Stand Back Up! How to Reverse Ragdoll Physics (Unity Tutorial)
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- เผยแพร่เมื่อ 11 ต.ค. 2024
- In this Unity tutorial we're going to to look at how we can reverse ragdoll physics, and have the character stand back up again.
The project files are available to our patrons here:
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Want to follow along? This project is a good starting point
► / project-files-68074022
The final script can be found here
► dotnetfiddle.n...
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0:28 - Recap of ragdoll physics
1:03 - First attempt at reversing the ragdoll
2:57 - Understanding why it didn't work
3:38 - Realigning the zombie position
6:00 - Adding a stand up animation
11:05 - Transitioning to the stand up animation
20:30 - Improving the bone transitions
23:58 - Finishing touches
24:52 - Summary
#KetraGames #LearnUnity #UnityTutorials #UnityTips
If its still sliding and you've copy pasted the code from the link in the description, check your transform scales. Make everything 1,1,1. My armature object was scaled up. Lost a solid day of my life trying to figure that out. But got it now!
I watch a lot of tutorials. Most of them are very frustrating and lacking in one way or many. This tutorial is perfect.
Thanks so much for this comment, means a lot 😊
Underrated video, I haven't found any other video that explains the transitioning in detail, actually, I didn't find any video that transitions from ragdoll to animator. Thanks for making this.
Cool video! Minor point: Random.Range(5, 10) uses the integer version of random, which returns one of 5, 6, 7, 8 or 9, excluding 10. If you want any float number up to 10 just add an "f" to one of the numbers: Random.Range(5f, 10)
Thanks for pointing this out 😊
thats interesting, Ive been doing it wrong all this time, what a very odd choice to exclude the last number. And also very interesting how adding f makes it include it, thats a new trick for me thanks. Also means everything I randomised in my games is slightly off :)
@@TYNEPUNK ew that sucks about the randomization, I never thought about it that way. Yikes!
@@Massive-3D im not even sure that he was right actually.
@@TYNEPUNK well, if you read the docs, even the name of the second parameter is "maxInclusive" for float version and "maxExclusive" for intergers
Awesome i love ragdoll effects
Thanks 😊
Superb video, thanks for this. As someone who asked for it, I really appreciate you doing it. It would be great if you could do a video of a rag doll picking up another rag doll and throwing it.
Glad you liked the video 😊
thanks for asking!
This is absolutely amazing tutorial! I do really appreciate the narration over the code. Well, I would probably love to see additional basic "high-level" introduction to a problem and a generic explanation of a solution. But even what you have right now is so useful and well put together. Thank you, keep up the good work!
Thanks for your feedback 😊
Wonderful! I’ve long waited for this video to come out and here it is! Really appreciate it
Great! Thanks for this 😊
Super cool 😎!
I couldn't figure out how to get the bone state at the start of the Animation so I assumed you had to do a fully procedural animation to achieve the stand up effect! This is a great, pretty cheap way to get a good looking stand up effect!
Just projecting the stand up from face down... I guess you can do basically the same thing, but check the orientation of the hip (and maybe chest?) bone to see if it's facing world up or down. If they're on their chest, lerp to a the "get up from face down" animation, and if they're on their back, do the "get up from face up" animation that was just done here.
Looking forward to the next installment and I'll definitely refer others to this video. Well explained and much cheaper (and easier!) than a fully procedural animation! Thank you!
@LlamAcademy Thanks so much for this comment. Hopefully it can help some of your follower's "game dev dreams become a reality" 😊
You're exactly right regarding the stand up from face down. Once you work out which way the character is facing you can then select a different animation and follow the same process.
Loved the work you did on your AI series by the way. Keep up the good work😊
Thanks you! I was searching for a way to interpolate the dragdolls bones to the animation and this video has exactly what I wanted
One of the best Unity tutorials i've watched since 2016. Thank you very much for this
Thanks very much for this comment 😊
I have planned to create a zombie game in future. Definitely this video might help me for that. Thank you so much! Keep it up😊
Thanks for this comment 😊
Wow one of the best tutorials Ive found, thanks. I was trying to do this for 2 days!! Got the files from patreon, thanks!!
Thanks very much for your support 😊
@@KetraGames thanks for yours too, saved me a ton of nightmares!!
Great tutorial! The whole series has been amazing and every video you make well explained and to the point! Thank you!! Can't wait for the next topics you will cover!
I think I found an issue though. If you shoot the zombie while the Stand Up animation is playing and not finished, when it tries to get up again the animation will continue from the frame that it got interrupted (at least that's what was happening in my case)
I fixed it by writing at the ResettingBonesBehaviour function : _animator.Play(_standUpStateName, -1, 0f);
Great spot. Thanks for sharing the solution 😊
As for the flip, it looks ok, but of course you could simply check if it is facing down on its belly and use a get up from belly animation. That would be a quick fix. Very pro and awesome videos.
