この翻訳は不完全です。英語から この記事を翻訳 してください。

これは実験段階の機能です。
この機能は複数のブラウザーで開発中の状態にあります。互換性テーブルをチェックしてください。また、実験段階の機能の構文と挙動は、仕様変更に伴い各ブラウザーの将来のバージョンで変更になる可能性があることに注意してください。

The Path2D interface of the Canvas 2D API is used to declare paths that are then later used on CanvasRenderingContext2D objects. The path methods of the CanvasRenderingContext2D interface are present on this interface as well and are allowing you to create paths that you can retain and replay as required on a canvas.

Constructors

Path2D()
Path2D constructor. Creates a new Path2D object.

Methods

Path2D.addPath()
Adds a path to the current path.
Path2D.closePath()
Causes the point of the pen to move back to the start of the current sub-path. It tries to draw a straight line from the current point to the start. If the shape has already been closed or has only one point, this function does nothing.
Path2D.moveTo()
Moves the starting point of a new sub-path to the (x, y) coordinates.
Path2D.lineTo()
Connects the last point in the subpath to the x, y coordinates with a straight line.
Path2D.bezierCurveTo()
Adds a cubic Bézier curve to the path. It requires three points. The first two points are control points and the third one is the end point. The starting point is the last point in the current path, which can be changed using moveTo() before creating the Bézier curve.
Path2D.quadraticCurveTo()
Adds a quadratic Bézier curve to the current path.
Path2D.arc()
Adds an arc to the path which is centered at (x, y) position with radius r starting at startAngle and ending at endAngle going in the given direction by anticlockwise (defaulting to clockwise).
Path2D.arcTo()
Adds an arc to the path with the given control points and radius, connected to the previous point by a straight line.
Path2D.ellipse()
Adds an ellipse to the path which is centered at (x, y) position with the radii radiusX and radiusY starting at startAngle and ending at endAngle going in the given direction by anticlockwise (defaulting to clockwise).
Path2D.rect()
Creates a path for a rectangle at position (x, y) with a size that is determined by width and height.

Specifications

Specification Status Comment
HTML Living Standard
Path2D の定義
現行の標準  

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (有) 31 (31) 未サポート (有) 未サポート
Path2D.addPath() (有) 34 (34) 未サポート (有) 未サポート
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (有) 31.0 (31) 未サポート (有) 未サポート
Path2D.addPath() (有) 34.0 (34) 未サポート (有) 未サポート

See also

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 このページの貢献者: fscholz
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