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portal_api.lua
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portal_api.lua
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--[[
Portal API for Minetest
See portal_api.txt for documentation
--
Copyright (C) 2020 Treer
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
]]--
-- setting DEBUG_IGNORE_MODSTORAGE true prevents portals from knowing where other
-- portals are, forcing find_realm_anchorpos() etc. to be executed every time.
local DEBUG_IGNORE_MODSTORAGE = false
nether.registered_portals = {}
nether.registered_portals_count = 0
-- Exposes a list of node names that are used as frame nodes by registered portals
nether.is_frame_node = {}
-- gives the colour values in nether_portals_palette.png that are used by the wormhole colorfacedir
-- hardware colouring.
nether.portals_palette = {
[0] = {r = 128, g = 0, b = 128, asString = "#800080"}, -- traditional/magenta
[1] = {r = 0, g = 0, b = 0, asString = "#000000"}, -- black
[2] = {r = 19, g = 19, b = 255, asString = "#1313FF"}, -- blue
[3] = {r = 55, g = 168, b = 0, asString = "#37A800"}, -- green
[4] = {r = 141, g = 237, b = 255, asString = "#8DEDFF"}, -- cyan
[5] = {r = 221, g = 0, b = 0, asString = "#DD0000"}, -- red
[6] = {r = 255, g = 240, b = 0, asString = "#FFF000"}, -- yellow
[7] = {r = 255, g = 255, b = 255, asString = "#FFFFFF"} -- white
}
if minetest.get_mod_storage == nil then
error(nether.modname .. " does not support Minetest versions earlier than 0.4.16", 0)
end
local S = nether.get_translator
nether.portal_destination_not_found_message =
S("Mysterious forces prevented you from opening that portal. Please try another location")
--[[
Positions
=========
p1 & p2 p1 and p2 is the system used by earlier versions of the nether mod, which the portal_api
is forwards and backwards compatible with.
p1 is the bottom/west/south corner of the portal, and p2 is the opposite corner, together
they define the bounding volume for the portal.
The value of p1 and p2 is kept in the metadata of every node in the portal
WormholePos The location of the node that a portal's target is set to, and a player is teleported
to. It can also be used to test whether a portal is active.
AnchorPos Introduced by the portal_api. Coordinates for portals are normally given in terms of
the AnchorPos. The AnchorPos does not change with portal orientation - portals rotate
around the AnchorPos. Ideally an AnchorPos would be near the bottom center of a portal
shape, but this is not the case with PortalShape_Traditional to keep comptaibility with
earlier versions of the nether mod.
Usually an orientation is required with an AnchorPos.
Orientation is yaw, either 0 or 90, 0 meaning a portal that faces north/south - i.e. obsidian
running east/west.
TimerPos The portal_api replaces ABMs with a single node timer per portal, and the TimerPos is the
node in which that timer is located. Extra metadata is also kept in the TimerPos node.
Portal shapes
=============
For the PortalShape_Traditional implementation, p1, p2, anchorPos, wormholdPos and TimerPos are defined
as follows:
.
+--------+--------+--------+--------+
| | Frame | |
| | | | p2 |
+--------+--------+--------+--------+
| | | |
| | | |
+--------+ + +--------+
| | Wormhole | |
| | | |
+--------+ + +--------+
| |Wormhole | |
| | Pos | |
+--------+--------+--------+--------+
AnchorPos|TimerPos| | |
| p1 | | | |
+--------+--------+--------+--------+
+X/East or +Z/North ----->
A better location for AnchorPos would be directly under WormholePos, as it's more centered
and you don't need to know the portal's orientation to find AnchorPos from the WormholePos
or vice-versa, however AnchorPos is in the bottom/south/west-corner to keep compatibility
with earlier versions of nether mod (which only records portal corners p1 & p2 in the node
metadata).
]]
local facedir_up, facedir_north, facedir_south, facedir_east, facedir_west, facedir_down = 0, 4, 8, 12, 16, 20
local __ = {name = "air", prob = 0}
local AA = {name = "air", prob = 255, force_place = true}
local ON = {name = "default:obsidian", facedir = facedir_north + 0, prob = 255, force_place = true}
local ON2 = {name = "default:obsidian", facedir = facedir_north + 1, prob = 255, force_place = true}
local ON3 = {name = "default:obsidian", facedir = facedir_north + 2, prob = 255, force_place = true}
local ON4 = {name = "default:obsidian", facedir = facedir_north + 3, prob = 255, force_place = true}
local OS = {name = "default:obsidian", facedir = facedir_south, prob = 255, force_place = true}
local OE = {name = "default:obsidian", facedir = facedir_east, prob = 255, force_place = true}
local OW = {name = "default:obsidian", facedir = facedir_west, prob = 255, force_place = true}
local OU = {name = "default:obsidian", facedir = facedir_up + 0, prob = 255, force_place = true}
local OU2 = {name = "default:obsidian", facedir = facedir_up + 1, prob = 255, force_place = true}
local OU3 = {name = "default:obsidian", facedir = facedir_up + 2, prob = 255, force_place = true}
local OU4 = {name = "default:obsidian", facedir = facedir_up + 3, prob = 255, force_place = true}
local OD = {name = "default:obsidian", facedir = facedir_down, prob = 255, force_place = true}
-- facedirNodeList is a list of node references which should have their facedir value copied into
-- param2 before placing a schematic. The facedir values will only be copied when the portal's frame
-- node has a paramtype2 of "facedir" or "colorfacedir".
