mouse.lua

-- mouse
-- by @cfd90

MusicUtil = require "musicutil"
hs = require('awake/lib/halfsecond')

engine.name = "PolyPerc"

last_x = 4
last_y = 4

offset = 0
movement = 2
spread = 4

notes = MusicUtil.generate_scale_of_length(60, 1, 128)

function init()
  print(tab.print(notes))
  
  g = grid.connect()
  g.key = grid_key
  
  redraw_grid()
  
  params:add_separator()

  cs_AMP = controlspec.new(0,1,'lin',0,0.5,'')
  params:add{type="control",id="amp",controlspec=cs_AMP,
    action=function(x) engine.amp(x) end}

  cs_PW = controlspec.new(0,100,'lin',0,50,'%')
  params:add{type="control",id="pw",controlspec=cs_PW,
    action=function(x) engine.pw(x/100) end}

  cs_REL = controlspec.new(0.1,3.2,'lin',0,1.2,'s')
  params:add{type="control",id="release",controlspec=cs_REL,
    action=function(x) engine.release(x) end}

  cs_CUT = controlspec.new(50,5000,'exp',0,800,'hz')
  params:add{type="control",id="cutoff",controlspec=cs_CUT,
    action=function(x) engine.cutoff(x) end}

  cs_GAIN = controlspec.new(0,4,'lin',0,1,'')
  params:add{type="control",id="gain",controlspec=cs_GAIN,
    action=function(x) engine.gain(x) end}
  
  cs_PAN = controlspec.new(-1,1, 'lin',0,0,'')
  params:add{type="control",id="pan",controlspec=cs_PAN,
    action=function(x) engine.pan(x) end}
  
  hs.init()
end

function grid_key(x, y, z)
  if z == 0 then
    return
  end
  
  if last_x ~= x then
    print("Updating x to " .. x)
    last_x = x
    trigger_x(x)
  end
  
  if last_y ~= y then
    print("Updating y to " .. y)
    last_y = y
    trigger_y(y)
  end
  
  redraw_grid()
end

function redraw_grid()
  g:all(0)
  g:led(last_x, last_y, 15)
  g:refresh()
end

function trigger_x(x)
  engine.hz(MusicUtil.note_num_to_freq(notes[offset + x*movement - spread]))
  engine.hz(MusicUtil.note_num_to_freq(notes[offset + x*movement]))
  engine.hz(MusicUtil.note_num_to_freq(notes[offset + x*movement + spread]))
end

function trigger_y(y)
  engine.hz(MusicUtil.note_num_to_freq(notes[offset + y*movement]))
end