Animation callback not always getting called (SOLVED)

Questions
1

I have the following code in which a person object receives a message to cross a bridge.

The person object’s current state is states.WALKING and the animation of their “y” property is used to show them walking up and then down a bridge.

The person object has a current velocity which combined with the time the animation takes to complete has them crossing the bridge just as they return to the second 0 value in the custom easing vector.

local function descend_bridge(self)
  self.state = states.WALKING
end

function on_message(self, message_id, message, sender)

  if message_id == hash("cross_bridge") then
	if self.state~=states.ON_BRIDGE then
		self.state = states.ON_BRIDGE
		local pos = go.get_position()
		local values = { 0, .2, .5, .7, .5, .2, 0 }
		local bridge_easing = vmath.vector(values)
		go.animate(".", "position.y", go.PLAYBACK_ONCE_FORWARD, pos.y+300, bridge_easing, 10, 0, descend_bridge)
	end
  end
end

This works most of the time, but sometimes the callback does not get called and the person’s state does not return to states.WALKING.

Normally I can see the person traverse the custom easing curve, but in the cases where the callback doesn’t work I can see them very quickly kind of bump up and down on the Y axis.

I’m not sure why this is happening, continuing to try and debug, but I thought I’d post this just in case I was doing something wrong.

Thanks,
Alex

2

I was having a similar problem a while ago. :slight_smile: I bet you have more than one animation running on “position”, which is why you get jumping values.

1 Like
3

Still testing, but I think you were right :slight_smile:

Thanks so much!

I had another animation running which gave the person a little bounce to their step on the y axis. So I added a

go.cancel_animations(".", "position.y")

Before starting the bridge crossing.
Cheers,
Alex

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