function GenerateIconAndMesh {
    param(
        $file
    )
    try {
        $originalImage = [System.Drawing.Image]::FromFile($file.FullName)
        $maxSize = [Math]::Max($originalImage.Width, $originalImage.Height)
        $aspectRatio = $originalImage.Width / $originalImage.Height
        $squareImage = New-Object System.Drawing.Bitmap $maxSize, $maxSize
        $graphics = [System.Drawing.Graphics]::FromImage($squareImage)
        $graphics.Clear([System.Drawing.Color]::Transparent)
        $x = ($maxSize - $originalImage.Width) / 2
        $y = ($maxSize - $originalImage.Height) / 2
        $graphics.DrawImage($originalImage, $x, $y, $originalImage.Width, $originalImage.Height)
        $resizedImage = New-Object System.Drawing.Bitmap 128, 128
        $resizeGraphics = [System.Drawing.Graphics]::FromImage($resizedImage)
        $resizeGraphics.InterpolationMode = [System.Drawing.Drawing2D.InterpolationMode]::HighQualityBicubic
        $resizeGraphics.DrawImage($squareImage, 0, 0, 128, 128)
        $resizeGraphics.Dispose()
        $newFilePath = [IO.Path]::Combine($file.DirectoryName, "icon.png")
        $resizedImage.Save($newFilePath)
        Write-Host "Saved icon to $newFilePath"
        $jsonPath = Join-Path $file.DirectoryName "decal.json"
        if (Test-Path $jsonPath) {
            $json = Get-Content $jsonPath -Raw | ConvertFrom-Json
            $json.Vector.colossal_MeshSize.x = $aspectRatio * 1.5
            $json.Vector.colossal_MeshSize.z = 1.5
            $json | ConvertTo-Json -Depth 10 | Set-Content $jsonPath
            Write-Host "Aspect Ratio = $aspectRatio"
        }
        else {
            Write-Warning "decal.json not found in the directory of $($file.DirectoryName)"
        }
    }
    catch {
        Write-Warning "Error processing file $($file.FullName): $_"
    }
    finally {
        # dispose
        if ($null -ne $graphics) {
            $graphics.Dispose()
        }
        if ($null -ne $squareImage) {
            $squareImage.Dispose()
        }
        if ($null -ne $resizedImage) {
            $resizedImage.Dispose()
        }
        if ($null -ne $originalImage) {
            $resizedImage.Dispose()
        }
    }
}
Get-ChildItem | Foreach-Object {
    if ($_.Extension -eq ".png") {
        $folder = "./$($_.BaseName)"
        mkdir $folder -ErrorAction SilentlyContinue
        $base = "./$($_.BaseName)/_BaseColorMap.png"
        Copy-Item $_.FullName -Destination $base
        # $icon = "./$($_.BaseName)/icon.png"
        # Copy-Item $_.FullName -Destination $icon
        if (Test-Path ./decal.json) {
            Copy-Item ./decal.json -Destination $folder
        }
        else {
            Write-Warning "decal.json not found"
        }
        GenerateIconAndMesh(Get-Item $base)
    }
}