27 current logic to quit game causes simharness vectorized environment setup to crash

[afennelly-mitre]

This PR adds

1. num_active_games class variable to the simfire.game.Game class
2. minor updates to simfire/utils/layers.py that update the retrieval of landfire tif data (used to build the LandfireLatLongBox). The updates help ensure that if the respective output path exists but does not contain any .tif files, the tif data will be pulled as if the directory did not exist.

The addition of 2. resolves #26, which I added to this PR since it was already a very small amount of changes.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
simfire/game
game.py	198	25	87%	50, 76–80, 250–251, 292–293, 311–315, 344, 346, 348, 353, 356–363, 389, 402–403, 406–407
image.py	19	2	89%	20, 31
sprites.py	177	6	97%	79, 85, 90, 96, 328, 434
simfire/game/managers
fire.py	204	5	98%	223, 265–269, 643, 782
mitigation.py	44	1	98%	73
simfire/sim
simulation.py	418	122	71%	73, 83, 93, 103, 113, 129, 140, 150, 170, 181, 324, 416–423, 457–478, 549, 615–628, 648–661, 679, 696, 768, 805–806, 808–809, 839, 858, 871, 892–959, 1017–1021, 1040–1051, 1065–1103
simfire/utils
config.py	465	126	73%	68–81, 110, 212, 232, 246–253, 278–298, 309–316, 362–364, 382–384, 386–388, 407–418, 540, 555, 559, 563, 600–647, 666, 677–678, 681, 685, 695, 720, 726, 730, 741, 779–790, 813, 820, 828, 846–870, 964, 977, 1000, 1009–1030
decorators.py	13	8	38%	15–23
generate_cfd_wind_layer.py	86	71	17%	25–34, 38–56, 60–68, 72–82, 86–122, 126
graph.py	67	6	91%	107–108, 113, 119, 227, 252
layers.py	271	57	79%	82, 86–87, 134–139, 180, 198, 205, 346–355, 358–399, 405–412, 595, 624
log.py	32	10	69%	11–12, 15–16, 21, 27, 36–38, 41
terrain.py	38	8	79%	127–136
units.py	25	4	84%	15–16, 29–31
simfire/utils/_tests
test_layers.py	89	3	97%	102, 131, 192
simfire/world
elevation_functions.py	24	1	96%	100
simfire/world/wind_mechanics
cfd_wind.py	150	39	74%	63–73, 76–95, 130–134, 140–144, 188, 272, 274, 279, 281
perlin_wind.py	35	1	97%	42
wind_controller.py	66	37	44%	119–146, 157–170, 173, 176, 179, 182, 185
TOTAL	3641	532	85%

Tests	Skipped	Failures	Errors	Time
97	0 💤	0 ❌	0 🔥	8m 11s ⏱️

[afennelly-mitre]

@doyled-it this PR is ready to go, please review at your leisure.

[doyled-it]

Looks good to me. There will be merge conflicts with #24, but we'll cross that bridge over there.

[afennelly-mitre]

Looks good to me. There will be merge conflicts with #24, but we'll cross that bridge over there.

Makes sense - hopefully just a quick rebase will be sufficient since there are so few changes.