C# 如何阻止Kinect旋转

我正在使用C#和XNA4.0开发一个Kinect项目。现在面临一个我无法解决的问题。当玩家转身时，化身不会转身，但它的手臂和腿正试图转身。这会导致视图不好，所以我想阻止手臂和腿部的旋转运动。虽然我尝试了一些方法，但没有成功。例如，右臂运动：

   else if (bone.EndJoint == JointType.ElbowRight || bone.EndJoint == JointType.WristRight)
        {
            Matrix tempMat = KinectHelper.Matrix4ToXNAMatrix(bone.HierarchicalRotation.Matrix);

            if (bone.EndJoint == JointType.ElbowRight)
            {
                // Add a small adjustment rotation to correct for the avatar skeleton shoulder/upper arm bones.
                // The dude should now be able to have arms correctly down at his sides when avateering
                Matrix adjustment = Matrix.CreateRotationZ(MathHelper.ToRadians(15));  // 15 degree rotation around the local Kinect  z axis for the upper arm bone.
                tempMat *= adjustment;
            }

            // Kinect = +Y along arm, +X up, +Z forward in body coordinate system
            // Avatar = +X along arm, +Y back, +Z down
            Quaternion kinectRotation = KinectHelper.DecomposeMatRot(tempMat);    // XYZ
            Quaternion avatarRotation = new Quaternion(kinectRotation.Y, -kinectRotation.Z, -kinectRotation.X, kinectRotation.W); // transform from Kinect to avatar coordinate system
            tempMat = Matrix.CreateFromQuaternion(avatarRotation);

            this.ReplaceBoneMatrix(bone.EndJoint, tempMat, false, ref boneTransforms);
        }

有没有办法阻止旋转

我用以下方法锁定了臀部中心：

   if (bone.StartJoint == JointType.HipCenter && bone.EndJoint == JointType.HipCenter)
        {
            // Unless in seated mode, the hip center is special - it is the root of the NuiSkeleton and describes the skeleton orientation in the world
            // (camera) coordinate system. All other bones/joint orientations in the hierarchy have hip center as one of their parents.
            // However, if in seated mode, the shoulder center then holds the skeleton orientation in the world (camera) coordinate system.
            bindRoot.Translation = Vector3.Zero;
            Matrix invBindRoot = Matrix.Invert(bindRoot);

            //Matrix hipOrientation = KinectHelper.Matrix4ToXNAMatrix(bone.HierarchicalRotation.Matrix);

            // Here we create a rotation matrix for the hips from the inverse of the bind pose
            // for the pelvis rotation and the inverse of the bind pose for the root node (0) in the Dude model.
            // This multiplication effectively removes the initial 90 degree rotations set in the first two model nodes.
            Matrix pelvis = boneTransforms[1];
            pelvis.Translation = Vector3.Zero; // Ensure pure rotation as we explicitly set world translation from the Kinect camera below.
            Matrix invPelvis = Matrix.Invert(pelvis);

            //Matrix combined = (invBindRoot * hipOrientation) * invPelvis;
            Matrix combined = invBindRoot * invPelvis;
            Matrix adjustment = Matrix.CreateRotationZ(MathHelper.ToRadians(180));
            combined *= adjustment;
            this.ReplaceBoneMatrix(JointType.HipCenter, combined, true, ref boneTransforms);