Fixed texture, and animation bug in 3dchest

- 3dChests can't be open if the two nodes standing behing them are not air
 - 3dChests now use our textures in inventory, wield, and entity
 - Solves #221

mods/3dchest/depends.txt

@@ -0,0 +1 @@
+default

mods/3dchest/init.lua

@@ -81,8 +81,7 @@ minetest.register_node("3dchest:chest", {
 	tiles = {"default_chest_top.png", "default_chest_top.png", "default_chest_side.png",
 		"default_chest_side.png", "default_chest_side.png", "default_chest_front.png"},
 	paramtype2 = "facedir",
-		-- temporary workaround
-		wield_image = "default_chest_front.png", --minetest.inventorycube("default_chest_top.png", "default_chest_side.png", "default_chest_front.png"),
+	wield_image = minetest.inventorycube("default_chest_top.png", "default_chest_front.png", "default_chest_side.png"),
 	inventory_image = minetest.inventorycube("default_chest_top.png", "default_chest_front.png", "default_chest_side.png"),
 	drawtype = "nodebox",
 	node_box = {
@@ -225,6 +224,20 @@ minetest.register_node("3dchest:chest", {
 		local name = '3dchest:3dchest'
 		local pll = clicker:get_player_name()
 		local formspec = meta:get_string('formspect')
+		local dir = (meta:get_int("dir")+2)%4
+		local directions = {
+			[0] = {x = pos.x, y = pos.y, z = pos.z + 1},
+			[1] = {x = pos.x - 1, y = pos.y, z = pos.z},
+			[2] = {x = pos.x, y = pos.y, z = pos.z - 1},
+			[3] = {x = pos.x + 1, y = pos.y, z = pos.z}
+		}
+		local backnode = minetest.get_node(directions[dir])
+		local upnode = minetest.get_node({x = directions[dir].x, y = directions[dir].y + 1, z = directions[dir].z})
+		if (not backnode or (backnode and backnode.name ~= "air")) 
+			or (not upnode or (upnode and upnode.name ~= "air")) then
+			minetest.chat_send_player(clicker:get_player_name(), "Cannot open chest's lid, move it.")
+			return
+		end
 
 		if not self then
 			minetest.show_formspec(pll, name..'_'..minetest.serialize(pos), formspec)