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#include "StdAfx.h"
char useGetAxis[] = "axisState = JOYSTICK(joystickNumber,'GetAxis',axisNumber)";
char synopsisGetAxis[] = "Given a joystick number and an axis number, return the immediate "
"state of the specified axis on the specified joystick. The returned value axisState is an "
"integer (-32768 to 32768) representing the current position of the axis. It might be necessary to "
"impose tolerances on the axisState value to ignore jitter."
"Use 'GetNumJoysticks' and 'GetNumAxes' to determine maximum legal values for joystickNumber and "
"buttonNumber arguments to 'GetAxis'. The first joystick and the first button are numbered 1. "
"It is an error to call 'GetAxis' if the specified joystick has no axes.";
void JOYSTICKGetAxis(int nlhs, mxArray *plhs[], int nrhs, CONSTmxArray *prhs[])
{
ProjectTable *joystickTable=GetProjectTable();
int numSticks, numAxes, fetchedAxis;
CONSTmxArray *numArg;
double stickNum;
SDL_Joystick *pStick;
if(joystickTable->giveHelp){GiveHelp(useGetAxis,synopsisGetAxis);return;}
numArg = joystickTable->joystickNumberArgument;
if(numArg == NULL || nlhs > 1 || nrhs > 1 || nrhs < 1 || !mxIsDouble(numArg) || (mxGetM(numArg) * mxGetN(numArg) != 1 ||
!mxIsDouble(prhs[0]) || mxGetM(prhs[0]) * mxGetN(prhs[0]) != 1)){
GiveUsageExit(useGetAxis);
}
numSticks = SDL_NumJoysticks();
stickNum = mxGetPr(numArg)[0];
if(stickNum > numSticks)
PrintfExit("The joystick number %d passed to JOYSTICK 'GetAxis' exceeds the number of joysticks, %d",stickNum,numSticks);
if(stickNum < 1)
PrintfExit("The joystick number passed to JOYSTICK 'GetButton' must be greater than 0");
pStick = GetJoystickObjFromNum((int)stickNum-1);
if(pStick == NULL)
PrintfExit("JOYSTICK 'GetAxis' can not open joystick number %d",stickNum);
numAxes = SDL_JoystickNumAxes(pStick);
fetchedAxis = (int)mxGetPr(prhs[0])[0];
if(fetchedAxis > numAxes || fetchedAxis < 0)
PrintfExit("The axis number %d passed to JOYSTICK 'GetAxis' is oustide the allowable range",fetchedAxis);
plhs[0] = mxCreateDoubleMatrix(1,1,mxREAL);
SDL_JoystickUpdate();
mxGetPr(plhs[0])[0] = SDL_JoystickGetAxis(pStick, fetchedAxis-1);
}
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