-- Having schematics provide this list avoids needing to check every node in the schematic volume.
local facedirNodeList = {ON, ON2, ON3, ON4, OS, OE, OW, OU, OU2, OU3, OU4, OD}
-- This object defines a portal's shape, segregating the shape logic code from portal behaviour code.
-- You can create a new "PortalShape" definition object which implements the same
-- functions if you wish to register a custom shaped portal in register_portal(). Examples of other
-- shapes follow after PortalShape_Traditional.
-- Since it's symmetric, this PortalShape definition has only implemented orientations of 0 and 90
nether.PortalShape_Traditional = {
name = "Traditional",
size = vector.new(4, 5, 1), -- size of the portal, and not necessarily the size of the schematic,
-- which may clear area around the portal.
is_horizontal = false, -- whether the wormhole is a vertical or horizontal surface
diagram_image = {
image = "nether_book_diagram_traditional.png", -- The diagram to be shown in the Book of Portals
width = 142,
height = 305
},
-- returns the coords for minetest.place_schematic() that will place the schematic on the anchorPos
get_schematicPos_from_anchorPos = function(anchorPos, orientation)
assert(orientation, "no orientation passed")
if orientation == 0 then
return {x = anchorPos.x, y = anchorPos.y, z = anchorPos.z - 2}
else
return {x = anchorPos.x - 2, y = anchorPos.y, z = anchorPos.z }
end
end,
get_wormholePos_from_anchorPos = function(anchorPos, orientation)
assert(orientation, "no orientation passed")
if orientation == 0 then
return {x = anchorPos.x + 1, y = anchorPos.y + 1, z = anchorPos.z }
else
return {x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z + 1}
end
end,
get_anchorPos_from_wormholePos = function(wormholePos, orientation)
assert(orientation, "no orientation passed")
if orientation == 0 then
return {x = wormholePos.x - 1, y = wormholePos.y - 1, z = wormholePos.z }
else
return {x = wormholePos.x, y = wormholePos.y - 1, z = wormholePos.z - 1}
end
end,
-- p1 and p2 are used to keep maps compatible with earlier versions of this mod.
-- p1 is the bottom/west/south corner of the portal, and p2 is the opposite corner, together
-- they define the bounding volume for the portal.
get_p1_and_p2_from_anchorPos = function(self, anchorPos, orientation)
assert(orientation, "no orientation passed")
assert(self ~= nil and self.name == nether.PortalShape_Traditional.name, "Must pass self as first argument, or use shape:func() instead of shape.func()")
local p1 = anchorPos -- PortalShape_Traditional puts the anchorPos at p1 for backwards&forwards compatibility
local p2
if orientation == 0 then
p2 = {x = p1.x + self.size.x - 1, y = p1.y + self.size.y - 1, z = p1.z }
else
p2 = {x = p1.x, y = p1.y + self.size.y - 1, z = p1.z + self.size.x - 1}
end
return p1, p2
end,
get_anchorPos_and_orientation_from_p1_and_p2 = function(p1, p2)
if p1.z == p2.z then
return p1, 0
elseif p1.x == p2.x then
return p1, 90
else
-- this KISS implementation will break you've made a 3D PortalShape definition
minetest.log("error", "get_anchorPos_and_orientation_from_p1_and_p2 failed on p1=" .. minetest.pos_to_string(p1) .. " p2=" .. minetest.pos_to_string(p2))
end
end,
-- returns true if function was applied to all frame nodes
apply_func_to_frame_nodes = function(anchorPos, orientation, func)
-- a 4x5 portal is small enough that hardcoded positions is simpler that procedural code
local shortCircuited
if orientation == 0 then
-- use short-circuiting of boolean evaluation to allow func() to cause an abort by returning true
shortCircuited =
func({x = anchorPos.x + 0, y = anchorPos.y, z = anchorPos.z}) or
func({x = anchorPos.x + 1, y = anchorPos.y, z = anchorPos.z}) or
func({x = anchorPos.x + 2, y = anchorPos.y, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y, z = anchorPos.z}) or
func({x = anchorPos.x + 0, y = anchorPos.y + 4, z = anchorPos.z}) or
func({x = anchorPos.x + 1, y = anchorPos.y + 4, z = anchorPos.z}) or
func({x = anchorPos.x + 2, y = anchorPos.y + 4, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 4, z = anchorPos.z}) or
func({x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z}) or
func({x = anchorPos.x, y = anchorPos.y + 2, z = anchorPos.z}) or
func({x = anchorPos.x, y = anchorPos.y + 3, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 1, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 2, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 3, z = anchorPos.z})
else
shortCircuited =
func({x = anchorPos.x, y = anchorPos.y, z = anchorPos.z + 0}) or
func({x = anchorPos.x, y = anchorPos.y, z = anchorPos.z + 1}) or
func({x = anchorPos.x, y = anchorPos.y, z = anchorPos.z + 2}) or
func({x = anchorPos.x, y = anchorPos.y, z = anchorPos.z + 3}) or
