From 9751876877764d8a4ddf46f19dc79f48b7aed860 Mon Sep 17 00:00:00 2001 From: Noodlemire Date: Thu, 2 Sep 2021 19:11:17 -0500 Subject: [PATCH] Fix smart_vector_table --- mods/smart_vector_table | 1 - mods/smart_vector_table/LICENSE.txt | 458 ++++++++++++++++++++++++++++ mods/smart_vector_table/README.md | 24 ++ mods/smart_vector_table/api.txt | 43 +++ mods/smart_vector_table/init.lua | 176 +++++++++++ mods/smart_vector_table/mod.conf | 2 + 6 files changed, 703 insertions(+), 1 deletion(-) delete mode 160000 mods/smart_vector_table create mode 100644 mods/smart_vector_table/LICENSE.txt create mode 100644 mods/smart_vector_table/README.md create mode 100644 mods/smart_vector_table/api.txt create mode 100644 mods/smart_vector_table/init.lua create mode 100644 mods/smart_vector_table/mod.conf diff --git a/mods/smart_vector_table b/mods/smart_vector_table deleted file mode 160000 index 2c9a438..0000000 --- a/mods/smart_vector_table +++ /dev/null @@ -1 +0,0 @@ -Subproject commit 2c9a438883d6810ffc73f92d98b54e7dfef098f3 diff --git a/mods/smart_vector_table/LICENSE.txt b/mods/smart_vector_table/LICENSE.txt new file mode 100644 index 0000000..e9ab0b3 --- /dev/null +++ b/mods/smart_vector_table/LICENSE.txt @@ -0,0 +1,458 @@ + GNU LESSER GENERAL PUBLIC LICENSE + Version 2.1, February 1999 + + Copyright (C) 1991, 1999 Free Software Foundation, Inc. + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + +[This is the first released version of the Lesser GPL. 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They're built to be able to handle a large quantity of indices at a time, with no regards to how close or far apart specific vectors are. See the provided api.txt for details about how you use them. + +------------------------------------------------------------------------------------------------------------- +Dependencies and Support +------------------------------------------------------------------------------------------------------------- +There are no dependencies for this mod, not even on Minetest itself. You can use it in any Lua-based program if you wish. + +------------------------------------------------------------------------------------------------------------- +License +------------------------------------------------------------------------------------------------------------- +The LGPL v2.1 License is used with this mod. See https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html or LICENSE.txt for more details. + +------------------------------------------------------------------------------------------------------------- +Installation +------------------------------------------------------------------------------------------------------------- +Download, unzip, and place within the usual minetest/current/mods folder, and it will behave in relation to the Minetest engine like any other mod. diff --git a/mods/smart_vector_table/api.txt b/mods/smart_vector_table/api.txt new file mode 100644 index 0000000..bdb86f7 --- /dev/null +++ b/mods/smart_vector_table/api.txt @@ -0,0 +1,43 @@ +Smart Vector Table [smart_vector_table] +Modding API Reference +============================================== + + + +[SmartVectorTable] + +A table that accepts 3D Vectors as indices in a relatively efficient manner. It's built to be able to handle a large quantity of indices at a time, with no regards to how close or far apart specific vectors are. + +Note that in this API, a "Vector" is always defined as a table in the specific format of {x = , y = , z = } + +### Constructor: + +* smart_vector_table.new() - Returns a fresh, blank SVT. + +### Fields: + +* .table - The actual table that the SVT object indexes with every operation, maintained in a specific order. + --Try to avoid directly interacting with this if you can, as any out-of-order vectors will break the whole SVT. + +### Functions: + +* .set(KeyVector, value) - Put a value into the table at the KeyVector's index. The value can be of any type. + +* .del(KeyVector) - Completely delete the contents at the KeyVector's index, as well as the KeyVector itself. + --This is NOT automatically called if you set() a value to 0, "", or even nil. Keep that in mind if you need to clear values often. + +* .get(KeyVector) - Returns whatever value was at the given KeyVector. + +* .getIndex(KeyVector) - Returns the numerical index that the given KeyVector currently belongs to. + --Be cautious of the index changing, which may happen if vectors are added or removed from the SVT. + +* .getVector(i) - Returns the KeyVector that was at the given numerical index. +* .getValue(i) - Returns the value that was the the given numerical