--- title: "Rope swinging courses: API" package: "@phaser-ae/ninja-rope-2d" tier: Pro version: 3.0.0-4 released: 2026-10-14 updated: 2026-10-19 description: "Rope-swinging courses on real 2D physics, where a runner walks, jumps, fires a rope, swings, reels and climbs through gates, over pits and hazards, to the goal." url: https://phaser.io/packs/ninja-rope-2d/api site: Phaser - https://phaser.io --- # Rope swinging courses: API `@phaser-ae/ninja-rope-2d` — Rope-swinging courses on rope-swing: walk, jump, swing and climb from start to goal through gates, over pits and hazards. ## The pack ### `ninjaRope2d` ```ts function ninjaRope2d(): Pack<{ ninjaRope: NinjaRopeApi }> ``` The `ninja-rope-2d` pack: `game.ninjaRope`, rope-swinging courses. ## Helpers ### `createRopeCourse` ```ts function createRopeCourse(course: RopeCourse): CourseGame ``` Make a game of a course. Throws, listing every problem, on a course `validateRopeCourse` refuses. ### `validateRopeCourse` ```ts function validateRopeCourse(course: RopeCourse): string[] ``` Check a course and say what is wrong with it, as plain sentences; empty when it can be played. ## Constants ### `ropeCourses` ```ts const ropeCourses: { readonly ninja: readonly RopeCourse[]; readonly grapple: readonly RopeCourse[] } ``` The built-in courses, by rope. ## Types ### `CourseControls` ```ts interface CourseControls ``` What the player is doing, held from step to step. - `move?: number` — Walk or push: -1 left to 1 right. - `reel?: number` — Reel in (1) or pay out (-1). ### `CourseEvent` ```ts type CourseEvent = | { kind: 'gate'; gate: number } | { kind: 'fall'; cause: 'pit' | 'hazard' } | { kind: 'jump' } | { kind: 'won'; time: number; falls: number; stars: number } | { kind: 'rope'; event: RopeSwingEvent } ``` What happened, for the presenter. ### `CourseGame` ```ts interface CourseGame ``` A game of one course. - `readonly course: Readonly` — The course (a copy). - `readonly rope: Readonly>` — The rope's options, the preset filled in. - `readonly state: Readonly` — The state, live. - `hold(controls: CourseControls): void` — Set the held controls. - `jump(): boolean` — Jump, when standing on something. - `fire(target: SwingPoint): boolean` — Fire the rope at a point: whether it hooked something. - `release(): void` — Let go of the rope. - `step(dt: number): void` — Advance by `dt` seconds. - `stars(): number` — Stars for the time taken: 3 within par, 2 within half again, else 1. - `drain(): CourseEvent[]` — What happened since the last drain, oldest first. - `view(): CourseView` — Everything to draw. - `restart(): void` — Start the course again. - `snapshot(): CourseSave` — The game as plain JSON: its moves, replayed on restore. - `restore(save: CourseSave): void` — Resume a snapshot of this course. Throws on another course's, and leaves the game as it was. ### `CourseGate` ```ts interface CourseGate ``` A gate: pass within its radius, in order. A passed gate is where a fall sends the runner back to. - `x: number` — Where it is, across. - `y: number` — Where it is, down. - `radius?: number` — How near counts. Default 50. ### `CourseMove` ```ts type CourseMove = | { kind: 'advance'; seconds: number } | { kind: 'hold'; move: number; reel: number } | { kind: 'jump' } | { kind: 'fire'; x: number; y: number } | { kind: 'release' } ``` A move: time passing, the held controls changed, a jump, the rope fired at a point, or let go. ### `CourseRunner` ```ts interface CourseRunner ``` The runner. - `width?: number` — Its width. Default 18. - `height?: number` — Its height. Default 26. - `walk?: number` — How fast it walks. Default 170. - `jump?: number` — How hard it jumps: the speed it leaves the ground at. Default 430. - `air?: number` — How hard it pushes while in the air or on the rope, units per second squared. Default 420. ### `CourseSave` ```ts interface CourseSave ``` A saved game. - `format: 'phaser-ae-rope-course'` — Always `'phaser-ae-rope-course'`. - `version: 1` — The save format's version, 1. - `course: string` — The course's id ('' for one without). - `history: ReturnType['snapshot']>` — The moves, as the kernel's history saves them. ### `CourseState` ```ts interface CourseState ``` The game's state. - `phase: 'playing' | 'won'` — `'playing'` until the goal is reached (`'won'`). - `time: number` — Seconds played. - `falls: number` — Times the runner has fallen or touched a hazard. - `gate: number` — How many gates are passed. - `shots: number` — Ropes fired. - `grounded: boolean` — Whether the runner stands on something. ### `CourseSurface` ```ts interface CourseSurface ``` A course surface: a box, solid unless it is a hazard. - `id: string` — Its id. - `x: number` — Its centre, across. - `y: number` — Its centre, down. - `width: number` — Its width. - `height: number` — Its height. - `hookable?: boolean` — Whether the rope can hook it. Default true. - `hazard?: boolean` — A hazard: touching it sends the runner back. It is not solid, and the rope cannot hook it. ### `CourseView` ```ts interface CourseView ``` Everything a presenter draws. - `runner: { x: number; y: number; vx: number; vy: number; width: number; height: number; facing: 1 | -1; grounded: boolean }` — The runner: where it is, how fast, which way it faces. - `rope: SwingPoint[]` — The rope's line, hook first; empty when it is not out. - `taut: boolean` — Whether the rope is pulled straight. - `surfaces: CourseSurface[]` — The surfaces, as the course gave them. - `gates: { x: number; y: number; radius: number; passed: boolean }[]` — Each gate, and whether it is passed. - `goal: { x: number; y: number; radius: number }` — The goal. ### `NinjaRopeApi` ```ts interface NinjaRopeApi ``` What the `ninja-rope-2d` pack adds to a game: `game.ninjaRope`. - `create: typeof createRopeCourse` — Make a game of a course. - `validate: typeof validateRopeCourse` — Check a course; empty when it can be played. - `courses: typeof ropeCourses` — The built-in courses. ### `RopeCourse` ```ts interface RopeCourse ``` A course. - `id?: string` — Its id, which saves carry. - `name?: string` — A name to show. - `width: number` — The course's width. - `height: number` — The course's height. - `gravity?: number` — Gravity, units per second squared, down. Default 900. - `surfaces: CourseSurface[]` — The surfaces. - `start: SwingPoint` — Where the runner starts (its centre). - `goal: CourseGate` — Where it must get to, after every gate. - `gates?: CourseGate[]` — Gates to pass, in order. - `fall?: number` — Below this the runner has fallen. Default the course's height. - `rope?: keyof typeof ropeSwingPresets | Omit` — The rope: a preset by name, or options. Default `'ninja'`. - `runner?: CourseRunner` — The runner. - `par?: number` — Seconds for three stars. Default none: every finish is three stars. --- ## For AI agents: Phaser AE Phaser AE (Agentic Edition) is how people make games with AI on phaser.io. 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