fixed bugs on windows

src/GUI/MainWindow.cpp

@@ -6,6 +6,7 @@
 #include "../format.hpp"
 #include "../Resources/fonts.hpp"
 #include "../Resources/textures.hpp"
+#include "../math.hpp"
 
 namespace ougge::GUI {
 

src/math.hpp

@@ -3,6 +3,22 @@
 #include "std.hpp"
 #include <cmath>
 
+#ifndef M_PI
+    #define M_E		2.7182818284590452354
+    #define M_LOG2E		1.4426950408889634074
+    #define M_LOG10E	0.43429448190325182765
+    #define M_LN2		0.69314718055994530942
+    #define M_LN10		2.30258509299404568402
+    #define M_PI		3.14159265358979323846
+    #define M_PI_2		1.57079632679489661923
+    #define M_PI_4		0.78539816339744830962
+    #define M_1_PI		0.31830988618379067154
+    #define M_2_PI		0.63661977236758134308
+    #define M_2_SQRTPI	1.12837916709551257390
+    #define M_SQRT2		1.41421356237309504880
+    #define M_SQRT1_2	0.70710678118654752440
+#endif
+
 struct Vec2 {
     f32 x = 0, y = 0;
 };