https://learn.microsoft.com/dotnet/api/skiasharp.skcanvas.clippath canvas.Clear(SKColors.Transparent);// create the circle for the picturevarpath =newSKPath(); path.AddCircle(image.Width /2, image.Height /2, image.Width /2-1f);// tell the canvas not to draw outside the circlecanvas.Cli...
除DrawCircle方法外,SKanvas还定义了两个绘制椭圆的DrawOval方法。 椭圆由两个半径而不是单个半径定义。 这些被称为长半径和短半径。 DrawOval方法绘制一个椭圆,其两个半径平行于X和Y轴。 (如果需要绘制不与X和Y轴平行的轴的椭圆,则可以使用如《旋转变换》一文中讨论的旋转变换或如《绘制弧的三种方式》中所讨论...
在Xamarin.Forms页面中使用自定义的SkiaSharp视图,并将其居中对齐。 代码语言:csharp 复制 publicclassMainPage:ContentPage{publicMainPage(){CircleViewcircleView=newCircleView();// 设置布局参数,使视图居中对齐circleView.HorizontalOptions=LayoutOptions.Center;circleView.VerticalOptions=LayoutOptions.Center;Content=n...
} SKPoint center =newSKPoint(info.Rect.MidX, info.Rect.MidY);// Create sweep gradient based on center of canvaspaint.Shader = SKShader.CreateSweepGradient(center, colors,null);// Draw a circle with a wide lineconstintstrokeWidth =50; paint.Style = SKPaintStyle.Stroke; paint.StrokeWidth =...
circle.Radius,paint); if(circle.X+circle.VelocityX+circle.Radius>Width||circle.X+circle.VelocityX-circle.Radius<0) { circle.VelocityX=-circle.VelocityX; } if(circle.Y+circle.VelocityY+circle.Radius>Height||circle.Y+circle.VelocityY-circle.Radius<0) { circle.VelocityY=-circle.VelocityY; }...
(1 - t) : 1))); canvas.DrawCircle(center.X, center.Y, radius, paint); } } } 結果是,當等於 0 等於 1 時 tt ,影像看起來會相同,而圓形似乎會永遠繼續展開:相關連結SkiaSharp API SkiaSharpFormsDemos (範例) 其他資源 文件 與 整合 Xamarin.Forms - Xamarin 本文說明如何建立 SkiaSharp 圖形,...
canvas.DrawCircle(center, radius, paint); } } } 假设画布的宽度和高度最小值为 1000,这意味着rainbowWidth值为 250。outerRadius和innerRadius值分别设置为 1000 和 750。 这些值用于计算positions数组;八个值的范围为 0.75f 到 1。radius值用于画圆。 值 875 表示 250 像素笔划宽度在 750 ...
(pen, x, y, width, height); } private static void DrawCircle(Graphics g, int x, int y, int radius) { GdiPen pen = new GdiPen(Color.Black, 2); g.DrawEllipse(pen, x - radius, y - radius, radius * 2, radius * 2); } private static void DrawTriangle(Graphics g, int x, ...
Color = circle.Color, Style = SKPaintStyle.Fill, IsAntialias = true, StrokeWidth = 1 }; canvas.DrawCircle(circle.X, circle.Y, circle.Radius, paint); if (circle.X + circle.VelocityX + circle.Radius > Width || circle.X + circle.VelocityX - circle.Radius < 0) ...
void OnCanvasViewPaintSurface(object sender, SKPaintSurfaceEventArgs args) { SKImageInfo info = args.Info; SKSurface surface = args.Surface; SKCanvas canvas = surface.Canvas; canvas.Clear(); using (SKPath circlePath = new SKPath()) { circlePath.AddCircle(info.Width / 2, info.Height / 2,...