Fix vector direction flip to turn by 180 degrees

Current buggy behavior turns by 90 degrees

1 files changed, 1 insertions, 1 deletions

diff --git a/lsys.js b/lsys.js
index a458fa7..c3e3466 100644
--- a/lsys.js
+++ b/lsys.js
@@ -72,7 +72,7 @@ function LSystem(axiom, rules, draw_constants) {
           break;
 
         case '|':
-          U += Math.PI / 2;
+          U += Math.PI;
           RUu = true;
           break;
         // push and pop branch