Module:MOS genchain

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This module should not be invoked directly; use its corresponding template instead: Template:MOS genchain.

This module produces a table illustrating the generator chain for a MOS scale.

Introspection summary for Module:MOS genchain
Functions provided (1) Line Function Params 19 genchain (input_mos, num_gens)	Lua modules required (4) Variable Module Functions used mos Module:MOS new period_step_count bright_gen unison interval_add interval_mul tamnams Module:TAMNAMS dependency not used tip Module:Template input parse dependency not used yesno Module:Yesno dependency not used

No function descriptions were provided. The Lua code may have further information.

---

local mos = require("Module:MOS")
local tip = require("Module:Template input parse")
local tamnams = require("Module:TAMNAMS")
local yesno = require("Module:Yesno")
local p = {}

-- Global variables for cell colors
-- Colors are as follows:
-- - Orange and blue for small and large sizes, respectively
-- - Darker colors for altered scale degrees
-- - No color for period intervals
p.cell_color_none = "NONE"				-- For cells that don't have a color (default cell color applies)
p.cell_color_perfect_size = "NONE"		-- Only applies for periods, including the root and equave
p.cell_color_lg_altered_size = "#BDD7EE"
p.cell_color_large_size      = "#DDEBF7"
p.cell_color_small_size      = "#FCE4D6"
p.cell_color_sm_altered_size = "#F8CBAD"

function p.genchain(input_mos, num_gens)
	local input_mos = input_mos or mos.new(5,2)
	local num_gens = num_gens or (mos.period_step_count(input_mos) - 1)

	local bright_gen = mos.bright_gen(input_mos)
	local stacked_gens = mos.unison()
	local genchain = { mos.unison() }
	
	local abs_num_gens = math.abs(num_gens)
	local sign = num_gens > 0 and 1 or -1
	
	for i = 1, abs_num_gens do
		stacked_gens = mos.interval_add(stacked_gens, mos.interval_mul(bright_gen, sign))
		table.insert(genchain, stacked_gens)
	end
	
	return genchain
end


return p