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Activity Forums Maxon Cinema 4D Smoothing Transitions between Dynamic Simulations and Keyframes.

  • Smoothing Transitions between Dynamic Simulations and Keyframes.

    Posted by Don Lavender on March 28, 2023 at 9:09 pm

    Hello. I have a bottle cap that is animated with keyframes to start, then the bottle cap transitions to a dynamic simulation. The issue I’m running into is that when the keyframed dynamics go from off to on, it studders for just a frame.

    I feel this should be a common problem but am having issues finding support on this topic.

    Thank you so much for any help that’s provided.

    Dropbox link to phone recording of the animation.

    https://www.dropbox.com/s/mko36sw0lx2yzru/IMG_9385.MOV?dl=0

    Boston Cainfra replied 1 year, 2 months ago 2 Members · 1 Reply
  • 1 Reply
  • Boston Cainfra

    March 31, 2023 at 1:57 pm

    I see. Based on the video you shared, it seems that the stuttering issue you’re experiencing is due to the sudden change in animation from keyframed to dynamic simulation.

    When the dynamics are turned on, the simulation starts from scratch, and this can cause the stuttering effect you’re seeing.

    One way to address this issue is to use a transition period between the keyframed animation and the dynamic simulation. This will allow the simulation to smoothly transition from the keyframed animation and avoid any sudden changes that may cause stuttering.

    To do this, you can create a separate timeline track for the dynamic simulation and gradually increase the dynamics’ influence over time.

    This can be done by adjusting the keyframes of the dynamics’ settings, such as the mass, stiffness, and damping, to gradually increase their values over time. You can also adjust the timeline of the keyframed animation to overlap with the simulation timeline to create a smooth transition.

    Another approach you can try is to bake the keyframed animation into the dynamic simulation. This involves converting the keyframed animation into a cached simulation that can be used as a starting point for the dynamic simulation. This can help avoid sudden changes in the simulation and create a smoother transition.

    I hope this helps you address the stuttering issue you’re experiencing in your Cinema 4D animation. Let me know if you have any further questions or if there’s anything else I can assist you with.

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