add _USE_MATH_DEFINES for msvc M_PI in math.h

diff --git a/include/vkh.h b/include/vkh.h
index 7f41e5a908b220b24cb5c46229957730d7870118..a56c69a42e7db3c919bfcd68661aea925bf92ceb 100644 (file)
--- a/include/vkh.h
+++ b/include/vkh.h
@@ -36,6 +36,8 @@ typedef enum VmaMemoryUsage VmaMemoryUsage;
 #include <assert.h>
 #include <stdbool.h>
 #include <stdint.h>
+
+#define _USE_MATH_DEFINES   //to have M_PI* defined with MSVC
 #include <math.h>
 
 #define VKH_KO      0x00000400