C#WPF复合变换问题

同时处理平移和旋转变换时存在问题。 我刚刚开始尝试构建小行星，这是我第一次编写WPF应用程序

我的玩家飞船由一个多边形对象表示，它在按键事件上执行旋转和平移

我的旋转变换按预期工作。 主要问题是，一旦我平移，然后再次尝试旋转，旋转变换将尝试围绕上一点旋转，即使其指定用于获取新的centerX和centerY坐标

平移变换似乎将多边形大致移动+50x和+50y（即使变换中使用的坐标证明并非如此），然后它将正确地沿旋转指定的方向移动

提前感谢任何人能给我的帮助

这是我的C：

public void handleRotate(KeyEventArgs e)
{

    if (e.Key == Key.Right)
    {
        this.rotate(10);
    }

    if (e.Key == Key.Left)
    {
        this.rotate(-10);
    }

}

public void handleUpDown(KeyEventArgs e)
{
    if (e.Key == Key.Up)
    {
        this.move();
    }
}

public double convertToRadians(double angle)
{
    return (Math.PI / 180) * (angle - 90);
}

public void move()
{
    double radians = convertToRadians(playerShip.getHeading());
    double xMovement = Math.Cos(radians) * 10;
    double yMovement = Math.Sin(radians) * 10;

    playerShip.setShipCenterX(xMovement += playerShip.getShipCenterX());
    playerShip.setShipCenterY(yMovement += playerShip.getShipCenterY());
    MessageBox.Show("Heading: " + playerShip.getHeading().ToString() + " centerx: " + playerShip.getShipCenterX().ToString() + " centery: " + playerShip.getShipCenterY().ToString());
    TranslateTransform translate = new TranslateTransform(xMovement, yMovement);
    theShipShape.RenderTransform = translate;

}

public void rotate(double rotation)
{
    double newHeading = playerShip.getHeading() + rotation;
    RotateTransform rotate = new RotateTransform(newHeading, playerShip.getShipCenterX(), playerShip.getShipCenterY());
    MessageBox.Show("Heading: " + newHeading.ToString() + " centerx: " + playerShip.getShipCenterX().ToString() + " centery: " + playerShip.getShipCenterY().ToString());
    theShipShape.RenderTransform = rotate;
    playerShip.setHeading(newHeading);
}

<Window x:Name="GameWindow" x:Class="AsteroidsAttempt2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">

<Canvas x:Name="GameCanvas" Focusable="True" IsEnabled="True" HorizontalAlignment="Left" Height="320" VerticalAlignment="Top" Width="517" KeyDown="GameCanvas_KeyDown"/>

</Window>

}

这是我的xaml：

public void handleRotate(KeyEventArgs e)
{

    if (e.Key == Key.Right)
    {
        this.rotate(10);
    }

    if (e.Key == Key.Left)
    {
        this.rotate(-10);
    }

}

public void handleUpDown(KeyEventArgs e)
{
    if (e.Key == Key.Up)
    {
        this.move();
    }
}

public double convertToRadians(double angle)
{
    return (Math.PI / 180) * (angle - 90);
}

public void move()
{
    double radians = convertToRadians(playerShip.getHeading());
    double xMovement = Math.Cos(radians) * 10;
    double yMovement = Math.Sin(radians) * 10;

    playerShip.setShipCenterX(xMovement += playerShip.getShipCenterX());
    playerShip.setShipCenterY(yMovement += playerShip.getShipCenterY());
    MessageBox.Show("Heading: " + playerShip.getHeading().ToString() + " centerx: " + playerShip.getShipCenterX().ToString() + " centery: " + playerShip.getShipCenterY().ToString());
    TranslateTransform translate = new TranslateTransform(xMovement, yMovement);
    theShipShape.RenderTransform = translate;

}

public void rotate(double rotation)
{
    double newHeading = playerShip.getHeading() + rotation;
    RotateTransform rotate = new RotateTransform(newHeading, playerShip.getShipCenterX(), playerShip.getShipCenterY());
    MessageBox.Show("Heading: " + newHeading.ToString() + " centerx: " + playerShip.getShipCenterX().ToString() + " centery: " + playerShip.getShipCenterY().ToString());
    theShipShape.RenderTransform = rotate;
    playerShip.setHeading(newHeading);
}

<Window x:Name="GameWindow" x:Class="AsteroidsAttempt2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">

<Canvas x:Name="GameCanvas" Focusable="True" IsEnabled="True" HorizontalAlignment="Left" Height="320" VerticalAlignment="Top" Width="517" KeyDown="GameCanvas_KeyDown"/>

</Window>

---

渲染变换在渲染时应用，不会改变对象本身的状态。如果要应用consequentive翻译，您需要的是一个TransformGroup。其中一个有一个子属性，您可以按照希望它们执行的顺序向其添加转换，这样您就可以进行翻译，然后进行rorate，然后再次翻译，等等

当然，如果他们中的许多人在儿童时期积累起来，那么计算结果可能需要一些时间。在这种情况下，您可能希望定期告诉TransformGroup给您一个TransformMatrix（如果它没有在网络上搜索某个实现的方法），然后您可以将其用作TransformGroup的唯一子级（删除以前的子级）。然后再开始添加更多的子项，如TranslateTransform等。然后，如果达到10个变换，则再次删除它们，并为它们添加等效的MatrixTransform，作为TransformGroup的第一个子项，依此类推