1{
2    "sphere_radius": 0.75,
3    "sphere_density": 1,
4
5    "box_X": 400,
6    "box_Y": 400,
7    "box_Z": 100,
8
9    "time_integrator" : "centered_difference",
10
11    "step_size": 1e-4,
12    "time_end": 1,
13
14    "grav_X": 0,
15    "grav_Y": 0,
16    "grav_Z": -980,
17
18    "normalStiffS2S": 1e8,
19    "normalStiffS2W": 1e8,
20
21    "normalDampS2S": 1e2,
22    "normalDampS2W": 1e2,
23
24    "tangentStiffS2S": 1e8,
25    "tangentStiffS2W": 1e8,
26
27    "tangentDampS2S": 1e2,
28    "tangentDampS2W": 1e2,
29
30    "friction_mode" : "multi_step",
31    "static_friction_coeffS2S": 0.5,
32    "static_friction_coeffS2W": 0.5,
33
34    "rolling_mode" : "schwartz",
35    "rolling_friction_coeffS2S" : 0.5,
36    "rolling_friction_coeffS2W" : 0.5,
37
38    "cohesion_ratio": 5,
39    "adhesion_ratio_s2w": 0,
40
41    "verbose": 0,
42
43    "psi_T": 32,
44    "psi_L": 16,
45    "output_dir": "terrain",
46    "write_mode": "csv"
47}
48