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Apply expo to gamepad axes with joy_expo cvar

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Expo makes gamepad stick input non-linear such that small
movements on the stick are less pronounced. This enables
both precise and fast movements, even at higher sensitivity levels.

Expo is applied to all axes equally.
This commit is contained in:
Larry Davis 2020-12-09 19:55:54 -08:00
parent bab977fa74
commit aafc2eb4f9
1 changed files with 5 additions and 0 deletions
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5
src/client/input/sdl.c
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@ -128,6 +128,7 @@ static cvar_t *joy_pitchsensitivity;
static cvar_t *joy_forwardsensitivity;
static cvar_t *joy_sidesensitivity;
static cvar_t *joy_upsensitivity;
static cvar_t *joy_expo;
// Joystick direction settings
static cvar_t *joy_axis_leftx;
@ -681,6 +682,9 @@ IN_Update(void)
fix_value = 0.0f;
}
// Apply expo
fix_value = pow(fix_value, joy_expo->value);
axis_value = (int) (32767 * ((axis_value < 0) ? -fix_value : fix_value));
if (cls.key_dest == key_game && (int) cl_paused->value == 0)
@ -1348,6 +1352,7 @@ IN_Init(void)
joy_forwardsensitivity = Cvar_Get("joy_forwardsensitivity", "1.0", CVAR_ARCHIVE);
joy_sidesensitivity = Cvar_Get("joy_sidesensitivity", "1.0", CVAR_ARCHIVE);
joy_upsensitivity = Cvar_Get("joy_upsensitivity", "1.0", CVAR_ARCHIVE);
joy_expo = Cvar_Get("joy_expo", "2.0", CVAR_ARCHIVE);
joy_axis_leftx = Cvar_Get("joy_axis_leftx", "sidemove", CVAR_ARCHIVE);
joy_axis_lefty = Cvar_Get("joy_axis_lefty", "forwardmove", CVAR_ARCHIVE);