logarithmic.ts

function linearToLogarithmic(linearValue: number, minValue: number, maxValue: number) {
	const range = maxValue - minValue;
	let value = Math.round(Math.pow(range + 1, linearValue) + minValue - 1);

	if (value < minValue) {
		value = minValue;
	} else if (value > maxValue) {
		value = maxValue;
	}

	return value;
};

function logarithmicToLinear(scale: number, minValue: number, maxValue: number) {
	const range = maxValue - minValue;
	const normalizedValue = scale - minValue + 1;

	if (normalizedValue <= 0) {
		return 0;
	} else if (scale >= maxValue) {
		return 1;
	} else {
		return Math.log(normalizedValue) / Math.log(range + 1);
	}
};