Merge pull request #10 from S-S-X/refactor

Refactoring mod structure

1 files changed, 38 insertions, 0 deletions

diff --git a/helpers.lua b/helpers.lua
new file mode 100644
index 0000000..ccd8ebb
--- /dev/null
+++ b/helpers.lua
@@ -0,0 +1,38 @@
+
+-- Try to teleport player away from any closed (on) elevator node.
+elevator.teleport_player_from_elevator = function(player)
+    local function solid(pos)
+        if not minetest.registered_nodes[minetest.get_node(pos).name] then
+            return true
+        end
+        return minetest.registered_nodes[minetest.get_node(pos).name].walkable
+    end
+    local pos = vector.round(player:getpos())
+    local node = minetest.get_node(pos)
+    -- elevator_off is like a shaft, so the player would already be falling.
+    if node.name == "elevator:elevator_on" then
+        local front = vector.subtract(pos, minetest.facedir_to_dir(node.param2))
+        local front_above = vector.add(front, {x=0, y=1, z=0})
+        local front_below = vector.subtract(front, {x=0, y=1, z=0})
+        -- If the front isn't solid, it's ok to teleport the player.
+        if not solid(front) and not solid(front_above) then
+            player:setpos(front)
+        end
+    end
+end
+
+elevator.phash = function(pos)
+    return minetest.pos_to_string(pos)
+end
+
+elevator.punhash = function(pos)
+    return minetest.string_to_pos(pos)
+end
+
+-- Helper function to read unloaded nodes.
+elevator.get_node = function(pos)
+    local node = minetest.get_node_or_nil(pos)
+    if node then return node end
+    local _,_ = VoxelManip():read_from_map(pos, pos)
+    return minetest.get_node_or_nil(pos)
+end