feat(FPS): add Average setting

Author: cattyngmd

src/main/kotlin/com/lambda/module/hud/FPS.kt

@@ -22,31 +22,42 @@ import com.lambda.event.listener.SafeListener.Companion.listen
 import com.lambda.gui.dsl.ImGuiBuilder
 import com.lambda.module.HudModule
 import com.lambda.module.tag.ModuleTag
+import kotlin.time.Duration.Companion.seconds
 
 object FPS : HudModule(
 	name = "FPS",
 	description = "Displays your games frames per second",
 	tag = ModuleTag.HUD
 ) {
-	val updateDelay by setting("Update Delay", 50, 0..1000, 1, "Time between updating the fps value")
+	val average by setting("Average", false)
+	val updateDelay by setting("Update Delay", 50, 0..1000, 1, "Time between updating the fps value") {
+		!average
+	}
 
+	val frames = mutableListOf<Long>();
 	var lastUpdated = System.currentTimeMillis()
 	var lastFrameTime = System.nanoTime()
 	var fps = 0
 
 	init {
 		listen<RenderEvent.Render> {
-			val currentTimeNano = System.nanoTime()
-
-			val currentTypeMilli = System.currentTimeMillis()
-			if (currentTypeMilli - lastUpdated >= updateDelay) {
-				lastUpdated = currentTypeMilli
-				val elapsedNs = currentTimeNano - lastFrameTime
-				fps = if (elapsedNs > 0) (1000000000 / elapsedNs).toInt()
-				else 0
-			}
+			if (average) {
+				frames.add(System.nanoTime() + 1.seconds.inWholeNanoseconds)
+				frames.removeIf { System.nanoTime() > it }
+				fps = frames.size
+			} else {
+				val currentTimeNano = System.nanoTime()
 
-			lastFrameTime = currentTimeNano
+				val currentTypeMilli = System.currentTimeMillis()
+				if (currentTypeMilli - lastUpdated >= updateDelay) {
+					lastUpdated = currentTypeMilli
+					val elapsedNs = currentTimeNano - lastFrameTime
+					fps = if (elapsedNs > 0) (1000000000 / elapsedNs).toInt()
+					else 0
+				}
+
+				lastFrameTime = currentTimeNano
+			}
 		}
 	}