SDL_JoystickGetAxis(3) SDL API Reference SDL_JoystickGetAxis(3)NAME
SDL_JoystickGetAxis - Get the current state of an axis
SYNOPSIS
#include "SDL.h"
Sint16 SDL_JoystickGetAxis(SDL_Joystick *joystick, int axis);
DESCRIPTION
SDL_JoystickGetAxis returns the current state of the given axis on the given joystick.
On most modern joysticks the X axis is usually represented by axis 0 and the Y axis by axis 1. The value returned by SDL_JoystickGetAxis is
a signed integer (-32768 to 32768) representing the current position of the axis, it maybe necessary to impose certain tolerances on these
values to account for jitter. It is worth noting that some joysticks use axes 2 and 3 for extra buttons.
RETURN VALUE
Returns a 16-bit signed integer representing the current position of the axis.
EXAMPLES
Sint16 x_move, y_move;
SDL_Joystick *joy1;
.
.
x_move=SDL_JoystickGetAxis(joy1, 0);
y_move=SDL_JoystickGetAxis(joy1, 1);
SEE ALSO
SDL_JoystickNumAxes
SDL Tue 11 Sep 2001, 23:00 SDL_JoystickGetAxis(3)
Check Out this Related Man Page
SDL_JoystickOpen(3) SDL API Reference SDL_JoystickOpen(3)NAME
SDL_JoystickOpen- Opens a joystick for use.
SYNOPSIS
#include "SDL.h"
SDL_Joystick *SDL_JoystickOpen(int index);
DESCRIPTION
Opens a joystick for use within SDL. The index refers to the N'th joystick in the system. A joystick must be opened before it game be used.
RETURN VALUE
Returns a SDL_Joystick structure on success. NULL on failure.
EXAMPLES
SDL_Joystick *joy;
// Check for joystick
if(SDL_NumJoysticks()>0){
// Open joystick
joy=SDL_JoystickOpen(0);
if(joy)
{
printf("Opened Joystick 0
");
printf("Name: %s
", SDL_JoystickName(0));
printf("Number of Axes: %d
", SDL_JoystickNumAxes(joy));
printf("Number of Buttons: %d
", SDL_JoystickNumButtons(joy));
printf("Number of Balls: %d
", SDL_JoystickNumBalls(joy));
}
else
printf("Couldn't open Joystick 0
");
// Close if opened
if(SDL_JoystickOpened(0))
SDL_JoystickClose(joy);
}
SEE ALSO
SDL_JoystickClose
SDL Tue 11 Sep 2001, 23:00 SDL_JoystickOpen(3)
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