example_dim sometimes bugs

[vhoulbreque]

loading images: 100%|██████████████████████████████████████████████████████| 3/3 [00:01<00:00, 2.78it/s] rotating images: 100%|█████████████████████████████████████████████████████| 3/3 [00:00<00:00, 19.99it/s] resizing images: 100%|█████████████████████████████████████████████████████| 3/3 [00:00<00:00, 11.21it/s] cropping images: 0%| | 0/3 [00:00<?, ?it/s] Traceback (most recent call last): File "example_dim.py", line 40, in angle_max=angle_max) File "/home/houlbreque/anaconda3/envs/ironcarenv/lib/python3.6/site-packages/roadsimulator/layers/layers.py", line 449, in init self.backgrounds = self.generate_all_backgrounds() File "/home/houlbreque/anaconda3/envs/ironcarenv/lib/python3.6/site-packages/roadsimulator/layers/layers.py", line 504, in generate_all_backgrounds x0, y0 = randint(0, b.width - width), randint(0, b.height - height) File "/home/houlbreque/anaconda3/envs/ironcarenv/lib/python3.6/random.py", line 221, in randint return self.randrange(a, b+1) File "/home/houlbreque/anaconda3/envs/ironcarenv/lib/python3.6/random.py", line 199, in randrange raise ValueError("empty range for randrange() (%d,%d, %d)" % (istart, istop, width)) ValueError: empty range for randrange() (0,-48, -48)