Mesh.GetBonesPerVertex

返回

NativeArray<byte> 返回每个顶点的非零骨骼权重数量。

描述

每个顶点的非零骨骼权重数量。

返回数组的大小为 Mesh.vertexCount 或 0。此数组按顶点索引顺序进行排序。

与 Mesh.GetAllBoneWeights 结合使用来获取网格中顶点的骨骼权重。

另请参阅：Mesh.GetAllBoneWeights、Mesh.SetBoneWeights、ModelImporter.maxBonesPerVertex、QualitySettings.skinWeights、SkinnedMeshRenderer.quality。

using UnityEngine;

public class TestSkinnedMesh : MonoBehaviour {
    void Start()
    {
        // Get a reference to the mesh
        var skinnedMeshRenderer = GetComponent<SkinnedMeshRenderer>();
        var mesh = skinnedMeshRenderer.sharedMesh;

        // Get the number of bone weights per vertex
        var bonesPerVertex = mesh.GetBonesPerVertex();
        if (bonesPerVertex.Length == 0)
        {
             return;
        }

        // Get all the bone weights, in vertex index order
        var boneWeights = mesh.GetAllBoneWeights();

        // Keep track of where we are in the array of BoneWeights, as we iterate over the vertices
        var boneWeightIndex = 0;

        // Iterate over the vertices
        for (var vertIndex = 0; vertIndex < mesh.vertexCount; vertIndex++)
        {
            var totalWeight = 0f;
            var numberOfBonesForThisVertex = bonesPerVertex[vertIndex];
            Debug.Log("This vertex has " + numberOfBonesForThisVertex + " bone influences");

            // For each vertex, iterate over its BoneWeights
            for (var i = 0; i < numberOfBonesForThisVertex; i++)
            {
                var currentBoneWeight = boneWeights[boneWeightIndex];
                totalWeight += currentBoneWeight.weight;
                if (i > 0)
                {
                    Debug.Assert(boneWeights[boneWeightIndex - 1].weight >= currentBoneWeight.weight);
                }
                boneWeightIndex++;
            }
            Debug.Assert(Mathf.Approximately(1f, totalWeight));
        }
    }
}