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();
}
internal async Task DrawPolygonAsync(Color fillColor, Color borderColor, float borderWidth, Point[] points)
{
if (points.Length == 0)
{
return;
}
await ctx.BeginPathAsync();
await ctx.MoveToAsync(points[0].X, points[0].Y);
for (int i = 1; i < points.Length; i++)
{
await ctx.LineToAsync(points[i].X, points[i].Y);
}
await ctx.LineToAsync(points[0].X, points[0].Y);
if (fillColor != null)
{
await this.SetFillColor(fillColor);
await ctx.FillAsync();
}
if (borderColor != null)
{
await this.SetStrokeColor(borderColor);
await this.SetLineWidth(borderWidth);
await ctx.StrokeAsync();
}
}
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;
}
/// <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 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();
}
protected override async Task OnAfterRenderAsync(bool firstRender)
{
_stopwatch.Start();
if (firstRender)
{
_ctx = await _canvas.CreateCanvas2DAsync();
await _ctx.SetFillStyleAsync("green");
await _ctx.SetStrokeStyleAsync("#777777");
await _ctx.SetLineWidthAsync(1);
}
await _ctx.ClearRectAsync(0, 0, GridSize *Scale, GridSize *Scale);
await _ctx.BeginPathAsync();
for (int i = 0; i <= Scale; ++i)
{
await _ctx.MoveToAsync(GridSize *i, 0);
await _ctx.LineToAsync(GridSize *i, GridSize *Scale);
await _ctx.MoveToAsync(0, GridSize *i);
await _ctx.LineToAsync(GridSize *Scale, GridSize *i);
}
for (int y = 0; y < Scale; ++y)
{
for (int x = 0; x < Scale; ++x)
{
if (_game.GetState(x, y))
{
await _ctx.RectAsync(x *GridSize + 1, y *GridSize + 1, GridSize - 2, GridSize - 2);
}
}
}
await _ctx.StrokeAsync();
await _ctx.FillAsync();
_stopwatch.Stop();
RenderCostInMilliSecond = _stopwatch.ElapsedMilliseconds;
_stopwatch.Reset();
}