kinect v2 关节朝向 unity3d 四元数

Question

我正在尝试根据来自 Kinect V2 的数据使用 Unity3D 移动头像， 问题是当我将多关节方向应用于统一 Slerp 变换时，

如何计算新的四元数以正确模拟实时人体运动？

            float ox, oy, oz, ow;

            ox = body.JointOrientations[_SpineMid].Orientation.X;
            oy = body.JointOrientations[_SpineMid].Orientation.Y;
            oz = body.JointOrientations[_SpineMid].Orientation.Z;
            ow = body.JointOrientations[_SpineMid].Orientation.W;
            //SpineMid.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            SpineMid.transform.localRotation = Quaternion.Slerp(SpineMid.transform.localRotation, new Quaternion(ox, oy, oz, ow), Time.time * 0.1f);

            float ox, oy, oz, ow;

            ox = body.JointOrientations[_SpineMid].Orientation.X;
            oy = body.JointOrientations[_SpineMid].Orientation.Y;
            oz = body.JointOrientations[_SpineMid].Orientation.Z;
            ow = body.JointOrientations[_SpineMid].Orientation.W;
            //SpineMid.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            SpineMid.transform.localRotation = Quaternion.Slerp(SpineMid.transform.localRotation, new Quaternion(ox, oy, oz, ow), Time.time * 0.1f);

            ox = body.JointOrientations[_SpineBase].Orientation.X;
            oy = body.JointOrientations[_SpineBase].Orientation.Y;
            oz = body.JointOrientations[_SpineBase].Orientation.Z;
            ow = body.JointOrientations[_SpineBase].Orientation.W;
            //SpineBase.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            SpineBase.transform.localRotation = Quaternion.Slerp(SpineBase.transform.localRotation, new Quaternion(ox, oy, oz, ow), Time.time * 0.1f);

最有趣的部分是当我尝试将之前的 Slerp 转换应用到头像中的每个关节时

float ox, oy, oz, ow;

            ox = body.JointOrientations[_SpineMid].Orientation.X;
            oy = body.JointOrientations[_SpineMid].Orientation.Y;
            oz = body.JointOrientations[_SpineMid].Orientation.Z;
            ow = body.JointOrientations[_SpineMid].Orientation.W;
            //SpineMid.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            SpineMid.transform.localRotation = Quaternion.Slerp(SpineMid.transform.localRotation, new Quaternion(ox, oy, oz, ow), Time.time * 0.1f);

            ox = body.JointOrientations[_SpineBase].Orientation.X;
            oy = body.JointOrientations[_SpineBase].Orientation.Y;
            oz = body.JointOrientations[_SpineBase].Orientation.Z;
            ow = body.JointOrientations[_SpineBase].Orientation.W;
            //SpineBase.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            SpineBase.transform.localRotation = Quaternion.Slerp(SpineBase.transform.localRotation, new Quaternion(ox, oy, oz, ow), Time.time * 0.1f);


