mirror of
https://github.com/kepler155c/opus
synced 2025-10-31 15:43:00 +00:00
58 lines
1.1 KiB
Lua
58 lines
1.1 KiB
Lua
-- Various utilities for Jumper top-level modules
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if (...) then
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-- Dependencies
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local _PATH = (...):gsub('%.utils$','')
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local Path = require (_PATH .. '.path')
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-- Local references
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local pairs = pairs
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local t_insert = table.insert
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-- Raw array items count
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local function arraySize(t)
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local count = 0
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for _ in pairs(t) do
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count = count+1
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end
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return count
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end
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-- Extract a path from a given start/end position
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local function traceBackPath(finder, node, startNode)
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local path = Path:new()
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path._grid = finder._grid
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while true do
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if node._parent then
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t_insert(path._nodes,1,node)
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node = node._parent
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else
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t_insert(path._nodes,1,startNode)
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return path
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end
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end
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end
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-- Lookup for value in a table
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local indexOf = function(t,v)
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for i = 1,#t do
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if t[i] == v then return i end
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end
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return nil
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end
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-- Is i out of range
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local function outOfRange(i,low,up)
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return (i< low or i > up)
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end
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return {
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arraySize = arraySize,
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indexOf = indexOf,
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outOfRange = outOfRange,
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traceBackPath = traceBackPath
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}
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end
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