feat(xp): functions

xp/functions.go

@@ -0,0 +1,33 @@
+package xp
+
+import "math"
+
+func XPMessage(length uint, diversity uint) uint {
+	return uint(math.Floor(
+		0.025*math.Pow(float64(length), 1.25)*math.Sqrt(float64(diversity)) + 1,
+	))
+}
+
+func XPVocal(time uint) uint {
+	return uint(math.Floor(
+		0.01*math.Pow(float64(time), 1.3) + 1,
+	))
+}
+
+func Level(xp uint) uint {
+	return uint(math.Floor(
+		0.2 * math.Sqrt(float64(xp)),
+	))
+}
+
+func XPForLevel(level uint) uint {
+	return uint(math.Floor(
+		math.Pow(float64(5*level), 2),
+	))
+}
+
+func Lose(time uint, xp uint) uint {
+	return uint(math.Floor(
+		math.Pow(float64(time), 2) * math.Pow(10, -2+math.Log(float64(time/85))) * math.Floor(float64(time/500)),
+	))
+}