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+--- Thread: Start animation from specific frame (/showthread.php?tid=4310)
Start animation from specific frame - Alex3d - 01-03-2022
Hello
How to start the animation from the specific frame?
I tried next:
assimpAnimationController.StopAnimation();
assimpAnimationController.GoToFrame(frame);
assimpAnimationController.StartAnimation();
// animation starts from first frame
But it always animates from the first frame
Pause/Resume also doesn't work as I wish
Thanks
RE: Start animation from specific frame - abenedik - 01-04-2022
Good question. Currently there is no easy way to do that.
But you can derive your own class from AssimpAnimationController and then override the GetFrameNumber to provide a custom frame number based on the animation time. This allows you to add an offset to the frame number. The following code shows an example:
Code:
public class MyAnimationController : AssimpAnimationController
{
public double FrameNumberOffset { get; set; }
public MyAnimationController(AssimpWpfImporter assimpWpfImporter)
: base(assimpWpfImporter)
{
}
public override double GetFrameNumber(double animationTimeInSeconds)
{
double frameNumber = base.GetFrameNumber(animationTimeInSeconds);
frameNumber = (frameNumber + FrameNumberOffset) % LastFrameNumber;
return frameNumber;
}
}
// then start animation by:
_assimpAnimationController.FrameNumberOffset = startFrameNumber;
_assimpAnimationController.StartAnimation();To provide an easier way to support that case in the future I have added an overload to the StartAnimation method that takes the start frame number as a parameter. This will be available in the next version.
RE: Start animation from specific frame - Alex3d - 01-04-2022
Thank you!
In general, it works, but if the animation has been paused, then you need to call the StopAnimation () method before StartAnimation ();
In another case, a frame will jump.
Code:
if (_assimpAnimationController.IsAnimationPaused)
{
// Have to stop for starting from required frame
_assimpAnimationController.StopAnimation();
Debug.WriteLine(_assimpAnimationController.CurrentFrameNumber);
Debug.WriteLine(AnimationSlider.Value);
_assimpAnimationController.FrameNumberOffset = AnimationSlider.Value;
}