网格.GetBlendShapeBufferRange

参数

返回值

BlendShapeBufferRange 一个描述给定混合形状的数据的开始和结束索引的结构。

说明

获取给定混合形状的混合形状顶点数据的位置。

当您用 Mesh.GetBlendShapeBuffer 调用 BlendShapeBufferLayout.PerShape 时，Unity 会返回一个 GraphicsBuffer，其中包含混合形状顶点数据，按混合形状排序。

当您调用此函数时，Unity 会为给定的混合形状返回 BlendShapeBufferRange。使用该范围可以在 GraphicsBuffer 中找到该混合形状的数据。

using UnityEngine;
using UnityEngine.Rendering;

public class Example : MonoBehaviour
{
    public Mesh mesh;
    public ComputeShader computeShader;

    void Start()
    {
        // Fetch GraphicsBuffer with Blend Shape data, ordered per shape, from the mesh
        var perShapeBuffer = mesh.GetBlendShapeBuffer(BlendShapeBufferLayout.PerShape);

        // Iterate over all Blend Shapes in a mesh
        for(int blendShapeIndex = 0; blendShapeIndex  < mesh.blendShapeCount; ++blendShapeIndex)
        {
            // Fetch which indices in the buffer that are part of this Blend Shape
            var blendShapeRange = mesh.GetBlendShapeBufferRange(blendShapeIndex);

            // Set the start and end indices of the Blend Shape in the compute shader
            computeShader.SetInt("_StartIndex", (int)blendShapeRange.startIndex);
            computeShader.SetInt("_EndIndex", (int)blendShapeRange.endIndex);

            // Dispatch compute shader and access data between start and end index for this Blend Shape
            computeShader.Dispatch(0, 64, 1, 1);
        }

        // Dispose of GraphicsBuffer to avoid leak memory
        perShapeBuffer.Dispose();
    }
}

其他资源：UnityEngine.BlendShapeBufferRange、Mesh.GetBlendShapeBuffer、BlendShapeBufferLayout.PerShape