/// <summary>
/// Creates a new SnowDrift to fit the indicated screen size.
/// </summary>
/// <param name="screenSize">Size of the screen to fill with snowflakes.</param>
public SnowDrift(Size screenSize)
{
// Add in enough room so that snowflakes can drift off screen without just flashing away
screenSize.Width += (int)SnowFlake.FLAKE_SIZES.Max() * 2;
screenSize.Height += (int)SnowFlake.FLAKE_SIZES.Max() * 2;
this.screenSize = screenSize;
// Create a black and white buffer based on the adjusted screen sized
nextBuffer = new Interactive8BitImage(screenSize.Width,
screenSize.Height,
System.Drawing.Imaging.PixelFormat.Format8bppIndexed);
nextBuffer.SetAlpha(byte.MaxValue);
renderedScene = new Interactive8BitImage(screenSize.Width,
screenSize.Height,
System.Drawing.Imaging.PixelFormat.Format8bppIndexed);
renderedScene.SetAlpha(byte.MaxValue);
// Create the wind variations
generalDirection = new Vector(Random.Float(-3.5f, 3.5f), Random.Float(1, 2.5f));
Vector variance = new Vector(8, 3);
windVariations = new WindField[60];
for (int i = 0; i < windVariations.Length; i++)
{
windVariations[i] = new WindField(screenSize.Width, screenSize.Height, generalDirection, variance, new Size(15, 15));
}
snowflakes = new HashSet <SnowFlake>(Properties.Settings.Default.MaximumNumberOfFlakes);
}
/// <summary>
/// Creates a new snowflake.
/// </summary>
/// <param name="position">New position for the snowflake to be located at.</param>
/// <param name="velocity">New direction and speed for the snowflake to be moving.</param>
/// <param name="inertia">Inertia or how heavy teh snowflake is and resistant to changing direction.</param>
/// <param name="activeField">Wiendfield that is actively blowing this snowflake.</param>
/// <param name="flakeSize">Size of this flake.</param>
public SnowFlake(Vector position, Vector velocity, short inertia, WindField activeField, short flakeSize)
{
// Initialize this snowfalke
this.size = flakeSize;
ReInit(position, velocity, inertia);
this.activeWindField = activeField;
// Create the snowflake trail
for (int i = 0; i < Properties.Settings.Default.TrailLength; i++)
{
trail.AddLast(new Point((int)position.x, (int)position.y));
}
}
