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Add infrared noise
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@ -520,6 +520,7 @@ Algorithm | Description
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`sin` | A sine wave created with `math.sin()`.
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`sin` | A sine wave created with `math.sin()`.
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`white` | Random white noise.
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`white` | Random white noise.
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`red` | Red noise - has a lower frequency than white noise.
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`red` | Red noise - has a lower frequency than white noise.
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`infrared` | Even smoother than red noise. Tends to also be quite flat unless you use a slightly higher `apply` value (e.g. `20`).
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When specifying algorithm names, the `algorithm` parameter name is optional. For example, the following are both equivalent:
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When specifying algorithm names, the `algorithm` parameter name is optional. For example, the following are both equivalent:
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35
worldeditadditions/lib/noise/engines/infrared.lua
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35
worldeditadditions/lib/noise/engines/infrared.lua
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@ -0,0 +1,35 @@
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local wea = worldeditadditions
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local White = dofile(wea.modpath.."/lib/noise/engines/white.lua")
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local Infrared = {}
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Infrared.__index = Infrared
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function Infrared.new(seed)
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local result = {
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seed = seed or math.random(),
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white = White.new(seed),
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window = 2
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}
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setmetatable(result, Infrared)
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return result
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end
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function Infrared:noise( x, y, z )
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local values = { }
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for nx=x-self.window,x+self.window do
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for ny=y-self.window,y+self.window do
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for nz=z-self.window,z+self.window do
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table.insert(values, self.white:noise(nx, ny, nz))
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print("DEBUG nx", nx, "ny", ny, "nz", nz, "value", value)
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end
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end
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end
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for i,value in ipairs(values) do
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end
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return wea.average(values)
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end
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return Infrared
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@ -2,10 +2,11 @@ local wea = worldeditadditions
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return {
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return {
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available = { "perlin", "sin", "white", "red" },
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available = { "perlin", "sin", "white", "red", "infrared" },
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Perlin = dofile(wea.modpath.."/lib/noise/engines/perlin.lua"),
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Perlin = dofile(wea.modpath.."/lib/noise/engines/perlin.lua"),
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Sin = dofile(wea.modpath.."/lib/noise/engines/sin.lua"),
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Sin = dofile(wea.modpath.."/lib/noise/engines/sin.lua"),
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White = dofile(wea.modpath.."/lib/noise/engines/white.lua"),
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White = dofile(wea.modpath.."/lib/noise/engines/white.lua"),
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Red = dofile(wea.modpath.."/lib/noise/engines/red.lua")
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Red = dofile(wea.modpath.."/lib/noise/engines/red.lua"),
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Infrared = dofile(wea.modpath.."/lib/noise/engines/infrared.lua")
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-- TODO: Follow https://www.redblobgames.com/articles/noise/introduction.html and implement different colours of noise (*especially* red and pink noise)
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-- TODO: Follow https://www.redblobgames.com/articles/noise/introduction.html and implement different colours of noise (*especially* red and pink noise)
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}
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}
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@ -23,6 +23,8 @@ function worldeditadditions.noise.make_2d(size, start_pos, params)
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generator = wea.noise.engines.White.new()
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generator = wea.noise.engines.White.new()
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elseif layer.algorithm == "red" then
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elseif layer.algorithm == "red" then
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generator = wea.noise.engines.Red.new()
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generator = wea.noise.engines.Red.new()
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elseif layer.algorithm == "infrared" then
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generator = wea.noise.engines.Infrared.new()
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else -- We don't have any other generators just yet
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else -- We don't have any other generators just yet
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return false, "Error: Unknown noise algorithm '"..tostring(layer.algorithm).."' in layer "..layer_i.." of "..#params.." (available algorithms: "..table.concat(wea.noise.engines.available, ", ")..")."
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return false, "Error: Unknown noise algorithm '"..tostring(layer.algorithm).."' in layer "..layer_i.." of "..#params.." (available algorithms: "..table.concat(wea.noise.engines.available, ", ")..")."
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end
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end
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