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Custom Tweener

TimBoTimBo Posts: 151
edited January 2016 in Carrara Discussion

While making the videos used in my other post "Best fps rate for use on YouTube" I can not come up with a tweener setting to equate a rocket sled ride.  On an Air Force plotting chart I noted the shape of the accel and decel curves created by the "Sonic Wind No. 1" rocket sled ride.  Col. Stapp was very brave or crazy. smiley  I have tried many different settings and have not yet found a single or combination of tweeners to even come close to an actual accel/decel plotting.  I am beginning to think it can't be done with Carrara's tweener.  Is there an external program or add-on whereby I can create a more complex tweener?

Sonic Wind 01.jpg
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Post edited by TimBo on

Comments

  • DartanbeckDartanbeck Posts: 21,534

    Yup. I've posted this in your other thread:

    Adjusting Amplitude, Timing and Scaling in the Graph Editor

    (new in Carrara 8.5)

  • DartanbeckDartanbeck Posts: 21,534

    It basically gives us full control on how tweens behave.

  • 3DAGE3DAGE Posts: 3,311

    Have you tried animating this as several seperate keyframed events inital excelleration,. full speed,. rapid deceleration

    have you tried using forces ?

    Carrara does physics,. you can use forces to push a "proxy" (low res "stand in" model ) along a track, or in a direction

    the strength of forces can be animated over time (engine on / engine off) .

    colliding with the water safety barrier iwould be a large negative force which rapidly deminishes.

     

  • TimBoTimBo Posts: 151
    3DAGE said:

    Have you tried animating this as several seperate keyframed events inital excelleration,. full speed,. rapid deceleration

    have you tried using forces ?

    Carrara does physics,. you can use forces to push a "proxy" (low res "stand in" model ) along a track, or in a direction

    the strength of forces can be animated over time (engine on / engine off) .

    colliding with the water safety barrier iwould be a large negative force which rapidly deminishes.

     

    I have several camera positions along the way and have some riding near the sled or pusher.  I have a couple close-up halfway cameras to watch the vehicle whiz by.  But I see what you are getting at.  No, I haven't cut out "prime" events from a rendering and assembled them to make a video.  Good point there.  The forces idea is something a bit above my head so no I have not tried that.

  • 3DAGE3DAGE Posts: 3,311

    Actually what i meant was,. animating the initial accelleration to full speed,.(bezier tweener) keyframe a section at a constant speed (linear tweener), then keyframe a scetion of a deceleration event (bezier tweener again),

    broken down into sections it's easier to deal with each part to get the overall animation you want

  • DartanbeckDartanbeck Posts: 21,534

    Huh... I was thinking that he did that and was looking to tweak the results. Right, we need to get some keys in there so that we have some tweeners to tweak! ;)

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