From 6ed5abfaa1a26717410601a84d89a57d8c17738c Mon Sep 17 00:00:00 2001
From: Simon Proctor <simon.proctor@zpg.co.uk>
Date: Mon, 23 Sep 2019 17:06:34 +0100
Subject: Intersection of 2 points

---
 challenge-027/simon-proctor/perl6/ch-1.p6 | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 challenge-027/simon-proctor/perl6/ch-1.p6

diff --git a/challenge-027/simon-proctor/perl6/ch-1.p6 b/challenge-027/simon-proctor/perl6/ch-1.p6
new file mode 100644
index 0000000000..6f68aeee29
--- /dev/null
+++ b/challenge-027/simon-proctor/perl6/ch-1.p6
@@ -0,0 +1,29 @@
+#!/usr/bin/env perl6
+
+use v6;
+
+#| Takes 8 points for the lines (a,b) -> (c,d) and (p,q) -> (r,s)
+#| Outputs the intersection
+sub MAIN( Rat() \a, Rat() \b, Rat() \c, Rat() \d,
+          Rat() \p, Rat() \q, Rat() \r, Rat() \s ) {
+
+    my \a1 = d - b; 
+    my \b1 = a - c; 
+    my \c1 = a1*(a) + b1*(b); 
+  
+    my \a2 = s - q; 
+    my \b2 = p - r; 
+    my \c2 = a2*(p)+ b2*(q); 
+  
+    my \determinant = a1*b2 - a2*b1; 
+
+    say "Lines ({a},{b}) -> ({c},{d}) and ({p},{q}) -> ({r},{s})";
+    
+    if ( determinant == 0 ) {
+        say "Lines are parallel. No intersection";
+    } else {
+        my \x = (b2*c1 - b1*c2)/determinant; 
+        my \y = (a1*c2 - a2*c1)/determinant; 
+        say "Intersection at ({x},{y})";
+    }
+}
-- 
cgit