Minetest-WorldEditAdditions/worldeditadditions/lib/sculpt/preview_brush.lua

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Lua
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local wea = worldeditadditions
local Vector3 = wea.Vector3
local make_brush = dofile(wea.modpath.."/lib/sculpt/make_brush.lua")
--- Generates a textual preview of a given brush.
-- @param brush_name string The name of the brush to create a preview for.
-- @param target_size Vector3 The target size of the brush to create. Default: (10, 10, 0).
-- @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.
local function preview_brush(brush_name, target_size, framed)
if framed == nil then framed = true end
if not target_size then target_size = Vector3.new(10, 10, 0) end
local success, brush, brush_size = make_brush(brush_name, target_size)
-- Values to map brush pixel values to.
-- Brush pixel values are first multiplied by 10 before comparing to these numbers
local values = {}
values["@"] = 9.5
values["#"] = 8
values["="] = 6
values[":"] = 5
values["-"] = 4
values["."] = 1
values[" "] = 0
local frame_vertical = "+"..string.rep("-", math.max(0, brush_size.x)).."+"
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local result = {}
if framed then table.insert(result, frame_vertical) end
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for y = brush_size.y-1, 0, -1 do
local row = {}
if framed then table.insert(row, "|") end
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for x = brush_size.x-1, 0, -1 do
local i = y*brush_size.x + x
local pixel = " "
local threshold_cur = -1
for value,threshold in pairs(values) do
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if brush[i] * 10 > threshold and threshold_cur < threshold then
pixel = value
threshold_cur = threshold
end
end
table.insert(row, pixel)
end
if framed then table.insert(row, "|") end
table.insert(result, table.concat(row))
end
if framed then table.insert(result, frame_vertical) end
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return true, table.concat(result, "\n")
end
return preview_brush