unsigned int SdlJoystick::getCapabilities()
{
#if SDL_VERSION_ATLEAST(1,3,0)
if (mHaptic) return SDL_HapticQuery(mHaptic);
#endif
return 0;
}
/**
* @brief Initializes force feedback for the loaded device.
*/
static void joystick_initHaptic (void)
{
#if SDL_VERSION_ATLEAST(1,3,0)
if (has_haptic && SDL_JoystickIsHaptic(joystick)) {
/* Close haptic if already open. */
if (haptic != NULL) {
SDL_HapticClose(haptic);
haptic = NULL;
}
/* Try to create haptic device. */
haptic = SDL_HapticOpenFromJoystick(joystick);
if (haptic == NULL) {
WARN("Unable to initialize force feedback: %s", SDL_GetError());
return;
}
/* Check to see what it supports. */
haptic_query = SDL_HapticQuery(haptic);
if (!(haptic_query & SDL_HAPTIC_SINE)) {
SDL_HapticClose(haptic);
haptic = NULL;
return;
}
DEBUG(" force feedback enabled");
}
#endif /* SDL_VERSION_ATLEAST(1,3,0) */
}
bool CSDLPad::OpenDevice()
{
m_pSDLDevice = SDL_JoystickOpen(m_deviceNo);
if (m_pSDLDevice)
{
// SDL_SetHint(SDL_HINT_ACCELEROMETER_AS_JOYSTICK) should skip the accelerometer when
// enumerating joysticks, but it doesn't seem to work. Manually check for it here
// and close it.
// FIXME: Need a more robust way of detecting this (or get SetHint() to work).
if (strcmp(SDL_JoystickName(m_pSDLDevice), "Android Accelerometer") == 0)
{
SDL_JoystickClose(m_pSDLDevice);
return false;
}
m_connected = true;
#if defined(SDL_USE_HAPTIC_FEEDBACK)
m_pHapticDevice = SDL_HapticOpenFromJoystick(m_pSDLDevice);
if (m_pHapticDevice && (SDL_HapticQuery(m_pHapticDevice) & SDL_HAPTIC_LEFTRIGHT))
{
m_supportsFeedback = true;
}
else
{
if (m_pHapticDevice) SDL_HapticClose(m_pHapticDevice);
m_supportsFeedback = false;
}
#else
m_supportsFeedback = false;
#endif
m_curHapticEffect = -1;
gEnv->pLog->Log("CSDLPad - Gamepad [%d] supports feedback (Y/N): %s", m_deviceNo, m_supportsFeedback ? "Y" : "N");
}
return m_pSDLDevice != NULL;
}
/*
* Displays information about the haptic device.
*/
static void
HapticPrintSupported(SDL_Haptic * haptic)
{
unsigned int supported;
supported = SDL_HapticQuery(haptic);
SDL_Log(" Supported effects [%d effects, %d playing]:\n",
SDL_HapticNumEffects(haptic), SDL_HapticNumEffectsPlaying(haptic));
if (supported & SDL_HAPTIC_CONSTANT)
SDL_Log(" constant\n");
if (supported & SDL_HAPTIC_SINE)
SDL_Log(" sine\n");
/* !!! FIXME: put this back when we have more bits in 2.1 */
/* if (supported & SDL_HAPTIC_SQUARE)
SDL_Log(" square\n"); */
if (supported & SDL_HAPTIC_TRIANGLE)
SDL_Log(" triangle\n");
if (supported & SDL_HAPTIC_SAWTOOTHUP)
SDL_Log(" sawtoothup\n");
if (supported & SDL_HAPTIC_SAWTOOTHDOWN)
SDL_Log(" sawtoothdown\n");
if (supported & SDL_HAPTIC_RAMP)
SDL_Log(" ramp\n");
if (supported & SDL_HAPTIC_FRICTION)
SDL_Log(" friction\n");
if (supported & SDL_HAPTIC_SPRING)
SDL_Log(" spring\n");
if (supported & SDL_HAPTIC_DAMPER)
SDL_Log(" damper\n");
if (supported & SDL_HAPTIC_INERTIA)
SDL_Log(" inertia\n");
if (supported & SDL_HAPTIC_CUSTOM)
SDL_Log(" custom\n");
if (supported & SDL_HAPTIC_LEFTRIGHT)
SDL_Log(" left/right\n");
SDL_Log(" Supported capabilities:\n");
if (supported & SDL_HAPTIC_GAIN)
SDL_Log(" gain\n");
if (supported & SDL_HAPTIC_AUTOCENTER)
SDL_Log(" autocenter\n");
if (supported & SDL_HAPTIC_STATUS)
SDL_Log(" status\n");
}
bool Joystick::isVibrationSupported()
{
if (!checkCreateHaptic())
return false;
unsigned int features = SDL_HapticQuery(haptic);
if ((features & SDL_HAPTIC_LEFTRIGHT) != 0)
return true;
// Some gamepad drivers only support left/right motors via a custom effect.
if (isGamepad() && (features & SDL_HAPTIC_CUSTOM) != 0)
return true;
// Test for simple sine wave support as a last resort.
if ((features & SDL_HAPTIC_SINE) != 0)
return true;
return false;
}
/*
* Displays information about the haptic device.
