Module:ET: Difference between revisions
math.nan might be better Tag: Reverted |
Tag: Undo |
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| Line 64: | Line 64: | ||
function p.backslash_ratio(et, steps) | function p.backslash_ratio(et, steps) | ||
if et.size == 0 then | if et.size == 0 then | ||
return | return nil | ||
end | end | ||
return rat.as_float(et.equave) ^ (steps / et.size) | return rat.as_float(et.equave) ^ (steps / et.size) | ||
| Line 71: | Line 71: | ||
function p.backslash_display(et, steps) | function p.backslash_display(et, steps) | ||
if et.size == 0 then | if et.size == 0 then | ||
return | return nil | ||
end | end | ||
return steps .. p.backslash_modifier(et) | return steps .. p.backslash_modifier(et) | ||
| Line 86: | Line 86: | ||
function p.cents(et, steps) | function p.cents(et, steps) | ||
if et.size == 0 then | if et.size == 0 then | ||
return | return nil | ||
end | end | ||
steps = steps or 1 | steps = steps or 1 | ||
| Line 95: | Line 95: | ||
function p.hekts(et, steps) | function p.hekts(et, steps) | ||
if et.size == 0 then | if et.size == 0 then | ||
return | return nil | ||
end | end | ||
steps = steps or 1 | steps = steps or 1 | ||
| Line 107: | Line 107: | ||
towards = towards or 0 | towards = towards or 0 | ||
if et.size == 0 then | if et.size == 0 then | ||
return | return nil | ||
end | end | ||
local exact = math.log(ratio) / math.log(rat.as_float(et.equave)) * et.size | local exact = math.log(ratio) / math.log(rat.as_float(et.equave)) * et.size | ||