natural_scroll doesn't work with scroll_factor

[veillain]

Already reported ? *

• I have searched the existing open and closed issues.

Regression?

I don't know, I started using Hyprland only recently

System Info and Hyprland Version

System/Version info

<Hyprland 0.47.2 built from branch  at commit 882f7ad7d2bbfc7440d0ccaef93b1cdd78e8e3ff  (version: bump to 0.47.2).
Date: Sun Feb 2 00:47:17 2025
Tag: v0.47.2, commits: 5767
built against:
 aquamarine 0.7.2
 hyprlang 0.6.0
 hyprutils 0.5.0
 hyprcursor 0.1.11
 hyprgraphics 0.1.2


no flags were set


System Information:
System name: Linux
Node name: al
Release: 6.13.2-zen1-1-zen
Version: #1 ZEN SMP PREEMPT_DYNAMIC Sat, 08 Feb 2025 18:54:38 +0000


GPU information: 
00:02.0 VGA compatible controller [0300]: Intel Corporation Alder Lake-UP3 GT1 [UHD Graphics] [8086:46b3] (rev 0c) (prog-if 00 [VGA controller])


os-release: NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling
ANSI_COLOR="38;2;23;147;209"
HOME_URL="https://archlinux.org/"
DOCUMENTATION_URL="https://wiki.archlinux.org/"
SUPPORT_URL="https://bbs.archlinux.org/"
BUG_REPORT_URL="https://gitlab.archlinux.org/groups/archlinux/-/issues"
PRIVACY_POLICY_URL="https://terms.archlinux.org/docs/privacy-policy/"
LOGO=archlinux-logo


plugins:>

Description

when i use natural_scroll only, it will works. But when i added scroll_factor -0.5, the natural_scroll doesn't work anymore

How to reproduce

use this configuration in hyprland.conf
input {
touchpad {
natural_scroll = true
}
}

and then add scroll_factor
input {
touchpad {
scroll_factor = -0.5
natural_scroll = true
}
}

Attach not paste

• I understand that all text files must be attached, and not pasted directly. If not respected, this issue will likely get closed as spam

Checklist of files to include below

• Hyprland config - hyprctl systeminfo -c (always include)
• Crash report (always include in case of crash)
• Video (always include in case of a visual bug)
• Logs (might contain useful info such as errors)

Additional info & File uploads

hyprland_config_dump.txt

hyprland.log

[veillain]

one more thing, the natural_scroll was on the mouse instead touchpad

[fufexan]

I think this is an oversight on our part. scroll_factor should not be negative.

Natural scroll basically inverts the scroll direction ($\text{scroll} \cdot -1$), and then you invert it again using the scroll factor ($\text{invertedScroll}\cdot -0.5$). The inversions obviously cancel out and you only get a slowed down scrolling.

So the fix would be to use 0.5 instead of -0.5.