Cannot find type 'ViewportDescriptor' in scope

[omnia-tom]

Hi,

I am trying to integrate the code from the Sample app, but I am running into a few issues with the Splat Renderer. The file is correctly loading, but crashing on the rendering when it is being casted from SplatRenderer to ModelRenderer.

    case .gaussianSplat(let url):
        let splat = try SplatRenderer(device: device,
                                      colorFormat: layerRenderer.configuration.colorFormat,
                                      depthFormat: .depth32Float_stencil8,
                                      stencilFormat: .depth32Float_stencil8,
                                      sampleCount: 1,
                                      maxViewCount: layerRenderer.properties.viewCount,
                                      maxSimultaneousRenders: MetalSplatterConstants.maxSimultaneousRenders)
        try await splat.readPLY(from: url)
        modelRenderer = splat as! any ModelRenderer

I have ensured to add the extension to implement ModelRender render function:

import Metal
import MetalSplatter

extension SplatRenderer: ModelRenderer {
public func render(viewports: [ModelRendererViewportDescriptor],
colorTexture: MTLTexture,
colorStoreAction: MTLStoreAction,
depthTexture: MTLTexture?,
rasterizationRateMap: MTLRasterizationRateMap?,
renderTargetArrayLength: Int,
to commandBuffer: MTLCommandBuffer) throws {
let remappedViewports = viewports.map { viewport -> ViewportDescriptor in
ViewportDescriptor(viewport: viewport.viewport,
projectionMatrix: viewport.projectionMatrix,
viewMatrix: viewport.viewMatrix,
screenSize: viewport.screenSize)
}
try render(viewports: remappedViewports,
colorTexture: colorTexture,
colorStoreAction: colorStoreAction,
depthTexture: depthTexture,
rasterizationRateMap: rasterizationRateMap,
renderTargetArrayLength: renderTargetArrayLength,
to: commandBuffer)
}
}

but I am receiving an error that ViewportDescriptor does not exist. I have MetalSplatter version, but it seems that the SplatRenderer class when I click into the definition does not have this ViewportDescriptor class. Is there anything you can advise on to help this?