From 70195051ec4811edb8dea782d07cb6f20d1bbdec Mon Sep 17 00:00:00 2001
From: Ralty <78720179+Raltyro@users.noreply.github.com>
Date: Wed, 6 Aug 2025 17:51:13 +0700
Subject: [PATCH] Zoom Multiplier for camZooming

---
 source/funkin/backend/system/Flags.hx |  3 ++
 source/funkin/game/PlayState.hx       | 43 ++++++++++++++++++++++-----
 2 files changed, 39 insertions(+), 7 deletions(-)

diff --git a/source/funkin/backend/system/Flags.hx b/source/funkin/backend/system/Flags.hx
index bf28a74f..281ccae4 100644
--- a/source/funkin/backend/system/Flags.hx
+++ b/source/funkin/backend/system/Flags.hx
@@ -136,6 +136,9 @@ class Flags {
 	public static var DEFAULT_CAM_ZOOM_STRENGTH:Int = 1;
 	public static var DEFAULT_CAM_ZOOM:Float = 1.05; // what zoom level it defaults to
 	public static var DEFAULT_HUD_ZOOM:Float = 1.0;
+	public static var DEFAULT_ZOOM:Float = 1.0;
+	public static var DEFAULT_ZOOM_LERP:Float = 0.05;
+	public static var USE_CAM_ZOOM_MULT:Bool = true;
 	public static var MAX_CAMERA_ZOOM_MULT:Float = 1.35;
 
 	// to translate these you need to convert them into ids
diff --git a/source/funkin/game/PlayState.hx b/source/funkin/game/PlayState.hx
index 79bf9b79..4dc1c287 100644
--- a/source/funkin/game/PlayState.hx
+++ b/source/funkin/game/PlayState.hx
@@ -372,6 +372,17 @@ class PlayState extends MusicBeatState
 	 */
 	public var camHUDZoomLerp:Float = Flags.DEFAULT_HUD_ZOOM_LERP;
 
+	/**
+	 * Camera zoom at which the cameras that zooms lerps to.
+	 * (Only used if useCamZoomMult is on).
+	 */
+	public var defaultZoom:Float = Flags.DEFAULT_ZOOM;
+	/**
+	 * Speed at which the cameras that zooms zoom lerps to.
+	 * (Only used if useCamZoomMult is on).
+	 */
+	public var camZoomLerp:Float = Flags.DEFAULT_ZOOM_LERP;
+
 	/**
 	 * Whenever cam zooming is enabled, enables on a note hit if not cancelled.
 	 */
@@ -401,12 +412,21 @@ class PlayState extends MusicBeatState
 	 */
 	public var camZoomingStrength:Float = Flags.DEFAULT_CAM_ZOOM_STRENGTH;
 	/**
-	  * Default multiplier for `maxCamZoom`.
-	  */
+	 * Default multiplier for `maxCamZoom`.
+	 */
 	public var maxCamZoomMult:Float = Flags.MAX_CAMERA_ZOOM_MULT;
 	/**
-	  * Maximum amount of zoom for the camera (based on `maxCamZoomMult` and the camera's zoom IF not set).
-	  */
+	 * Whether it should use a implementation where it multiplies the current camera zoom instead.
+	 */
+	public var useCamZoomMult:Bool = Flags.USE_CAM_ZOOM_MULT;
+	/**
+	 * The current multiplier for cam zooming.
+	 * (Only used if useCamZoomMult is on).
+	 */
+	public var camZoomingMult:Float = Flags.DEFAULT_ZOOM;
+	/**
+	 * Maximum amount of zoom for the camera (based on `maxCamZoomMult` and the camera's zoom IF not set).
+	 */
 	public var maxCamZoom(get, default):Float = Math.NaN;
 
 	private inline function get_maxCamZoom() return Math.isNaN(maxCamZoom) ? maxCamZoomMult * defaultCamZoom : maxCamZoom;
@@ -1324,12 +1344,15 @@ class PlayState extends MusicBeatState
 		if (canAccessDebugMenus && chartingMode && controls.DEV_ACCESS)
 			FlxG.switchState(new funkin.editors.charter.Charter(SONG.meta.name, difficulty, false));
 
-		if (Options.camZoomOnBeat && camZooming && FlxG.camera.zoom < maxCamZoom) {
+		if (Options.camZoomOnBeat && camZooming) {
 			var beat = Conductor.getBeats(camZoomingEvery, camZoomingInterval, camZoomingOffset);
 			if (camZoomingLastBeat != beat) {
 				camZoomingLastBeat = beat;
-				FlxG.camera.zoom += 0.015 * camZoomingStrength;
-				camHUD.zoom += 0.03 * camZoomingStrength;
+				if (useCamZoomMult) camZoomingMult = Math.min(camZoomingMult + camZoomingStrength, defaultZoom + camZoomingStrength);
+				else if (FlxG.camera.zoom < maxCamZoom) {
+					FlxG.camera.zoom += 0.015 * camZoomingStrength;
+					camHUD.zoom += 0.03 * camZoomingStrength;
+				}
 			}
 		}
 
@@ -1372,6 +1395,12 @@ class PlayState extends MusicBeatState
 			moveCamera();
 
 		if (camZooming) {
+			if (useCamZoomMult) {
+				camZoomingMult = lerp(camZoomingMult, defaultZoom, camZoomLerp) - defaultZoom;
+				FlxG.camera.zoomMultiplier = camZoomingMult * 0.015 + defaultZoom;
+				camHUD.zoomMultiplier = camZoomingMult * 0.03 + defaultZoom;
+				camZoomingMult += defaultZoom;
+			}
 			FlxG.camera.zoom = lerp(FlxG.camera.zoom, defaultCamZoom, camGameZoomLerp);
 			camHUD.zoom = lerp(camHUD.zoom, defaultHudZoom, camHUDZoomLerp);
 		}