[C#/WINUI3/.NET8] ScalarKeyFrameAnimation 클래스 : PointLight 객체를 움직이는 애니메이션 만들기

■ ScalarKeyFrameAnimation 클래스를 사용해 PointLight 객체를 움직이는 애니메이션을 만드는 방법을 보여준다.

※ 비주얼 스튜디오에서 TestProject(Unpackaged) 모드로 빌드한다.
※ TestProject.csproj 프로젝트 파일에서 WindowsPackageType 태그를 None으로 추가했다.

▶ MainPage.xaml


<?xml version="1.0" encoding="utf-8"?>
<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid
        Margin="50"
        Background="Black">
        <Viewbox
            Stretch="Uniform"
            StretchDirection="DownOnly">
            <TextBlock Name="textBlock"
                HorizontalAlignment="Center"
                VerticalAlignment="Center"
                Foreground="DimGray"
                TextAlignment="Center"
                FontFamily="SegoeUI"
                FontWeight="Bold"
                FontSize="100"
                Text="Text Shimmer" />
        </Viewbox>
    </Grid>
</Page>

<?xml version="1.0" encoding="utf-8"?>

<Page x:Class="TestProject.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"

FontFamily="나눔고딕코딩"

FontSize="16">

<Grid

Margin="50"

Background="Black">

<Viewbox

Stretch="Uniform"

StretchDirection="DownOnly">

<TextBlock Name="textBlock"

HorizontalAlignment="Center"

VerticalAlignment="Center"

Foreground="DimGray"

TextAlignment="Center"

FontFamily="SegoeUI"

FontWeight="Bold"

FontSize="100"

Text="Text Shimmer" />

</Viewbox>

</Grid>

</Page>

▶ MainPage.xaml.cs


using System;
using System.Numerics;

using Microsoft.UI;
using Microsoft.UI.Composition;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Hosting;

namespace TestProject;

/// <summary>
/// 메인 페이지
/// </summary>
public sealed partial class MainPage : Page
{
    //////////////////////////////////////////////////////////////////////////////////////////////////// Field
    ////////////////////////////////////////////////////////////////////////////////////////// Private

    #region Field

    /// <summary>
    /// 합성자
    /// </summary>
    private Compositor compositor;

    /// <summary>
    /// 포인트 라이트
    /// </summary>
    private PointLight pointLight;

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
    ////////////////////////////////////////////////////////////////////////////////////////// Public

    #region 생성자 - MainPage()

    /// <summary>
    /// 생성자
    /// </summary>
    public MainPage()
    {
        InitializeComponent();

        Loaded += Page_Loaded;
    }

    #endregion

    //////////////////////////////////////////////////////////////////////////////////////////////////// Method
    ////////////////////////////////////////////////////////////////////////////////////////// Private

    #region 페이지 로드시 처리하기 - Page_Loaded(sender, e)

    /// <summary>
    /// 페이지 로드시 처리하기
    /// </summary>
    /// <param name="sender">이벤트 발생자</param>
    /// <param name="e">이벤트 인자</param>
    private void Page_Loaded(object sender, RoutedEventArgs e)
    {
        this.compositor = ElementCompositionPreview.GetElementVisual(this.textBlock).Compositor;

        Visual textBlockVisual = ElementCompositionPreview.GetElementVisual(this.textBlock);

        this.pointLight = this.compositor.CreatePointLight();

        this.pointLight.CoordinateSpace = textBlockVisual;
        this.pointLight.Offset          = new Vector3(0, (float)this.textBlock.ActualHeight / 2, (float)this.textBlock.FontSize);
        this.pointLight.Color           = Colors.White;

        this.pointLight.Targets.Add(textBlockVisual);

        ScalarKeyFrameAnimation scalarKeyFrameAnimation = this.compositor.CreateScalarKeyFrameAnimation();

        scalarKeyFrameAnimation.InsertKeyFrame(1, (float)this.textBlock.ActualWidth);

        scalarKeyFrameAnimation.Direction         = AnimationDirection.Alternate;
        scalarKeyFrameAnimation.IterationBehavior = AnimationIterationBehavior.Forever;
        scalarKeyFrameAnimation.Duration          = TimeSpan.FromSeconds(2);

        this.pointLight.StartAnimation("Offset.X", scalarKeyFrameAnimation);
    }

    #endregion
}

using System;

using System.Numerics;

using Microsoft.UI;

using Microsoft.UI.Composition;

using Microsoft.UI.Xaml;

using Microsoft.UI.Xaml.Controls;

using Microsoft.UI.Xaml.Hosting;

namespace TestProject;

/// <summary>

/// 메인 페이지

/// </summary>

public sealed partial class MainPage : Page

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 합성자

/// </summary>

private Compositor compositor;

/// <summary>

/// 포인트 라이트

/// </summary>

private PointLight pointLight;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainPage()

/// <summary>

/// 생성자

/// </summary>

public MainPage()

{

InitializeComponent();

Loaded += Page_Loaded;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

#region 페이지 로드시 처리하기 - Page_Loaded(sender, e)

/// <summary>

/// 페이지 로드시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Page_Loaded(object sender, RoutedEventArgs e)

{

this.compositor = ElementCompositionPreview.GetElementVisual(this.textBlock).Compositor;

Visual textBlockVisual = ElementCompositionPreview.GetElementVisual(this.textBlock);

this.pointLight = this.compositor.CreatePointLight();

this.pointLight.CoordinateSpace = textBlockVisual;

this.pointLight.Offset = new Vector3(0, (float)this.textBlock.ActualHeight / 2, (float)this.textBlock.FontSize);

this.pointLight.Color = Colors.White;

this.pointLight.Targets.Add(textBlockVisual);

ScalarKeyFrameAnimation scalarKeyFrameAnimation = this.compositor.CreateScalarKeyFrameAnimation();

scalarKeyFrameAnimation.InsertKeyFrame(1, (float)this.textBlock.ActualWidth);

scalarKeyFrameAnimation.Direction = AnimationDirection.Alternate;

scalarKeyFrameAnimation.IterationBehavior = AnimationIterationBehavior.Forever;

scalarKeyFrameAnimation.Duration = TimeSpan.FromSeconds(2);

this.pointLight.StartAnimation("Offset.X", scalarKeyFrameAnimation);

}

#endregion

}

TestProject.zip