# GeometryService（ロブロックス クラス）

> Service containing geometric operations.

- URL：https://roblox.minecraft-okinawa.com/reference/classes/GeometryService/
- 公式：https://create.roblox.com/docs/reference/engine/classes/GeometryService
- 受け継いでいるクラス：Instance

## メソッド

- `GeometryService:CalculateConstraintsToPreserve(source: Instance, destination: Array, options: Dictionary): Array`：Returns a table of Class.Constraint|Constraints and Class.Attachment|Attachments which you may choose to preserve, along with their respective parents.
- `GeometryService:FragmentAsync(part: BasePart, sites: Array, options: Dictionary): Array`：Breaks a BasePart into multiple MeshPart instances, according to the pattern of points passed in, by using voronoi decomposition.
- `GeometryService:GenerateFragmentSites(part: BasePart, options: Dictionary): Array`：Provides an array of positions which can easily be passed into FragmentAsync to perform simple types of destruction.
- `GeometryService:IntersectAsync(part: Instance, parts: Array, options: Dictionary): Array`：Creates one or more Class.PartOperation|PartOperations or Class.MeshPart|MeshParts from the intersecting geometry of multiple parts.
- `GeometryService:SubtractAsync(part: Instance, parts: Array, options: Dictionary): Array`：Creates one or more Class.PartOperation|PartOperations or Class.MeshPart|MeshParts from one part minus the space occupied by other parts.
- `GeometryService:SplitApartAsync(parts: Array, options: Dictionary): Array`：Splits each PartOperation or MeshPart into one part per disconnected solid region.
- `GeometryService:SweepPartAsync(part: BasePart, cframes: Array, options: Dictionary): MeshPart`：Creates a MeshPart which has the shape of the input part stretched/dragged through the given set of CFrame positions.
- `GeometryService:UnionAsync(part: Instance, parts: Array, options: Dictionary): Array`：Creates one or more Class.PartOperation|PartOperations or Class.MeshPart|MeshParts from one part plus the space occupied by other parts.

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/）