func({x = anchorPos.x, y = anchorPos.y + 4, z = anchorPos.z + 0}) or
func({x = anchorPos.x, y = anchorPos.y + 4, z = anchorPos.z + 1}) or
func({x = anchorPos.x, y = anchorPos.y + 4, z = anchorPos.z + 2}) or
func({x = anchorPos.x, y = anchorPos.y + 4, z = anchorPos.z + 3}) or
func({x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z }) or
func({x = anchorPos.x, y = anchorPos.y + 2, z = anchorPos.z }) or
func({x = anchorPos.x, y = anchorPos.y + 3, z = anchorPos.z }) or
func({x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z + 3}) or
func({x = anchorPos.x, y = anchorPos.y + 2, z = anchorPos.z + 3}) or
func({x = anchorPos.x, y = anchorPos.y + 3, z = anchorPos.z + 3})
end
return not shortCircuited
end,
-- returns true if function was applied to all wormhole nodes
apply_func_to_wormhole_nodes = function(anchorPos, orientation, func)
local shortCircuited
if orientation == 0 then
local wormholePos = {x = anchorPos.x + 1, y = anchorPos.y + 1, z = anchorPos.z}
-- use short-circuiting of boolean evaluation to allow func() to cause an abort by returning true
shortCircuited =
func({x = wormholePos.x + 0, y = wormholePos.y + 0, z = wormholePos.z}) or
func({x = wormholePos.x + 1, y = wormholePos.y + 0, z = wormholePos.z}) or
func({x = wormholePos.x + 0, y = wormholePos.y + 1, z = wormholePos.z}) or
func({x = wormholePos.x + 1, y = wormholePos.y + 1, z = wormholePos.z}) or
func({x = wormholePos.x + 0, y = wormholePos.y + 2, z = wormholePos.z}) or
func({x = wormholePos.x + 1, y = wormholePos.y + 2, z = wormholePos.z})
else
local wormholePos = {x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z + 1}
shortCircuited =
func({x = wormholePos.x, y = wormholePos.y + 0, z = wormholePos.z + 0}) or
func({x = wormholePos.x, y = wormholePos.y + 0, z = wormholePos.z + 1}) or
func({x = wormholePos.x, y = wormholePos.y + 1, z = wormholePos.z + 0}) or
func({x = wormholePos.x, y = wormholePos.y + 1, z = wormholePos.z + 1}) or
func({x = wormholePos.x, y = wormholePos.y + 2, z = wormholePos.z + 0}) or
func({x = wormholePos.x, y = wormholePos.y + 2, z = wormholePos.z + 1})
end
return not shortCircuited
end,
-- Check for whether the portal is blocked in, and if so then provide a safe way
-- on one side for the player to step out of the portal. Suggest including a roof
-- incase the portal was blocked with lava flowing from above.
-- If portal can appear in mid-air then can also check for that and add a platform.
disable_portal_trap = function(anchorPos, orientation)
assert(orientation, "no orientation passed")
-- Not implemented yet. It may not need to be implemented because if you
-- wait in a portal long enough you teleport again. So a trap portal would have to link
-- to one of two blocked-in portals which link to each other - which is possible, but
-- quite extreme.
end,
schematic = {
size = {x = 4, y = 5, z = 5},
data = { -- note that data is upside down
__,__,__,__,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
__,__,__,__,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
ON,OW,OE,ON2,
OU,AA,AA,OU,
OU,AA,AA,OU,
OU,AA,AA,OU,
ON4,OE,OW,ON3,
__,__,__,__,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
__,__,__,__,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
AA,AA,AA,AA,
},
facedirNodes = facedirNodeList
}
} -- End of PortalShape_Traditional class
-- Example alternative PortalShape
nether.PortalShape_Circular = {
name = "Circular",
size = vector.new(7, 7, 1), -- size of the portal, and not necessarily the size of the schematic,
-- which may clear area around the portal.
is_horizontal = false, -- whether the wormhole is a vertical or horizontal surface
diagram_image = {
image = "nether_book_diagram_circular.png", -- The diagram to be shown in the Book of Portals
width = 149,
height = 243
},
-- returns the coords for minetest.place_schematic() that will place the schematic on the anchorPos
get_schematicPos_from_anchorPos = function(anchorPos, orientation)
assert(orientation, "no orientation passed")
if orientation == 0 then
return {x = anchorPos.x - 3, y = anchorPos.y, z = anchorPos.z - 3}
else
return {x = anchorPos.x - 3, y = anchorPos.y, z = anchorPos.z - 3 }
end
end,
get_wormholePos_from_anchorPos = function(anchorPos, orientation)
-- wormholePos is the node above anchorPos
return {x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z}
end,
get_anchorPos_from_wormholePos = function(wormholePos, orientation)
-- wormholePos is the node above anchorPos
return {x = wormholePos.x, y = wormholePos.y - 1, z = wormholePos.z}
end,
-- p1 and p2 are used to keep maps compatible with earlier versions of this mod.
-- p1 is the bottom/west/south corner of the portal, and p2 is the opposite corner, together
-- they define the bounding volume for the portal.
