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__FORCETOC__
== About Me ==
Hi, my name is Sasha. I'm in GAM670
== Force Feedback ==
Add this to '''WindowSettings.h''':
<big>
#define IDC_NOFF //number
</big>
Add this in typedef enum Integer in '''Configuration.h''':
<big>
GF_CT_RMBL
</big>
In '''iInput.h''':<br />
add line 1 in the iJoystick class<br />
In '''Input.h''':<br />
add line 2 in the Joystick class<br />
add line 3 in the Joystick class<br />
<big>
1.
public:
virtual void updateForce(float, double, int) = 0;
2.
int feedBackOFF;
LPDIRECTINPUTEFFECT centre;
LPDIRECTINPUTEFFECT ffEffects;
3.
public:
void updateForce(float factor, double time, int direction);
</big>
In '''Input.cpp''', add the following to the Joystick constructor
<big>
ffEffects = NULL;
centre = NULL;
feedBackOFF = 0;
</big>
add this in Joystick::interrogate function:
<big>
DIDEVCAPS didcaps;
didcaps.dwSize = sizeof didcaps;
if(SUCCEEDED(didInter->GetCapabilities(&didcaps)) &&
(didcaps.dwFlags && DIDC_FOREFEEDBACK){
EnableWindow(GetDlgItem((HWND)hwnd, IDC_NOFF), TRUE);
}
else{
EnableWindow(GetDlgItem((HWND)hwnd, IDC_NOFF), FALSE);
}
</big>
add this in Joystick::setup function:
<big>
feedBackOFF = !!(flags & 8);
</big>
change the SetCooperativeLevel in setup to check for device exclusivity
<big>
else if (FAILED(joystick->SetCooperativeLevel((HWND)hwnd,
(feedBackOFF ? DISCL_NONEXCLUSIVE : DISCL_EXCLUSIVE) | DISCL_FOREGROUND)))
</big>
add this line after (!zAxisOn)
<big>
if(feedBackOFF)
centre = NULL;
</big>
add these in the restore function:
<big>
else{
if(ffEffects){
ffEffects->Download();
}
if(centre){
centre->Download();
centre->Start(1,0);
}
</big>
add this function in:
<big>
void Joystick::updateForce(float factor, double time, int direction){
if(joystick)
{
if (feedBackOFF == 0)
{
if(context->get(GF_CT_RMBL) == 1)
{
if(ffEffects){
ffEffects->Download();
}
DIEFFECT dif;
DWORD axes[2] = {DIJOFS_X, DIJOFS_Y};
LONG dir[2] = {1, 0};
ZeroMemory(&dif, sizeof dif);
// set the size of the struct
dif.dwSize = sizeof dif;
// set axes and directions
dif.rgdwAxes = axes;
dif.rglDirection = dir;
DIPERIODIC dip;
DIENVELOPE die;
// if both x & y have FF, make shake come at 45 degree angle
// otherwise just shake the x axis.
//
if (axisIsActive[0] && axisIsActive[1]) {
dif.dwFlags = DIEFF_POLAR | DIEFF_OBJECTOFFSETS;
dif.cAxes = 2;
dir[0] = direction * DI_DEGREES;
}
else { // assume only x axis has FF
dif.dwFlags = DIEFF_CARTESIAN | DIEFF_OBJECTOFFSETS;
dif.cAxes = 1;
}
dif.dwGain = DI_FFNOMINALMAX;
dif.dwDuration = time * DI_SECONDS / 2; // Timing in seconds of the force feedback, time is passed in here;
dif.dwSamplePeriod = direction;
dif.dwTriggerButton = DIEB_NOTRIGGER;
dif.dwTriggerRepeatInterval = 0;
dif.lpEnvelope = ¨
dif.cbTypeSpecificParams = sizeof dip;
dif.lpvTypeSpecificParams = &dip;
dif.dwStartDelay = 3 * DI_SECONDS; // 3 secs
dip.dwMagnitude = 3 * DI_FFNOMINALMAX / 10;
dip.lOffset = 0;
dip.dwPhase = 0;
dip.dwPeriod = DI_SECONDS / 10; // 1/10th second
die.dwSize = sizeof die;
die.dwAttackLevel = factor;
die.dwAttackTime = factor * DI_SECONDS / 2;
die.dwFadeLevel = factor;
die.dwFadeTime = DI_SECONDS / 2;
HRESULT hr = joystick->CreateEffect(GUID_Square, &dif, &ffEffects, NULL);
// create a ramp force
DIRAMPFORCE dirf;
// if both x & y have FF, use the direction to change the angle of the shake
// otherwise just shake the x axis.
