# CollisionFidelity(ロブロックス 列挙型(Enum)) > Determines behavior of the collision hitbox for MeshPart and PartOperation instances. - URL:https://roblox.minecraft-okinawa.com/reference/enums/CollisionFidelity/ - 公式:https://create.roblox.com/docs/reference/engine/enums/CollisionFidelity ## 選べる値 - Enum.CollisionFidelity.Default(0):Collision model uses a voxel-based convex-hull decomposition that is relatively fast but may not be highly accurate, especially for holes, doorways, and cavities in general. - Enum.CollisionFidelity.Hull(1):Collision model uses the convex hull of the visual mesh. - Enum.CollisionFidelity.Box(2):Collision model uses a bounding box that encompasses the visual mesh. - Enum.CollisionFidelity.PreciseConvexDecomposition(3):Collison model uses a convex-hull decomposition of the visual mesh which is computed by a variation of an algorithm called HACD. This option is the most accurate representation of collision geometry for complex objects with built-in tolerances to reduce the total number of convex-hulls by compromising on accuracy when justified. - Enum.CollisionFidelity.Tunable(4):Collision model that supports precision tuning of convex decomposition fidelity. 英語の説明とメンバー一覧:Roblox Creator Documentation(CC BY 4.0)。日本語の解説はこのサイト独自のものです。 執筆:鈴木孝昌(現役プロジェクトマネージャー/プログラミング講師)/運営:沖縄マイクラ部 プログラミングスクール「クロスウェーブ」(https://minecraft-okinawa.com/)