecd2c7d3f9 Completely change flow routing algorithm, 
use a local flow calculation, determine depressions, and link them using a minimum spanning tree (Boruvka's algorithm).
This is based on a paper by Cordonnier et al, 2019.
 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
40098d6be3 Use standard int instead of uint8, int32, etc. 
Much faster with NumPy.
 2020-12-24 14:48:17 +01:00
Gael-de-Sailly
faef1658a9 Fixed map centering, and converted polygon coordinates to map nodes instead of grid nodes. 2020-12-22 16:38:30 +01:00
Gael-de-Sailly
d5cf4a6267 Optionally center the map around x=0 z=0 2020-12-20 22:28:54 +01:00
Gael-de-Sailly
53f88d337d Protect map preview from exceptions 
Since map preview is optional, an exception should not propagate to terrain calculation, so print an error message + traceback but keep the script running.
 2020-11-25 13:12:24 +01:00
Gael-de-Sailly
3644965842 Fix bool settings being improperly loaded as strings 2020-11-17 20:56:02 +01:00
Gael-de-Sailly
9725979363 Fix increments for argument parsing 2020-11-17 20:45:11 +01:00
Gael-de-Sailly
ebacd3cdd4 Add license, update/improve documentation 2020-11-15 11:43:30 +01:00
Gael-de-Sailly
fc0a158385 Disable glaciers by default 2020-11-15 11:26:50 +01:00
Gael-de-Sailly
050ca3b779 Change demo data, update to a grid using new default parameters 2020-11-15 11:19:28 +01:00
Gael-de-Sailly
1f41423104 Print a clear message when grid is ready 
Also use plt.pause before plotting, ensuring plot is updated in real time
 2020-11-15 11:13:42 +01:00
Gael-de-Sailly
52766e8918 Added settingtypes 2020-11-15 11:10:19 +01:00
Gael-de-Sailly
28c674d57c Decrease default diffusion factor 2020-11-14 19:14:09 +01:00
Gael-de-Sailly
90f60ea6fb typo 2020-11-14 19:13:58 +01:00
Gael-de-Sailly
803114aaab Generate data in river_data instead of data 2020-11-14 19:12:12 +01:00
Gael-de-Sailly
9594a79f8b Configurable output directory 
Now relative to the directory the script is *run in*.
 2020-11-14 18:26:13 +01:00
Gael-de-Sailly
d93234c9b7 Moved Python files inside a folder (package), except the 2 that are directly executable 2020-11-14 17:35:27 +01:00
Gael-de-Sailly
7acd0af550 Use biomegen.generate_all 2020-11-14 17:35:03 +01:00
Gael-de-Sailly
3792cd5dc8 Added support for biomegen mod 2020-11-14 17:35:03 +01:00
Gael-de-Sailly
6b9c091dd5 Fix file opening mode on the Lua side, to avoid crashes on Windows 2020-11-14 17:31:36 +01:00
Gael-de-Sailly
b90cecdaf7 Allow command-line options for Python processing 2020-11-14 14:30:53 +01:00
Gael-de-Sailly
c33f2d9582 Python side: rework config system. 
Load `terrain.conf` of the script directory by default.
Add a `terrain_higher.conf` for alternative terrain.
 2020-11-14 12:19:40 +01:00
Gael-de-Sailly
8a15bc924d Dynamic map displaying 
Map is displayed at every iteration if matplotlib library is installed
 2020-11-14 12:05:52 +01:00
Gael-de-Sailly
3fda369fb5 Rewritten map viewer 
Now displays map statistics even if there is no matplotlib
 2020-11-13 11:04:27 +01:00
Gael-de-Sailly
30136bf60a Added scale (blocksize) parameter for view_map.py 2020-11-10 13:19:20 +01:00
Gael-de-Sailly
9475b49b8d Removed duplicate calls to 2 scripts 2020-11-10 13:18:02 +01:00
Gael-de-Sailly
36b49a7fe2 Add settings for parameters in terrain_rivers.py 2020-07-21 14:12:20 +02:00
Gaël de Sailly
103cd49d78 Optionally disable distorsion 
by setting 'mapgen_rivers_distort = false' in minetest.conf
 2020-07-21 14:01:29 +02:00
Gaël de Sailly
25c5cb2e1f Reverse axes order for heightmaps (iterate in Z direction first instead of X) 2020-07-21 12:46:23 +02:00
Gael-de-Sailly
6f43430574 Added glaciers, and re-organized noise definitions 2020-05-24 12:09:21 +02:00
Gael-de-Sailly
625768f967 Added snow and ice in function of temperature. 
Uses noise parameters of builtin biomegen
 2020-05-23 18:13:00 +02:00
Gael-de-Sailly
4edd1a946e Horizontal shifting according to 3D noises: 
makes slopes more irregular and natural-looking, allows overhanging.
This is done by generating an intermediate 2D elevation map and, for each node in 3D, add a 2D offset vector to the position, and seek this position on the heightmap.
 2020-05-23 15:52:16 +02:00