Animatroller.Framework.LogicalDevice.VirtualPixel1D.FadeToAsync C# (CSharp) Method

        public Task FadeToAsync(ISequenceInstance instance, int position, Color color, double brightness, TimeSpan duration)
        {
            if (position < 0 || position >= this.pixelCount)
                throw new ArgumentOutOfRangeException();

            if (this.color[position].GetBrightness() == 0)
            {
                this.color[position] = color;
                this.brightness[position] = 0;
            }

            if (color.GetBrightness() == 0)
            {
                color = this.color[position];
                brightness = 0;
            }

            var startColor = this.color[position];
            var endColor = color;

            double startBrightness = this.brightness[position];

            // 10 steps per second
            int steps = (int)(duration.TotalMilliseconds / 100);

            double fadePosition = 0;
            var task = Task.Factory.StartNew(() =>
                {
                    for (int i = 0; i < steps; i++)
                    {
                        double newBrightness = startBrightness + (brightness - startBrightness) * fadePosition;

                        int r = (int)(startColor.R + (endColor.R - startColor.R) * fadePosition);
                        int g = (int)(startColor.G + (endColor.G - startColor.G) * fadePosition);
                        int b = (int)(startColor.B + (endColor.B - startColor.B) * fadePosition);
                        Color newColor = Color.FromArgb(r, g, b);

                        SetColor(position, newColor, newBrightness);

                        if (instance != null)
                        {
                            instance.WaitFor(TimeSpan.FromMilliseconds(100), false);
                            if (instance.IsCancellationRequested)
                                return;
                        }
                        else
                            System.Threading.Thread.Sleep(100);

                        fadePosition += 1.0 / (steps - 1);
                    }
                });

            return task;
        }