onStart {
  @box = findBody("box")
}

onUpdate {
  point = @box.getOrigin
  # ERASE THE BOX FACE ON GREEN AXIS !
  vector = @box.getAxes.y

  ray = raytest(point, vector)

  if key('v') == 1
    target_body = findBodyByRaytest(ray)
    addImpulse(target_body, point, vector)
  end
}

onStart {
  @entity_1 = findEntityByIndex(0)
  @entity_2 = findEntityById(103)
  @entity_3 = findGroupByName("sphere")

  @layer_1 = findLayer(1)
  @layer_2 = findLayer("Physics joints")

  @body_1 = findBody("sphere")
  @body_2 = findBody(group_entity)
}

onUpdate {
  state = true if key('v') == 1

  visibility(@entity_1, state)
  visibility(@layer_1, state)
  visibility(@body_1, state)

OR

  @state = true if key('v') == 1
  @state = false if key('n') == 1

  visibility(@entity_1, @state)
  visibility(@layer_1, @state)
  visibility(@body_1, @state)
}

onUpdate {
  vis_layer_bool = true if key('v') == 1
  visibleLayer("Physics joints", vis_layer_bool)

  OR

  @vis_layer_bool = true if key('v') == 1
  @vis_layer_bool = false if key('n') == 1
  visibleLayer("Physics joints", @vis_layer_bool)
}

onStart {
  @body = findBody("sphere")
}

onUpdate {
  vis_body_bool = true if key('v') == 1
  visibleBody(@body, vis_body_bool)

  OR

  @vis_body_bool = true if key('v') == 1
  @vis_body_bool = false if key('n') == 1
  visibleBody(@body, @vis_body_bool)
}

#============================================================
# Version 1:  Background music
#============================================================
onUpdate {

  @channel_1 = playSoundPro(
    @channel_1,
    "background_music",
    camera.eye,  # Sound sources is camera centre point.
    5,
    frame == 1,  # Play music if simulation frame is 1.
    false,       # No stop.
    false,       # No channel reset.
    999          # Repeat.
  )
}

#============================================================
# Version 2:  Car horn.
#============================================================
onStart {
  @car = findBody("car")
}

onUpdate {
  if key('v') == 1
    play = true if @channel_horn == nil
  else
    stop = true
  end

  @channel_horn = playSoundPro(
    @channel_horn,
    "car_horn",
    @car.getCenter,
    4,
    play,
    stop
  )
}

#============================================================
# Version 3:  Play sound one by one.
#============================================================
onStart {
  @body = findBody("sphere")
}

onUpdate {
  play = true if key('v') == 1 and @channel_3 == nil

  @channel_3 = playSoundPro(
    @channel_3,
    "sound",
    @body.getCenter,
    4,
    play
  )
}

#============================================================
# Version 4:  Play sound with each key press.
#============================================================
onStart {
  @body = findBody("sphere")
}

onUpdate {
  if key('v') == 1
    play = true if @asdda == nil
    @asdda = true
  else
    @asdda = nil
  end

  @channel_4 = playSoundPro(
    @channel_4,
    "sound",
    @body.getCenter,
    5,
    play
  )
}

#============================================================
# Version 5:  Gun shot.
#============================================================
onStart {
  @gun = findBody("sphere")
}

onUpdate {
  play = true if key('v') == 1 and every(7)

  @channel_5 = playSoundPro(
    @channel_5,
    "gunShot_4",
    @gun.getCenter,
    5,
    play,
    false,       # No stop
    true         # Channel is nil, if 'play' no true.
  )
}

Note: If you use more gun shots, you can use this:
every(7,0) for 1 gun
every(7,1) for 2 gun
every(7,2) for 3 gun
etc ...
The second number should be less than the first!

onUpdate {
  @channel_1 = playSound("activation_1") if key('v') == 1 and @channel == nil

  # This resets the sound channel. Required to setSoundPosition/2/ !
  (@channel_1 = nil unless playing?(@channel_1)) if @channel_1

