public Decal(DecalPrefab prefab, float scale, Vector2 worldPosition, Hull hull, int?spriteIndex = null)
{
Prefab = prefab;
this.hull = hull;
//transform to hull-relative coordinates so we don't have to worry about the hull moving
NonClampedPosition = position = worldPosition - hull.WorldRect.Location.ToVector2();
Vector2 drawPos = position + hull.Rect.Location.ToVector2();
SpriteIndex = spriteIndex ?? Rand.Range(0, prefab.Sprites.Count, Rand.RandSync.Unsynced);
Sprite = prefab.Sprites[SpriteIndex];
Color = prefab.Color;
Rectangle drawRect = new Rectangle(
(int)(drawPos.X - Sprite.size.X / 2 * scale),
(int)(drawPos.Y + Sprite.size.Y / 2 * scale),
(int)(Sprite.size.X * scale),
(int)(Sprite.size.Y * scale));
Rectangle overFlowAmount = new Rectangle(
(int)Math.Max(hull.Rect.X - drawRect.X, 0.0f),
(int)Math.Max(drawRect.Y - hull.Rect.Y, 0.0f),
(int)Math.Max(drawRect.Right - hull.Rect.Right, 0.0f),
(int)Math.Max((hull.Rect.Y - hull.Rect.Height) - (drawRect.Y - drawRect.Height), 0.0f));
clippedSourceRect = new Rectangle(
Sprite.SourceRect.X + (int)(overFlowAmount.X / scale),
Sprite.SourceRect.Y + (int)(overFlowAmount.Y / scale),
Sprite.SourceRect.Width - (int)((overFlowAmount.X + overFlowAmount.Width) / scale),
Sprite.SourceRect.Height - (int)((overFlowAmount.Y + overFlowAmount.Height) / scale));
CenterPosition = position;
position -= new Vector2(Sprite.size.X / 2 * scale - overFlowAmount.X, -Sprite.size.Y / 2 * scale + overFlowAmount.Y);
this.Scale = scale;
foreach (BackgroundSection section in hull.GetBackgroundSectionsViaContaining(new Rectangle((int)position.X, (int)position.Y - drawRect.Height, drawRect.Width, drawRect.Height)))
{
affectedSections ??= new HashSet <BackgroundSection>();
affectedSections.Add(section);
}
}