From 3d670c83edebbcbef026402dd916862878ec5c3e Mon Sep 17 00:00:00 2001
From: K Tyl <me@ktyl.dev>
Date: Sat, 6 Jun 2020 18:18:20 +0100
Subject: [PATCH] add common header

---
 src/rtweekend.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/rtweekend.h

diff --git a/src/rtweekend.h b/src/rtweekend.h
new file mode 100644
index 0000000..2ec65b8
--- /dev/null
+++ b/src/rtweekend.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <cmath>
+#include <cstdlib>
+#include <limits>
+#include <memory>
+
+// usings
+
+using std::shared_ptr;
+using std::make_shared;
+using std::sqrt;
+
+// constants
+
+const double infinity = std::numeric_limits<double>::infinity();
+const double pi = 3.1415926535897932385;
+
+// utility functions
+
+inline double degrees_to_radians(double degrees)
+{
+    return degrees * pi / 180;
+}
+
+// common headers
+
+#include "ray.h"
+#include "vec3.h"