Thanks. Very very good explanation.

This is the best way I could found, solved a big problem for me! Thank you sooooo much!

Thank you so much!! Just discovered your channel, awesome quality content! Love it

Your expression can be simplified. You're basically doing 2 / diameter but since diameter = 2 * radius the twos can cancel out. The simplified expression is -curve_length / radius * (eval_time / eval_max).

@lekkerfruit2208

2 жыл бұрын

what is the radius. I got the error F-Curve with path 'eval_time[0]' cannot be keyframed, ensure that it is not locked or sampled, and try removing F-Modifiers.

-2*curve_length/diameter*(eval_time/eval_max)

@abhicool153

Ай бұрын

thank you so much

thanks man!

I found this driver earlier but just couldn't make it work. It was a tiny but essential bit I missed, and you led me in the right direction. Have my gratitude & my sub!

Very nice Video. Thank you 🙏

For anyone trying to use a path and the calculate length isnt working go into edit mode, right click path and select set spline type to bezier, you may need to subdivide it.

Good Teaching and Good Explanation every Details

thanks bro best tut ever

Thanks for good lesson I got learned something

thank you!!

THANKS, Great Tutorial, my Brother, and cute cats you have there. 🙏🏾

Thank you very much for this nice tutorial. I also like your cat ❤

merci pour ce tuto. ça fonctionne bien ;)

Thank you very much. This helped me a lot in my university assignment. Although the accent was a bit hard to comprehend at times, it was clear and easy to follow. P.S. that cat behind you is absolutely adorable

@3Dschool-David

3 жыл бұрын

I didn't know my accent was that thick hahaha!

Thx.

I can't even find the Edit button at 7:43 on my blender

bigger balls , 'YEAHYEAH haha

This was exactly what I needed! Thanks! One question, afther you did all that can I still edit the curve at the end , like make it longer.. or do I need to update the curve length in the code again ?

@3Dschool-David

3 жыл бұрын

Yeah, just update the curve length and you are set.

I have found that a division of 25 as the eval_max makes the ball roll smoother on blender 4.0

How it works with circle curve?

Can you make the curves anything

Well presented, but of course, there is no subjectively "correct" way to roll a ball - the correct way is whatever works for your intended animation. But if you want to be anal about it, this is not the physically correct way to animate a rolling ball in any direction, because a ball does not steer itself around a path. There is no forward direction or orientation for a ball, it just changes its apparent rotation axis depending on the forces placed upon it, which is impossible to do in animation without using quaternions (or a physical simulation, which uses quaternions). I am surprised to see a "Curve Length" utility finally made its way into the interface. That is quite helpful.

F-Curve with path 'eval_time[0]' cannot be keyframed, ensure that it is not locked or sampled, and try removing F-Modifiers." help!

can i use this for a circle path?

@aliensoup2420

3 жыл бұрын

Yes a circle path will work.

When I click button to calculate curve lenght nothing changes :( If I make a new curve it can calculate it, but if I convert mesh to curve it cant. Any solutions? :(

why my ball is bouncing instead of peacefully rolling?

how did you get to the formula? Where does -2 come from? Halp!

@natasha4695

3 жыл бұрын

I managed to get it to work, but would still give you a cookie if you tell me about -2

@RobertShane

2 жыл бұрын

@@natasha4695 The 2 comes from the fact that he didn't simplify the expression. He's doing 2 / (radius * 2) which simplifies to 1/radius. The negative comes from him using a positive 100 at the end instead of a negative.

can't follow I'm distracted by the cute cat in the back

Thanks a lot I was able to make my music video with this video!! kzread.info/dash/bejne/iaeEyJShkq60oMY.html