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[Home](./index.md) &gt; [@three3d/volume](./volume.md) &gt; [VolumeMesh](./volume.volumemesh.md) &gt; [toMaterialDepth](./volume.volumemesh.tomaterialdepth.md)

## VolumeMesh.toMaterialDepth() method

将世界坐标系下的深度转为 material 空间下的深度

**Signature:**

```typescript
toMaterialDepth(axis: Axis, depth: number): number;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  axis | Axis | 材质空间下的坐标轴 |
|  depth | number | 深度 |

**Returns:**

number