Animation blending (interpolation) problem

AamesxDavid · January 31, 2009, 3:18pm

So I’ve gone through the manual and reference about actors, and tried to make one animation go smoothly into another. There was another thread dealing with this, but it was using enableBlend, which the reference explains, then says not to use - and to use setBlend() instead. So that’s what I did. Combining this with the piece of code given by the other thread (which was never explained exactly what made it work), I got this:

  def move(self, task):

    global animState
    animState = animState
    if (self.keyMap["left"]!=0) and animState != 0:
      self.myChar.setBlend(frameBlend=1,blendType=1)
      interv = LerpAnimInterval(self.myChar, 0.75, "anim2", "anim1")
      #interv.start()
      self.myChar.loop("anim1")
      animState = 0
    if (self.keyMap["right"]!=0) and animState != 1:
      self.myChar.setBlend(frameBlend=1,blendType=1)
      interv = LerpAnimInterval(self.myChar, 0.75, "anim1", "anim2")
      #interv.start()
      self.myChar.loop("anim2")
      animState = 1
      
    return Task.cont

The LerpAnimInterval was used in the other thread, so I tried to implement it here. However, when I uncomment the interv.start() lines, all animation freezes.

Does anyone have interpolation working? Am I on the right track and simply missing a function, or is this done in a completely different way?

Thanks for your time yet again.

drwr · January 31, 2009, 7:17pm

From Actor.setBlend documentation:

    When animBlend is True, multiple different animations may
    simultaneously be playing on the Actor.  This means you may
    call play(), loop(), or pose() on multiple animations and have
    all of them contribute to the final pose each frame.

However, you didn’t set animBlend = True, you set frameBlend = True instead, which is different:

    The frameBlend flag is unrelated to playing multiple
    animations.  It controls whether the Actor smoothly
    interpolates between consecutive frames of its animation (when
    the flag is True) or holds each frame until the next one is
    ready (when the flag is False).

David

AamesxDavid · January 31, 2009, 8:41pm

Gah! I misunderstood the frameBlend definition. I didn’t want them to both be playing, I wanted them to transition smoothly. Naturally, this means having them both playing for a certain amount of time. So it (almost) all makes sense now, thanks!