Find the intersection of two lines: Difference between revisions

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 ⍝ The following solver will take ⍵ the matrix of coordinates, one point per row, then massage the argument to extract x,y
 ⍝ and inject 1, where needed
-⍝ Applied twice, we now have a, b and a', b' defining the two lines, we need to resolve it in x and y
+⍝ Applied twice, we now have a, b and a', b' defining the two lines, we need to resolve it in x and y, in order to determine
+⍝ their intersection
 ⍝ y =  ax + b
 ⍝ y = a'x + b'
-⍝ In order to reuse the same solver, we need to format it a little bit, and change the sign of a and a', and multiply (a,b) by (-1, 1):
+⍝ In order to reuse the same solver, we need to format a little bit the arguments, and change the sign of a and a', therefore
+⍝ multiply (a,b) by (-1, 1):
 ⍝ b  =  -ax + y
 ⍝ b' = -a'x + y