Ball On A Treadmill Problem - Animation And Rigging

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Support Animation and Rigging Pavamvak (Panagiotis Vamvakas) July 12, 2021, 5:44pm 1 Hi, New to animation here! I want to create a simple track for a ball, but I have the following problem. The idea is that a hatch opens and a ball falls on a treadmill which is moving it to the next stage of the track. However what I get is this: New video

The treadmill is an array of cubes with a curve modifier. In order to spin it I move it along the x axis to the left. However it seems like that the ball is following the array of cubes along the x axis (ignoring the curve modifier) instead of following the treadmill’s rotation to the right. Does anyone know a way around it? The blend file is this: untitled.blend (2.6 MB) Thanks folks! Okidoki (Okidoki) July 15, 2021, 6:58am 2 i’m not sure because i’m not too much into simulation on animated objects yet, but i think the animation should be baked/applied (i do not clearly remember what’s the actual term here) first so that the simulation has a (not modifierer modified

) pure geometry so work on… Pavamvak (Panagiotis Vamvakas) July 15, 2021, 8:52am 3 You mean in the “Object” menu the option “Bake action” (Object → Animation → Bake Action…) ? If so, I already tried that. It bakes the animation (movement along the x axis) but since the modifier is not applied it still just moves the array of planes and does the same. Unless I understood something wrong in your suggestion, or there is something I’m missing. Okidoki (Okidoki) July 15, 2021, 11:47am 4 Basically yes… something in this direction…

digitvisions July 15, 2021, 1:35pm 5 Hi, go to edit mode and you will see the problem with the treadmill belt. see image:

untitled1440×855 177 KB Okidoki (Okidoki) July 15, 2021, 2:50pm 6 That was his problem:

However it seems like that the ball is following the array of cubes along the x axis (ignoring the curve modifier) instead of following the treadmill’s rotation to the right

so the question is : how to put the modifier into effect for the simulaton ?Anyway: i played around and if you switch direction of the bezier, rotate the treadmill in edit mode at 180’, and change keyframe x value -2.0152 to +2.0152 (reverse the animation), then you animation shows the same and if you disable the curve modifier in viewport the ball get stuck on the mill (no jumping at all) but if you enable it again the ball falls through the mill …

so i’m not so much into animation and even lesser i sumulation but maybe it gives you some ideas (no jumping is not what you want or i’m wrong???) Pavamvak (Panagiotis Vamvakas) July 15, 2021, 3:19pm 7 Could you send me the .blend file to see what you mean? Also the ball not jumping it’s ok I can fix that later by adjust the bounciness, but it is supposed to be a solid metal ball anyway so it’s ok if it’s not jumping. digitvisions July 15, 2021, 4:48pm 8 Try this tutorial could be useful: https://www.youtube.com/watch?v=ZDwxGPsfG6E Pavamvak (Panagiotis Vamvakas) July 15, 2021, 6:31pm 9 Thanks a lot!!! This is exactly what I needed, you’re a life saver! It seems that the problem was that I hadn’t apply the size and I also needed to check the box “Deforming” in the rigid body options. Thanks again!