Thanks, yes that's exactly what you could do to fix the flip 👍
Nice video. I had a thing that used 3 different rigs for this, but this made it a little simpler. Just a note; In the method that gets the bone positions for the first frame, you pass in the array to store it in, but never use it.
Some of the best tutorials I have ever found
Thanks so much for this 😊
very good, this series is very well done!
Thanks for this 😊
Your tutorials have helped me tremendously. Thank you for these extremely well versed explanations.
Great to hear this, thank you 😊
Thanks for super clear explanation 👍This video found me just when I need it! Thanks Ketra!
Glad it was useful 😊
This is absolutely amazing tutorial!!! Thank you so much!
Thank you, your videos are very useful.
Great to hear, thanks 😊
Thank you!! Great and clear tutorial. Really appreciate the series.
Brilliant, thank you 😊
incredible tutorial! thx so much lady.
Thanks, glad you found it useful 😊
Great tutorial!
Awesome video!
Thanks for this comment 😊
Terrific and clear, thank you
Thanks for this comment 😊
Just got to this channel, amazing tutorials! I have a tutorial suggestion if you would like to make. Basically having a running 3D character doing a 180 fast rotation (like in a sport game) and fixing the orientation after that, as the transform remains the same but the last frame of the turn around animation would look in another direction, so if running anim will be played it will look back at 180 which is wrong. Without interpolation would be easy as you just need to snap transform at 180 deg after turn animation ends, but with interpolation it gets tricky and I think a lot of people got this issue at some point
Thanks for the suggestion. Added to the list 😊
Perfect , thanks
Thank you 😊
thank you!!!!
👍😊
ОГО круто придумано! Спасибо большое за видео урок!
I would like to show us the directions and rotationmatches with some paint application end examples of what each offert doest what to the transform and rotation
I've been running a similar setup and run into several problems where other components (mostly animation rigging setup) is broken because the constraints store their relative offsets vs the first frame of the game which has the characters in the sampled get up animation state. So to avoid any future problems best to reset the character to its original position after a SampleAnimation call if you're doing it in Awake().
Thanks for sharing 😊
It's very difficult, but very interesting!
maybe if its face down just use a face down animation, also when will you make a discord server?
Yes, a different animation would be needed for when it's face down. Then it's just a matter of choosing the right animation depending on how the character has fallen.
We'll probably look into a Discord Server at some point, but focusing time on the channel content at the moment 😊
@@KetraGames So I guess that when the zombie lands on a side, we'd also need a separate stand up animation for that, right?
@@PatrickNusbaum Yes, you could add stand up animations for the zombie on it's side if you want, or you may decide it looks acceptable flipping onto it's back or front when it's on it's side.
Was there ever a future video that covered how to handle different falling orientations? On it's back, on it's front etc? Watched the whole thing thinking that would be here D:
I was just curious if there was some clever way of implementing this. But to make do, I ended up just ray casting from my ragdolls hips, forward and backwards to check for anything in my "ground" layer mask and using that to determine if the ragdoll is face down or on its back. Works but feels kind of hacky. Definitely wouldn't use this approach with a more complex system with more than just "stand up from lying on back" and "stand up from facing down" animation states.
Hi, not yet but it's coming soon 😊
@Hummy rather than shooting a ray, you should be able to check the forward direction of the hips. Something like this - bool isFacingUp = _hipsBone.forward.y > 0;
@@KetraGames thanks for great tutorial. how soon will be the next ragdoll tutorial? Maybe you already know?
Hi, we're working on the next Ragdoll video at the moment so it should be out by next week 😊
I have a question I have Implemnt a ragdoll everything seem okay but after implementing Explosion force to character my character keep bouncing continuous to the floor what a fix suggestion please? I use mesh collider for my floor
Juice!
The transform of my npc isn't updating to the new position after becoming a ragdoll, as a result the character snaps back center of the test area rather than getting up from where it landed. Any idea what might cause this?
Everything was replicated to a T, I even tested the code from the description and that didn't seem to fix it either. I'm assuming it has something to do with the AlignHipToPosition method.
You solved it? I have the same problem D:
great tutorial! did you ever show how to fix when the enemy ragdolls face down?
Thanks. No, we've not published that video yet.
At 23:36 is the rotation for offset or the position should be? Why you should multiply the rotation in order to find the position offset? I still have a lot of sliding, also when added the animation to stand up from facing the terrain, it has a weird 180deg rotation. :/
Hi, the hip bone position we're using for the offset is the position of the hips if there was no rotation. Therefore we need to apply the rotation of the Zombie for the offset to be correct. For example, let's say that the hips are in position (0,0,1). If we then rotate the Zombie 90 degrees the hips will now be in the position by (1,0,0). Hope that makes some sense 😊
What if hipsbone when performing animation is negative? It means that It can't raycast to the floor and its getting problematic
Hey could you also show a tutorial where you create animation between a character and a object + character with another character. So something like The sims games, like hugging another character, picking up and reading a newspaper etc.
