sdl_joyaxisevent.3

MPEG-4编解码的实现(包括MPEG4视音频编解码)

.TH "SDL_JoyAxisEvent" "3" "Tue 11 Sep 2001, 22:59" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_JoyAxisEvent\- Joystick axis motion event structure
.SH "STRUCTURE DEFINITION"
.PP
.nf
\f(CWtypedef struct{
  Uint8 type;
  Uint8 which;
  Uint8 axis;
  Sint16 value;
} SDL_JoyAxisEvent;\fR
.fi
.PP
.SH "STRUCTURE DATA"
.TP 20
\fBtype\fR
\fBSDL_JOYAXISMOTION\fP
.TP 20
\fBwhich\fR
Joystick device index
.TP 20
\fBaxis\fR
Joystick axis index
.TP 20
\fBvalue\fR
Axis value (range: -32768 to 32767)
.SH "DESCRIPTION"
.PP
\fBSDL_JoyAxisEvent\fR is a member of the \fI\fBSDL_Event\fR\fR union and is used when an event of type \fBSDL_JOYAXISMOTION\fP is reported\&.
.PP
A \fBSDL_JOYAXISMOTION\fP event occurs when ever a user moves an axis on the joystick\&. The field \fBwhich\fR is the index of the joystick that reported the event and \fBaxis\fR is the index of the axis (for a more detailed explaination see the \fIJoystick section\fR)\&. \fBvalue\fR is the current position of the axis\&.
.SH "SEE ALSO"
.PP
\fI\fBSDL_Event\fR\fR, \fIJoystick Functions\fR, \fI\fBSDL_JoystickEventState\fP\fR, \fI\fBSDL_JoystickGetAxis\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 22:59