            ox = body.JointOrientations[_Neck].Orientation.X;
            oy = body.JointOrientations[_Neck].Orientation.Y;
            oz = body.JointOrientations[_Neck].Orientation.Z;
            ow = body.JointOrientations[_Neck].Orientation.W;
            //Neck.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            Neck.transform.localRotation = Quaternion.Slerp(Neck.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_Head].Orientation.X;
            oy = body.JointOrientations[_Head].Orientation.Y;
            oz = body.JointOrientations[_Head].Orientation.Z;
            ow = body.JointOrientations[_Head].Orientation.W;
            //Head.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            Head.transform.localRotation = Quaternion.Slerp(Head.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_ShoulderRight].Orientation.X;
            oy = body.JointOrientations[_ShoulderRight].Orientation.Y;
            oz = body.JointOrientations[_ShoulderRight].Orientation.Z;
            ow = body.JointOrientations[_ShoulderRight].Orientation.W;
            //ShoulderRight.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            ShoulderRight.transform.localRotation = Quaternion.Slerp(ShoulderRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_ElbowRight].Orientation.X;
            oy = body.JointOrientations[_ElbowRight].Orientation.Y;
            oz = body.JointOrientations[_ElbowRight].Orientation.Z;
            ow = body.JointOrientations[_ElbowRight].Orientation.W;
            //ElbowRight.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            ElbowRight.transform.localRotation = Quaternion.Slerp(ElbowRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_HandRight].Orientation.X;
            oy = body.JointOrientations[_HandRight].Orientation.Y;
            oz = body.JointOrientations[_HandRight].Orientation.Z;
            ow = body.JointOrientations[_HandRight].Orientation.W;
            //HandRight.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            HandRight.transform.localRotation = Quaternion.Slerp(HandRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_ShoulderLeft].Orientation.X;
            oy = body.JointOrientations[_ShoulderLeft].Orientation.Y;
            oz = body.JointOrientations[_ShoulderLeft].Orientation.Z;
            ow = body.JointOrientations[_ShoulderLeft].Orientation.W;
            //ShoulderLeft.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            ShoulderLeft.transform.localRotation = Quaternion.Slerp(ShoulderLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_ElbowLeft].Orientation.X;
            oy = body.JointOrientations[_ElbowLeft].Orientation.Y;
            oz = body.JointOrientations[_ElbowLeft].Orientation.Z;
            ow = body.JointOrientations[_ElbowLeft].Orientation.W;
            //ElbowLeft.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            ElbowLeft.transform.localRotation = Quaternion.Slerp(ElbowLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_HandLeft].Orientation.X;
            oy = body.JointOrientations[_HandLeft].Orientation.Y;
            oz = body.JointOrientations[_HandLeft].Orientation.Z;
            ow = body.JointOrientations[_HandLeft].Orientation.W;
            //HandLeft.transform.localRotation = Quaternion.Lerp(transform.localRotation, new Quaternion(ox*360, oz*360, oy*360, ow*360), 0.03f);
            HandLeft.transform.localRotation = Quaternion.Slerp(HandLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_HipsLeft].Orientation.X;
            oy = body.JointOrientations[_HipsLeft].Orientation.Y;
            oz = body.JointOrientations[_HipsLeft].Orientation.Z;
            ow = body.JointOrientations[_HipsLeft].Orientation.W;
            //HipsLeft.transform.rotation = new Quaternion(ox, oy, oz, ow);
            HipsLeft.transform.localRotation = Quaternion.Slerp(HipsLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_KneeRight].Orientation.X;
            oy = body.JointOrientations[_KneeRight].Orientation.Y;
            oz = body.JointOrientations[_KneeRight].Orientation.Z;
            ow = body.JointOrientations[_KneeRight].Orientation.W;
            //KneeRight.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            KneeRight.transform.localRotation = Quaternion.Slerp(KneeRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_AnkleRight].Orientation.X;
            oy = body.JointOrientations[_AnkleRight].Orientation.Y;
            oz = body.JointOrientations[_AnkleRight].Orientation.Z;
            ow = body.JointOrientations[_AnkleRight].Orientation.W;
            //AnkleRight.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            AnkleRight.transform.localRotation = Quaternion.Slerp(AnkleRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_FootRight].Orientation.X;
            oy = body.JointOrientations[_FootRight].Orientation.Y;
            oz = body.JointOrientations[_FootRight].Orientation.Z;
            ow = body.JointOrientations[_FootRight].Orientation.W;
            //FootRight.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            FootRight.transform.localRotation = Quaternion.Slerp(FootRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_HipsRight].Orientation.X;
            oy = body.JointOrientations[_HipsRight].Orientation.Y;
            oz = body.JointOrientations[_HipsRight].Orientation.Z;
            ow = body.JointOrientations[_HipsRight].Orientation.W;
            //HipsRight.transform.rotation = new Quaternion(ox, oy, oz, ow);
            HipsRight.transform.localRotation = Quaternion.Slerp(HipsRight.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_KneeLeft].Orientation.X;
            oy = body.JointOrientations[_KneeLeft].Orientation.Y;
            oz = body.JointOrientations[_KneeLeft].Orientation.Z;
            ow = body.JointOrientations[_KneeLeft].Orientation.W;
            //KneeLeft.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            KneeLeft.transform.localRotation = Quaternion.Slerp(KneeLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_AnkleLeft].Orientation.X;
            oy = body.JointOrientations[_AnkleLeft].Orientation.Y;
            oz = body.JointOrientations[_AnkleLeft].Orientation.Z;
            ow = body.JointOrientations[_AnkleLeft].Orientation.W;
            //AnkleLeft.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            AnkleLeft.transform.localRotation = Quaternion.Slerp(AnkleLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

            ox = body.JointOrientations[_FootLeft].Orientation.X;
            oy = body.JointOrientations[_FootLeft].Orientation.Y;
            oz = body.JointOrientations[_FootLeft].Orientation.Z;
            ow = body.JointOrientations[_FootLeft].Orientation.W;
            //FootLeft.transform.localRotation = new Quaternion(ox, oy, oz, ow);
            FootLeft.transform.localRotation = Quaternion.Slerp(FootLeft.transform.localRotation, new Quaternion(ox * 360, oy * 360, oz * 360, ow * 360), 0.03f);

注意：所有这些打印屏幕都是在 T-Pose 面向 KinectV2 传感器的情况下拍摄的。

Answer 1

据我所知，方向不是本地的，您需要将每个关节定向到天空，然后再应用相应的方向。