# PointCloud.setPointsBuffer

## Summary
PointCloud.setPointsBuffer updates points buffer state on this PointCloud and marks dependent GPU data for refresh.

## Syntax
```ts
PointCloud.setPointsBuffer(buffer: GPUBuffer, pointCount: number): void
pointCloud.setPointsBuffer(buffer, pointCount);
```

## Parameters
| Name | Type | Required | Description |
| --- | --- | --- | --- |
| `buffer` | `GPUBuffer` | Yes | GPUBuffer handle used as an external data source. |
| `pointCount` | `number` | Yes | Number of points represented by the supplied data source. |

## Returns
`void` - No return value. The call applies side effects to runtime state and/or GPU resources.

## Type Details
```ts
// No additional descriptor expansion is required for this signature.
```

## Example
```js
const canvas = document.querySelector("canvas");
const wgpu = await WasmGPU.create(canvas);

const pointCloud = wgpu.createPointCloud({ data: new Float32Array([0, 0, 0, 0.1, 1, 0, 0, 0.8]), scaleTransform: { mode: "linear", domainMin: 0, domainMax: 1 } });
const buffer = wgpu.gpu.device.createBuffer({ size: 64, usage: GPUBufferUsage.STORAGE | GPUBufferUsage.COPY_DST });
const pointCount = 2;
pointCloud.setPointsBuffer(buffer, pointCount);
console.log("updated");
```

## See Also
- [PointCloud.applyScaleStats](./wasmgpu-objects-pointcloud-applyscalestats.md)
- [PointCloud.basePointSize](./wasmgpu-objects-pointcloud-basepointsize.md)
- [PointCloud.colormap](./wasmgpu-objects-pointcloud-colormap.md)
- [PointCloud.colormapStops](./wasmgpu-objects-pointcloud-colormapstops.md)
- [PointCloud.computeBoundsFromCPUData](./wasmgpu-objects-pointcloud-computeboundsfromcpudata.md)
- [PointCloud.destroy](./wasmgpu-objects-pointcloud-destroy.md)
- [PointCloud.dirtyUniforms](./wasmgpu-objects-pointcloud-dirtyuniforms.md)
- [PointCloud.dropCPUData](./wasmgpu-objects-pointcloud-dropcpudata.md)
- [PointCloud.getBounds](./wasmgpu-objects-pointcloud-getbounds.md)
- [PointCloud.getColormapForBinding](./wasmgpu-objects-pointcloud-getcolormapforbinding.md)
- [PointCloud.getColormapKey](./wasmgpu-objects-pointcloud-getcolormapkey.md)
- [PointCloud.getLocalBounds](./wasmgpu-objects-pointcloud-getlocalbounds.md)