how do I throttle the speed

posted to: Rolling Ball

HI Wayne

thank you for your response. I am now facing the issue with lowering the speed between the first two frames on the X Axis. I am too fast in the middle and it slows down too fast which makes it look unrealistic. It seems to have become a constant problem now.

When I set up the first two frames (exactly) like you it should come out the same way, right?  But mine is way too fast. And you did not change the handles to slow it down.... you just set a start and an end frame.

do you happen to have this animation with a motion path.... ?


https://youtu.be/6ZNhOGmzmdU

https://youtu.be/GdbpFBDIhdI



  • Adrian Bellworthy replied

    Hey mastart,

    The first video looks pretty good to me.

    The speed may look too fast at the moment without the rotation. Work on the rotation next and take another look at the speed.

    If it is still too fast, increase the number of frames during the roll, move the last keyframes, including the settle until your happy.

    1 love
  • Wayne Dixon replied

    Hey Martin - I made you a little demo
    Hopefully it helps.

    https://www.dropbox.com/s/6yxyzuvo5ivz9ih/martin-curve-demo.mp4?dl=0


    1 love
  • mastart replied

    Thank you very much Wayne, this actually helped me a lot. I think at the end of the day it is the time spending with animation and training the eye and knowing how to "tweak" the handles and put them in the right place and position. I actually started with two to three animations and breaks in between just to relax  my eyes and give them something else to see then just them same motion over again.

    thank you so far, can't wait for your next courses and learning from you.


  • mastart replied

    @Wayne Dixon


    https://www.dropbox.com/s/d4pvbxmg1hrklyc/2022-06-01%2010-25-11.mkv?dl=0

    https://www.dropbox.com/s/fqw7yd106iflxj7/2022-06-01%2014-45-46.mkv?dl=0

  • Wayne Dixon replied

    Hey Martin.

    In your case it will be best to move both the last keyframes (on the spin) together.

    Now let's have a think about what the curves actually mean (well the Green curve)
    It shows the change in value over time.

    So reading it from left to right - it is going downwards, becomes less steep, and then changes direction and slows into the next keyframe (back up)
    That means it is rotating one direction, slows down to a stop, and then starts rotating the other direction and slows down to a stop.

    So your rotation curve is actually generally doing the right thing.  The tricky part is making it do the right amount of that thing at the right time.

    Your translation looks pretty good - so the next trick is to make the spin curve stop and change direction at the same time the translation does those things. 

    The part after that is harder - you need to make it spin the right amount of distance to those spots.

    If there is too much spin (ball is doing a burn out) you need to reduce the vertical height difference between your keyframes.

    If the ball is sliding (under rotation) you need to increase the vertical height difference between your keyframes. 


    The last part is the super hard part of this exercise but it's actually what it's all about.

    It's an exercise to train your eye (and to practice controlling things in the Graph Editor)

    You will never have to do this in 'the real world' - but if you strengthen your eye, everything else in animation becomes easier.


    Hope that helps.

    1 love
  • mastart replied

    Thank you, that helps....