Unity 3D - Generic Inverse Kinematics (IK) - Open Source - Github

A Generic Inverse Kinematics (IK) plugin for Unity 3D which works with all types of rig structures.
This is because it doesn't rely on the hierarchy of the bone structure.
Plugin itself is very lightweight and can be easily controlled from the inspector.
Trick is to apply this script on every IK object you need and create separate chains to give more control over each chain.
My GitHub also has an Interpolator script that helps me give these IK transforms smooth animations quickly. Its a fairly easy plugin so I wont make a video on that. So just check that out too on GitHub.
UPDATE : Lengths are now calculated automatically.
UPDATE : Added a reset hierarchy button to undo changes done by plugin.
Here is the GitHub link:
github.com/kit...
#Unity3D #FreePlugins
Write in comments section if you find any bugs..
Or you are always welcomed to submit contribution request on github.
License is : Do whatever you want

[@sids3194]

ok for guys confused about how to makes the bones.youll need blender. 1]make cuboids you need and set their scale to 1 , so that when you import those cuboids to unity, their scale under transforms will be 1 1 1 2]change the pivot point to the top of the bone in blender and then make sure the same is reflected in unity by toggling to pivot view from center view 3]create an empty transform and place it at the end of the last bone

[@acinaces343]

should you parent a bone to the bone above it like you would normally?

[@acinaces343]

nvm figured it out!

[@GymCritical]

The worse part is, they could’ve googled and found that answer. I did.

[@samdavidpaul]

woooow..Awesome...keep doing what you are doing.You did it open source and that is an amazing thing.Thank you for that.

[@timolsen2640]

this is a God send. thankyou

[@castlecodersltd]

A great introduction. Thanks ☺

[@sinasinaie5745]

Thanks for the video! How would you go about limiting the relative rotations at the joints. For example, to not allow the angle between top and mid bones to go above 120 degrees?

[@nishadtardalkar8737]

Oooo didn't think of that.. I'll try to get that done as well.. I think we'll need the relative rotations between bones and then set a max and min cap.

[@Tdddy]

Thanks I subscribed man! I like the simple solutions you are offering. If I use them in any of my concepts I’ll let you see!

[@nishadtardalkar8737]

I'd love to see your work.

[@Tdddy]

@@nishadtardalkar8737 Thanks, haha. I played with the solver, but couldn't get it to give the same results as the video. Is there something I'm overlooking that maybe wasnt stated in the video? at the moment my GO's are just flying all over the place when target is adjusted.

[@Tdddy]

let me reiterate. It is working, but the bones arent connecting to one another, more so just rotating around their center. Should i configure joints to them?

[@nishadtardalkar8737]

Tddy Bones need pivot on their base just like we have in 3d modelling softwares. Maybe your pivot is in the center so bones are rotating weirdly. You can always just create empty GO and parent them to bones. Keep posted :)

[@Tdddy]

@@nishadtardalkar8737 yes, this is what I suspected. I made a simple wormlike shape in blender and used it, but again. rather than move at the joints, the object would move at the center. Maybe it has something to do with separating my prefab when i un-parent it.

[@matt237z]

Can't add script component 'IK' because the script class cannot be found. Make sure that there are no compile errors and that the file name and class name match. i get this error message

[@Ahatcho21]

Thank you!

[@せちよヒリマン]

Please make a tutorial on how to make the bones and updated tutorial

[@heyer777]

btw,u have no need for creating a new gameobject for bones

[@강우호-g7k]

you are angel :)

[@oldleaf3755]

him my angel back off

[@heyer777]

devs like u r the best

[@suricato9463]

THANKSSS YOUUU!!!! you deserve more subss! i'll give you credits on my game

[@CopyCatBlack]

Hi, If I parent all the bone to the root bone just like the P2design will it work, will I able to make the character aim or look different directions or rotate the bone ?

[@raymond1161]

you are awesome man

[@SuperBobs22]

thanks!!!

[@CopyCatBlack]

It would be much better if you make a small tut for this how to setup the character for generic rig

[@nishadtardalkar8737]

I'll try to do it. There are updates to this as well over the past years which I haven't uploaded yet. The code is not that big though, you can easily make changes according to your needs.

[@CopyCatBlack]

@@nishadtardalkar8737 btw is this script compatible with P2design rig because inside this rig he unparent all the bone and parent all the bone to root bone soo is this script compatible with p2design

[@anasali-xv9dt]

good job

[@delayshanchen8834]

so... if i am using it on a generic human module... do i need to separate the bones of hand and arm? i mean most of the character's bones are having child parent relations... if i do this then the character will look weird...

[@nishadtardalkar8737]

A price to pay to get it done on any type of bone chain. If you take a look at my github page for this plugin there is a human character and its rig hierarchy is somewhat like any general humanoid, just the portions that need IK should be modified.

[@delayshanchen8834]

@@nishadtardalkar8737 and~ one more question... does it works with rotation? thank you~

[@nishadtardalkar8737]

@@delayshanchen8834 I dont think I understand what you mean

[@delayshanchen8834]

@@nishadtardalkar8737 like unity in-built function SetIKRotation.

[@delayshanchen8834]

rotate the target object. and the other bone follow it.

[@せちよヒリマン]

I attached my issue on your github page

[@nishadtardalkar8737]

plz make sure bones follow all the rules mentioned in the video.. I did rechecked on my end and its still working even after changes made after posting the video

[@せちよヒリマン]

The bones are not parented to each other. As for my IK solver set up I did leaf bone for element 0, middle for 1, and top bone for element 2. For end of last bone I put the leaf bone. I’m not sure what else I could be doing that may be causing this.

[@nishadtardalkar8737]

@@せちよヒリマン maybe check your scales and rotations.. they should be reset

[@せちよヒリマン]

Augmissive Arts not sure what you mean by reset? Could you perhaps make a private video on how to make the bones as you premade them in the video? Or maybe a I could contact you from some place else. Answer when convenient.

[@せちよヒリマン]

Augmissive Arts perhaps I need constraints or something?

[@Albert-Freeman]

I pressed the reset button and now my spider bot looks like this i.gyazo.com/a327f680bde45f8bb48099c8c23ff8c7.png And I can't go back with control z, I need to copy and paste a new leg and add all the stuff again fml

[@ed-uh9sh]

me too

[@gambikules]

Separate bones....this is useless