Commands/Shaders/Get-OBSVignettingShader.ps1

function Get-OBSVignettingShader {

[Alias('Set-OBSVignettingShader','Add-OBSVignettingShader')]
param(
# Set the innerRadius of OBSVignettingShader
[ComponentModel.DefaultBindingProperty('innerRadius')]
[Single]
$InnerRadius,
# Set the outerRadius of OBSVignettingShader
[ComponentModel.DefaultBindingProperty('outerRadius')]
[Single]
$OuterRadius,
# Set the opacity of OBSVignettingShader
[ComponentModel.DefaultBindingProperty('opacity')]
[Single]
$Opacity,
# Set the notes of OBSVignettingShader
[ComponentModel.DefaultBindingProperty('notes')]
[String]
$Notes,
# The name of the source. This must be provided when adding an item for the first time
[Parameter(ValueFromPipelineByPropertyName)]
[Alias('SceneItemName')]
[String]
$SourceName,
# The name of the filter. If this is not provided, this will default to the shader name.
[Parameter(ValueFromPipelineByPropertyName)]
[String]
$FilterName,
# The inline value of the shader. This will normally be provided as a default parameter, based off of the name.
[Alias('ShaderContent')]
[String]
$ShaderText,
# If set, will force the recreation of a shader that already exists
[Management.Automation.SwitchParameter]
$Force,
# If set, will pass thru the commands that would be sent to OBS (these can be sent at any time with Send-OBS)
[Management.Automation.SwitchParameter]
$PassThru,
# If set, will not wait for a response from OBS (this will be faster, but will not return anything)
[Management.Automation.SwitchParameter]
$NoResponse,
# If set, use the shader elapsed time, instead of the OBS system elapsed time
[ComponentModel.DefaultBindingProperty('use_shader_elapsed_time')]
[Management.Automation.SwitchParameter]
$UseShaderTime
)


process {
$shaderName = 'vignetting'
$ShaderNoun = 'OBSVignettingShader'
if (-not $psBoundParameters['ShaderText']) {    
    $psBoundParameters['ShaderText'] = $ShaderText = '
//Converted to OpenGL by Q-mii & Exeldro February 21, 2022
uniform float innerRadius<
    string label = "inner radius";
    string widget_type = "slider";
    float minimum = 0.0;
    float maximum = 5.0;
    float step = 0.001;
> = 0.9;
uniform float outerRadius<
    string label = "outer radius";
    string widget_type = "slider";
    float minimum = 0.0;
    float maximum = 5.0;
    float step = 0.001;
> = 1.5;
uniform float opacity<
    string label = "opacity";
    string widget_type = "slider";
    float minimum = 0.0;
    float maximum = 1.0;
    float step = 0.001;
> = 0.8;
uniform string notes<
    string widget_type = "info";
> = "inner radius will always be shown, outer radius is the falloff";

float4 mainImage(VertData v_in) : TARGET
{
    float PI = 3.1415926535897932384626433832795;//acos(-1);

    float4 c0 = image.Sample(textureSampler, v_in.uv);
    float verticalDim = 0.5 + sin (v_in.uv.y * PI) * 0.9 ;
    
    float xTrans = (v_in.uv.x * 2) - 1;
    float yTrans = 1 - (v_in.uv.y * 2);
    
    float radius = sqrt(pow(xTrans, 2) + pow(yTrans, 2));

    float subtraction = max(0, radius - innerRadius) / max((outerRadius - innerRadius), 0.01);
    float factor = 1 - subtraction;

    float4 vignetColor = c0 * factor;
    vignetColor *= verticalDim;

    vignetColor *= opacity;
    c0 *= 1-opacity;

    float4 output_color = c0 + vignetColor;
    
    return float4(output_color);
}

'

}
$MyVerb, $myNoun = $MyInvocation.InvocationName -split '-',2
if (-not $myNoun) {
    $myNoun = $myVerb
    $myVerb = 'Get'    
}
switch -regex ($myVerb) {
    Get {
        $FilterNamePattern = "(?>$(
            if ($FilterName) {
                [Regex]::Escape($FilterName)
            }
            else {
                [Regex]::Escape($ShaderNoun -replace '^OBS' -replace 'Shader$'),[Regex]::Escape($shaderName) -join '|'
            }
        ))"

        if ($SourceName) {
            Get-OBSInput | 
                Where-Object InputName -eq $SourceName |
                Get-OBSSourceFilterList |
                Where-Object FilterName -Match $FilterNamePattern
        } else {
            $obs.Inputs |
                Get-OBSSourceFilterList |
                Where-Object FilterName -Match $FilterNamePattern
        }        
    }
    'Remove' {
        if ($SourceName) {
            Get-OBSInput | 
                Where-Object InputName -eq $SourceName |
                Get-OBSSourceFilterList |
                Where-Object FilterName -Match $FilterNamePattern |
                Remove-OBSSourceFilter
        }
    }
    '(?>Add|Set)' {
        $ShaderSettings = [Ordered]@{}
        :nextParameter foreach ($parameterMetadata in $MyInvocation.MyCommand.Parameters[@($psBoundParameters.Keys)]) {
            foreach ($parameterAttribute in $parameterMetadata.Attributes) {
                if ($parameterAttribute -isnot [ComponentModel.DefaultBindingPropertyAttribute]) { continue }
                $ShaderSettings[$parameterAttribute.Name] = $PSBoundParameters[$parameterMetadata.Name]
                if ($ShaderSettings[$parameterAttribute.Name] -is [switch]) {
                    $ShaderSettings[$parameterAttribute.Name] = $ShaderSettings[$parameterAttribute.Name] -as [bool]
                }
                continue nextParameter
            }            
        }

        if (-not $PSBoundParameters['FilterName']) {
            $filterName = $PSBoundParameters['FilterName'] = $shaderName
        }

        $ShaderFilterSplat = [Ordered]@{
            ShaderSetting = $ShaderSettings
            FilterName = $FilterName
            SourceName = $SourceName
        }        

        foreach ($CarryOnParameter in "PassThru", "NoResponse","Force") {
            if ($PSBoundParameters.ContainsKey($CarryOnParameter)) {
                $ShaderFilterSplat[$CarryOnParameter] = $PSBoundParameters[$CarryOnParameter]
            }
        }

        if (-not $script:CachedShaderFilesFromCommand) {
            $script:CachedShaderFilesFromCommand = @{}
        }

        if ($Home -and -not $script:CachedShaderFilesFromCommand[$shaderName]) {
            $MyObsPowerShellPath = Join-Path $home ".obs-powershell"
            $ThisShaderPath = Join-Path $MyObsPowerShellPath "$shaderName.shader"
            $shaderText | Set-Content -LiteralPath $ThisShaderPath
            $script:CachedShaderFilesFromCommand[$shaderName] = Get-Item -LiteralPath $ThisShaderPath
        }
        if ($script:CachedShaderFilesFromCommand[$shaderName]) {
            $ShaderFilterSplat.ShaderFile = $script:CachedShaderFilesFromCommand[$shaderName].FullName
        } else {
            $ShaderFilterSplat.ShaderText = $shaderText
        }        

        if ($myVerb -eq 'Add') {                        
            Add-OBSShaderFilter @ShaderFilterSplat
        } else {
            Set-OBSShaderFilter @ShaderFilterSplat
        }
    }
}

}


}