Playing Normal Animation Speed inside Game Loop

Blitz3D Forums/Blitz3D Programming/Playing Normal Animation Speed inside Game Loop

RustyKristi

(Posted 2015) [#1]

Hey guys,

I got a bit of a problem with my animation speeds. It seems that when I play a sequence, the speed is faster when the fps is higher even though I set it like this:

Animate robot,1,1 ;<-- default animation speed

How can I play it with normal speed as what is stored in the animation model/file which is normally 30fps?

RemiD

(Posted 2015) [#2]

Depending on the number of frames calculated and displayed per second, (maximum 60 with flip(1)), the speed of the turns, moves, animations will be different...

A way to prevent this : http://www.blitzbasic.com/codearcs/codearcs.php?code=2916

RustyKristi

(Posted 2015) [#3]

Thanks RemiD, I will look into that source.

Flanker

(Posted 2015) [#4]

UpdateWorld can take a parameter to adjust animation speed. Based on deltatime like in the example posted by RemiD it works very well.

Yasha

(Posted 2015) [#5]

This is the solution I always used for this:

Local renderTime = Floor(1000.0 / DrawRate), updateTime# = 1000.0 / UpdateRate
Local cTime = MilliSecs(), accum#

Global RenderTween# = 1.0

While Not KeyDown(1)		;Outermost main loop - rendering and all secondary/non-time-dependent functions
	accum = accum + (MilliSecs() - cTime)		;Accumulator for update loop
	cTime = MilliSecs()		;"Official" start of loop
	
	;[Block] Update loop (for render tweening) - all movement, input and update happens within this one
	While accum >= updateTime
		CaptureWorld
		
		;Detect input events here
		;Update UI here
		
		;Input logic here
		
		;Update movement (e.g. UpdateWorld) here
		
		accum = accum - updateTime
	Wend
	RenderTween = accum / updateTime
	
	RenderWorld RenderTween
	;Draw UI here
	
	If LimiterOn Then Delay (renderTime - (MilliSecs() - cTime)) - 1		;Free spare CPU time
	If VSync Then VWait
	Flip False
Wend

Translated from a classic game development article: http://gafferongames.com/game-physics/fix-your-timestep/

RustyKristi

(Posted 2015) [#6]

Thanks Yasha. I will check this out asap and hopefully it solves my timing problem.

RustyKristi

(Posted 2015) [#7]

@Flanker

Yes, looks like UpdateWorld is also one option that will work. Thanks.