  (@channel_85 = nil unless playing?(@channel_85)) if @channel_85

  # etc....

  # Turn it On/Off the joints with sound.
  if @channel_1
    playing?(@channel_1) ? setVar('variable',1) : setVar('variable',0)
  end
}

onStart {
  maxChannels(30)
}

onUpdate {
  @channel_1 = playSound("activation_1") if key('v') == 1 and every(30)
  @channel_2 = playSound("activation_2") if key('n') == 1 and every(30,10)
}

onUpdate {
  physicsReset if key('v') == 1
}

onUpdate {
  if key('v') == 1
    timer = UI.start_timer(0.2, false) {
      UI.stop_timer(timer)
      physicsStart
    }
    physicsReset
  end
}

onStart {
  @entity_1 = getEntity(1)
  @body_1 = findBody(@entity_1)
OR
  @body_1 = findBody("sphere")
}

onUpdate {
  @body_1.setVelocity([0,1,0])
}

onStart {
  hiddenControllerPanel
}

onStart {
  @body_1 = findBody("sphere")
  @body_1.static = true
  @body_1.nocollision = true
}

onUpdate {
  up = 50 + oscillator(20)
  @body_1.setTransformation([0, 0, up])

  setVar("servo", oscillator(20))

  #Joints Controller: oscillator(20)
}

onUpdate {
  mouse = getMouseAxes

  setVar("motor", mouse.x)

  head_axes = setSphereAxes(mouse.x, mouse.y)
}

onStart {
  @body_1 = findBody("sphere")
  @body_1.static = true
  @body_1.nocollision = true
  @body_2 = findBody("box")
  @body_2.static = true
  @body_2.nocollision = true
}

onUpdate {
  head_axes = setSphereAxes(key('left')-key('right'), key('up')-key('down'))
  @body_1.setTransformation([0,0,50], head_axes.x, head_axes.y, head_axes.z)
  @body_2.setTransformation([40,0,50], head_axes.x, head_axes.y, head_axes.z)
}

onStart {
  @body_1 = findBody("sphere")
  @body_1.static = true
  @body_1.nocollision = true
}

onUpdate {
  @body_1.setTransformation(
    newPoint(0,0,50), newVector(1,0,0), newVector(0,1,0), newVector(0,0,1),
    90, newVector(0,0,1), newPoint(0,0,0),
    1, 1, 1
  )
}

onStart {
  @new = @current = [0,0,0]
  @newNum = @currentNum = 0
}

onUpdate {
  @new = [45, -21, 523] if key('v') == 1
  @new = [0, 57, -311] if key('n') == 1

  @current = transition(@new, @current, 10)
  # Now the @current is x,y,z array.

  @newNum = 185 if key('v') == 1
  @newNum = -21 if key('n') == 1

  @currentNum = transition(@newNum, @currentNum, 10, true)
  # Now the @currentNum is number.
}

onUpdate {
  getEntity(1).text = getFps.to_s
}

onStart {
  @body_1 = findBody("sphere")
}

onUpdate {
  point = @body_1.getCenter
}

onStart {
  @body_1 = findBody("sphere")
}

onUpdate {
  point = @body_1.getOrigin
}

onStart {
  @body_1 = findBody("sphere")
}

onUpdate {
  axes = @body_1.getAxes
}

onStart {
  @entity_1 = getEntity(1)
}

onUpdate {
  @entity_1.material = "red"
}

onStart {
  @layer_1 = getLayer(1)
}

onUpdate {
  @layer_1.visible = false
}

onStart {
  @body_1 = findBody("sphere")
}

onUpdate {
  axes = @body_1.visible = false
}

onStart {
  @body_1 = findBody("sphere")
  @body_1.static = true
  @body_1.nocollision = true
}

onUpdate {
  tra_1 = transformation_R(30, newVector(0,0,1))
  tra_2 = transformation_R(60, newVector(1,0,0))
  @body_1.conversion=(tra_1 * tra_2)
}