# MeshData

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.class-MeshData/

MeshData

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## Declaration

class MeshData

## Summary

Contains 3D mesh data for rendering and visualization.
`MeshData` provides access to 3D mesh geometry including vertices, indices,
normals, and texture coordinates.

## Overview

MeshData includes:

- **Vertices**: 3D position data for mesh geometry
- **Indices**: The triangles that make up the mesh
- **Normals**: Surface normal vectors for the vertices, commonly used for lighting calculations
  (only available for live meshing)
- **UVs**: Texture coordinates for the vertices, used for mapping textures to the mesh
  (only available for mesh downloader)

## Example Usage

```swift
let (status, meshData) = meshDownloader.downloadMesh(meshId: meshId)
if status.isOk() {
    print("Mesh vertices: \(meshData.vertices.count)")
    print("Mesh triangles: \(meshData.indices.count / 3)")
    // Convert to SceneKit geometry for rendering
    if let geometry = meshData.toSCNGeometry() {
        let node = SCNNode(geometry: geometry)
        sceneView.scene.rootNode.addChildNode(node)
    }
}
```

## Memory Management

Mesh data is backed by native memory that is automatically managed.
The data remains valid as long as the `MeshData` instance exists.

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## Constructors

init(fromC cMeshData: ARDK_MeshData, owner: ResourceOwner? = nil)

#### Summary

Creates mesh data from a mesh-downloader result.

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## Properties

| Name | Type | Summary |
| --- | --- | --- |
| let indicesPtr | UnsafeBufferPointer<UInt32> | Pointer to the indices data. Array of 3 indices per triangle. |
| let normalsPtr | UnsafeBufferPointer<Float>? | Pointer to the normals data. Array of 3 floats per normal. Only available for live meshing. |
| let uvsPtr | UnsafeBufferPointer<Float>? | Pointer to the UVs data. Array of 2 floats per UV. |
| let verticesPtr | UnsafeBufferPointer<Float> | Pointer to the vertices data. Array of 3 floats per vertex. |

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## Methods

| Name | Type | Summary |
| --- | --- | --- |
| toSCNGeometry | SCNGeometry? | Creates a SceneKit geometry from this mesh chunk's vertex positions, normals and triangle indices. |

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