//
if (axisIsActive[0] && axisIsActive[1]) {
dif.dwFlags = DIEFF_POLAR | DIEFF_OBJECTOFFSETS;
dif.cAxes = 2;
dir[0] = direction * DI_DEGREES;
}
else { // assume only x axis has FF
dif.dwFlags = DIEFF_CARTESIAN | DIEFF_OBJECTOFFSETS;
dif.cAxes = 1;
}
dif.dwGain = DI_FFNOMINALMAX;
dif.dwDuration = time * DI_SECONDS / 2; // Timing in seconds for the force feedback, time is passed in here;
dif.dwSamplePeriod = direction;
dif.dwTriggerButton = DIEB_NOTRIGGER;
dif.dwTriggerRepeatInterval = 0;
dif.lpEnvelope = ¨
dif.cbTypeSpecificParams = sizeof dirf;
dif.lpvTypeSpecificParams = &dirf;
dif.dwStartDelay = 0.01 * DI_SECONDS;
dirf.lStart = DI_FFNOMINALMAX / 2;
dirf.lEnd = - DI_FFNOMINALMAX / 2;
die.dwSize = sizeof die;
die.dwAttackLevel = DI_FFNOMINALMAX / 50;
die.dwAttackTime = time * DI_SECONDS / 2;
die.dwFadeLevel = DI_FFNOMINALMAX / 10;
die.dwFadeTime = time * DI_SECONDS / 2;
if (SUCCEEDED(joystick->CreateEffect(GUID_RampForce, &dif,
&ffEffects, NULL))){
ffEffects->Download();// download to driver
ffEffects->Start(INFINITE,0); // infinite so it can be played as many times
}
}
else if(context->get(GF_CT_RMBL) == 0)
{
if(ffEffects){
DWORD DIGFFS_STOPPED1 = 2;
if(!joystick->GetForceFeedbackState(&DIGFFS_STOPPED1))
ffEffects->Stop();
}
}
}
}
}
</big>
Add this to release:
<big>
if(centre){
centre->Release();
centre = NULL;
}
if(ffEffects){
ffEffects->Release();
ffEffects = NULL;
}
</big>
In '''UserDialog.cpp''':
In the saveUserChoices function, add another bool called ff:
<big>
bool y, z, '''ff''', none;
</big>
Add this line after the y and z are retrieved
<big>
ff = SendDlgItemMessage(hwnd, IDC_NOFF, BM_GETCHECK, 0, 0) != BST_CHECKED;
</big>
Add this in the else statement after y = z = false;
<big>
ff = true;
</big>
Change the flags being set after:
<big>
flags = ((y ? 1 : 0) << 2) | ((z ? 1 : 0) << 1) '''| ((ff ? 0 : 1) << 3)''' | (none ? 1 : 0);
</big>
in '''iDesign.h''', add these to the iDesign class:
<big>
virtual bool sendForce(bool) = 0;
virtual void setForceTime(double) = 0;
virtual double getForceTime() = 0;
virtual void setForceDir(int) = 0;
virtual int getForceDir() = 0;
virtual void setForceFactor(float) = 0;
virtual float getForceFactor() = 0;
</big>
in '''Design.h''', add these to the Design class:
<big>
private:
float fFactor;
double fTime;
int fDirection;
public:
bool sendForce(bool);
void setForceTime(double);
double getForceTime();
void setForceDir(int);
int getForceDir();
void setForceFactor(float);
float getForceFactor();
</big>
In '''Design.cpp''' constructor, add these default values:
<big>
fTime = 0.1;
fFactor = 1.0f;
fDirection = 45;
</big>
You can then use these in Design::update function
<big>
setForceTime(double);
setForceDir(int);
setForceFactor(float);
sendForce(bool);
context->set(GF_CT_RMBL, int(0 or 1));
</big>
Add these functions in '''Design.cpp'''
<big>
bool Design::sendForce(bool force)
{
return force;
}
void Design::setForceTime(double time)
{
fTime = time;
}
double Design::getForceTime()
{
if(fTime != 0.0)
return fTime;
}
void Design::setForceDir(int fctr)
{
fDirection = fctr;
}
int Design::getForceDir()
{
return fDirection;
}
void Design::setForceFactor(float)
{
fFactor = 1.0f;
}
float Design::getForceFactor()
{
return fFactor;
}
</big>
In '''Engine.cpp''', add this to run method:
<big>
joystick->updateForce(design->getForceFactor(), design->getForceTime(), design->getForceDir());
</big>