*/
static void
HapticPrintSupported(SDL_Haptic * haptic)
{
unsigned int supported;
supported = SDL_HapticQuery(haptic);
printf(" Supported effects [%d effects, %d playing]:\n",
SDL_HapticNumEffects(haptic), SDL_HapticNumEffectsPlaying(haptic));
if (supported & SDL_HAPTIC_CONSTANT)
printf(" constant\n");
if (supported & SDL_HAPTIC_SINE)
printf(" sine\n");
if (supported & SDL_HAPTIC_SQUARE)
printf(" square\n");
if (supported & SDL_HAPTIC_TRIANGLE)
printf(" triangle\n");
if (supported & SDL_HAPTIC_SAWTOOTHUP)
printf(" sawtoothup\n");
if (supported & SDL_HAPTIC_SAWTOOTHDOWN)
printf(" sawtoothdown\n");
if (supported & SDL_HAPTIC_RAMP)
printf(" ramp\n");
if (supported & SDL_HAPTIC_FRICTION)
printf(" friction\n");
if (supported & SDL_HAPTIC_SPRING)
printf(" spring\n");
if (supported & SDL_HAPTIC_DAMPER)
printf(" damper\n");
if (supported & SDL_HAPTIC_INERTIA)
printf(" intertia\n");
if (supported & SDL_HAPTIC_CUSTOM)
printf(" custom\n");
printf(" Supported capabilities:\n");
if (supported & SDL_HAPTIC_GAIN)
printf(" gain\n");
if (supported & SDL_HAPTIC_AUTOCENTER)
printf(" autocenter\n");
if (supported & SDL_HAPTIC_STATUS)
printf(" status\n");
}
Joystick::Joystick(SDL_Joystick* const joystick, const int sdl_index, const unsigned int index)
: m_joystick(joystick)
, m_sdl_index(sdl_index)
, m_index(index)
{
// really bad HACKS:
// to not use SDL for an XInput device
// too many people on the forums pick the SDL device and ask:
// "why don't my 360 gamepad triggers/rumble work correctly"
#ifdef _WIN32
// checking the name is probably good (and hacky) enough
// but i'll double check with the num of buttons/axes
std::string lcasename = GetName();
std::transform(lcasename.begin(), lcasename.end(), lcasename.begin(), tolower);
if ((std::string::npos != lcasename.find("xbox 360"))
&& (10 == SDL_JoystickNumButtons(joystick))
&& (5 == SDL_JoystickNumAxes(joystick))
&& (1 == SDL_JoystickNumHats(joystick))
&& (0 == SDL_JoystickNumBalls(joystick))
)
{
// this device won't be used
return;
}
#endif
// get buttons
for (u8 i = 0; i != SDL_JoystickNumButtons(m_joystick); ++i)
AddInput(new Button(i, m_joystick));
// get hats
for (u8 i = 0; i != SDL_JoystickNumHats(m_joystick); ++i)
{
// each hat gets 4 input instances associated with it, (up down left right)
for (u8 d = 0; d != 4; ++d)
AddInput(new Hat(i, m_joystick, d));
}
// get axes
for (u8 i = 0; i != SDL_JoystickNumAxes(m_joystick); ++i)
{
// each axis gets a negative and a positive input instance associated with it
AddAnalogInputs(new Axis(i, m_joystick, -32768),
new Axis(i, m_joystick, 32767));
}
#ifdef USE_SDL_HAPTIC
// try to get supported ff effects
m_haptic = SDL_HapticOpenFromJoystick( m_joystick );
if (m_haptic)
{
//SDL_HapticSetGain( m_haptic, 1000 );
//SDL_HapticSetAutocenter( m_haptic, 0 );
const unsigned int supported_effects = SDL_HapticQuery( m_haptic );
// constant effect
if (supported_effects & SDL_HAPTIC_CONSTANT)
{
m_state_out.push_back(EffectIDState());
AddOutput(new ConstantEffect(m_state_out.back()));
}
// ramp effect
if (supported_effects & SDL_HAPTIC_RAMP)
{
m_state_out.push_back(EffectIDState());
AddOutput(new RampEffect(m_state_out.back()));
}
// sine effect
if (supported_effects & SDL_HAPTIC_SINE)
{
m_state_out.push_back(EffectIDState());
AddOutput(new SineEffect(m_state_out.back()));
}
// square effect
if (supported_effects & SDL_HAPTIC_SQUARE)
{
m_state_out.push_back(EffectIDState());
AddOutput(new SquareEffect(m_state_out.back()));
}
// triangle effect
if (supported_effects & SDL_HAPTIC_TRIANGLE)
{
m_state_out.push_back(EffectIDState());
AddOutput(new TriangleEffect(m_state_out.back()));
}
}
#endif
}
/**
* @brief The entry point of this force feedback demo.
