From 684d154a6db9c4b73b2b42a9049fe3ca58954517 Mon Sep 17 00:00:00 2001
From: codemob <69110900+codemob-dev@users.noreply.github.com>
Date: Sun, 13 Jul 2025 06:19:58 -0400
Subject: [PATCH] Added invert mouse Y setting (#1666)

Fixes #1296.
---
 src/graphics/Window.zig      | 6 +++++-
 src/gui/windows/controls.zig | 8 ++++++++
 src/settings.zig             | 2 ++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/graphics/Window.zig b/src/graphics/Window.zig
index 881dae64..ffb61d10 100644
--- a/src/graphics/Window.zig
+++ b/src/graphics/Window.zig
@@ -489,7 +489,11 @@ pub const GLFWCallbacks = struct { // MARK: GLFWCallbacks
 			@floatCast(y),
 		};
 		if(grabbed and !ignoreDataAfterRecentGrab) {
-			deltas[deltaBufferPosition] += (newPos - currentPos)*@as(Vec2f, @splat(main.settings.mouseSensitivity));
+			var newDelta = (newPos - currentPos)*@as(Vec2f, @splat(main.settings.mouseSensitivity));
+			if(settings.invertMouseY) {
+				newDelta[1] *= -1;
+			}
+			deltas[deltaBufferPosition] += newDelta;
 			var averagedDelta: Vec2f = Vec2f{0, 0};
 			for(deltas) |delta| {
 				averagedDelta += delta;
diff --git a/src/gui/windows/controls.zig b/src/gui/windows/controls.zig
index 11114170..9db2ee3e 100644
--- a/src/gui/windows/controls.zig
+++ b/src/gui/windows/controls.zig
@@ -7,6 +7,7 @@ const gui = @import("../gui.zig");
 const GuiComponent = gui.GuiComponent;
 const GuiWindow = gui.GuiWindow;
 const Button = @import("../components/Button.zig");
+const CheckBox = @import("../components/CheckBox.zig");
 const HorizontalList = @import("../components/HorizontalList.zig");
 const Label = @import("../components/Label.zig");
 const VerticalList = @import("../components/VerticalList.zig");
@@ -56,6 +57,11 @@ fn updateSensitivity(sensitivity: f32) void {
 	main.settings.save();
 }
 
+fn invertMouseYCallback(newValue: bool) void {
+	main.settings.invertMouseY = newValue;
+	main.settings.save();
+}
+
 fn updateDeadzone(deadzone: f32) void {
 	main.settings.controllerAxisDeadzone = deadzone;
 }
@@ -89,6 +95,8 @@ pub fn onOpen() void {
 	const list = VerticalList.init(.{padding, 16 + padding}, 364, 8);
 	list.add(Button.initText(.{0, 0}, 128, if(editingKeyboard) "Gamepad" else "Keyboard", .{.callback = &toggleKeyboard}));
 	list.add(ContinuousSlider.init(.{0, 0}, 256, 0, 5, if(editingKeyboard) main.settings.mouseSensitivity else main.settings.controllerSensitivity, &updateSensitivity, &sensitivityFormatter));
+	list.add(CheckBox.init(.{0, 0}, 256, "Invert mouse Y", main.settings.invertMouseY, &invertMouseYCallback));
+
 	if(!editingKeyboard) {
 		list.add(ContinuousSlider.init(.{0, 0}, 256, 0, 5, main.settings.controllerAxisDeadzone, &updateDeadzone, &deadzoneFormatter));
 	}
diff --git a/src/settings.zig b/src/settings.zig
index a83ea283..85a157b7 100644
--- a/src/settings.zig
+++ b/src/settings.zig
@@ -26,6 +26,8 @@ pub var fov: f32 = 70;
 pub var mouseSensitivity: f32 = 1;
 pub var controllerSensitivity: f32 = 1;
 
+pub var invertMouseY: bool = false;
+
 pub var renderDistance: u16 = 7;
 
 pub var highestLod: u3 = highestSupportedLod;