CODEWITHSUNDEEP
unity-game-engine
Rahul Iyer
Rahul Iyer

Reputation: 21025

Is inverse kinematics possible without additional reference objects?

I was looking at this tutorial: https://docs.unity3d.com/Manual/InverseKinematics.html

In that tutorial, they change the body position of hands, head etc, by setting a target object to hold or look at.

In this project: https://hackaday.com/2016/01/23/amazing-imu-based-motion-capture-suit-turns-you-into-a-cartoon/

The guy access the blender api, and directly sets the transform of several bones.

Is it possible to do the same in Unity ? I do not need any assistance with getting data from sensors etc. I'm just looking for information on what is the equivalent API in unity to directly set the orientation of specific body parts of a skeleton at runtime.

Upvotes: 1

Views: 85

Answers (1)

Yuri Nudelman
Yuri Nudelman

Reputation: 2943

You are probably looking for SkinnedMeshRenderer.

When you import a model from some 3d soft, such as blender, it will have SkinnedMeshRenderer component.

What you would want too check out is SkinnedMeshRenderer.bones, which get you the array of bones (as an array of Transform) used to control its pose. You can modify its elements, thus affecting the pose. So you can do stuff like this:

var bones = this.GetComponent<SkinnedMeshRenderer>().bones;
bones[0].localRotation = bones[0].localRotation *  Quaternion.Euler(0f, 45f, 0f);

Just play around with it, it is the best way to see.

For more advanced manipulations, you can also set your own array of bones and specify their weights, with SetBlendShapeWeight / GetBlendShapeWeight, but this is probably more than what you need.

Upvotes: 1

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