A few animation primitives

luprex/core/cpp/world.cpp

@@ -37,6 +37,12 @@ World::World() {
     assert (lua_gettop(state()) == 0);
 }
 
+void Tangible::update_plane_item() {
+    util::XYZ xyz = anim_queue_.get_xyz();
+    std::string plane = anim_queue_.get_plane();
+    plane_item_.set_pos(plane, xyz.x, xyz.y, xyz.z);
+}
+
 void Tangible::be_a_player() {
     if (id_player_pool_ == nullptr) {
         id_player_pool_.reset(new IdPlayerPool(&world_->id_global_pool_));
@@ -78,6 +84,25 @@ Tangible *World::tangible_get(int64_t id) {
     }
 }
 
+Tangible *World::tangible_get(lua_State *L, int idx) {
+    Tangible *result = nullptr;
+    int top = lua_gettop(L);
+    if (lua_istable(L, idx)) {
+        lua_getmetatable(L, idx);
+        if (lua_istable(L, -1)) {
+            lua_pushstring(L, "id");
+            lua_rawget(L, -2);
+            lua_Number id = lua_tonumber(L, -1);
+            result = tangible_get(int64_t(id));
+        }
+    }
+    lua_settop(L, top);
+    if (result == nullptr) {
+        luaL_error(L, "parameter is not a tangible");
+    }
+    return result;
+}
+
 std::vector<int64_t> World::get_near(int64_t player_id, float radius) {
     Tangible *player = tangible_get(player_id);
 
@@ -327,14 +352,31 @@ void World::run_scheduled_threads(int64_t clk) {
     LS.result();
 }
 
-LuaDefine(tangible_get, "c") {
-    LuaArg id;
-    LuaRet database;
-    LuaVar tangibles;
-    LuaStack LS(L, id, database, tangibles);
+LuaDefine(tangible_xyz, "c") {
+    LuaArg tanobj;
+    LuaRet X, Y, Z;
+    LuaStack LS(L, tanobj, X, Y, Z);
+    World *w = World::fetch_global_pointer(L);
+    Tangible *tan = w->tangible_get(L, tanobj.index());
+    util::XYZ xyz = tan->anim_queue_.get_xyz();
+    LS.set(X, xyz.x);
+    LS.set(Y, xyz.y);
+    LS.set(Z, xyz.z);
+    return LS.result();
+}
 
-    LS.rawget(tangibles, LuaRegistry, "tangibles");
-    LS.rawget(database, tangibles, id);
+LuaDefine(tangible_walkto, "c") {
+    LuaArg tanobj, x, y, z;
+    LuaStack LS(L, tanobj, x, y, z);
+    World *w = World::fetch_global_pointer(L);
+    lua_Number nx = LS.cknumber(x);
+    lua_Number ny = LS.cknumber(y);
+    lua_Number nz = LS.cknumber(z);
+    Tangible *tan = w->tangible_get(L, tanobj.index());
+    int64_t id = w->id_global_pool_.alloc_id_for_thread(L);
+    tan->anim_queue_.add(id, "walk");
+    tan->anim_queue_.set_xyz(util::XYZ(nx, ny, nz));
+    tan->update_plane_item();
     return LS.result();
 }
 

luprex/core/cpp/world.hpp

@@ -43,6 +43,7 @@ public:
     std::unique_ptr<IdPlayerPool> id_player_pool_;
 
     void be_a_player();
+    void update_plane_item();
 };
 
 class World {
@@ -110,6 +111,13 @@ public:
     // Get a pointer to the specified tangible.
     //
     Tangible *tangible_get(int64_t id);
+
+    // Get a pointer to the specified tangible.
+    //
+    // The value on the lua stack should be a valid lua tangible.  If not,
+    // a lua error is generated.
+    //
+    Tangible *tangible_get(lua_State *L, int idx);
     
     // Delete a tangible with the specified ID.
     //