From 74fb9253d61e29cbe8dd0125cbbeda3069b096b5 Mon Sep 17 00:00:00 2001
From: Jean Fabre-Monplaisir <jean-isaac-fm@live.fr>
Date: Sun, 1 Feb 2015 19:21:28 +0100
Subject: add canon_angle

---
 geom.hpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/geom.hpp b/geom.hpp
index 06b9e65..62e9642 100644
--- a/geom.hpp
+++ b/geom.hpp
@@ -7,6 +7,12 @@
 #define EPSILON 1e-6
 #define abs(x) ((x)<0?-(x):(x))
 
+double canon_angle(double ref, double move_it){
+    while (ref>move_it) move_it += 2*M_PI;
+    while (move_it >= ref + 2*M_PI) move_it -= 2*M_PI;
+    return move_it ;
+}
+
 struct vec {
 	double x, y;
 
-- 
cgit v1.2.3