[SOLVED] Animation speed at a specified fps rate?

[Roland]

Guys. How do you tackle the 'frame' parameter in

void Animate( TEntity entity, flt frame, flt blend=1, int sequence=0, int recursive=1 ) 

 

I can get my animation done in what seems to be a correct speed by just setting that one to AppTime()/1000*fps, where fps desired animation speed in frames per second. But, to tell the truth I'm not sure what I'm doing there although it seems to work. fps set to 30 (same as my animation) gives something that looks ok.

 

How do you control that you get the desired animation speed in frames per second?

[Rick]

I increase my frames by my own timer logic.

 

off the top of my head something like below

if time > last_time + animation_speed then
  frame++
  last_time = time
end

[Roland]

Rick. Thats simple and simple is good. Thanks

[Clackdor]

That's very similar to what I do. And, yeah, it was based off of what Rick told me some time ago.

[Rick]

And mine was based off of what someone told me some time ago

[Roland]

Haha... Thats exactly what I'm going to say in a year if someone asks :-)

[Roland]

By the way I found that you have to take AppSpeed into the calculation to get the same results on different computers. This what I did and it seem to solve that problem quite nicely. At an FPS of 60 AppSpeed will be 1.0, at higher FPS as mine 1.200 FPS its about 0.04.

if( appTime > _lastTime )
{
   _lastTime = appTime;
   _frame += AppSpeed() ;
   if( _frame == _frames )
       _frame = 0;
}

[Clackdor]

By the way I found that you have to take AppSpeed into the calculation to get the same results on different computers. This what I did and it seem to solve that problem quite nicely. At an FPS of 60 AppSpeed will be 1.0, at higher FPS as mine 1.200 FPS its about 0.04.

if( appTime > _lastTime )
{
   _lastTime = appTime;
   _frame += AppSpeed() ;
   if( _frame == _frames )
       _frame = 0;
}

 

I have AppSpeed() plus an additional animationspeed variable so I can tweek how the animations look in code, as well.

 

Now, go blend animations. Whenever a new animation starts my code sets blend to 1.0 and counts it down over a period of 0.25 seconds. Looks very nice.

 

if (blend >= 0.0f) {
       blend = blend - AppSpeed()*0.0667f; }
   else { blend = 0.0f; }

   //Perform the animations

   Animate(mesh,frame2,blend,0,true);
   Animate(mesh,frame1,1.0f-blend,0,true);

[Roland]

Now things seems to work. Animation speed taking FPS into account and also can be tweak (as suggested above).

Blending in and out works. Great tips guys. Thanks

 

void Animation::Animate( Float appTime, const Animation::Blending& blending)
switch( blending )
{
//	no blending
case None:
	_blend = 1;
	break;

//	blend in
case In:
	_blend += _fadeIn*AppSpeed();
	_blend = std::min<Float>(_blend,1);
	break;

//	blend out
case Out:
	_blend -= _fadeOut*AppSpeed();
	_blend = std::max<Float>(_blend,0);
	break;

}
Update(appTime);
}

void Animation::Update( Float appTime )
{
//	time to update frame counter?
if( appTime > _lastTime )
{
	_lastTime = appTime;

	//	increment taking FPS rate into account
	_frame += AppSpeed() * _speed ;

	//	correction for under- and overflows
	_frame = std::max<Float>(0,_frame);
	_frame = std::min<Float>(_frame,static_cast<Float>(_frames));

	//	restart?
	if( _frame == _frames )
		_frame = 0;
}

//	don't bother about animations with blend values of 0
if( _blend > 0 )
	_model.Animate( _frame, _blend, _seq );

}