Include cmath for vec3.h

hollasch · hollasch · commit db72c637b724 · 2020-05-02T12:11:30.000-07:00
Resolves #501
diff --git a/books/RayTracingInOneWeekend.html b/books/RayTracingInOneWeekend.html
@@ -234,8 +234,11 @@
     #ifndef VEC3_H
     #define VEC3_H
 
+    #include <cmath>
     #include <iostream>
 
+    using std::sqrt;
+
     class vec3 {
         public:
             vec3() : e{0,0,0} {}
@@ -1134,6 +1137,7 @@
 
     using std::shared_ptr;
     using std::make_shared;
+    using std::sqrt;
 
     // Constants
 
diff --git a/src/common/rtweekend.h b/src/common/rtweekend.h
@@ -19,6 +19,7 @@
 
 using std::shared_ptr;
 using std::make_shared;
+using std::sqrt;
 
 // Constants
 
diff --git a/src/common/vec3.h b/src/common/vec3.h
@@ -11,8 +11,10 @@
 // along with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
 //==============================================================================================
 
+#include <cmath>
 #include <iostream>
 
+using std::sqrt;
 
 class vec3 {
     public:
