Avilka Jump Plugin

//=============================================================================
// AvilkaJump.js v1.0
//=============================================================================
/*:
 * @plugindesc Allows the character to jump.
 * <id:Avilka Jump>
 * @author Drykul
 *
 * @param Disable Jumping
 * @desc If this switch is set to true, jumping will not be enabled.
 * @default 20
 *
 * @param Jump Key
 * @desc The button to press for jumping.                            alt, control, up, shift, etc
 * @default 'alt'
 *
 * @param Jump Height
 * @desc The maximum height of jump in pixels                        Default: 240
 * @default 240
 *
 * @param Regular Movement Speed
 * @desc Normal movement speed for the player.                       Default: 4.5
 * @default 4.5
 *
 * @param Jump Speed
 * @desc How fast movement is while jumping.                         Default: 6.0
 * @default 6.0
 *
 * @param Fall Speed
 * @desc How fast movement is while falling.                         Default: 6.0
 * @default 6.0
 *
 * @help
 * ======== INSTALLING ========
 * Enable plugin in the plugin manager. On the first map where player controls
 * are active, have an event run the following code in a script command:
 *
 *    $dryPhysics.gravityEnabled = true
 *    $dryPhysics.controlsEnabled = true
 *
 * If at any time you want to temporarily suspend jumping ability, just toggle
 * the switch set in the plugin manager settings for this plugin. If you want
 * to disable controls, just run a script command as follows:
 *
 *    $dryPhysics.controlsEnabled = false
 *
 * !!!!!!!!!!!!!!!!!!!!!!!!!!!!! IMPORTANT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 *
 * Setting jump speed or fall speed anything higher than 6.0 causes problems
 * with collision detection.
 *
 *!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 *
 * If you have any bugs to report, requests, or questions you can contact me
 * at drykul(at)cloud9studios.net. I'm also on www.rpgmakerweb.com and
 * www.rpgmakervxace.net as shaynec1981 as well as www.rpgmakermv.co as drykul.
 *
 * No credit is necessary for use of this script in either free
 * or commercial projects. Just shoot me a line and let me know if it was
 * worth your time! :)
 *
 * // CHANGELOG //
 * 2-8-17 - Version 1.0 complete
 */
// Set up plugin parameters
var scriptParameters = $plugins.filter(function (p) {
        return p.description.contains("<id:Avilka Jump>")
    })[0].parameters
    // Set up global namespace
var $dryPhysics = {
    controlsEnabled: false
    , gravityEnabled: false
    , isFalling: false
    , isJumping: false
    , jumpEnd: 0
    , disableSwitch: scriptParameters['Disable Jumping']
    , jumpKey: scriptParameters['Jump Key']
    , jumpHeight: parseFloat(scriptParameters['Jump Height'])
    , moveSpeed: parseFloat(scriptParameters['Regular Movement Speed'])
    , jumpSpeed: parseFloat(scriptParameters['Jump Speed'])
    , fallSpeed: parseFloat(scriptParameters['Fall Speed'])
};
var aliasSceneMapUpdate = Scene_Map.prototype.update;
Scene_Map.prototype.update = function () {
    aliasSceneMapUpdate.call(this);
    if ($dryPhysics.isJumping == false && $dryPhysics.isFalling == false) {
        $gamePlayer._moveSpeed = $dryPhysics.moveSpeed;
    }
    if ($dryPhysics.isJumping) {
        if ($gamePlayer.canPass($gamePlayer._realX, $gamePlayer._realY, 8) == false) {
            $dryPhysics.isJumping = false;
            $dryPhysics.isFalling = true;
        }
        else {
            $gamePlayer._moveSpeed = $dryPhysics.jumpSpeed;
            $gamePlayer._py -= ($dryPhysics.jumpSpeed + 2);
            jumpEndCheck();
        }
    }
    if ($dryPhysics.gravityEnabled == true) {
        gravityCheck();
    }
    if ($dryPhysics.controlsEnabled == true) {
        keyCheck();
    }
};

function jumpEndCheck() {
    if ($gamePlayer._py == $dryPhysics.jumpEnd) {
        $dryPhysics.isJumping = false;
        $dryPhysics.isFalling = true;
    }
};

