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Clarified joystick axis processing.

This commit is contained in:
evilynux 2007-01-22 07:46:40 +00:00
parent a334dd6309
commit 0f6cd38709
1 changed files with 31 additions and 27 deletions
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58
desmume/src/ctrlssdl.c
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@ -201,6 +201,20 @@ u16 get_set_joy_key(int index) {
return key; return key;
} }
/* Reset corresponding key and its twin axis key */
u16 get_joy_axis_twin(u16 key)
{
switch(key)
{
case KEYMASK_( KEY_RIGHT-1 ):
return KEYMASK_( KEY_LEFT-1 );
case KEYMASK_( KEY_UP-1 ):
return KEYMASK_( KEY_DOWN-1 );
default:
return 0;
}
}
/* Get and set a new joystick axis */ /* Get and set a new joystick axis */
void get_set_joy_axis(int index, int index_o) { void get_set_joy_axis(int index, int index_o) {
BOOL done = FALSE; BOOL done = FALSE;
@ -287,34 +301,24 @@ u16 process_ctrls_events(u16 keypad)
Note: button constants have a 1bit offset. */ Note: button constants have a 1bit offset. */
case SDL_JOYAXISMOTION: case SDL_JOYAXISMOTION:
key = lookup_joy_key( JOY_AXIS_(event.jaxis.axis) ); key = lookup_joy_key( JOY_AXIS_(event.jaxis.axis) );
if( key != 0 ) if( key == 0 ) break; /* Not an axis of interest? */
{
if( event.jaxis.value == 0 )
{
switch(key)
{
case KEYMASK_( KEY_RIGHT-1 ):
key |= KEYMASK_( KEY_LEFT-1 );
break;
case KEYMASK_( KEY_UP-1 ):
key |= KEYMASK_( KEY_DOWN-1 );
break;
default:
printf("Unknown joystick state!\n");
break;
}
RM_KEY( keypad, key );
}
else if( (event.jaxis.value > 0) &&
(key == KEYMASK_( KEY_UP-1 )) )
key = KEYMASK_( KEY_DOWN-1 );
else if( (event.jaxis.value < 0) &&
(key == KEYMASK_( KEY_RIGHT-1 )) )
key = KEYMASK_( KEY_LEFT-1 );
if( (event.jaxis.value >> 5) != 0 ) /* Axis is back to initial position */
ADD_KEY( keypad, key ); if( event.jaxis.value == 0 )
} RM_KEY( keypad, key | get_joy_axis_twin(key) );
/* Key should have been down but its currently set to up? */
else if( (event.jaxis.value > 0) &&
(key == KEYMASK_( KEY_UP-1 )) )
key = KEYMASK_( KEY_DOWN-1 );
/* Key should have been left but its currently set to right? */
else if( (event.jaxis.value < 0) &&
(key == KEYMASK_( KEY_RIGHT-1 )) )
key = KEYMASK_( KEY_LEFT-1 );
/* Remove some sensitivity before checking if different than zero...
Fixes some badly behaving joypads [like one of mine]. */
if( (event.jaxis.value >> 5) != 0 )
ADD_KEY( keypad, key );
break; break;
/* Joystick button pressed */ /* Joystick button pressed */