Current CS GO accel code

//full credit to altimor

float mx = *x, my = *y;

float scale;
float mouse_sensitivity = (gHUD.GetSensitivity() != 0) ? gHUD.GetSensitivity() : sensitivity.GetFloat();

if(m_customaccel == 3) {
	float raw_dist = sqrt(mx * mx + my * my);
	float power = max(0.0f, m_customaccel_exponent - 1.0f);

	float scale = powf(raw_dist, power);
	*x *= mouse_sensitivity * scale;
	*y *= mouse_sensitivity * scale;
}
else if(m_customaccel != 0) {
	float raw_mouse_movement_distance = sqrt( mx * mx + my * my );
	float acceleration_scale = m_customaccel_scale.GetFloat();
	float accelerated_sensitivity_max = m_customaccel_max.GetFloat();
	float accelerated_sensitivity_exponent = m_customaccel_exponent.GetFloat();
	float accelerated_sensitivity = ( (float)pow( raw_mouse_movement_distance, accelerated_sensitivity_exponent ) * acceleration_scale + mouse_sensitivity );

	if ( accelerated_sensitivity_max > 0.0001f &&
		accelerated_sensitivity > accelerated_sensitivity_max )
	{
		accelerated_sensitivity = accelerated_sensitivity_max;
	}

	*x *= accelerated_sensitivity;
	*y *= accelerated_sensitivity;

	// Further re-scale by yaw and pitch magnitude if user requests alternate mode 2
	// This means that they will need to up their value for m_customaccel_scale greatly (>40x) since m_pitch/yaw default
	//  to 0.022
	if ( m_customaccel.GetInt() == 2 )
	{
		*x *= m_yaw.GetFloat();
		*y *= m_pitch->GetFloat();
	}
}
else {
	*x *= mouse_sensitivity;
	*y *= mouse_sensitivity;
}