private void GetOneZIndexParts(Vector2 drawLocation, int spriteCount, Point renderSizePerSprite, SpritePart[] parts)
{
for (int i = 0; i < spriteCount; i++)
{
var x = i % Item.Width;
var y = i / Item.Height;
var spriteId = Item.SpriteIds[i];
var sprite = GameCollections.Sprites.GetSprite(spriteId);
var partOffset = new Vector2(renderSizePerSprite.X * x, renderSizePerSprite.Y * y);
parts[i] = new SpritePart(partOffset, sprite.SpriteSheet, sprite.Position, renderSizePerSprite); //renderSize);
parts[i].SetDrawLocation(drawLocation);
}
}
/// <summary>
/// Sprites are returned in top to bottom and left to right order, e.g. for a 2x2 part sprite:
/// <para>[top left, top right, bottom left, bottom right]</para>
/// </summary>
public SpritePart[] GetParts(Vector2 drawLocation, Point renderSize)
{
var spriteCount = Item.Height * Item.Width * Item.MaxZIndex;
//var pixelOffset = Item.BlendFrames - Constants.SpriteWidth;
var renderSizePerSprite = new Point(renderSize.X / Item.Width, renderSize.Y / Item.Height);
var parts = new SpritePart[spriteCount];
if (Item.MaxZIndex > 1)
{
GetMultiZIndexParts(drawLocation, spriteCount, renderSizePerSprite, parts);
}
else
{
GetOneZIndexParts(drawLocation, spriteCount, renderSizePerSprite, parts);
}
return(parts);
}
private void GetMultiZIndexParts(Vector2 drawLocation, int spriteCount, Point renderSizePerSprite, SpritePart[] parts)
{
var itemsPerZIndex = Item.Width * Item.Height;
var c = spriteCount - 1;
var s = 0;
for (int z = 0; z < Item.MaxZIndex; z++)
{
for (int i = 0; i < itemsPerZIndex; i++)
{
var x = i % Item.Width;
var y = i / Item.Height;
var spriteId = Item.SpriteIds[s];
var sprite = GameCollections.Sprites.GetSprite(spriteId);
var partOffset = new Vector2(renderSizePerSprite.X * x, renderSizePerSprite.Y * y);
parts[c] = new SpritePart(partOffset, sprite.SpriteSheet, sprite.Position, renderSizePerSprite);
parts[c].SetDrawLocation(drawLocation);
c--;
s++;
}
}
}
