gistfile1.coffee

class THREE.BoneHelper extends THREE.Object3D
  constructor: (@bone, @size) ->
    super()
    @size ?= 1

    cubeGeometry = new THREE.CubeGeometry(@size, @size, @size)
    cubeMaterial = new THREE.MeshBasicMaterial()
    @cube = new THREE.Mesh(cubeGeometry, cubeMaterial)
    @cube.matrixAutoUpdate = false

    @add(@cube)
    @update()

  update: =>
    @cube.matrix.copy(@bone.skinMatrix)

    @remove(@line) if @line?

    if @bone.parent instanceof THREE.Bone
      lineMaterial = new THREE.LineBasicMaterial()
      lineGeometry = new THREE.Geometry()
      lineGeometry.vertices.push(new THREE.Vector3().getPositionFromMatrix(@bone.skinMatrix))
      lineGeometry.vertices.push(new THREE.Vector3().getPositionFromMatrix(@bone.parent.skinMatrix))
      @line = new THREE.Line(lineGeometry, lineMaterial)
      @add(@line)