get_p1_and_p2_from_anchorPos = function(self, anchorPos, orientation)
assert(orientation, "no orientation passed")
assert(self ~= nil and self.name == nether.PortalShape_Circular.name, "Must pass self as first argument, or use shape:func() instead of shape.func()")
local p1
local p2
if orientation == 0 then
p1 = {x = anchorPos.x - 3, y = anchorPos.y, z = anchorPos.z }
p2 = {x = p1.x + self.size.x - 1, y = p1.y + self.size.y - 1, z = p1.z }
else
p1 = {x = anchorPos.x, y = anchorPos.y, z = anchorPos.z - 3 }
p2 = {x = p1.x, y = p1.y + self.size.y - 1, z = p1.z + self.size.x - 1}
end
return p1, p2
end,
get_anchorPos_and_orientation_from_p1_and_p2 = function(p1, p2)
if p1.z == p2.z then
return {x= p1.x + 3, y = p1.y, z = p1.z }, 0
elseif p1.x == p2.x then
return {x= p1.x, y = p1.y, z = p1.z + 3}, 90
end
end,
apply_func_to_frame_nodes = function(anchorPos, orientation, func)
local shortCircuited
if orientation == 0 then
-- use short-circuiting of boolean evaluation to allow func() to cause an abort by returning true
shortCircuited =
func({x = anchorPos.x + 0, y = anchorPos.y + 0, z = anchorPos.z}) or
func({x = anchorPos.x + 1, y = anchorPos.y + 0, z = anchorPos.z}) or func({x = anchorPos.x - 1, y = anchorPos.y + 0, z = anchorPos.z}) or
func({x = anchorPos.x + 2, y = anchorPos.y + 1, z = anchorPos.z}) or func({x = anchorPos.x - 2, y = anchorPos.y + 1, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 2, z = anchorPos.z}) or func({x = anchorPos.x - 3, y = anchorPos.y + 2, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 3, z = anchorPos.z}) or func({x = anchorPos.x - 3, y = anchorPos.y + 3, z = anchorPos.z}) or
func({x = anchorPos.x + 3, y = anchorPos.y + 4, z = anchorPos.z}) or func({x = anchorPos.x - 3, y = anchorPos.y + 4, z = anchorPos.z}) or
func({x = anchorPos.x + 2, y = anchorPos.y + 5, z = anchorPos.z}) or func({x = anchorPos.x - 2, y = anchorPos.y + 5, z = anchorPos.z}) or
func({x = anchorPos.x + 1, y = anchorPos.y + 6, z = anchorPos.z}) or func({x = anchorPos.x - 1, y = anchorPos.y + 6, z = anchorPos.z}) or
func({x = anchorPos.x + 0, y = anchorPos.y + 6, z = anchorPos.z})
else
shortCircuited =
func({x = anchorPos.x, y = anchorPos.y + 0, z = anchorPos.z + 0}) or
func({x = anchorPos.x, y = anchorPos.y + 0, z = anchorPos.z + 1}) or func({x = anchorPos.x, y = anchorPos.y + 0, z = anchorPos.z - 1}) or
func({x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z + 2}) or func({x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z - 2}) or
func({x = anchorPos.x, y = anchorPos.y + 2, z = anchorPos.z + 3}) or func({x = anchorPos.x, y = anchorPos.y + 2, z = anchorPos.z - 3}) or
func({x = anchorPos.x, y = anchorPos.y + 3, z = anchorPos.z + 3}) or func({x = anchorPos.x, y = anchorPos.y + 3, z = anchorPos.z - 3}) or
func({x = anchorPos.x, y = anchorPos.y + 4, z = anchorPos.z + 3}) or func({x = anchorPos.x, y = anchorPos.y + 4, z = anchorPos.z - 3}) or
func({x = anchorPos.x, y = anchorPos.y + 5, z = anchorPos.z + 2}) or func({x = anchorPos.x, y = anchorPos.y + 5, z = anchorPos.z - 2}) or
func({x = anchorPos.x, y = anchorPos.y + 6, z = anchorPos.z + 1}) or func({x = anchorPos.x, y = anchorPos.y + 6, z = anchorPos.z - 1}) or
func({x = anchorPos.x, y = anchorPos.y + 6, z = anchorPos.z + 0})
end
return not shortCircuited
end,
-- returns true if function was applied to all wormhole nodes
apply_func_to_wormhole_nodes = function(anchorPos, orientation, func)
local xRange = 2
local zRange = 0
if orientation ~= 0 then
xRange = 0
zRange = 2
end
local xEdge, yEdge, zEdge
local pos = {}
for x = -xRange, xRange do
pos.x = anchorPos.x + x
xEdge = x == -xRange or x == xRange
for z = -zRange, zRange do
zEdge = z == -zRange or z == zRange
pos.z = anchorPos.z + z
for y = 1, 5 do
yEdge = y == 1 or y == 5
if not (yEdge and xEdge and zEdge) then
pos.y = anchorPos.y + y
if func(pos) then
-- func() caused an abort by returning true
return false
end
end
end
end
end
return true
end,
-- Check for whether the portal is blocked in, and if so then provide a safe way
-- on one side for the player to step out of the portal. Suggest including a roof
-- incase the portal was blocked with lava flowing from above.
-- If portal can appear in mid-air then can also check for that and add a platform.
disable_portal_trap = function(anchorPos, orientation)
assert(orientation, "no orientation passed")
-- Not implemented.
