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

56 lines
1.4 KiB
Lua

local wea = worldeditadditions
local make_brush = dofile(wea.modpath.."/lib/sculpt/make_brush.lua")
---
-- @module worldeditadditions.sculpt
--- Generates a textual preview of a given brush.
-- @param brush table The brush in question to preview.
-- @param size Vector3 The size of the brush.
-- @returns string A preview of the brush as a string.
local function make_preview(brush, size, framed)
if framed == nil then framed = true end
-- 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, size.x)).."+"
local result = {}
if framed then table.insert(result, frame_vertical) end
for y = size.y-1, 0, -1 do
local row = {}
if framed then table.insert(row, "|") end
for x = size.x-1, 0, -1 do
local i = y*size.x + x
local pixel = " "
local threshold_cur = -1
for value,threshold in pairs(values) do
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
return table.concat(result, "\n")
end
return make_preview