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Merge branch 'deadzone-sigfpe-fix' into 'master'

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Fix division-by-0 crash from 100% gamepad deadzones, and lack of input from 0% deadzones

See merge request STJr/SRB2!838
This commit is contained in:
SteelT 2020-03-18 15:39:04 -04:00
commit e3a5164ddf
1 changed files with 7 additions and 8 deletions
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15
src/g_game.c
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@ -1044,18 +1044,17 @@ static INT32 G_BasicDeadZoneCalculation(INT32 magnitude, fixed_t deadZone)
{
const INT32 jdeadzone = (JOYAXISRANGE * deadZone) / FRACUNIT;
INT32 deadzoneAppliedValue = 0;
INT32 adjustedMagnitude = abs(magnitude);
if (jdeadzone > 0)
if (jdeadzone >= JOYAXISRANGE && adjustedMagnitude >= JOYAXISRANGE) // If the deadzone and magnitude are both 100%...
return JOYAXISRANGE; // ...return 100% input directly, to avoid dividing by 0
else if (adjustedMagnitude > jdeadzone) // Otherwise, calculate how much the magnitude exceeds the deadzone
{
if (magnitude > jdeadzone)
{
INT32 adjustedMagnitude = abs(magnitude);
adjustedMagnitude = min(adjustedMagnitude, JOYAXISRANGE);
adjustedMagnitude = min(adjustedMagnitude, JOYAXISRANGE);
adjustedMagnitude -= jdeadzone;
adjustedMagnitude -= jdeadzone;
deadzoneAppliedValue = (adjustedMagnitude * JOYAXISRANGE) / (JOYAXISRANGE - jdeadzone);
}
deadzoneAppliedValue = (adjustedMagnitude * JOYAXISRANGE) / (JOYAXISRANGE - jdeadzone);
}
return deadzoneAppliedValue;