end,
schematic = {
size = {x = 7, y = 7, z = 7},
data = { -- note that data is upside down
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
__,__,AA,AA,AA,__,__,
__,__,AA,AA,AA,__,__,
__,__,AA,AA,AA,__,__,
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
__,AA,AA,AA,AA,AA,__,
AA,AA,AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,AA,AA,
__,AA,AA,AA,AA,AA,__,
__,__,AA,AA,AA,__,__,
__,__,OW,OW,OW,__,__,
__,ON,AA,AA,AA,ON2,__,
OU,AA,AA,AA,AA,AA,OD,
OU,AA,AA,AA,AA,AA,OD,
OU,AA,AA,AA,AA,AA,OD,
__,ON4,AA,AA,AA,ON3,__,
__,__,OE,OE,OE,__,__,
__,__,__,__,__,__,__,
__,AA,AA,AA,AA,AA,__,
AA,AA,AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,AA,AA,
__,AA,AA,AA,AA,AA,__,
__,__,AA,AA,AA,__,__,
__,__,__,__,__,__,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,AA,AA,AA,AA,AA,__,
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
__,__,AA,AA,AA,__,__,
__,__,AA,AA,AA,__,__,
__,__,AA,AA,AA,__,__,
__,__,__,__,__,__,__,
__,__,__,__,__,__,__,
},
facedirNodes = facedirNodeList
}
} -- End of PortalShape_Circular class
-- Example alternative PortalShape
-- This platform shape is symmetrical around the y-axis, so the orientation value never matters.
nether.PortalShape_Platform = {
name = "Platform",
size = vector.new(5, 2, 5), -- size of the portal, and not necessarily the size of the schematic,
-- which may clear area around the portal.
is_horizontal = true, -- whether the wormhole is a vertical or horizontal surface
diagram_image = {
image = "nether_book_diagram_platform.png", -- The diagram to be shown in the Book of Portals
width = 200,
height = 130
},
-- returns the coords for minetest.place_schematic() that will place the schematic on the anchorPos
get_schematicPos_from_anchorPos = function(anchorPos, orientation)
return {x = anchorPos.x - 2, y = anchorPos.y, z = anchorPos.z - 2}
end,
get_wormholePos_from_anchorPos = function(anchorPos, orientation)
-- wormholePos is the node above anchorPos
return {x = anchorPos.x, y = anchorPos.y + 1, z = anchorPos.z}
end,
get_anchorPos_from_wormholePos = function(wormholePos, orientation)
-- wormholePos is the node above anchorPos
return {x = wormholePos.x, y = wormholePos.y - 1, z = wormholePos.z}
end,
-- p1 and p2 are used to keep maps compatible with earlier versions of this mod.
-- p1 is the bottom/west/south corner of the portal, and p2 is the opposite corner, together
-- they define the bounding volume for the portal.
get_p1_and_p2_from_anchorPos = function(self, anchorPos, orientation)
assert(self ~= nil and self.name == nether.PortalShape_Platform.name, "Must pass self as first argument, or use shape:func() instead of shape.func()")
local p1 = {x = anchorPos.x - 2, y = anchorPos.y, z = anchorPos.z - 2}
local p2 = {x = anchorPos.x + 2, y = anchorPos.y + 1, z = anchorPos.z + 2}
return p1, p2
end,
get_anchorPos_and_orientation_from_p1_and_p2 = function(p1, p2)
return {x= p1.x + 2, y = p1.y, z = p1.z + 2}, 0
end,
apply_func_to_frame_nodes = function(anchorPos, orientation, func)
local shortCircuited
local yPlus1 = anchorPos.y + 1
-- use short-circuiting of boolean evaluation to allow func() to cause an abort by returning true
shortCircuited =
func({x = anchorPos.x - 2, y = yPlus1, z = anchorPos.z - 1}) or func({x = anchorPos.x + 2, y = yPlus1, z = anchorPos.z - 1}) or
func({x = anchorPos.x - 2, y = yPlus1, z = anchorPos.z }) or func({x = anchorPos.x + 2, y = yPlus1, z = anchorPos.z }) or
func({x = anchorPos.x - 2, y = yPlus1, z = anchorPos.z + 1}) or func({x = anchorPos.x + 2, y = yPlus1, z = anchorPos.z + 1}) or
func({x = anchorPos.x - 1, y = yPlus1, z = anchorPos.z - 2}) or func({x = anchorPos.x - 1, y = yPlus1, z = anchorPos.z + 2}) or
func({x = anchorPos.x , y = yPlus1, z = anchorPos.z - 2}) or func({x = anchorPos.x , y = yPlus1, z = anchorPos.z + 2}) or
func({x = anchorPos.x + 1, y = yPlus1, z = anchorPos.z - 2}) or func({x = anchorPos.x + 1, y = yPlus1, z = anchorPos.z + 2}) or
func({x = anchorPos.x - 1, y = anchorPos.y, z = anchorPos.z - 1}) or
func({x = anchorPos.x - 1, y = anchorPos.y, z = anchorPos.z }) or
func({x = anchorPos.x - 1, y = anchorPos.y, z = anchorPos.z + 1}) or
func({x = anchorPos.x , y = anchorPos.y, z = anchorPos.z - 1}) or
func({x = anchorPos.x , y = anchorPos.y, z = anchorPos.z }) or
func({x = anchorPos.x , y = anchorPos.y, z = anchorPos.z + 1}) or
func({x = anchorPos.x + 1, y = anchorPos.y, z = anchorPos.z - 1}) or
func({x = anchorPos.x + 1, y = anchorPos.y, z = anchorPos.z }) or
func({x = anchorPos.x + 1, y = anchorPos.y, z = anchorPos.z + 1})
return not shortCircuited
end,
-- returns true if function was applied to all wormhole nodes
apply_func_to_wormhole_nodes = function(anchorPos, orientation, func)
local shortCircuited
local yPlus1 = anchorPos.y + 1
-- use short-circuiting of boolean evaluation to allow func() to cause an abort by returning true
shortCircuited =
func({x = anchorPos.x - 1, y = yPlus1, z = anchorPos.z - 1}) or
func({x = anchorPos.x - 1, y = yPlus1, z = anchorPos.z }) or
func({x = anchorPos.x - 1, y = yPlus1, z = anchorPos.z + 1}) or
func({x = anchorPos.x , y = yPlus1, z = anchorPos.z - 1}) or
func({x = anchorPos.x , y = yPlus1, z = anchorPos.z }) or
func({x = anchorPos.x , y = yPlus1, z = anchorPos.z + 1}) or
func({x = anchorPos.x + 1, y = yPlus1, z = anchorPos.z - 1}) or
func({x = anchorPos.x + 1, y = yPlus1, z = anchorPos.z }) or
func({x = anchorPos.x + 1, y = yPlus1, z = anchorPos.z + 1})
return not shortCircuited
end,
-- Check for suffocation
disable_portal_trap = function(anchorPos, orientation)
-- Not implemented.
