for loop problem with opencv

[stullis]

Bonjour! Pardon moi mais j'ecris en anglais parceque mon fracais est inadequate.

The problems appears to stem from x being larger than y on line 53. If the low end of the range is larger than the upper end, the step must be negative.

For example:

# Will not work because the default step is +1
# We cannot add 1 to 200 and end at 100.
for x in range(200,100): 
    print(x) 

# Will print from 200 backwards to 101
for x in range(200,100,-1): 
    print(x)

Off hand, I am not sure how to resolve the issue. The x-axis and y-axis values should be in separate range() calls. Beyond that, I do not understand the objective well enough to provide more. Based on the starting coordinates, how are you determining the destination?