34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
/**
|
|
* Generates a random integer between min and max (inclusive)
|
|
* @param {number} min
|
|
* @param {number} max
|
|
* @returns {number}
|
|
*/
|
|
export function randomInt(min, max) {
|
|
return Math.floor(Math.random() * (max - min + 1)) + min;
|
|
}
|
|
|
|
/**
|
|
* Generates a random number based on previous number, and provided range
|
|
* Also taking into account global provided min and max values
|
|
* @param {number} previousNumber
|
|
* @param {number} range (0 - 1)
|
|
* @param {number} min
|
|
* @param {number} max
|
|
* @returns {number}
|
|
*/
|
|
export function randomInRange(previousNumber, range, min, max) {
|
|
// Decides on min max range for the next number
|
|
// based on range, and previous number
|
|
const integerRange = previousNumber * range; // +- 0.3 -> 30%
|
|
// Calculate min, and check if its less that global min (eg. 0)
|
|
let newMin = previousNumber - integerRange;
|
|
if (newMin < min) newMin = min; // sets to global min, for example 0
|
|
|
|
// calculate max, and check if number is above the global set max (eg. 100)
|
|
let newMax = previousNumber + integerRange;
|
|
if (newMax > max) newMax = max; // sets to global max, for example 100
|
|
|
|
return Math.floor(randomInt(newMin, newMax));
|
|
}
|