39 lines
1.1 KiB
Lua
39 lines
1.1 KiB
Lua
-- bong_tangent.lua: Tangent-based scheduler, concentrates at high noise
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scheduler = {
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name = "bong_tangent",
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display = "Tangent",
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description = "Front-loaded (structural focus)",
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}
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function schedule(output, num_steps, shift)
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local scale = 1.5
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for i = 0, num_steps - 1 do
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local frac = (i + 0.5) / num_steps
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local angle = frac * math.pi / 2.0
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local tan_val = math.tan(angle)
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output[i] = 1.0 - (2.0 / math.pi) * math.atan(tan_val * scale)
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end
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-- Sort descending
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local vals = {}
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for i = 0, num_steps - 1 do vals[i+1] = output[i] end
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table.sort(vals, function(a,b) return a > b end)
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for i = 0, num_steps - 1 do output[i] = vals[i+1] end
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clamp(output, num_steps)
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apply_shift(output, num_steps, shift)
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end
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function apply_shift(ts, n, shift)
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if shift == 1.0 then return end
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for i = 0, n - 1 do
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local t = ts[i]; ts[i] = shift * t / (1.0 + (shift - 1.0) * t)
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end
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end
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function clamp(ts, n)
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for i = 0, n - 1 do
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if ts[i] < 1e-6 then ts[i] = 1e-6 end
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if ts[i] > 1.0 then ts[i] = 1.0 end
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end
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end
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