72 lines
2.8 KiB
Text
72 lines
2.8 KiB
Text
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boost_cart API
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==============
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This file provides information about the API of boost_cart for the use in
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mods. The API might change slightly when the development goes on, so avoid
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using internal tables or functions which are not documented here.
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Types
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-----
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* `SwitchIgnore` -> `number/nil`
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* Specifies which player control was pressed. This value is used to prefer
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straight rails instead of preferring left and right rail checks.
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* `1`: Ignore left rail
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* `2`: Ignore right rail
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* `nil`: Ignore no rail
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Entity movement
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---------------
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These functions are grouped so that they make sense and then sorted alphabetically.
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* `boost_cart:manage_attachment(player, obj)`
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* Attaches or detaches the player to/from an object, depending on what is
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supplied to `obj`.
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* `player`: `ObjectRef` of the player
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* `obj`: `ObjectRef` (to attach) or `nil` (to detach)
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* `boost_cart:get_sign(n)` -> `number`
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* Returns the sign for the given number. Values: `-1`, `0`, `1`
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* `n`: any `number`
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* `boost_cart:velocity_to_dir(vel)` -> `vector`
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* Returns the cart direction depending on `vel`. Each coordinate can have
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one of the `get_sign()` return values.
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* `vel`: velocity as `vector`
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* `boost_cart:boost_rail(pos, amount)`
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* Sets the rail acceleration for the given position to `amount` and punches
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carts which are at the given position.
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* `pos`: `vector`, rail position
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* `amount`: `number`, negative to brake, positive to boost
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* `boost_cart:get_rail_direction(pos, dir, ctrl, old_switch, railtype)`
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-> `vector, SwitchIgnore`
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* Returns the direction to where the next rail is, and which player control that
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should be ignored in the next call.
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* `pos`: `vector`, position of the cart
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* `dir`: `vector`, movement direction of the cart (see `velocity_to_dir()`)
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* `ctrl`: Player controls table or `nil` (no player)
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* `old_switch`: `SwitchIgnore`
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* `railtype`: (optional) `number`, gets passed indirectly to `is_rail()`
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Rail helper functions
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---------------------
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* `boost_cart:get_rail_groups(groups)` -> `table`
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* Returns a group table with preset values for a common rail node
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* `groups`: (optional) `table`, additional groups append (or overwrite)
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* Hint: To register an incompatible rail type, set the group
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`connect_to_raillike` to the value returned by
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`minetest.raillike_group(new_rail_type)`
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* `boost_cart:is_rail(pos, [railtype])` -> `boolean`
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* Returns whether the node at `pos` is a rail. When `railtype` is specified,
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`true` is only returned when the node is in the same rail group.
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* `pos`: `vector` of the node to check
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* `railtype`: (optional) `number`, rail group number
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* `boost_cart:register_rail(name, def)`
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* Registers a new rail with preset node definition defaults as fallback
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* `name`: `string`, node name of the new rail
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* `def`: Node definition table, containing at least the following keys:
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* `description`
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* `groups`
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* `tiles`
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