New animation step constructor

luprex/core/cpp/animqueue.hpp

@@ -47,7 +47,7 @@ private:
     int64_t id_;
     std::string action_;
     int bits_;
- 
+
     float facing_;
     util::XYZ xyz_;
     std::string graphic_;
@@ -84,13 +84,30 @@ public:
     const AnimStep &nth(int n) const { return steps_[n]; }
     int size() const { return steps_.size(); }
 
-    // Mutators to create new steps.
+    // Mutators to create new steps from C++
+    //
     void add(int64_t id, const std::string &action);
     void set_facing(float f);
     void set_xyz(util::XYZ xyz);
     void set_graphic(const std::string &g);
     void set_plane(const std::string &p);
 
+    // Mutator to create new steps from lua.
+    //
+    // Lua stack must contain a table, which may contain:
+    //   action: "action"
+    //   facing: 0.0 - 360.0
+    //   x: x-coordinate
+    //   y: y-coordinate
+    //   z: z-coordinate
+    //   dx: delta-x
+    //   dy: delta-y
+    //   dz: delta-z
+    //   graphic: "graphic"
+    //   plane: "plane"
+    //
+    void add(int64_t id, lua_State *L, int idx);
+
     // Get the final resting place after all animations are complete.
     const std::string &get_graphic() const;
     const std::string &get_plane() const;