arcade-physics/lib/physics/arcade/SeparateY.js

Use Arcade Physics without Phaser.

"use strict";
/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2020 Photon Storm Ltd.
 * @license      {@link https://opensource.org/licenses/MIT|MIT License}
 */
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.SeparateY = void 0;
const GetOverlapY_1 = require("./GetOverlapY");
const ProcessY = __importStar(require("./ProcessY"));
/**
 * Separates two overlapping bodies on the Y-axis (vertically).
 *
 * Separation involves moving two overlapping bodies so they don't overlap anymore and adjusting their velocities based on their mass. This is a core part of collision detection.
 *
 * The bodies won't be separated if there is no vertical overlap between them, if they are static, or if either one uses custom logic for its separation.
 *
 * @function Phaser.Physics.Arcade.SeparateY
 * @since 3.0.0
 *
 * @param {Phaser.Physics.Arcade.Body} body1 - The first Body to separate.
 * @param {Phaser.Physics.Arcade.Body} body2 - The second Body to separate.
 * @param {boolean} overlapOnly - If `true`, the bodies will only have their overlap data set and no separation will take place.
 * @param {number} bias - A value to add to the delta value during overlap checking. Used to prevent sprite tunneling.
 *
 * @return {boolean} `true` if the two bodies overlap vertically, otherwise `false`.
 */
const SeparateY = (body1, body2, overlapOnly, bias) => {
    const overlap = (0, GetOverlapY_1.GetOverlapY)(body1, body2, overlapOnly, bias);
    const body1Immovable = body1.immovable;
    const body2Immovable = body2.immovable;
    //  Can't separate two immovable bodies, or a body with its own custom separation logic
    if (overlapOnly ||
        overlap === 0 ||
        (body1Immovable && body2Immovable) ||
        body1.customSeparateY ||
        body2.customSeparateY) {
        //  return true if there was some overlap, otherwise false
        return overlap !== 0 || (body1.embedded && body2.embedded);
    }
    const blockedState = ProcessY.Set(body1, body2, overlap);
    if (!body1Immovable && !body2Immovable) {
        if (blockedState > 0) {
            return true;
        }
        return ProcessY.Check();
    }
    else if (body1Immovable) {
        ProcessY.RunImmovableBody1(blockedState);
    }
    else if (body2Immovable) {
        ProcessY.RunImmovableBody2(blockedState);
    }
    //  If we got this far then there WAS overlap, and separation is complete, so return true
    return true;
};
exports.SeparateY = SeparateY;
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