翻转使用SkiaSharp

Question

的SKPath我使用的是基于例如，我发现稍微修改调整大小的代码。但是，调整大小后，所有内容都会翻转。我想无论是翻转回或防止它摆在首位翻转。

这里是我的调整大小代码：

private static void ResizePath(SKPath buildingPath, IEnumerable<Room> rooms) 
{ 
    var info = new SKImageInfo(512, 600, SKImageInfo.PlatformColorType, SKAlphaType.Premul); 
    var drawSpaceRect = SKRect.Create(info.Size); 
    //I need to find the size of the path 
    var buildingPathRect = buildingPath.TightBounds; 
    //I want to find the largest rectangle that can fit on my canvas maintaining the path's aspect ratio 
    var sketchRect = drawSpaceRect.AspectFit(buildingPathRect.Size); 
    //Now I need to transform the path to draw within the sketchRect 
    //First translate original path to its own origin 
    var firstTranslateM = SKMatrix.MakeTranslation(-buildingPathRect.Left, -buildingPathRect.Top); 
    //Next handle scaling. Since I maintained aspect ratio, I should be able to use either 
    //width or height to figure out scaling factor 
    var scalingFactor = sketchRect.Width/buildingPathRect.Width; 
    var scaleM = SKMatrix.MakeScale(scalingFactor, scalingFactor); 
    //Next I need to handle translation so path is centered on canvas 
    var secondTranslateM = SKMatrix.MakeTranslation(sketchRect.Left, sketchRect.Top); 
    //Finally I need to handle transforming the path to rotate 180 degrees 
    var rotationMatrix = SKMatrix.MakeRotationDegrees(180, sketchRect.MidX, sketchRect.MidY); 
    //Now combine the translation, scaling, and rotation into a single matrix by matrix multiplication/concatentation 
    var transformM = SKMatrix.MakeIdentity(); 
    SKMatrix.PostConcat(ref transformM, firstTranslateM); 
    SKMatrix.PostConcat(ref transformM, scaleM); 
    SKMatrix.PostConcat(ref transformM, secondTranslateM); 
    SKMatrix.PostConcat(ref transformM, rotationMatrix); 
    //Now apply the transform to the path 
    foreach (var r in rooms) 
    { 
     r.Path.Transform(transformM); 
    } 
} 

这里是我想要的一个例子（忽略行号）：

撞飞到：

任何帮助，将不胜感激。

Answer 1

这种变换应该做你在找什么。术语将翻转水平或反映水平。

var Ma = new SKMatrix {Values = new float[] {-1, 0, 0, 1, 0, 0, 0, 0, 0}}; 
    pathToFlip.Transform(Ma);