1 files changed, 7 insertions, 1 deletions
diff --git a/geom.hpp b/geom.hpp
index 62e9642..40d6813 100644
--- a/geom.hpp
+++ b/geom.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <stdlib.h>
 #include <math.h>
 #include <algorithm>
 #include <assert.h>
@@ -7,7 +8,12 @@
 #define EPSILON 1e-6
 #define abs(x) ((x)<0?-(x):(x))
 
-double canon_angle(double ref, double move_it){
+inline double frand(double a, double b) {
+	double r = ((double)rand()) / ((double)RAND_MAX);
+	return r * (b - a) + a;
+}
+
+inline 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 ;