String and math fixes

- Added missing static String constructors
- Implemented String operator for math types
- Added XYZ and YXZ euler angles methods
- Fixed wrong det checks in Basis
- Fixed operator Quat in Basis

include/core/Basis.hpp

@@ -64,9 +64,13 @@ public:
 
 	Vector3 get_scale() const;
 
-	Vector3 get_euler() const;
+	Vector3 get_euler_xyz() const;
+	void set_euler_xyz(const Vector3 &p_euler);
+	Vector3 get_euler_yxz() const;
+	void set_euler_yxz(const Vector3 &p_euler);
 
-	void set_euler(const Vector3& p_euler);
+	inline Vector3 get_euler() const { return get_euler_yxz(); }
+	inline void set_euler(const Vector3& p_euler) { set_euler_yxz(p_euler); }
 
 	// transposed dot products
 	real_t tdotx(const Vector3& v) const;

include/core/Quat.hpp

@@ -23,12 +23,16 @@ public:
 
 	Quat inverse() const;
 
-	void set_euler(const Vector3& p_euler);
+	void set_euler_xyz(const Vector3& p_euler);
+	Vector3 get_euler_xyz() const;
+	void set_euler_yxz(const Vector3& p_euler);
+	Vector3 get_euler_yxz() const;
+
+	inline void set_euler(const Vector3& p_euler) { set_euler_yxz(p_euler); }
+	inline Vector3 get_euler() const { return get_euler_yxz(); }
 
 	real_t dot(const Quat& q) const;
 
-	Vector3 get_euler() const;
-
 	Quat slerp(const Quat& q, const real_t& t) const;
 
 	Quat slerpni(const Quat& q, const real_t& t) const;

include/core/String.hpp

@@ -37,6 +37,14 @@ public:
 
 	~String();
 
+	static String num(double p_num, int p_decimals = -1);
+	static String num_scientific(double p_num);
+	static String num_real(double p_num);
+	static String num_int64(int64_t p_num, int base = 10, bool capitalize_hex = false);
+	static String chr(godot_char_type p_char);
+	static String md5(const uint8_t *p_md5);
+	static String hex_encode_buffer(const uint8_t *p_buffer, int p_len);
+
 	wchar_t &operator[](const int idx);
 	wchar_t operator[](const int idx) const;