Fixed math problem and display submeshes in editor panel

Nuake/src/Core/Maths.cpp

@@ -0,0 +1,12 @@
+#include "src/Core/Maths.h"
+
+using namespace Nuake;
+
+Quat Nuake::QuatFromEuler(float x, float y, float z)
+{
+	// Taken from: https://gamedev.stackexchange.com/questions/13436/glm-euler-angles-to-quaternion
+	Quat QuatAroundX = Quat(x, Vector3(1.0, 0.0, 0.0));
+	Quat QuatAroundY = Quat(y, Vector3(0.0, 1.0, 0.0));
+	Quat QuatAroundZ = Quat(z, Vector3(0.0, 0.0, 1.0));
+	return QuatAroundX * QuatAroundY * QuatAroundZ;
+}