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 DrawLineAsync(Color color, float lineWidth, int x1, int y1, int x2, int y2)
{
await this.SetStrokeColor(color);
await this.SetLineWidth(lineWidth);
await ctx.BeginPathAsync();
await ctx.MoveToAsync(x1, y1);
await ctx.LineToAsync(x2, y2);
await ctx.StrokeAsync();
}
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();
}
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 void Apply(LineNode lineNode)
{
_canvas2DContext.BeginPathAsync();
_canvas2DContext.MoveToAsync(lineNode.Start.X, lineNode.Start.Y);
_canvas2DContext.LineToAsync(lineNode.End.X, lineNode.End.Y);
_canvas2DContext.StrokeAsync();
}
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 async Task Draw(bool vertical)
{
await ResetCanvas();
if (vertical)
{
HexGridController.CanvasHeight = Height;
HexGridController.CanvasWidth = Width;
}
else
{
HexGridController.CanvasHeight = Width;
HexGridController.CanvasWidth = Height;
}
HexGridController.Diameter = Diameter;
await Canvas2DContext.SetLineWidthAsync(LineThinkness);
await Canvas2DContext.SetStrokeStyleAsync(LineColor);
for (var row = 0; row < HexGridController.Rows; row++)
{
for (var col = 0; col < HexGridController.Columns; col++)
{
await Canvas2DContext.BeginPathAsync();
var point = HexGridController.GetCoordinates(row, col)[6];
if (vertical)
{
await Canvas2DContext.MoveToAsync(point.X, point.Y);
}
else
{
await Canvas2DContext.MoveToAsync(point.Y, point.X);
}
for (var pos = 1; pos <= 6; pos++)
{
point = HexGridController.GetCoordinates(row, col)[pos];
if (vertical)
{
await Canvas2DContext.LineToAsync(point.X, point.Y);
}
else
{
await Canvas2DContext.LineToAsync(point.Y, point.X);
}
}
await Canvas2DContext.StrokeAsync();
}
}
}
/// <summary>
/// 画时针
/// </summary>
/// <param name="hour">小时</param>
/// <param name="radius">半径</param>
/// <returns></returns>
private async Task DrawHourHandAsync(int hour, double radius)
{
await _context.SaveAsync();
await _context.TranslateAsync(radius, radius);
double theta = (hour - 3) * 2 * Math.PI / 12;
await _context.RotateAsync((float)theta);
await _context.BeginPathAsync();
await _context.MoveToAsync(-15, -5);
await _context.LineToAsync(-15, 5);
await _context.LineToAsync(radius * 0.6, 1);
await _context.LineToAsync(radius * 0.6, -1);
await _context.FillAsync();
await _context.RestoreAsync();
}
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("");
}
public static async Task DrawBar(this Canvas2DContext con, int barValue, string color, int xPos, int chartHeight)
{
await con.MoveToAsync(barWidth + xPos + spaceX, chartHeight - spaceY);
await con.LineToAsync(barWidth + xPos + spaceX, chartHeight - spaceY);
await con.StrokeAsync();
int barHeight = -barValue * 2;
await con.SetFillStyleAsync(color);
await con.FillRectAsync(xPos + spaceX, chartHeight - spaceY - 1, barWidth, barHeight);
await con.FillTextAsync(barValue.ToString(), xPos + spaceX + 5, chartHeight - spaceY + barHeight - 2);
await con.SetFillStyleAsync(COLOR.Black);
}
public async ValueTask DrawLine(Vector2 from, Vector2 to, Color color)
{
var f = from + _origin.ToVector2();
var t = to + _origin.ToVector2();
await _canvas2DContext.BeginPathAsync();
await _canvas2DContext.SetStrokeStyleAsync($"rgb({color.R},{color.G},{color.B})");
await _canvas2DContext.SetLineWidthAsync(3);
await _canvas2DContext.SetLineCapAsync(LineCap.Round);
await _canvas2DContext.MoveToAsync(f.X, f.Y);
await _canvas2DContext.LineToAsync(t.X, t.Y);
await _canvas2DContext.StrokeAsync();
}