wip

src/game/Global.cpp

@@ -1,4 +1,6 @@
 #include "Global.h"
+#include "bx/constants.h"
+#include "bx/math.h"
 #include <cassert>
 
 namespace
@@ -7,6 +9,31 @@ namespace
   Game::GameInstance* GameInst = nullptr;
 }
 
+Quat Quat::FromEuler(float x, float y, float z)
+{
+  x *= bx::kPi / 180.0f;
+  y *= bx::kPi / 180.0f;
+  z *= bx::kPi / 180.0f;
+
+  float cX = bx::cos(x);
+  float cY = bx::cos(y);
+  float cZ = bx::cos(z);
+  float sX = bx::sin(x);
+  float sY = bx::sin(y);
+  float sZ = bx::sin(z);
+
+  return Quat{
+    cX * cY * cZ - sX * sY * sZ,
+    sY * cX * cZ - sX * sZ * cY,
+    sX * sY * cZ + sZ * cX * cY,
+    sX * cY * cZ + sY * sZ * cX  };
+}
+
+Quat Quat::FromEuler(Vec3 rot)
+{
+  return Quat::FromEuler(rot.X, rot.Y, rot.Z);
+}
+
 namespace Game
 {
   SharedData& GetShared()