/// <summary>
/// Generates a collection of frames from a sprite sheet with identical sprite sizes.
/// </summary>
/// <param name="size">The size of a single sprite.</param>
/// <param name="spritesheet">The sprite sheet to load from.</param>
/// <returns>A frame collection.</returns>
public static FrameCollection FromSpriteSheet(Texture2D spritesheet, Point size)
{
if (spritesheet == null)
{
throw new ArgumentNullException("spritesheet");
}
if (size.X <= 0 || size.Y <= 0)
{
throw new ArgumentException("The size of a sprite must be positive.");
}
FrameCollection collection = new FrameCollection();
for (int y = 0; y + size.Y <= spritesheet.Height; y += size.Y)
{
for (int x = 0; x + size.X <= spritesheet.Width; x += size.X)
{
collection.Add(new Frame(spritesheet, new Rectangle(x, y, size.X, size.Y)));
}
}
return(collection);
}
/// <summary>
/// Creates a <see cref="SpriteSheet"/>.
/// </summary>
/// <param name="position">The position of the <see cref="SpriteSheet"/>.</param>
/// <param name="batch">The <see cref="Microsoft.Xna.Framework.Graphics.SpriteBatch"/> to render to.</param>
/// <param name="frames">The collection of frames that makes up this <see cref="SpriteSheet"/>.</param>
public SpriteSheet(Vector2 position, SpriteBatch batch, IEnumerable <Frame> frames)
: base(null, position, batch)
{
if (frames == null)
{
throw new ArgumentNullException("frames");
}
_frames = new FrameCollection();
foreach (Frame frame in frames)
{
if (frame == null)
{
throw new ArgumentException("The frames array cannot contain null elements.");
}
Frames.Add(frame);
}
}
/// <summary>
/// Generates a collection of frames from a sprite sheet.
/// </summary>
/// <param name="sprites">The bounding boxes of the sprites within the sprite sheet.</param>
/// <param name="spritesheet">The sprite sheet to load from.</param>
/// <returns>A frame collection.</returns>
public static FrameCollection FromSpriteSheet(Texture2D spritesheet, params Rectangle[] sprites)
{
if (spritesheet == null)
{
throw new ArgumentNullException("spritesheet");
}
if (sprites == null)
{
throw new ArgumentNullException("sprites");
}
FrameCollection collection = new FrameCollection();
for (int i = 0; i < sprites.Length; i++)
{
collection.Add(new Frame(spritesheet, sprites[i]));
}
return(collection);
}
