+ using Type = unsigned short;
+ using Pos = glm::vec3;
+
+ enum Face {
+ FACE_UP,
+ FACE_DOWN,
+ FACE_RIGHT,
+ FACE_LEFT,
+ FACE_FRONT,
+ FACE_BACK,
+ FACE_COUNT,
+ };
+ enum Turn {
+ TURN_NONE,
+ TURN_LEFT,
+ TURN_AROUND,
+ TURN_RIGHT,
+ TURN_COUNT,
+ };
+
+ Type type;
+ unsigned char orient;
+
+ constexpr explicit Block(Type type = 0, Face face = FACE_UP, Turn turn = TURN_NONE)
+ : type(type), orient(face * TURN_COUNT + turn) { }
+
+ const glm::mat4 &Transform() const;
+
+ Face GetFace() const { return Face(orient / 4); }
+ void SetFace(Face face) { orient = face * TURN_COUNT + GetTurn(); }
+ Turn GetTurn() const { return Turn(orient % 4); }
+ void SetTurn(Turn turn) { orient = GetFace() * TURN_COUNT + turn; }
+
+};