index. +* .size() - Returns the number of indices that the SVT contains. + --Usually used when iterating through the table. + +* .add(KeyVector, value) - If data already exists at KeyVector, this will attempt to add the new value to it, rather than replacing it like set(). + --It's usually a bad idea to use this with non-numerical values. + +* .combineWith(SmartVectorTable) - Attempts to add all contents of the provided SVT into the SVT that called the function. + --It's usually a bad idea to use this with non-numerical values. diff --git a/mods/smart_vector_table/init.lua b/mods/smart_vector_table/init.lua new file mode 100644 index 0000000..dfad226 --- /dev/null +++ b/mods/smart_vector_table/init.lua @@ -0,0 +1,176 @@ +--[[ +Smart Vector Table +Copyright (C) 2019-2021 Noodlemire + +This library is free software; you can redistribute it and/or +modify it under the terms of the GNU Lesser General Public +License as published by the Free Software Foundation; either +version 2.1 of the License, or (at your option) any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with this library; if not, write to the Free Software +Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA +--]] + +smart_vector_table = {} + +local vector_equals = vector and vector.equals or function(a, b) + return a.x == b.x and a.y == b.y and a.z == b.z +end + +local function lessThan(a, b) + if a.x < b.x then + return true + elseif a.x == b.x then + if a.y < b.y then + return true + elseif a.y == b.y then + if a.z < b.z then + return true + end + end + end + + return false +end + +local function binaryInsert(svt, obj, left, right) + left = left or 1 + right = right or svt.size() + + if left <= right then + local mid = math.floor((left + right) / 2) + local midv = svt.getVector(mid) + + if vector_equals(obj.k, midv) then + svt.table[mid] = obj + elseif lessThan(obj.k, midv) then + return binaryInsert(svt, obj, left, mid - 1) + else + return binaryInsert(svt, obj, mid + 1, right) + end + else + left = math.min(left, svt.size()) + if lessThan(svt.getVector(left), obj.k) then + left = left + 1 + end + + table.insert(svt.table, left, obj) + end +end + +function smart_vector_table.new() + local svt = {} + + svt.table = {} + + svt.set = function(keyVect, value) + if svt.size() > 0 then + local index = svt.getIndex(keyVect) + + if index then + svt.table[index].v = value + return + end + end + + local obj = {k = keyVect, v = value} + + if svt.size() == 0 then + svt.table[1] = obj + elseif svt.size() == 1 then + if lessThan(obj.k, svt.getVector(1)) then + table.insert(svt.table, 1, obj) + else + svt.table[2] = obj + end + else + binaryInsert(svt, obj) + end + end + + svt.del = function(keyVect) + table.remove(svt.table, svt.getIndex(keyVect)) + end + + svt.get = function(keyVect, left, right) + left = left or 1 + right = right or svt.size() + + if left <= right then + local mid = math.floor((left + right) / 2) + local midv = svt.getVector(mid) + + if vector_equals(keyVect, midv) then + return svt.getValue(mid) + elseif lessThan(keyVect, midv) then + return svt.get(keyVect, left, mid - 1) + else + return svt.get(keyVect, mid + 1, right) + end + end + end + + svt.getIndex = function(keyVect, left, right) + left = left or 1 + right = right or svt.size() + + if left <= right then + local mid = math.floor((left + right) / 2) + local midv = svt.getVector(mid) + + if vector_equals(keyVect, midv) then + return mid + elseif lessThan(keyVect, midv) then + return svt.getIndex(keyVect, left, mid - 1) + else + return svt.getIndex(keyVect, mid + 1, right) + end + end + end + + svt.getVector = function(i) + if not svt.table[i] then return end + return svt.table[i].k + end + + svt.getValue = function(i) + if not svt.table[i] then return end + return svt.table[i].v + end + + svt.size = function() + return #svt.table + end + + svt.add = function(keyVect, value) + local old = svt.get(keyVect) or 0 + svt.set(keyVect, old + value) + end + + svt.combineWith = function(other) + for i = 1, other.size() do + local k = other.getVector(i) + local v = other.getValue(i) + + local old = svt.get(k) or 0 + + svt.set(k, old + v) + end + end + + return setmetatable({}, { + __index = svt, + + __newindex = function() + error("You cannot directly modify values in a SmartVectorTable. Please use the existing functions instead.") + end, + + __metatable = false + }) +end diff --git a/mods/smart_vector_table/mod.conf b/mods/smart_vector_table/mod.conf new file mode 100644 index 0000000..05856c1 --- /dev/null +++ b/mods/smart_vector_table/mod.conf @@ -0,0 +1,2 @@ +name = smart_vector_table +description = API that adds a way to create tables indexed by 3D Vectors.