end,
schematic = {
size = {x = 5, y = 5, z = 5},
data = { -- note that data is upside down
__,__,__,__,__,
OU4,OW,OW,OW,OU3,
__,AA,AA,AA,__,
__,AA,AA,AA,__,
__,__,__,__,__,
__,OU4,OW,OU3,__,
ON,AA,AA,AA,OS,
AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,
__,AA,AA,AA,__,
__,ON,OD,OS,__,
ON,AA,AA,AA,OS,
AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,
__,AA,AA,AA,__,
__,OU,OE,OU2,__,
ON,AA,AA,AA,OS,
AA,AA,AA,AA,AA,
AA,AA,AA,AA,AA,
__,AA,AA,AA,__,
__,__,__,__,__,
OU,OE,OE,OE,OU2,
__,AA,AA,AA,__,
__,AA,AA,AA,__,
__,__,__,__,__,
},
facedirNodes = facedirNodeList
}
} -- End of PortalShape_Platform class
--====================================================--
--======== End of PortalShape implementations ========--
--====================================================--
-- Portal implementation functions --
-- =============================== --
local debugf = nether.debug
local ignition_item_name
local mod_storage = minetest.get_mod_storage()
local meseconsAvailable = minetest.get_modpath("mesecon") ~= nil and minetest.global_exists("mesecon")
local book_added_as_treasure = false
local function get_timerPos_from_p1_and_p2(p1, p2)
-- Pick a frame node for the portal's timer.
--
-- The timer event will need to know the portal definition, which can be determined by
-- what the portal frame is made from, so the timer node should be on the frame.
-- The timer event will also need to know its portal orientation, but unless someone
-- makes a cubic portal shape, orientation can be determined from p1 and p2 in the node's
-- metadata (frame nodes don't have orientation set in param2 like wormhole nodes do).
--
-- We shouldn't pick p1 or p2 as it's possible for two orthogonal portals to share
-- the same p1, etc. - or at least it was - there's code to try to stop that now.
--
-- I'll pick the bottom center node of the portal, since that works for rectangular portals
-- and if someone want to make a circular portal then that positon will still likely be part
-- of the frame.
return {
x = math.floor((p1.x + p2.x) / 2),
y = p1.y,
z = math.floor((p1.z + p2.z) / 2),
}
end
-- orientation is the yaw rotation degrees passed to place_schematic: 0, 90, 180, or 270
-- color is a value from 0 to 7 corresponding to the color of pixels in nether_portals_palette.png
-- portal_is_horizontal is a bool indicating whether the portal lies flat or stands vertically
local function get_colorfacedir_from_color_and_orientation(color, orientation, portal_is_horizontal)
assert(orientation, "no orientation passed")
local axis_direction, rotation
local dir = math.floor((orientation % 360) / 90 + 0.5)
-- if the portal is vertical then node axis direction will be +Y (up) and portal orientation
-- will set the node's rotation.
-- if the portal is horizontal then the node axis direction reflects the yaw orientation and
-- the node's rotation will be whatever's needed to keep the texture horizontal (either 0 or 1)
if portal_is_horizontal then
if dir == 0 then axis_direction = 1 end -- North
if dir == 1 then axis_direction = 3 end -- East
if dir == 2 then axis_direction = 2 end -- South
if dir == 3 then axis_direction = 4 end -- West
rotation = math.floor(axis_direction / 2); -- a rotation is only needed if axis_direction is east or west
else
axis_direction = 0 -- 0 is up, or +Y
rotation = dir
end
-- wormhole nodes have a paramtype2 of colorfacedir, which means the
-- high 3 bits are palette, followed by 3 direction bits and 2 rotation bits.
-- We set the palette bits and rotation
return rotation + axis_direction * 4 + color * 32
end
local function get_orientation_from_colorfacedir(param2)
local axis_direction = 0
-- Strip off the top 6 bits to leave the 2 rotation bits, unfortunately MT lua has no bitwise '&'
-- (high 3 bits are palette, followed by 3 direction bits then 2 rotation bits)
if param2 >= 128 then param2 = param2 - 128 end
if param2 >= 64 then param2 = param2 - 64 end
if param2 >= 32 then param2 = param2 - 32 end
if param2 >= 16 then param2 = param2 - 16; axis_direction = axis_direction + 4 end
if param2 >= 8 then param2 = param2 - 8; axis_direction = axis_direction + 2 end
if param2 >= 4 then param2 = param2 - 4; axis_direction = axis_direction + 1 end
-- if the portal is vertical then node axis direction will be +Y (up) and portal orientation
-- will set the node's rotation.
