21 lines
624 B
JavaScript
21 lines
624 B
JavaScript
let lastRandom = -1;
|
|
|
|
function pRandom(from = 0, to = 2147483647) {
|
|
let thisRandom = Math.floor(map(Math.random(), 0, 1, from, to));
|
|
if (thisRandom == lastRandom) thisRandom = pRandom(from, to);
|
|
|
|
return thisRandom;
|
|
}
|
|
|
|
function map(input, inputMin, inputMax, outputMin, outputMax) {
|
|
const newv = (input - inputMin) / (inputMax - inputMin) * (outputMax - outputMin) + outputMin;
|
|
|
|
if (outputMin < outputMax) return constrain(newv, outputMin, outputMax);
|
|
else return constrain(newv, outputMax, outputMin);
|
|
}
|
|
|
|
function constrain(input, low, high) {
|
|
return Math.max(Math.min(input, high), low);
|
|
}
|
|
|
|
module.exports = pRandom; |