mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-09-12 08:08:30 +02:00
49 lines
1.3 KiB
Lua
49 lines
1.3 KiB
Lua
local wea = worldeditadditions
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local Vector3 = wea.Vector3
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--- Parses a static brush definition.
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-- @param source string The source string that contains the static brush, formatted as TSV.
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-- @returns true,table,Vector3|false,string A success boolean, followed either by an error message as a string or the brush (as a table) and it's size (as an X/Y Vector3)
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return function(source)
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local width = -1
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local height
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local maxvalue, minvalue, range
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-- Parse out the TSV into a table of tables, while also parsing values as numbers
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-- Also keeps track of the maximum/minimum values found for rescaling later.
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local values = wea.table.map(
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wea.split(source, "\n", false),
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function(line)
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local row = wea.split(line, "%s+", false)
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width = math.max(width, #row)
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return wea.table.map(
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row,
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function(pixel)
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local value = tonumber(pixel)
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if not value then value = 0 end
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if maxvalue == nil or value > maxvalue then
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maxvalue = value
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end
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if minvalue == nil or value < minvalue then
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minvalue = value
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end
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return value
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end
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)
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end
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)
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height = #values
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range = maxvalue - minvalue
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local brush = {}
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for y,row in ipairs(values) do
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for x,value in ipairs(row) do
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local i = (y-1)*width + (x-1)
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brush[i] = (value - minvalue) / range
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end
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end
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return true, brush, Vector3.new(width, height, 0)
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end
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