@moderrkowo/jsgl/dist/utils/math/MathUtils.js

Client-side JavaScript library for creating web 2D games. Focusing at objective game.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.RandomInRange = exports.Range = exports.InvertedLerp = exports.Lerp = exports.Clamp01 = exports.Clamp = exports.IsInRange = exports.floor = void 0;
/**
 * Speedy floor faster than Math.floor(a)
 * @param a Value to floor
 * @returns The floored number
 */
function floor(a) {
    return a | a;
}
exports.floor = floor;
/**
 * Checks is number in range
 * @param a Value to check
 * @param min Minimal of range
 * @param max Maximum of range
 * @returns is number in range
 */
function IsInRange(a, min, max) {
    return a >= min && a <= max;
}
exports.IsInRange = IsInRange;
/**
 * Clamps number between min and max
 * @param a Value to clamp
 * @param min The minimum value
 * @param max The maximum value
 * @returns Clamped number
 */
function Clamp(a, min, max) {
    return Math.min(max, Math.max(min, a));
}
exports.Clamp = Clamp;
/**
 * Clamps number between 0 and 1
 * @param a Value to clamp
 * @returns Clamped01 number
 */
function Clamp01(a) {
    return Clamp(a, 0, 1);
}
exports.Clamp01 = Clamp01;
/**
 * A Lerp function returns the value between two numbers at specified decimal midpoints.
 * @param x The minimum of range
 * @param y The maximum of range
 * @param a Decimal midpoint
 * @returns Value between two numbers
 */
function Lerp(x, y, a) {
    return x * (1 - a) + y * a;
}
exports.Lerp = Lerp;
function InvertedLerp(x, y, a) {
    return Clamp01((a - x) / (y - x));
}
exports.InvertedLerp = InvertedLerp;
function Range(x1, y1, x2, y2, a) {
    return Lerp(x2, y2, InvertedLerp(x1, y1, a));
}
exports.Range = Range;
function RandomInRange(min, max) {
    return floor(Math.random() * (max - min)) + min;
}
exports.RandomInRange = RandomInRange;