Add ultimate xr

Assets/UltimateXR/Runtime/Scripts/Avatar/Rig/UxrAvatarFingerBoneInfo.cs

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+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="UxrAvatarFingerBoneInfo.cs" company="VRMADA">
+//   Copyright (c) VRMADA, All rights reserved.
+// </copyright>
+// --------------------------------------------------------------------------------------------------------------------
+using System;
+using UltimateXR.Core.Math;
+using UltimateXR.Extensions.Unity.Render;
+using UnityEngine;
+
+namespace UltimateXR.Avatar.Rig
+{
+    /// <summary>
+    ///     Stores information of the bone in an <see cref="UxrAvatarFingerInfo" />.
+    /// </summary>
+    [Serializable]
+    public class UxrAvatarFingerBoneInfo
+    {
+        #region Inspector Properties/Serialized Fields
+
+        [SerializeField] private float _length;
+        [SerializeField] private float _radius;
+
+        #endregion
+
+        #region Public Types & Data
+
+        /// <summary>
+        ///     Gets the bone length.
+        /// </summary>
+        public float Length => _length;
+
+        /// <summary>
+        ///     Gets the radius of the finger along this bone.
+        /// </summary>
+        public float Radius => _radius;
+
+        #endregion
+
+        #region Internal Methods
+
+        /// <summary>
+        ///     Computes the bone length and radius.
+        /// </summary>
+        /// <param name="handRenderer">Hand renderer</param>
+        /// <param name="bone">Finger bone</param>
+        /// <param name="nextBone">Next finger bone downwards the hierarchy or null for the last bone</param>
+        /// <param name="universalFingerAxes">Finger universal coordinate system</param>
+        internal void Compute(SkinnedMeshRenderer handRenderer, Transform bone, Transform nextBone, UxrUniversalLocalAxes universalFingerAxes)
+        {
+            // Compute bounds representing the influenced part in the mesh in local bone coordinates.
+            Bounds localBounds = MeshExt.GetBoneInfluenceBounds(handRenderer, bone);
+
+            _length = 0.0f;
+            
+            // Compute bone length:
+
+            if (bone && nextBone)
+            {
+                // If we have a next bone, simply compute distance.
+                _length = Vector3.Distance(bone.position, nextBone.position);
+            }
+            else if (bone)
+            {
+                // If we have no next bone (for example, the distal bone is the last in the hierarchy), we compute the length using the influenced mesh part's local bounds.
+                _length = Vector3.Scale(universalFingerAxes.LocalForward, localBounds.size).magnitude;
+            }
+
+            // Compute radius using the influenced part of the mesh's bounds computed earlier.
+            _radius = 0.5f * Mathf.Max(Vector3.Scale(universalFingerAxes.LocalRight, localBounds.size).magnitude, Vector3.Scale(universalFingerAxes.LocalUp, localBounds.size).magnitude);
+        }
+
+        #endregion
+    }
+}