[1.0] LookAtTarget does not work correctly if a character isn't facing +Z at scene start (+ fix?)

[exqt]

Environments (please complete the following information):

• UniVRM version: 0.124.1
• Unity version: Unity-2022.3.6f1
• OS: Windows 10

Describe the bug

• video

https://github.com/vrm-c/UniVRM/assets/8168124/931ea800-e669-4f07-b31c-9eb0470f5132

• A clear and concise description of what the bug is. In the video, the root object contains a VRM character, and LookAtTarget works well initially. However, after I rotated the root object and start the scene, LookAtTarget breaks.

• Potential fix I believe this bug occurs because some lookAt related code uses world rotation instead of local rotation. Here is a fix I found:

VRM10\Runtime\Components\Vrm10Runtime\Vrm10RuntimeLookAt.cs

        private static Transform InitializeLookAtOriginTransform(Transform rawHead, Transform actualHead, Vector3 eyeOffsetValue)
        {
            // NOTE: このメソッドを実行するとき、モデル全体は初期姿勢（T-Pose）でなければならない。
            var lookAtOrigin = new GameObject("_look_at_origin_").transform;
            lookAtOrigin.SetParent(actualHead);
            lookAtOrigin.position = rawHead.TransformPoint(eyeOffsetValue);
-           lookAtOrigin.rotation = Quaternion.identity;
+           lookAtOrigin.localRotation = Quaternion.identity;

            return lookAtOrigin;
        }

VRM10\Runtime\Components\LookAt\LookAtEyeDirectionApplicableToBone.cs

        public LookAtEyeDirectionApplicableToBone(Transform leftEye, Transform rightEye,
            CurveMapper horizontalOuter, CurveMapper horizontalInner, CurveMapper verticalDown, CurveMapper verticalUp)
        {
            _leftEye = leftEye;
-           var leftEyeRotation = _leftEye.rotation;
+           var leftEyeRotation = _leftEye.localRotation;
            _leftEyePreMultiplyRotation = _leftEye.localRotation * Quaternion.Inverse(leftEyeRotation);
            _leftEyePostMultiplyRotation = leftEyeRotation;

            // and same for rightEye

[shingotabuchi]

Thanks I am facing the same problem and this helped me.

UniVRM version: 0.125.0 Unity version: Unity-2022.3.40f1 OS: Windows 11

[ousttrue]

#2427