Norns: sketches

[neauoire]

[beforeitwascool]

That’s so complex my head hurts, but i’ll dive into it!

[electret]

I built one of my favourite visual hello world in Norns

-- graph
--
-- graph sketch
-- key 2 adds node
-- key 3 removes node
-- enc 3 controls draw distance
--

local nodes = {}
local thresh = 30

function init()
  nodes = {
    _random_node(),
    _random_node(),
    _random_node(),
    }
end

function key(n,z)
  if n == 2 and z == 1 then
    -- add node
    table.insert(nodes, _random_node())
  end
  if n == 3 and z == 1 and #nodes > 0 then
    table.remove(nodes,1)
  end
end

function enc(n,d)
  if n==3 then
    -- clamp number of notes from 1 to 4
    thresh = math.min(128,(math.max(thresh + d,1)))
  end
  redraw()
end

function run()
  for i=1, #nodes do
    velocity = nodes[i].velocity
    
    nodes[i].location[1] = nodes[i].location[1] + velocity[1]
    nodes[i].location[2] = nodes[i].location[2] + velocity[2]
    
    x = nodes[i].location[1]
    y = nodes[i].location[2] 
    if (x < 0 or x > 128) then
      nodes[i].velocity[1] = nodes[i].velocity[1] * -1
    end
    
    if (y < 0 or y > 64) then
      nodes[i].velocity[2] = nodes[i].velocity[2] * -1
    end
  end
end
  
function redraw()
  screen.clear()
  screen.level(7)
  screen.aa(1)
  screen.line_width(1)
  
  for i=1, #nodes do
    -- draw
    for j=i, #nodes do
      x1 = nodes[i].location[1]
      y1 = nodes[i].location[2]
      x2 = nodes[j].location[1]
      y2 = nodes[j].location[2]
     if (_len(x1,y1,x2,y1) < thresh) then
        _line(x1,y1,x2,y2)
      end
    end
  end
  
    
  screen.update()
end

function update(sec)
  run()
  redraw()
end
  
function _random_node()
  return {
    location={math.random(128), math.random(64)},
    velocity={math.random(4) - 2, math.random(4) - 2}
  }
end

function _line(x1,y1,x2,y2)
  screen.move(x1,y1)
  screen.line(x2,y2)
  screen.close()
  screen.stroke()
end

function _len(x1,y1,x2,y2)
  return math.sqrt(
    math.pow(x2 - x1 ,2) +
    math.pow(y2 - y1 ,2)
    )
end

-- Interval

re = metro.init()
re.time = 1.0 / 15
re.event = function()
  update()
end
re:start()

[neauoire]

I was just messing around with soundplant, and it somehow feels so much like something I’d see on the norns.

about Soundplant