mwg API
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    Class Projectile

    Tweens a sprite's position in a straight line, world units to world units.

    This owns position only, the same division GridMover draws for tile movement: whether the shot lands, what it does on arrival, whether it should even be fired - all of that is the caller's business, decided (with mwg/roguelike's targeting helpers, typically) before a Projectile is ever created. What is here is just "this point moves to that point over time", because a thrown potion and a wand bolt both need exactly that and nothing about the game's own arithmetic.

    import { Projectile } from '@datamoc/mw_games/two-d/render';

    declare const boltSprite: { x: number; y: number };

    const bolt = new Projectile(boltSprite, { x: 0, y: 0 }, { x: 200, y: 0 }, { speed: 400 });

    const arrived = bolt.update(1 / 60);
    console.log(bolt.progress); // small, just past 0 - one frame into the flight
    console.log(arrived); // false - not there yet
    console.log(boltSprite.x); // moved partway from 0 towards 200
    Index
    constructor
    done frame frameOffset progress
    update

    • Parameters

      • dt: number

      Returns boolean

      true the instant it arrives, so a caller can trigger impact exactly once

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