Matrix3DProjection 類別

參考

定義

命名空間:: Microsoft.UI.Xaml.Media

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

編輯

將 Matrix3D 投影套用至物件。

public ref class Matrix3DProjection sealed : Projection

/// [Microsoft.UI.Xaml.Markup.ContentProperty(Name="ProjectionMatrix")]
/// [Windows.Foundation.Metadata.Activatable(65536, "Microsoft.UI.Xaml.WinUIContract")]
/// [Windows.Foundation.Metadata.ContractVersion(Microsoft.UI.Xaml.WinUIContract, 65536)]
/// [Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
/// [Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
class Matrix3DProjection final : Projection

[Microsoft.UI.Xaml.Markup.ContentProperty(Name="ProjectionMatrix")]
[Windows.Foundation.Metadata.Activatable(65536, "Microsoft.UI.Xaml.WinUIContract")]
[Windows.Foundation.Metadata.ContractVersion(typeof(Microsoft.UI.Xaml.WinUIContract), 65536)]
[Windows.Foundation.Metadata.MarshalingBehavior(Windows.Foundation.Metadata.MarshalingType.Agile)]
[Windows.Foundation.Metadata.Threading(Windows.Foundation.Metadata.ThreadingModel.Both)]
public sealed class Matrix3DProjection : Projection

Public NotInheritable Class Matrix3DProjection
Inherits Projection

<Matrix3DProjection .../>
-or-
<!--xmlns:m3d="using:Windows.UI.Xaml.Media.Media3D"-->
<Matrix3DProjection>
  <m3d:Matrix3D>matrix3DInitializationString</m3d:Matrix3D>
</Matrix3DProjection>

繼承: Object Platform::Object IInspectable DependencyObject Projection Matrix3DProjection

屬性: ContentPropertyAttribute ActivatableAttribute ContractVersionAttribute MarshalingBehaviorAttribute ThreadingAttribute

範例

本範例會使用簡單的 Matrix3D 矩陣，在按兩下影像時，以 X 和 Y 方向轉換影像。

<!-- When you click on the image, the projection is applied. -->
<Image PointerPressed="ApplyProjection" x:Name="BeachImage" Source="guy_by_the_beach.jpg"
       Width="200"/>

private void ApplyProjection(Object sender, PointerRoutedEventArgs e)
{
    Matrix3D m = new Matrix3D();

    // This matrix simply translates the image 100 pixels
    // down and 100 pixels right.
    m.M11 = 1.0; m.M12 = 0.0; m.M13 = 0.0; m.M14 = 0.0;
    m.M21 = 0.0; m.M22 = 1.0; m.M23 = 0.0; m.M24 = 0.0;
    m.M31 = 0.0; m.M32 = 0.0; m.M33 = 1.0; m.M34 = 0.0;
    m.OffsetX = 100; m.OffsetY = 100; m.OffsetZ = 0; m.M44 = 1.0;

    Matrix3DProjection m3dProjection = new Matrix3DProjection();
    m3dProjection.ProjectionMatrix = m;

    BeachImage.Projection = m3dProjection;

}

<Image Source="guy_by_the_beach.jpg">
    <Image.Projection>
        <Matrix3DProjection  ProjectionMatrix="2, 0, 0, 0,
                                              0, 2, 0, 0,
                                              0, 0, 1, 0,
                                              100, 100, 0, 1"/>
    </Image.Projection>
</Image>

<!-- When you click on the image, the projection is applied. -->
<Image PointerPressed="ApplyProjection" x:Name="BeachImage" Source="guy_by_the_beach.jpg" 
       Width="200"/>

private void ApplyProjection(Object sender, PointerRoutedEventArgs e)
{
    // Translate the image along the negative Z-axis such that it occupies 50% of the
    // vertical field of view.
    double fovY = Math.PI / 2.0;
    double translationZ = -BeachImage.ActualHeight / Math.Tan(fovY / 2.0);
    double theta = 20.0 * Math.PI / 180.0;