Great idea, thanks. We'll add it to the list 😊
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I have question on this series why we take hitPoint.y after fire Physice dot raycast am wondering we take hitPoint dot y cos this point will be some point on enemy why we take it to make sure here is on the ground
Hello Ketra, again terrific and astute presentation and much appreciated. Ketra we are running into an issue with your solution since our animated characters are exported from others, and this particular one we customized for Parkour there are really no per-bone collider. There is a master collider and that is it!
Any idea how to apply your process to such animated characters?
Thanx
Hi, have you tried the Ragdoll Wizard to generate the colliders and joints for each bone like in this video?
th-cam.com/video/KuMe6Iz8pFI/w-d-xo.html
I modified your code with a few lines , while your videos still remained valid, and I will post the code here:
th-cam.com/video/KuMe6Iz8pFI/w-d-xo.html
if you do not approve please delete, or write me and I will delete. Dara
Thanks for another wonderful tutorial. I have a problem, however. I get this error when doing ResettingBonesBehaviour(): "transform.localRotation assign attempt for 'mixamorig5:RightHandRing4' is not valid. Input rotation is { NaN, NaN, NaN, NaN }." What could be wrong?
Hi, I'm not sure why that might be happening. Have you compared your script with the final version here - dotnetfiddle.net/v7ieoM.
Also, check you have the state name and clip names correct in the Inspector. This needs to exactly match the spelling and case used in the Animator.
Hope that helps 😊
Hi! Did you ever solve? I'm running into the same problem :(
@@CarlosDTyrant No I did not
Try use Quaternion.Slerp instead of Quaternion.Lerp
@@miroslavmiroslavov6327 Did not help but anyway thank you for your response
Any more tutorials coming out soon??
Yes, we've got plenty of tutorials in the pipeline 😊 We're planning to do another in the ragdoll series soon
Good tutorial, was exactly what I was looking for. I'm having an issue currently, when the zombie resets it's bones it resets them to a T-pose instead of the "standup" animation. I think I might've missed a step in the earlier video, because I've combed through this one and double-checked the code. Would appreciate any help!
Hi, the only thing I can think of is that the clip name you supply via the Inspector possibly doesn't match the name of the "standup" animation?
@@KetraGames No that wasn't the problem unfortunately. Here's a video to help visualize the issue: th-cam.com/video/Fv9QPoOxQBk/w-d-xo.html
I've watched your other videos on root motion and such but I haven't been able to solve it. Maybe it's because the animator isn't enabled until after the bones have been lerped into the animation position? That would maybe explain why it goes back to the default t-pose. I'm stumped honestly.
Hi, it definitely looks like a problem when storing the bones of the animation. Somehow in this method
private void PopulateAnimationStartBoneTransforms(string clipName, BoneTransform[] boneTransforms)
{
Vector3 positionBeforeSampling = transform.position;
Quaternion rotationBeforeSampling = transform.rotation;
foreach (AnimationClip clip in _animator.runtimeAnimatorController.animationClips)
{
if (clip.name == clipName)
{
clip.SampleAnimation(gameObject, 0);
PopulateBoneTransforms(_standUpBoneTransforms);
break;
}
}
transform.position = positionBeforeSampling;
transform.rotation = rotationBeforeSampling;
}
it is getting the T Pose bone positions rather than the start of the animation. Could you try a different animation to see if that makes any difference? Or possibly sample a different frame - clip.SampleAnimation(gameObject, 1)?
If you haven't done so already, you can get the full script here to compare to yours - dotnetfiddle.net/v7ieoM
Hope that helps 😊
@@KetraGames I managed to solve it. I originally had a parent object for the character where only the script and nav mesh agent were stored, separate from the animator.
I thought I accounted for this in the code, as I was able to play animations and also get the correct name of the sampled clip, which I checked with " Print("" + clip.name); " in the animation clip bone storing method.
But when I removed the parent object, transferring the script and nav mesh agent to the same object that had the animator, then rewrote some of the code to account for this it worked perfectly.
Thanks for the help though! At first I was certain I missed a step somewhere due to my tendency to skip around tutorial videos, but it turned out to be my own decrepit way of making NPC's that was the root cause lol.
Glad you managed to fix it 😊
Pls can you make a video for shooting mechanism and aiming animation tutorials?
We'll add it to the list 😊
you are so fucking good. i have been searching this fucking shit for a long time. :*
😂 Thank you 😊
transform.localRotation assign attempt for 'mixamorig9:RightHandThumb3' is not valid. Input rotation is { NaN, NaN, NaN, NaN }.
UnityEngine.Transform:set_localRotation (UnityEngine.Quaternion)
zombie:resetBonesBehaviour () (at Assets/script/ragdoll.cs:190)
zombie:Update () (at Assets/script/ragdoll.cs:84)