Animation while input (solved)

Questions
1 
> function init(self)
> 	msg.post(".", "acquire_input_focus")
> 	self.vel = vmath.vector3()
> end
> 
> function update(self, dt)
> 	local pos = go.get_position()
> 	pos = pos + (self.vel * dt)
> 	go.set_position(pos)
> 	self.vel.x = 0
> end
> 
> function on_input(self, action_id, action)
> 	
> 	if action_id == hash("right") then
> 		self.vel.x= 150
> 		sprite.play_flipbook("#sprite", "walk")
> 	elseif action_id == hash("left") then
> 		self.vel.x= -150
> 		sprite.play_flipbook("#sprite", "walk")
> 	end
> 	if action_id == hash("right") and action.released then
> 		self.vel.x= 150
> 		sprite.play_flipbook("#sprite", "idle")
> 	elseif action_id == hash("left") and action. released then
> 		self.vel.x= -150
> 		sprite.play_flipbook("#sprite", "idle")
> 	end
> end

This is my code for my character moving. However. whenever I press right or left arrow, the character moves, but does not play “walk” flipbook animation. what is the error?

2

Hi! Welcome to the forum. Do you have a sprite called “sprite” in your game object? Do you have an animation called “walk” in your atlas?

1 Like
3

Thank you for the welcome!
Yes, I do. The idle animation plays after button is released, but walk animation does not play while button is being pressed and the character is moving.

4

The way you have it set up, the sprite will restart the “walk” animation every frame that the left or right keys are pressed. If you have your sprite set up correctly, it should work if you change it so that it only calls sprite.play_flipbook() when a key is pressed

2 Likes
5

It worked! I changed it to

function on_input(self, action_id, action)

	if action_id == hash("right") then
		self.vel.x= 150
	elseif action_id == hash("left")  then
		self.vel.x= -150
	end
	if action_id == hash("right") and action.pressed then
		sprite.play_flipbook("#sprite", "walk")
		self.right = true
		self.left = false
	elseif action_id == hash("left") and action.pressed then
		sprite.play_flipbook("#sprite", "walk")
		self.left= true
		self.right=false
	end
	if action_id == hash("right") and action.released then
		if self.left ~= true then
			sprite.play_flipbook("#sprite", "idle")
		end
	elseif action_id == hash("left") and action. released then
		if self.right ~= true then 
				sprite.play_flipbook("#sprite", "idle")
			end
	end
end

Thank you for the advice.

2 Likes
6

Here’s an example of how to deal with movement and animation states: https://github.com/britzl/publicexamples/blob/master/examples/top_down_movement/README.md

This tutorial also shows movement and animations: https://defold.com/tutorials/astronaut/

1 Like