refactored MainWindow and Engine, changed project structure

src/common/math.hpp

@@ -0,0 +1,47 @@
+#pragma once
+
+#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;
+};
+
+struct Vec3 {
+    f32 x = 0, y = 0, z = 0;
+};
+
+struct Vec4 {
+    f32 x = 0, y = 0, z = 0, w = 0;
+};
+
+/// radians
+typedef f32 angle_t;
+
+static inline angle_t normalizeAngle(angle_t a){
+    return std::fmodf(a + M_PI, 2*M_PI) - M_PI;
+}
+
+static inline f32 angleToDegree(angle_t a){
+    return (a / M_PI) * 180;
+}
+
+static inline angle_t degreeToRadian(f32 d){
+    return (d / 180) * M_PI;
+}