    // You can create a 3D effect by creating a number of simple 
    // tranformation Matrix3D matrices and then multiply them together.
    Matrix3D centerImageAtOrigin = TranslationTransform(
             -BeachImage.ActualWidth / 2.0,
             -BeachImage.ActualHeight / 2.0, 0);
    Matrix3D invertYAxis = CreateScaleTransform(1.0, -1.0, 1.0);
    Matrix3D rotateAboutY = RotateYTransform(theta);
    Matrix3D translateAwayFromCamera = TranslationTransform(0, 0, translationZ);
    Matrix3D perspective = PerspectiveTransformFovRH(fovY,
            LayoutRoot.ActualWidth / LayoutRoot.ActualHeight,   // aspect ratio
            1.0,                                                // near plane
            1000.0);                                            // far plane
    Matrix3D viewport = ViewportTransform(LayoutRoot.ActualWidth, LayoutRoot.ActualHeight);

    Matrix3D m = Matrix3DHelper.Multiply(centerImageAtOrigin,invertYAxis);
    m = Matrix3D.Multiply(m ,rotateAboutY);
    m = Matrix3D.Multiply(m,translateAwayFromCamera);
    m = Matrix3D.Multiply(m,perspective);
    m = Matrix3D.Multiply(m,viewport);

    Matrix3DProjection m3dProjection = new Matrix3DProjection();
    m3dProjection.ProjectionMatrix = m;

    BeachImage.Projection = m3dProjection;
}

private Matrix3D TranslationTransform(double tx, double ty, double tz)
{
    Matrix3D m = new Matrix3D();

    m.M11 = 1.0; m.M12 = 0.0; m.M13 = 0.0; m.M14 = 0.0;
    m.M21 = 0.0; m.M22 = 1.0; m.M23 = 0.0; m.M24 = 0.0;
    m.M31 = 0.0; m.M32 = 0.0; m.M33 = 1.0; m.M34 = 0.0;
    m.OffsetX = tx; m.OffsetY = ty; m.OffsetZ = tz; m.M44 = 1.0;

    return m;
}

private Matrix3D CreateScaleTransform(double sx, double sy, double sz)
{
    Matrix3D m = new Matrix3D();

    m.M11 = sx; m.M12 = 0.0; m.M13 = 0.0; m.M14 = 0.0;
    m.M21 = 0.0; m.M22 = sy; m.M23 = 0.0; m.M24 = 0.0;
    m.M31 = 0.0; m.M32 = 0.0; m.M33 = sz; m.M34 = 0.0;
    m.OffsetX = 0.0; m.OffsetY = 0.0; m.OffsetZ = 0.0; m.M44 = 1.0;

    return m;
}

private Matrix3D RotateYTransform(double theta)
{
    double sin = Math.Sin(theta);
    double cos = Math.Cos(theta);

    Matrix3D m = new Matrix3D();

    m.M11 = cos; m.M12 = 0.0; m.M13 = -sin; m.M14 = 0.0;
    m.M21 = 0.0; m.M22 = 1.0; m.M23 = 0.0; m.M24 = 0.0;
    m.M31 = sin; m.M32 = 0.0; m.M33 = cos; m.M34 = 0.0;
    m.OffsetX = 0.0; m.OffsetY = 0.0; m.OffsetZ = 0.0; m.M44 = 1.0;

    return m;
}

private Matrix3D RotateZTransform(double theta)
{
    double cos = Math.Cos(theta);
    double sin = Math.Sin(theta);

    Matrix3D m = new Matrix3D();
    m.M11 = cos; m.M12 = sin; m.M13 = 0.0; m.M14 = 0.0;
    m.M21 = -sin; m.M22 = cos; m.M23 = 0.0; m.M24 = 0.0;
    m.M31 = 0.0; m.M32 = 0.0; m.M33 = 1.0; m.M34 = 0.0;
    m.OffsetX = 0.0; m.OffsetY = 0.0; m.OffsetZ = 0.0; m.M44 = 1.0;
    return m;
}

private Matrix3D PerspectiveTransformFovRH(double fieldOfViewY, double aspectRatio, double zNearPlane, double zFarPlane)
{
    double height = 1.0 / Math.Tan(fieldOfViewY / 2.0);
    double width = height / aspectRatio;
    double d = zNearPlane - zFarPlane;

