Example of a very simple Echotron layer

main.coffee

# The Constructor/Class that is your layer needs
# to be assigned to module.exports in node.js style.
module.exports = class Example extends Echotron.Echo

  # Setup up the layer. Called for you when the
  # layer is created.
  initialize: ->

    # Make a mesh that is a simple cube.
    @mesh = new THREE.Mesh(
      new THREE.CubeGeometry(10, 10, 10)
      new THREE.MeshBasicMaterial()
    )

    # Add the cube mesh to the layer.
    @add @mesh

  # Called per frame, update the objects in the layer
  # however you want.
  update: (elapsed) ->

    # In this case, spin the cube on each axis at 1
    # radian per second.
    @mesh.rotation.x += elapsed
    @mesh.rotation.y += elapsed
    @mesh.rotation.z += elapsed

  # Called on every beat of the song.  Use it to change
  # state to show it reacting to the beat.
  onBeat: ->

    # In this case, set the cube to a random color
    @mesh.material.color = new THREE.Color().setRGB(
      Math.random(), Math.random(), Math.random()
    )