mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-11-23 23:53:44 +01:00
57 lines
1.8 KiB
Lua
57 lines
1.8 KiB
Lua
local wea = worldeditadditions
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local Vector3 = wea.Vector3
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local make_brush = dofile(wea.modpath.."/lib/sculpt/make_brush.lua")
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--- Generates a textual preview of a given brush.
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-- @param brush_name string The name of the brush to create a preview for.
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-- @param target_size Vector3 The target size of the brush to create. Default: (10, 10, 0).
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-- @returns bool,string If the operation was successful, true followed by a preview of the brush as a string. If the operation was not successful, false and an error message string is returned instead.
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local function preview_brush(brush_name, target_size, framed)
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if framed == nil then framed = true end
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if not target_size then target_size = Vector3.new(10, 10, 0) end
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local success, brush, brush_size = make_brush(brush_name, target_size)
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-- Values to map brush pixel values to.
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-- Brush pixel values are first multiplied by 10 before comparing to these numbers
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local values = {}
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values["@"] = 9.5
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values["#"] = 8
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values["="] = 6
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values[":"] = 5
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values["-"] = 4
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values["."] = 1
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values[" "] = 0
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local frame_vertical = "+"..string.rep("-", math.max(0, brush_size.x)).."+"
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local result = {}
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if framed then table.insert(result, frame_vertical) end
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for y = brush_size.y-1, 0, -1 do
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local row = {}
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if framed then table.insert(row, "|") end
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for x = brush_size.x-1, 0, -1 do
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local i = y*brush_size.x + x
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local pixel = " "
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local threshold_cur = -1
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for value,threshold in pairs(values) do
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if brush[i] * 10 > threshold and threshold_cur < threshold then
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pixel = value
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threshold_cur = threshold
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end
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end
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table.insert(row, pixel)
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end
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if framed then table.insert(row, "|") end
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table.insert(result, table.concat(row))
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end
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if framed then table.insert(result, frame_vertical) end
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return true, table.concat(result, "\n")
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end
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return preview_brush
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