-- if the portal is horizontal then the node axis direction reflects the yaw orientation and
-- the node's rotation will be whatever's needed to keep the texture horizontal (either 0 or 1)
if axis_direction == 0 or axis_direction == 5 then
-- portal is vertical
return param2 * 90
else
if axis_direction == 1 then return 0 end
if axis_direction == 3 then return 90 end
if axis_direction == 2 then return 180 end
if axis_direction == 4 then return 270 end
end
end
-- We want wormhole nodes to only emit mesecon energy orthogonally to the
-- wormhole surface so that the wormhole will not send power to the frame,
-- this allows the portal frame to listen for mesecon energy from external switches/wires etc.
function get_mesecon_emission_rules_from_colorfacedir(param2)
local axis_direction = 0
-- Strip off the top 6 bits to leave the 2 rotation bits, unfortunately MT lua has no bitwise '&'
-- (high 3 bits are palette, followed by 3 direction bits then 2 rotation bits)
if param2 >= 128 then param2 = param2 - 128 end
if param2 >= 64 then param2 = param2 - 64 end
if param2 >= 32 then param2 = param2 - 32 end
if param2 >= 16 then param2 = param2 - 16; axis_direction = axis_direction + 4 end
if param2 >= 8 then param2 = param2 - 8; axis_direction = axis_direction + 2 end
if param2 >= 4 then param2 = param2 - 4; axis_direction = axis_direction + 1 end
-- if the portal is vertical then node axis_direction will be +Y (up) and node rotation
-- will reflect the portal's yaw orientation.
-- If the portal is horizontal then the node axis direction reflects the yaw orientation and
-- the node's rotation will be whatever's needed to keep the texture horizontal (either 0 or 1)
local rules
if axis_direction == 0 or axis_direction == 5 then
-- portal is vertical
rules = {{x = 0, y = 0, z = 1}, {x = 0, y = 0, z = -1}}
if param2 % 2 ~= 0 then
rules = mesecon.rotate_rules_right(rules)
end
else
-- portal is horizontal, only emit up
rules = {{x = 0, y = 1, z = 0}}
end
return rules
end
nether.get_mesecon_emission_rules_from_colorfacedir = get_mesecon_emission_rules_from_colorfacedir -- make the function available to nodes.lua
-- Combining frame_node_name, p1, and p2 will always be enough to uniquely identify a portal_definition
-- WITHOUT needing to inspect the world. register_portal() will enforce this.
-- This function does not require the portal to be in a loaded chunk.
-- Returns nil if no portal_definition matches the arguments
local function get_portal_definition(frame_node_name, p1, p2)
local size = vector.add(vector.subtract(p2, p1), 1)
local rotated_size = {x = size.z, y = size.y, z = size.x}
for _, portal_def in pairs(nether.registered_portals) do
if portal_def.frame_node_name == frame_node_name then
if vector.equals(size, portal_def.shape.size) or vector.equals(rotated_size, portal_def.shape.size) then
return portal_def
end
end
end
return nil
end
-- Returns a list of all portal_definitions with a frame made of frame_node_name.
-- Ideally no two portal types will be built from the same frame material so this call might be enough
-- to uniquely identify a portal_definition without needing to inspect the world, HOWEVER we shouldn't
-- cramp anyone's style and prohibit non-nether use of obsidian to make portals, so it returns a list.
-- If the list contains more than one item then routines like ignite_portal() will have to search twice
-- for a portal and take twice the CPU.
local function list_portal_definitions_for_frame_node(frame_node_name)
local result = {}
for _, portal_def in pairs(nether.registered_portals) do
if portal_def.frame_node_name == frame_node_name then table.insert(result, portal_def) end
end
return result
end
-- Add portal information to mod storage, so new portals may find existing portals near the target location.
-- Do this whenever a portal is created or changes its ignition state
local function store_portal_location_info(portal_name, anchorPos, orientation, ignited)
if not DEBUG_IGNORE_MODSTORAGE then
local key = minetest.pos_to_string(anchorPos) .. " is " .. portal_name
debugf("Adding/updating portal in mod_storage: " .. key)
mod_storage:set_string(
key,
minetest.serialize({orientation = orientation, active = ignited})
)
end
end
-- Remove portal information from mod storage.
-- Do this if a portal frame is destroyed such that it cannot be ignited anymore.
local function remove_portal_location_info(portal_name, anchorPos)
if not DEBUG_IGNORE_MODSTORAGE then
local key = minetest.pos_to_string(anchorPos) .. " is " .. portal_name
debugf("Removing portal from mod_storage: " .. key)
mod_storage:set_string(key, "")
end
end
-- Returns a table of the nearest portals to anchorPos indexed by distance, based on mod_storage
-- data.
-- Only portals in the same realm as the anchorPos will be returned, even if y_factor is 0.
-- WARNING: Portals are not checked, and inactive portals especially may have been damaged without
-- being removed from the mod_storage data. Check these portals still exist before using them, and
-- invoke remove_portal_location_info() on any found to no longer exist.
--
-- A y_factor of 0 means y does not affect the distance_limit, a y_factor of 1 means y is included,
-- and a y_factor of 2 would squash the search-sphere by a factor of 2 on the y-axis, etc.
