WPF翻转动画

转载

mob604756ea03d0 2013-04-11 09:50:00

文章标签 3d 2d xml 用户控件 microsoft 文章分类 运维

小丫头比较调皮，为了做个东东来哄一下小丫头，我想到了做一个简单的三维翻转动画。在登录QQ 2013 的时候，我看到登录窗口也有类似的动画。

在WPF中要翻转对象，估计是得用三维变换，所以我用到了AxisAngleRotation3D，让图形绕着Z轴来旋转。

先看看效果。

是的，就是这样的效果，在XAML中，由于涉及三维图形，我先做了两个用户控件，作为正面和背面，然后让它旋转。

设计完用户控件后，就在主窗口上放一个Viewport3D控件，这个是必须的，它是三维模型的容器，如果不用就不知道怎么弄出三维图形来了。具体请看下面的XAML：

<Window x:Class="翻转.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="420" Width="650"
        xmlns:local="clr-namespace:翻转"
        WindowStyle="None"
        ResizeMode="NoResize"
        AllowsTransparency="True"
        Background="Transparent"
        WindowStartupLocation="CenterScreen">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="auto"/>
        </Grid.RowDefinitions>
        <Viewport3D Grid.Row="0" Margin="3">
            <Viewport3D.Camera>
                <PerspectiveCamera Position="0 0 800" LookDirection="0 0 -1" NearPlaneDistance="100"/>
            </Viewport3D.Camera>
            <Viewport3D.Children>
                <ContainerUIElement3D>
                    <Viewport2DVisual3D>
                        <Viewport2DVisual3D.Geometry>
                            <MeshGeometry3D Positions="-200 150 0  -200 -150 0  200 -150 0  200 150 0" TriangleIndices="0 1 2  0 2 3" TextureCoordinates="0 0  0 1  1 1  1 0"/>
                        </Viewport2DVisual3D.Geometry>
                        <Viewport2DVisual3D.Material>
                            <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"/>
                        </Viewport2DVisual3D.Material>
                        <Viewport2DVisual3D.Visual>
                            <local:UcSample1 Width="400" Height="300"/>
                        </Viewport2DVisual3D.Visual>
                    </Viewport2DVisual3D>
                    <Viewport2DVisual3D>
                        <Viewport2DVisual3D.Geometry>
                            <MeshGeometry3D Positions="200 150 0  200 -150 0  -200 -150 0  -200 150 0" TriangleIndices="0 1 2  0 2 3" TextureCoordinates="0 0  0 1  1 1  1 0"/>
                        </Viewport2DVisual3D.Geometry>
                        <Viewport2DVisual3D.Material>
                            <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"/>
                        </Viewport2DVisual3D.Material>
                        <Viewport2DVisual3D.Visual>
                            <local:UcSample2 Width="400" Height="300"/>
                        </Viewport2DVisual3D.Visual>
                    </Viewport2DVisual3D>
                    <!-- 三维变换 -->
                    <ContainerUIElement3D.Transform>
                        <RotateTransform3D CenterX="0.5" CenterY="0.5" CenterZ="0.5">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D x:Name="axr" Angle="0" Axis="0 1 0"/>
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                    </ContainerUIElement3D.Transform>
                </ContainerUIElement3D>
                <ModelVisual3D>
                    <ModelVisual3D.Content>
                        <DirectionalLight Color="Transparent"/>
                    </ModelVisual3D.Content>
                </ModelVisual3D>
            </Viewport3D.Children>
        </Viewport3D>
        <StackPanel Grid.Row="1" Margin="0,5,0,6" Orientation="Horizontal" HorizontalAlignment="Center">
            <Button Padding="25,5" Content="向前" Click="OnClick"/> 
            <Button Padding="25,5" Content="向后" Click="OnClick" Margin="12,0,0,0"/>
            <Button Padding="25,5" Content="关闭" Click="OnClick" Margin="12,0,0,0"/>
        </StackPanel>
    </Grid>
</Window>

里面还有几个按钮，我是通过单击按钮来控制动画的，所以，后面还要写必要的处理代码，生成动画。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Media.Media3D;
using System.Windows.Media.Animation;

namespace 翻转
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void OnClick(object sender, RoutedEventArgs e)
        {
            Button btn = e.OriginalSource as Button;
            if (btn != null)
            {
                string s = btn.Content.ToString();
                if (s == "关闭")
                {
                    this.Close();
                }
                DoubleAnimation da = new DoubleAnimation();
                da.Duration = new Duration(TimeSpan.FromSeconds(1));
                if (s == "向前")
                {
                    da.To = 0d;
                }
                else if (s == "向后")
                {
                    da.To = 180d;
                }
                this.axr.BeginAnimation(AxisAngleRotation3D.AngleProperty, da);
            }
        }
    }
}