    Matrix3D m = new Matrix3D();
    m.M11 = width; m.M12 = 0; m.M13 = 0; m.M14 = 0;
    m.M21 = 0; m.M22 = height; m.M23 = 0; m.M24 = 0;
    m.M31 = 0; m.M32 = 0; m.M33 = zFarPlane / d; m.M34 = -1;
    m.OffsetX = 0; m.OffsetY = 0; m.OffsetZ = zNearPlane * zFarPlane / d; m.M44 = 0;

    return m;
}

private Matrix3D ViewportTransform(double width, double height)
{
    Matrix3D m = new Matrix3D();

    m.M11 = width / 2.0; m.M12 = 0.0; m.M13 = 0.0; m.M14 = 0.0;
    m.M21 = 0.0; m.M22 = -height / 2.0; m.M23 = 0.0; m.M24 = 0.0;
    m.M31 = 0.0; m.M32 = 0.0; m.M33 = 1.0; m.M34 = 0.0;
    m.OffsetX = width / 2.0; m.OffsetY = height / 2.0; m.OffsetZ = 0.0; m.M44 = 1.0;

    return m;
}

備註

您可以將 Matrix3DProjection 和 Matrix3D 類型用於比 PlaneProjection 類型更複雜的半-3D 案例。 Matrix3DProjection 提供完整的 3D 轉換矩陣，以套用至任何 UIElement (您使用此矩陣作為 UIElement.Projection 属性的值) 。矩陣可讓您將任意模型轉換矩陣和透視矩陣套用至視覺元素。

建構函式

Matrix3DProjection()

初始化 Matrix3DProjection 類別的新實例。

屬性

Dispatcher	一律會在 Windows 應用程式 SDK 應用程式中傳`null`回。請改用 DispatcherQueue 。 (繼承來源 DependencyObject)
DispatcherQueue	`DispatcherQueue`取得與這個物件相關聯的。 `DispatcherQueue`表示即使程式代碼是由非UI線程起始，也可以存取 `DependencyObject` UI線程上的設備。 (繼承來源 DependencyObject)
ProjectionMatrix	取得或設定用於套用至物件的投影的 Matrix3D 。
ProjectionMatrixProperty	識別 ProjectionMatrix 相依性屬性。

方法

ClearValue(DependencyProperty)	清除相依性屬性的本機值。 (繼承來源 DependencyObject)
GetAnimationBaseValue(DependencyProperty)	傳回為相依性屬性建立的任何基底值，如果動畫未使用中，則適用此屬性。 (繼承來源 DependencyObject)
GetValue(DependencyProperty)	從 DependencyObject 傳回相依性屬性的目前有效值。 (繼承來源 DependencyObject)
ReadLocalValue(DependencyProperty)	如果已設定本機值，則傳回相依性屬性的本機值。 (繼承來源 DependencyObject)
RegisterPropertyChangedCallback(DependencyProperty, DependencyPropertyChangedCallback)	註冊通知函式，以接聽此 DependencyObject 實例上特定 DependencyProperty 的變更。 (繼承來源 DependencyObject)
SetValue(DependencyProperty, Object)	設定 DependencyObject 上相依性屬性的本機值。 (繼承來源 DependencyObject)
UnregisterPropertyChangedCallback(DependencyProperty, Int64)	取消先前透過呼叫 RegisterPropertyChangedCallback 註冊的變更通知。 (繼承來源 DependencyObject)

適用於

共用方式為

Matrix3DProjection 類別

定義

範例

備註

建構函式

屬性

方法

適用於

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意見反應

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