macOS-like acceleration curve for libinput

macos_accel.py

#!/usr/bin/env python3

# macOS-like pointer acceleration for libinput
# Author: fufexan <[email protected]>

# Uncomment matplotlib and the plot_curve definition and call to visualize the curve
# import matplotlib.pyplot as plt
import sys
import os

# ===== PARAMETERS =====
sample_point_count = 20  # number of sample points to calculate
# factors for accelerated speeds
low = 0.1
mid = 0.01
high = 0.005

# ===== END PARAMETERS =====

def find_arg(arg):
    """Check if a specific argument was passed via command line."""
    for i in sys.argv:
        if i == arg:
            return True
    return False

if find_arg("help") or find_arg("-h") or find_arg("--help") or find_arg("h"):
    print(f'{sys.argv[0]} [[accel_profile] [scroll_points] device=<device>]')
    exit(0)

def macos_acceleration(speed_in):
    # Apply a cubic function to simulate acceleration
    return low * speed_in + mid * speed_in**2 + high * speed_in**3

# Generate points using the macOS-like curve function
def generate_curve_points(count):
    max_speed = 10  # Adjust the maximum speed as needed
    step = max_speed / count
    speeds = [step * i for i in range(count)]
    factors = [macos_acceleration(speed) for speed in speeds]
    return speeds, factors, step

# Plot the curve
# def plot_curve(speeds, factors):
#     plt.plot(speeds, factors, label='macOS-like Curve')
#     plt.xlabel('Device Speed')
#     plt.ylabel('Pointer Speed (Factor)')
#     plt.legend(loc='best')
#     plt.show()

# Generate the sample points
speeds, factors, step = generate_curve_points(sample_point_count)

# Display points as text (optional)
sample_points_str = " ".join([f"{factor:.3f}" for factor in factors])
print(f'Points: {sample_points_str}')
print(f'Step: {step}')

def get_device():
    for i in sys.argv:
        if str(i).startswith('device='):
            print(str(i)[7::])
            return str(i)[7::]

def hyprctl(device, option, arg):
    os.system(f"hyprctl keyword 'device[{device}]:{option}' '{arg}'")

if find_arg("accel_profile"):
    device = get_device()
    print(f'Setting device:\'{device}\':accel_profile using hyprctl')
    hyprctl(device, 'accel_profile', f'custom {step} {sample_points_str}')

if find_arg("scroll_points"):
    device = get_device()
    print(f'Setting device:\'{device}\':scroll_points using hyprctl')
    hyprctl(device, 'scroll_points', f'{step} {sample_points_str}')

# Plot the generated curve
# plot_curve(speeds, factors)