From 6ac479d04e71ed1494a62de693f459b43d2d5fec Mon Sep 17 00:00:00 2001
From: Nobuyuki <n.umetani@gmail.com>
Date: Mon, 3 Jun 2024 12:09:47 +0900
Subject: [PATCH] small

---
 task07/main.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/task07/main.cpp b/task07/main.cpp
index 2611933..26fc6e0 100644
--- a/task07/main.cpp
+++ b/task07/main.cpp
@@ -13,6 +13,10 @@
 #include "Eigen/Core"
 #include "Eigen/Geometry"
 
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
 /**
  * ray - sphere intersection
  * @param ray_src