forked from minetest-mods/nether
152 lines
6.4 KiB
Plaintext
152 lines
6.4 KiB
Plaintext
Portal API Reference
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====================
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The portal system used to get to the Nether can be used to create portals
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to other realms.
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Portal code is more efficient when each type of portal uses a different type
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of node to build its frame out of, however it is possible to register more than
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one kind of portal with the same frame material — such as obsidian — provided
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the size of the PortalShape is distinct from any other type of portal that is
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using the same node as its frame, and portal sizes remain small.
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Helper functions
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----------------
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* `nether.volume_is_natural(minp, maxp)`: returns a boolean
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* use this when determining where to spawn a portal, to avoid overwriting
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player builds. It checks the area for any nodes that aren't ground or
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trees.
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* `nether.find_surface_target_y(target_x, target_z, portal_name)`: returns a
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suitable anchorPos
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* Can be used when implementing custom find_surface_anchorPos() functions
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* portal_name is optional, providing it allows existing portals on the
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surface to be reused.
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* `nether.find_nearest_working_portal(portal_name, anchorPos, distance_limit, y_factor)`: returns
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an anchorPos, or nil if no portal was found within the the distance_limit.
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* A y_factor of 0 means y does not affect the distance_limit, a y_factor
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of 1 means y is included (the default if y_factor is nil), and a y_factor
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of 2 would squash the search-sphere by a factor of 2 on the y-axis, etc.
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* Only portals in the same realm as the anchorPos will be returned, even if
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y_factor is 0.
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* Pass a nil (or negative) distance_limit to indicate no distance limit
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API functions
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-------------
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Call these functions only at load time:
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* `nether.register_portal(name, portal_definition)`
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* Returns true on success. Can return false if the portal definition
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clashes with a portal already registered by another mod, e.g. if the size
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and frame node is not unique.
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* `nether.unregister_portal(name)`
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* Unregisters the portal from the engine, and deletes the entry with key
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`name` from `nether.registered_portals` and associated internal tables.
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* Returns true on success
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* register_portal_ignition_item(name, ignition_failure_sound)
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* ignition_failure_sound is optional, it plays any time an attempt to use
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the item occurs if a portal is not ignited.
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Portal definition
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-----------------
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Used by `nether.register_portal`.
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{
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shape = PortalShape_Traditional,
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-- optional.
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wormhole_node_name = "nether:portal",
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-- optional. Allows a custom wormhole node to be specified.
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-- Useful if you want the portals to have a different post_effect_color
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-- or texture.
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wormhole_node_color = 0,
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-- A value from 0 to 7 corresponding to the color of pixels in
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-- nether_portals_palette.png:
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-- 0 traditional/magenta
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-- 1 black
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-- 2 blue
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-- 3 green
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-- 4 cyan
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-- 5 red
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-- 6 yellow
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-- 7 white
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particle_color = "#808",
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-- Optional. Will default to a colour matching the wormhole_node_color
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-- if not specified.
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particle_texture = "image.png",
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-- Optional. Animation and particle scale may also be specified, e.g:
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-- particle_texture = {
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-- name = "nether_particle_anim1.png",
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-- animation = {
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-- type = "vertical_frames",
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-- aspect_w = 7,
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-- aspect_h = 7,
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-- length = 1,
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-- },
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-- scale = 1.5
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-- },
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-- See lua_api.txt for Tile Animation definition
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frame_node_name = "default:obsidian",
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-- Required. For best results, have your portal constructed of a
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-- material nobody else is using.
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sounds = {
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ambient = <SimpleSoundSpec>,
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-- if the ambient SimpleSoundSpec is a table it can also contain a
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-- "length" int, which is the number of seconds to wait before
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-- repeating the ambient sound. Default is 3.
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ignite = <SimpleSoundSpec>,
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extinguish = <SimpleSoundSpec>,
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teleport = <SimpleSoundSpec>,
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}
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within_realm = function(pos),
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-- Required. Return true if a portal at pos is in the realm, rather
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than the surface world.
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find_realm_anchorPos = function(surface_anchorPos),
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-- Required. Return a position in the realm that a portal created at
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-- surface_anchorPos will link to.
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-- Return an anchorPos or anchorPos, orientation
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-- If orientation is not specified then the orientation of the surface
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-- portal will be used.
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-- If the location of an existing portal is returned then include the
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-- orientation, otherwise the existing portal could be overwritten by
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-- a new one with the orientation of the surface portal.
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find_surface_anchorPos = function(realm_anchorPos),
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-- Optional. If you don't implement this then a position near the
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-- surface will be picked.
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-- Return an anchorPos or (anchorPos, orientation)
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-- If orientation is not specified then the orientation of the realm
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-- portal will be used.
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-- If the location of an existing portal is returned then include the
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-- orientation, otherwise the existing portal could be overwritten by
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-- a new one with the orientation of the realm portal.
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on_run_wormhole = function(portalDef, anochorPos, orientation),
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-- invoked once per second per portal
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on_extinguish = function(portalDef, anochorPos, orientation),
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-- invoked when a portal is extinguished, including when the portal
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-- it connected to was extinguished.
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on_player_teleported = function(portalDef, player, oldPos, newPos),
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-- invoked immediately after a player is teleported
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on_ignite = function(portalDef, anochorPos, orientation)
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-- invoked when a player or mesecon ignites a portal
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on_created = function(portalDef, anochorPos, orientation)
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-- invoked when a portal's remote twin is created, usually when a
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-- player travels through a portal for the first time.
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}
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