26 lines
970 B
Lua
26 lines
970 B
Lua
local wea = worldeditadditions
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local wea_c = worldeditadditions_core
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local Vector3 = wea_c.Vector3
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--- Returns a smooth gaussian brush.
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-- @param size Vector3 The target size of the brush. Note that the actual size of the brush will be different, as the gaussian function has some limitations.
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-- @param sigma=2 number The 'smoothness' of the brush. Higher values are more smooth.
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return function(size, sigma)
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size = math.min(size.x, size.y)
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if size % 2 == 0 then size = size - 1 end -- Gaussian runs on odd numbers
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if size < 1 then
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return false, "Error: Invalid brush size (brushes must be at least 1 node in size)."
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end
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local success, gaussian = wea.conv.kernel_gaussian(size, sigma)
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-- Normalise values to fill the range 0 - 1
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-- By default, wea.conv.kernel_gaussian values add up to 1 in total
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local max = wea_c.max(gaussian)
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for i=0,size*size-1 do
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gaussian[i] = gaussian[i] / max
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end
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return success, gaussian, Vector3.new(size, size, 0)
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end
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