public override void Update(CanvasContext2D context) { context.Save(); context.BeginPath(); context.Rect(0, 0, 800, 320); context.ClosePath(); context.Clip(); float speed = -(_level.Curve * _level.Speed * 50); if (_level.Left && _level.Speed > 0) { speed += 1; } if (_level.Right && _level.Speed > 0) { speed -= 1; } UpdateExplosions(context, speed); UpdateFlak(context, speed); foreach (Cloud cloud in _clouds) { float scale = (400 - cloud.Y) / 400; cloud.X = (cloud.X - (0.3f - speed) * scale + 2400) % 2400; context.DrawImage( _cloudImage, cloud.X - 1200, cloud.Y - (_cloudImage.NaturalHeight / 2) * scale, _cloudImage.NaturalWidth * scale, _cloudImage.NaturalHeight * scale); } context.Restore(); }
private bool DrawTriangle(CanvasContext2D ctx, ImageElement im, double x0, double y0, double x1, double y1, double x2, double y2, double sx0, double sy0, double sx1, double sy1, double sx2, double sy2) { if (!Intersects(0, Width, 0, Height, x0, y0, x1, y1, x2, y2)) { return(false); } //double edgeOffset = isOutlined ? ContractionInPixels : ExpansionInPixels; //Vector2d expandedS0 = GetMiterPoint(Vector2d.Create(x0, y0), Vector2d.Create(x1, y1), Vector2d.Create(x2, y2), ExpansionInPixels); //Vector2d expandedS1 = GetMiterPoint(Vector2d.Create(x1, y1), Vector2d.Create(x0, y0), Vector2d.Create(x2, y2), ExpansionInPixels); //Vector2d expandedS2 = GetMiterPoint(Vector2d.Create(x2, y2), Vector2d.Create(x1, y1), Vector2d.Create(x0, y0), ExpansionInPixels); //Vector2d expandedS0 = MiterPoint(x0, y0, x1, y1, x2, y2); //Vector2d expandedS1 = MiterPoint(x1, y1, x0, y0, x2, y2); //Vector2d expandedS2 = MiterPoint(x2, y2, x1, y1, x0, y0); MiterPointOut(expandedS0, x0, y0, x1, y1, x2, y2, ExpansionInPixels); MiterPointOut(expandedS1, x1, y1, x0, y0, x2, y2, ExpansionInPixels); MiterPointOut(expandedS2, x2, y2, x1, y1, x0, y0, ExpansionInPixels); x0 = expandedS0.X; y0 = expandedS0.Y; x1 = expandedS1.X; y1 = expandedS1.Y; x2 = expandedS2.X; y2 = expandedS2.Y; ctx.Save(); if (RenderingOn) { ctx.BeginPath(); ctx.MoveTo(x0, y0); ctx.LineTo(x1, y1); ctx.LineTo(x2, y2); ctx.ClosePath(); ctx.Clip(); } double denom = sx0 * (sy2 - sy1) - sx1 * sy2 + sx2 * sy1 + (sx1 - sx2) * sy0; //if (denom == 0) //{ // ctx.Restore(); // return false; //} double m11 = -(sy0 * (x2 - x1) - sy1 * x2 + sy2 * x1 + (sy1 - sy2) * x0) / denom; double m12 = (sy1 * y2 + sy0 * (y1 - y2) - sy2 * y1 + (sy2 - sy1) * y0) / denom; double m21 = (sx0 * (x2 - x1) - sx1 * x2 + sx2 * x1 + (sx1 - sx2) * x0) / denom; double m22 = -(sx1 * y2 + sx0 * (y1 - y2) - sx2 * y1 + (sx2 - sx1) * y0) / denom; double dx = (sx0 * (sy2 * x1 - sy1 * x2) + sy0 * (sx1 * x2 - sx2 * x1) + (sx2 * sy1 - sx1 * sy2) * x0) / denom; double dy = (sx0 * (sy2 * y1 - sy1 * y2) + sy0 * (sx1 * y2 - sx2 * y1) + (sx2 * sy1 - sx1 * sy2) * y0) / denom; ctx.Transform(m11, m12, m21, m22, dx, dy); if (RenderingOn) { ctx.Alpha = Opacity; if (lighting < 1.0) { ctx.Alpha = 1; ctx.FillStyle = "Black"; ctx.FillRect(0, 0, Width, Height); ctx.Alpha = lighting * Opacity; } ctx.DrawImage(im, 0, 0); } ctx.Restore(); return(true); }
private bool DrawTriangle(CanvasContext2D ctx, ImageElement im, double x0, double y0, double x1, double y1, double x2, double y2, double sx0, double sy0, double sx1, double sy1, double sx2, double sy2) { bool inside; if (factor == 1.0) { inside = Intersects(0, Width, 0, Height, x0, y0, x1, y1, x2, y2); } else { hw = Width / 2; qw = hw * factor; hh = Height / 2; qh = hh * factor; inside = Intersects(hw - qw, hw + qw, hh - qh, hh + qh, x0, y0, x1, y1, x2, y2); } if (!inside) { return(false); } double edgeOffset = isOutlined ? ContractionInPixels : ExpansionInPixels; Vector2d expandedS0 = GetMiterPoint(Vector2d.Create(x0, y0), Vector2d.Create(x1, y1), Vector2d.Create(x2, y2), edgeOffset); Vector2d expandedS1 = GetMiterPoint(Vector2d.Create(x1, y1), Vector2d.Create(x0, y0), Vector2d.Create(x2, y2), edgeOffset); Vector2d expandedS2 = GetMiterPoint(Vector2d.Create(x2, y2), Vector2d.Create(x1, y1), Vector2d.Create(x0, y0), edgeOffset); x0 = expandedS0.X; y0 = expandedS0.Y; x1 = expandedS1.X; y1 = expandedS1.Y; x2 = expandedS2.X; y2 = expandedS2.Y; ctx.Save(); ctx.BeginPath(); ctx.MoveTo(x0, y0); ctx.LineTo(x1, y1); ctx.LineTo(x2, y2); ctx.ClosePath(); ctx.Clip(); double denom = sx0 * (sy2 - sy1) - sx1 * sy2 + sx2 * sy1 + (sx1 - sx2) * sy0; if (denom == 0) { ctx.Restore(); return(false); } double m11 = -(sy0 * (x2 - x1) - sy1 * x2 + sy2 * x1 + (sy1 - sy2) * x0) / denom; double m12 = (sy1 * y2 + sy0 * (y1 - y2) - sy2 * y1 + (sy2 - sy1) * y0) / denom; double m21 = (sx0 * (x2 - x1) - sx1 * x2 + sx2 * x1 + (sx1 - sx2) * x0) / denom; double m22 = -(sx1 * y2 + sx0 * (y1 - y2) - sx2 * y1 + (sx2 - sx1) * y0) / denom; double dx = (sx0 * (sy2 * x1 - sy1 * x2) + sy0 * (sx1 * x2 - sx2 * x1) + (sx2 * sy1 - sx1 * sy2) * x0) / denom; double dy = (sx0 * (sy2 * y1 - sy1 * y2) + sy0 * (sx1 * y2 - sx2 * y1) + (sx2 * sy1 - sx1 * sy2) * y0) / denom; ctx.Transform(m11, m12, m21, m22, dx, dy); ctx.DrawImage(im, 0, 0); ctx.Restore(); if (factor != 1.0) { ctx.BeginPath(); ctx.MoveTo(hw - qw, hh - qh); ctx.LineTo(hw + qw, hh - qh); ctx.LineTo(hw + qw, hh + qh); ctx.LineTo(hw - qw, hh + qh); ctx.ClosePath(); ctx.StrokeStyle = "yellow"; ctx.Stroke(); } return(true); }