public async void DrawCurveControlLines(Canvas2DContext ctx, BezierCurve curve)
{
await ctx.BeginPathAsync();
await ctx.MoveToAsync(curve.ControlPoint1.X, curve.ControlPoint1.Y);
await ctx.LineToAsync(curve.StartPoint.X, curve.StartPoint.Y);
//await ctx.SetStrokeStyleAsync("red");
await ctx.StrokeAsync();
await ctx.BeginPathAsync();
//await ctx.SetFillStyleAsync("yellow");
await ctx.ArcAsync(curve.ControlPoint1.X, curve.ControlPoint1.Y, 5, 0, Math.PI * 2);
await ctx.FillAsync();
await ctx.BeginPathAsync();
await ctx.MoveToAsync(curve.ControlPoint2.X, curve.ControlPoint2.Y);
await ctx.LineToAsync(curve.EndPoint.X, curve.EndPoint.Y);
//await ctx.SetStrokeStyleAsync("red");
await ctx.StrokeAsync();
await ctx.BeginPathAsync();
// await ctx.SetFillStyleAsync("yellow");
await ctx.ArcAsync(curve.ControlPoint2.X, curve.ControlPoint2.Y, 5, 0, Math.PI * 2);
await ctx.FillAsync();
}
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 override async void Draw(Canvas2DContext batch)
{
await batch.SetFillStyleAsync("green");
await batch.ArcAsync(95, 50, 40, 0, 2 *Math.PI);
await batch.StrokeAsync();
}
public override async Task Draw(Canvas2DContext context)
{
await context.BeginPathAsync();
await context.ArcAsync(Position.X, Position.Y, Size / 2, 0, 2 *Math.PI);
await context.SetFillStyleAsync("blue");
await context.FillAsync();
}
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 void DrawPathPoints(Canvas2DContext ctx, List <PointF> pathpoints)
{
Utils.dOut("DrawPathPoints", pathpoints.Count);
foreach (var point in pathpoints)
{
await ctx.BeginPathAsync();
await ctx.ArcAsync(point.X, point.Y, 2, 0, Math.PI * 2);
await ctx.FillAsync();
}
}
public async void DrawGrid(Canvas2DContext ctx)
{
var enemygrid = new EnemyGrid();
await ctx.BeginPathAsync();
enemygrid.GridPoints.Where(a => a.Row == 1).ToList().ForEach(async a => {
await ctx.ArcAsync(a.Point.X, a.Point.Y, 5, 0, Math.PI * 2);
});
await ctx.FillAsync();
await ctx.BeginPathAsync();
enemygrid.GridPoints.Where(a => a.Row == 2).ToList().ForEach(async a => {
await ctx.ArcAsync(a.Point.X, a.Point.Y, 5, 0, Math.PI * 2);
});
await ctx.FillAsync();
await ctx.BeginPathAsync();
enemygrid.GridPoints.Where(a => a.Row == 3).ToList().ForEach(async a => {
await ctx.ArcAsync(a.Point.X, a.Point.Y, 5, 0, Math.PI * 2);
});
await ctx.FillAsync();
await ctx.BeginPathAsync();
enemygrid.GridPoints.Where(a => a.Row == 4).ToList().ForEach(async a => {
await ctx.ArcAsync(a.Point.X, a.Point.Y, 5, 0, Math.PI * 2);
});
await ctx.FillAsync();
await ctx.BeginPathAsync();
enemygrid.GridPoints.Where(a => a.Row == 5).ToList().ForEach(async a => {
await ctx.ArcAsync(a.Point.X, a.Point.Y, 5, 0, Math.PI * 2);
});
await ctx.FillAsync();
}
/// <summary>
/// 画表盘圆
///</summary>
///<param name="strokeStyle"></param>
///<param name="radius">半径</param>
///<param name="fillStyle">填充色</param>
/// <returns></returns>
private async Task DrawCicleAsync(string strokeStyle, double radius, string fillStyle)
{
await _context.SaveAsync();
await _context.TranslateAsync(radius, radius);
await _context.BeginPathAsync();
await _context.SetStrokeStyleAsync(strokeStyle);
await _context.ArcAsync(0, 0, radius, 0, 2 *Math.PI, true);
await _context.SetFillStyleAsync(fillStyle);
await _context.FillAsync();
await _context.RestoreAsync();
}
public void Apply(ArcNode arcNode)
{
_canvas2DContext.ArcAsync(arcNode.Position.X, arcNode.Position.Y, arcNode.Radius, arcNode.StartAngle,
arcNode.EndAngle, arcNode.IsCounterClockwise);
}