[Unsolved]set_animation() running backwards?

[Termos]

I wonder if it is possible to run animation backwards, that is frame number decreases over time instead of increasing.
I've tried things like {x=10,y=1}, but it still runs forward and then wraps around.

[Eran]

You can set a negative animation frame speed, I just tried it out.
So

Code: Select all

object:set_animation({x = 1, y = 10}, -n)

[Termos]

You can set a negative animation frame speed, I just tried it out.

Tried that too, animation just did not run. I'll check again.

[Eran]

If you haven't got it working in the meantime, I suppose that either somewhere else your mod interferes with negative frame speeds or it's a change that's happened between the version that you use and the 5.1.0 dev version that I use.

I attached the mod I used to try this. When you start the game with it and press F7, you should see the player model play a death animation in reverse before you move or do anything. It is incompatible with player_api. The relevant code is in line 92 of init.lua

[Termos]

Almost got it to work.

It runs backwards sometimes, but it seems to exhibit undefined behavior, probably based on previous animation frame it sometimes skips to the last frame instantly. Also it seems to break normal forward animations which run after.

That is when frame_loop = false.
When it's looping it seems okay.

[Termos]

Done some more testing, think I can say what's wrong.

If an animation follows another animation with frame_speed of opposite sign, it skips directly to the last frame.
Affects only frame_loop=false animations.

Can't say if it's a bug, cause I'm not sure negative speeds were even intended, but it probably is.

One of the test setups:

Code: Select all

if mobkit.timer(self,2) then	-- runs every 2 secs
	if self.forth then
		self.object:set_animation({x=1,y=15},7,0,false)
		self.forth = false		
	else
		self.object:set_animation({x=15,y=1},-7,0,false)
		self.forth = true
	end
end

It is supposed to play alternating forth and back animations, instead, only the first one runs as expected, all the subsequent animations are skips to the last frame.
If both animations are the same sign all is good.

[runs]

Done some more testing, think I can say what's wrong.

If an animation follows another animation with frame_speed of opposite sign, it skips directly to the last frame.
Affects only frame_loop=false animations.

Can't say if it's a bug, cause I'm not sure negative speeds were even intended, but it probably is.

One of the test setups:

Code: Select all

if mobkit.timer(self,2) then	-- runs every 2 secs
	if self.forth then
		self.object:set_animation({x=1,y=15},7,0,false)
		self.forth = false		
	else
		self.object:set_animation({x=15,y=1},-7,0,false)
		self.forth = true
	end
end

It is supposed to play alternating forth and back animations, instead, only the first one runs as expected, all the subsequent animations are skips to the last frame.
If both animations are the same sign all is good.

So make a bug request.