private async Task TraceLineAsync(double x, double y)
{
if (_lastX is not null && _lastY is not null)
{
await _canvas2DContext.SetLineWidthAsync(LineWidth);
await _canvas2DContext.BeginPathAsync();
await _canvas2DContext.MoveToAsync(_lastX.Value, _lastY.Value);
await _canvas2DContext.LineToAsync(x, y);
await _canvas2DContext.StrokeAsync();
}
await _canvas2DContext.BeginPathAsync();
await _canvas2DContext.ArcAsync(x, y, PointSize, 0, Radius, anticlockwise : true);
await _canvas2DContext.ClosePathAsync();
await _canvas2DContext.FillAsync();
_lastX = x;
_lastY = y;
}
public async Task Draw(Canvas2DContext context)
{
await Body[currentIndex].Draw(context);
await Head[currentIndex].Draw(context);
await context.BeginPathAsync();
await context.StrokeRectAsync(Head[currentIndex].Position.X - Head[currentIndex].ScaledWidth / 2, Head[currentIndex].Position.Y - Head[currentIndex].ScaledHeight / 2, Head[currentIndex].ScaledWidth, Head[currentIndex].ScaledHeight + Body[currentIndex].SourceRectangle.Height *scale.Y);
await context.ClosePathAsync();
}
private async Task DrawEdgeLine(RenderEdge edge)
{
await _context.BeginPathAsync();
await _context.MoveToAsync(edge.From.X, edge.From.Y);
await _context.LineToAsync(edge.To.X, edge.To.Y);
await _context.ClosePathAsync();
await _context.StrokeAsync();
}
public static async Task DrawOn(this IDisplayable element, Canvas2DContext context)
{
await context.BeginPathAsync();
await context.ArcAsync(element.Position.X, element.Position.Y, element.Size / 2, 0, Math.PI * 2);
await context.SetFillStyleAsync(element.Color);
await context.FillAsync();
await context.ClosePathAsync();
}
public async ValueTask DrawLine(int x1, int y1, int x2, int y2, string color)
{
await _canvas.SetStrokeStyleAsync(color);
await _canvas.BeginPathAsync();
await _canvas.MoveToAsync(x1, y1);
await _canvas.LineToAsync(x2, y2);
await _canvas.ClosePathAsync();
await _canvas.StrokeAsync();
await _canvas.SetStrokeStyleAsync("");
}