check whether two lines (x1,x2) and (x3,x4) on the x-axis do overlap or not

It returns True if they DO overlap, otherwise False

As an example, (1,5) and (2,6) overlaps but not (1,5) and (6,8).

The solution was based on the following schema:

             A0------------------A1
  B0------B1                          B0------B1
  
      if B1<A0 OR B0>A1 then
         Line B does NOT overlap Line A
      else
         Line B DOES ovelap Line A

Therefore, we need to make sure the A and B are ordered:

def swap(X):
    '''
    this function does make sure the pair is 
    ordered (a,b) where a<b
    (10, -5) would become (-5, 10)
    '''
    if X[0]>X[1]:
        return (X[1],X[0])
    return X
  
A, B = swap(A), swap(B)

Proposed solution:

def isOverlapR2(A,B):

# Return True if A Line overlaps B Line; False otherwise

A, B = swap(A), swap(B)

return not (B[1]<A[0] or B[0]>A[1])

In order to call this function, please take a look at the testOverlapV0.py

(venv) C:\work\vanhack\venv\Quiz\test_A>python testOverlapV0.py

This program that accepts two lines (x1,x2) and (x3,x4) on the x-axis and returns whether they overlap (True) or not overlap (False)

Enter total number of lines to check, default=1 pair to check

please add 1 lines to be checked - use comma

(1,2),(3,4) should be typed as 1,2,3,4

1,5,2,6

(1.0, 5.0) (2.0, 6.0) True

True means (1,2) and (5,6) do overlap

Let's check the following pair (1,5) and (6,8)

(1,5) and (6,8) should be entered as below:

1,5,6,8

(1.0, 5.0) (6.0, 8.0) False

False means (1,2) and (6,8) do NOT overlap

Note: We are using float although has no mention about it - set/intersection could also handle it but only for int figures

in order to run it as a batch module, a text file should be created with n pairs (comma separeted) as follow:

first line, number of pair to check second line next pair to check and so on

ex:

4

13 , -6 , -8 , 3

-15 , -6 , 4 , -11

-4 , -2 , 0 , -20

-18 , 9 , 10 , 12

** please check testsample.txt **

python testOverlapV0.py <testsample.txt

This program that accepts two lines (x1,x2) and (x3,x4) on the x-axis and returns whether they overlap Enter total number of lines to check, default=1 pair to check please add 100 lines to be checked - use comma (1,2),(3,4) should be typed as 1,2,3,4

(13.0, -6.0) (-8.0, 3.0) True

(-15.0, -6.0) (4.0, -11.0) True

(-4.0, -2.0) (0.0, -20.0) True

(-18.0, 9.0) (10.0, 12.0) False