function gravityCheck() {
    if ($dryPhysics.isJumping == false && $gamePlayer.canPass($gamePlayer.x, $gamePlayer.y, 2)) {
        $dryPhysics.isFalling = true;
        $gamePlayer._moveSpeed = $dryPhysics.fallSpeed;
        $gamePlayer._py += ($dryPhysics.fallSpeed + 2);
    }
    else {
        $dryPhysics.isFalling = false;
    }
};

function keyCheck() {
    if ($gameSwitches.value($dryPhysics.disableSwitch) === false) {
        if ($dryPhysics.isJumping == false && $dryPhysics.isFalling == false) {
            $gamePlayer._directionFix = false;
            if ($gamePlayer._direction == 2) {
                $gamePlayer._direction = 6;
            }
            if ($gamePlayer._direction == 8) {
                $gamePlayer._direction = 4;
            }
            if (Input.isTriggered($dryPhysics.jumpKey)) {
                if ($gamePlayer.canPass($gamePlayer.x, $gamePlayer.y, 8)) {
                    $dryPhysics.isJumping = true;
                    $dryPhysics.jumpEnd = clone($gamePlayer._py);
                    $dryPhysics.jumpEnd -= $dryPhysics.jumpHeight;
                    $gamePlayer._directionFix = true;
                    if ($gamePlayer._direction == 6) {
                        $gamePlayer._direction = 2;
                    }
                    else if ($gamePlayer._direction == 4) {
                        $gamePlayer._direction = 8;
                    }
                }
            }
        }
    }
    if (($dryPhysics.isJumping || $dryPhysics.isFalling) && Input.isPressed('left') && $gamePlayer.canPass($gamePlayer.x, $gamePlayer.y, 4)) {
        $gamePlayer._direction = 8;
        $gamePlayer._px -= 4;
    }
    if (($dryPhysics.isJumping || $dryPhysics.isFalling) && Input.isPressed('right') && $gamePlayer.canPass($gamePlayer.x, $gamePlayer.y, 6)) {
        $gamePlayer._direction = 2;
        $gamePlayer._px += 4;
    }
}

function clone(obj) {
    // Handle the 3 simple types, and null or undefined
    if (null == obj || "object" != typeof obj) return obj;
    // Handle Date
    if (obj instanceof Date) {
        var copy = new Date();
        copy.setTime(obj.getTime());
        return copy;
    }
    // Handle Array
    if (obj instanceof Array) {
        var copy = [];
        for (var i = 0, len = obj.length; i < len; i++) {
            copy[i] = clone(obj[i]);
        }
        return copy;
    }
    // Handle Object
    if (obj instanceof Object) {
        var copy = {};
        for (var attr in obj) {
            if (obj.hasOwnProperty(attr)) copy[attr] = clone(obj[attr]);
        }
        return copy;
    }
    throw new Error("Unable to copy obj! Its type isn't supported.");
};
Input.keyMapper = {
    9: 'tab', // tab
    13: 'ok', // enter
    16: 'shift', // shift
    17: 'control', // control
    18: 'alt', // alt
    27: 'escape', // escape
    32: 'ok', // space
    33: 'pageup', // pageup
    34: 'pagedown', // pagedown
    37: 'left', // left arrow
    38: 'up', // up arrow
    39: 'right', // right arrow
    40: 'down', // down arrow
    45: 'escape', // insert
    81: 'pageup', // Q
    87: 'pagedown', // W
    88: 'escape', // X
    90: 'ok', // Z
    96: 'escape', // numpad 0
    98: 'down', // numpad 2
    100: 'left', // numpad 4
    102: 'right', // numpad 6
    104: 'up', // numpad 8
    120: 'debug', // F9
    121: 'f10' // F10
};
/**
 * @static
 * @method _signX
 * @private
 */
Input._signX = function () {
    var x = 0;
    if (this.isPressed('left') && $dryPhysics.controlsEnabled) {
        x--;
    }
    if (this.isPressed('right') && $dryPhysics.controlsEnabled) {
        x++;
    }
    return x;
};