protected override void OnDrawSample(SKCanvas canvas, int width, int height)
{
canvas.Clear(SKColors.White);
var blockSize = 30;
// create the path
var path = new SKPath();
// the rect must be offset as the path uses the center
var rect = SKRect.Create(blockSize / -2, blockSize / -2, blockSize, blockSize);
path.AddRect(rect);
// move the path around: across 1 block
var offsetMatrix = SKMatrix.CreateScale(2 * blockSize, blockSize);
// each row, move across a bit / offset
offsetMatrix = SKMatrix.Concat(offsetMatrix, SKMatrix.CreateSkew(0.5f, 0));
// create the paint
var paint = new SKPaint
{
PathEffect = SKPathEffect.Create2DPath(offsetMatrix, path),
Color = SKColors.LightGray
};
// draw a rectangle
canvas.DrawRect(SKRect.Create(width + blockSize, height + blockSize), paint);
}
private void OnPaintBackground(object sender, SKPaintSurfaceEventArgs e)
{
var scale = e.Info.Width / (float)((View)sender).Width;
var blockSize = BaseBlockSize * scale;
var offsetMatrix = SKMatrix.CreateScale(2 * blockSize, blockSize);
var skewMatrix = SKMatrix.CreateSkew(0.5f, 0);
var matrix = offsetMatrix.PreConcat(skewMatrix);
using var path = new SKPath();
path.AddRect(SKRect.Create(blockSize / -2, blockSize / -2, blockSize, blockSize));
using var paint = new SKPaint
{
PathEffect = SKPathEffect.Create2DPath(matrix, path),
Color = 0xFFF0F0F0
};
var canvas = e.Surface.Canvas;
var area = SKRect.Create(e.Info.Width + blockSize, e.Info.Height + blockSize);
canvas.DrawRect(area, paint);
}