-- Pass a nil or negative distance_limit to indicate no distance limit
local function list_closest_portals(portal_definition, anchorPos, distance_limit, y_factor)
local result = {}
if not DEBUG_IGNORE_MODSTORAGE then
local isRealm = portal_definition.is_within_realm(anchorPos)
if distance_limit == nil then distance_limit = -1 end
if y_factor == nil then y_factor = 1 end
for key, value in pairs(mod_storage:to_table().fields) do
local closingBrace = key:find(")", 6, true)
if closingBrace ~= nil then
local found_anchorPos = minetest.string_to_pos(key:sub(0, closingBrace))
if found_anchorPos ~= nil and portal_definition.is_within_realm(found_anchorPos) == isRealm then
local found_name = key:sub(closingBrace + 5)
if found_name == portal_definition.name then
local x = anchorPos.x - found_anchorPos.x
local y = anchorPos.y - found_anchorPos.y
local z = anchorPos.z - found_anchorPos.z
local distance = math.hypot(y * y_factor, math.hypot(x, z))
if distance <= distance_limit or distance_limit < 0 then
local info = minetest.deserialize(value) or {}
debugf("found %s listed at distance %.2f (within %.2f) from dest %s, found: %s orientation %s", found_name, distance, distance_limit, anchorPos, found_anchorPos, info.orientation)
info.anchorPos = found_anchorPos
info.distance = distance
result[distance] = info
end
end
end
end
end
end
return result
end
-- the timerNode is used to keep the metadata as that node already needs to be known any time a portal is stopped or run
-- see also ambient_sound_stop()
function ambient_sound_play(portal_definition, soundPos, timerNodeMeta)
if portal_definition.sounds.ambient ~= nil then
local soundLength = portal_definition.sounds.ambient.length
if soundLength == nil then soundLength = 3 end
local lastPlayed = timerNodeMeta:get_int("ambient_sound_last_played")
-- Using "os.time() % soundLength == 0" is lightweight but means delayed starts, so trying a stored lastPlayed
if os.time() >= lastPlayed + soundLength then
local soundHandle = minetest.sound_play(portal_definition.sounds.ambient, {pos = soundPos, max_hear_distance = 8})
if timerNodeMeta ~= nil then
timerNodeMeta:set_int("ambient_sound_handle", soundHandle)
timerNodeMeta:set_int("ambient_sound_last_played", os.time())
end
end
end
end
-- the timerNode is used to keep the metadata as that node already needs to be known any time a portal is stopped or run
-- see also ambient_sound_play()
function ambient_sound_stop(timerNodeMeta)
if timerNodeMeta ~= nil then
local soundHandle = timerNodeMeta:get_int("ambient_sound_handle")
minetest.sound_fade(soundHandle, -3, 0)
-- clear the metadata
timerNodeMeta:set_string("ambient_sound_handle", "")
timerNodeMeta:set_string("ambient_sound_last_played", "")
end
end
-- WARNING - this is invoked by on_destruct, so you can't assume there's an accesible node at pos
-- Returns true if a portal was found to extinguish
function extinguish_portal(pos, node_name, frame_was_destroyed)
-- mesecons seems to invoke action_off() 6 times every time you place a block?
debugf("extinguish_portal %s %s", pos, node_name)
local meta = minetest.get_meta(pos)
local p1 = minetest.string_to_pos(meta:get_string("p1"))
local p2 = minetest.string_to_pos(meta:get_string("p2"))
local target = minetest.string_to_pos(meta:get_string("target"))
if p1 == nil or p2 == nil then
debugf(" no active portal found to extinguish")
return false
end
local portal_definition = get_portal_definition(node_name, p1, p2)
if portal_definition == nil then
minetest.log("error", "extinguish_portal() invoked on " .. node_name .. " but no registered portal is constructed from " .. node_name)
return false -- no portal frames are made from this type of node
end
if portal_definition.sounds.extinguish ~= nil then
minetest.sound_play(portal_definition.sounds.extinguish, {pos = p1})
end
-- stop timer and ambient sound
local timerPos = get_timerPos_from_p1_and_p2(p1, p2)
minetest.get_node_timer(timerPos):stop()
ambient_sound_stop(minetest.get_meta(timerPos))
-- update the ignition state in the portal location info
local anchorPos, orientation = portal_definition.shape.get_anchorPos_and_orientation_from_p1_and_p2(p1, p2)
if frame_was_destroyed then
remove_portal_location_info(portal_definition.name, anchorPos)
else
store_portal_location_info(portal_definition.name, anchorPos, orientation, false)
end
local frame_node_name = portal_definition.frame_node_name
local wormhole_node_name = portal_definition.wormhole_node_name
for x = p1.x, p2.x do
for y = p1.y, p2.y do
for z = p1.z, p2.z do
local clearPos = {x = x, y = y, z = z}
local nn = minetest.get_node(clearPos).name
if nn == frame_node_name or nn == wormhole_node_name then
if nn == wormhole_node_name then
minetest.remove_node(clearPos)
if meseconsAvailable then mesecon.receptor_off(clearPos) end
end
local m = minetest.get_meta(clearPos)
m:set_string("p1", "")
m:set_string("p2", "")
m:set_string("target", "")
m:set_string("portal_type", "")
end
end
end
end
if target ~= nil then
debugf(" attempting to also extinguish target with wormholePos %s", target)
extinguish_portal(target, node_name)
end
if portal_definition.on_extinguish ~= nil then
portal_definition.on_extinguish(portal_definition, anchorPos, orientation)
end
return true