public TerrainSpriteLayer(World world, WorldRenderer wr, Sheet sheet, BlendMode blendMode, PaletteReference palette, bool restrictToBounds)
{
worldRenderer = wr;
this.restrictToBounds = restrictToBounds;
Sheet = sheet;
BlendMode = blendMode;
this.palette = palette;
map = world.Map;
rowStride = 6 * map.MapSize.X;
vertices = new Vertex[rowStride * map.MapSize.Y];
vertexBuffer = Game.Renderer.Device.CreateVertexBuffer(vertices.Length);
emptySprite = new Sprite(sheet, Rectangle.Empty, TextureChannel.Alpha);
wr.PaletteInvalidated += UpdatePaletteIndices;
}