Shadows of the Knight - Episode 1

01__episode.js

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/

var inputs = readline().split(' ');
const W = parseInt(inputs[0]); // width of the building.
const H = parseInt(inputs[1]); // height of the building.
const N = parseInt(readline()); // maximum number of turns before game over.
var inputs = readline().split(' ');
const X0 = parseInt(inputs[0]);
const Y0 = parseInt(inputs[1]);

let rect = [ [0,0], [W-1,H-1] ];
let current_position = [ X0, Y0 ]; 

const jump = ( direction ) => {
    let choosen_direction = _set_direction( direction );
    _set_area( current_position, choosen_direction );
    let width  = rect[1][0] - rect[0][0];
    let height = rect[1][1] - rect[0][1];

    let actualJump = [ 
        (parseInt( width/2  ) || 1 ), 
        (parseInt( height/2 ) || 1 ) 
    ];

    current_position[0] += actualJump[0] * choosen_direction[0];
    current_position[1] += actualJump[1] * choosen_direction[1];

    return current_position;
}


const _set_direction = ( direction ) => {
    const dir_to_coord = {
        "U": [ 0,-1], 
        "UL": [-1,-1], 
        "L": [-1, 0], 
        "DL": [-1, 1], 
        "D": [ 0, 1], 
        "DR": [ 1, 1], 
        "R": [ 1, 0], 
        "UR": [ 1,-1], 
    };

    return dir_to_coord[ direction ];
}


const _set_area = ( position,direction ) => {
    let min_x, min_y, max_x, max_y;

    if ( direction[0] == 1 ) {
        min_x = position[0];
        max_x = rect[1][0];
    } else if ( direction[0] == -1 ) {
        max_x = position[0];
        min_x = rect[0][0];
    } else {
        max_x = position[0];
        min_x = position[0];
    }

    if ( direction[1] == 1 ) {
        min_y = position[1];
        max_y = rect[1][1];
    } else if ( direction[1] == -1 ) {
        max_y = position[1];
        min_y = rect[0][1];
    } else {
        max_y = position[1];
        min_y = position[1];
    }

    rect = [ [ min_x, min_y ], [ max_x, max_y ] ];
}

// game loop
while (true) {
    const bombDir = readline(); // the direction of the bombs from batman's current location (U, UR, R, DR, D, DL, L or UL)
    let window = jump( bombDir );
    console.log(`${window[0]} ${window[1]}`);
}