* @param[in] argc Number of arguments.
* @param[in] argv Array of argc arguments.
*/
int
main(int argc, char **argv)
{
int i;
char *name;
int index;
SDL_HapticEffect efx[5];
int id[5];
int nefx;
unsigned int supported;
name = NULL;
index = -1;
if (argc > 1) {
name = argv[1];
if ((strcmp(name, "--help") == 0) || (strcmp(name, "-h") == 0)) {
printf("USAGE: %s [device]\n"
"If device is a two-digit number it'll use it as an index, otherwise\n"
"it'll use it as if it were part of the device's name.\n",
argv[0]);
return 0;
}
i = strlen(name);
if ((i < 3) && isdigit(name[0]) && ((i == 1) || isdigit(name[1]))) {
index = atoi(name);
name = NULL;
}
}
/* Initialize the force feedbackness */
SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_JOYSTICK |
SDL_INIT_HAPTIC);
printf("%d Haptic devices detected.\n", SDL_NumHaptics());
if (SDL_NumHaptics() > 0) {
/* We'll just use index or the first force feedback device found */
if (name == NULL) {
i = (index != -1) ? index : 0;
}
/* Try to find matching device */
else {
for (i = 0; i < SDL_NumHaptics(); i++) {
if (strstr(SDL_HapticName(i), name) != NULL)
break;
}
if (i >= SDL_NumHaptics()) {
printf("Unable to find device matching '%s', aborting.\n",
name);
return 1;
}
}
haptic = SDL_HapticOpen(i);
if (haptic == NULL) {
printf("Unable to create the haptic device: %s\n",
SDL_GetError());
return 1;
}
printf("Device: %s\n", SDL_HapticName(i));
HapticPrintSupported(haptic);
} else {
printf("No Haptic devices found!\n");
return 1;
}
/* We only want force feedback errors. */
SDL_ClearError();
/* Create effects. */
memset(&efx, 0, sizeof(efx));
nefx = 0;
supported = SDL_HapticQuery(haptic);
printf("\nUploading effects\n");
/* First we'll try a SINE effect. */
if (supported & SDL_HAPTIC_SINE) {
printf(" effect %d: Sine Wave\n", nefx);
efx[nefx].type = SDL_HAPTIC_SINE;
efx[nefx].periodic.period = 1000;
efx[nefx].periodic.magnitude = 0x4000;
efx[nefx].periodic.length = 5000;
efx[nefx].periodic.attack_length = 1000;
efx[nefx].periodic.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
printf("UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* Now we'll try a SAWTOOTHUP */
if (supported & SDL_HAPTIC_SAWTOOTHUP) {
printf(" effect %d: Sawtooth Up\n", nefx);
efx[nefx].type = SDL_HAPTIC_SQUARE;
efx[nefx].periodic.period = 500;
efx[nefx].periodic.magnitude = 0x5000;
efx[nefx].periodic.length = 5000;
efx[nefx].periodic.attack_length = 1000;
efx[nefx].periodic.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
printf("UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* Now the classical constant effect. */
if (supported & SDL_HAPTIC_CONSTANT) {
printf(" effect %d: Constant Force\n", nefx);
efx[nefx].type = SDL_HAPTIC_CONSTANT;
efx[nefx].constant.direction.type = SDL_HAPTIC_POLAR;
efx[nefx].constant.direction.dir[0] = 20000; /* Force comes from the south-west. */
efx[nefx].constant.length = 5000;
efx[nefx].constant.level = 0x6000;
efx[nefx].constant.attack_length = 1000;
efx[nefx].constant.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
printf("UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* The cute spring effect. */
if (supported & SDL_HAPTIC_SPRING) {
printf(" effect %d: Condition Spring\n", nefx);
efx[nefx].type = SDL_HAPTIC_SPRING;
efx[nefx].condition.length = 5000;
for (i = 0; i < SDL_HapticNumAxes(haptic); i++) {
efx[nefx].condition.right_sat[i] = 0x7FFF;
efx[nefx].condition.left_sat[i] = 0x7FFF;
efx[nefx].condition.right_coeff[i] = 0x2000;
efx[nefx].condition.left_coeff[i] = 0x2000;
efx[nefx].condition.center[i] = 0x1000; /* Displace the center for it to move. */
}
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
printf("UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* The pretty awesome inertia effect. */
if (supported & SDL_HAPTIC_INERTIA) {
printf(" effect %d: Condition Inertia\n", nefx);
efx[nefx].type = SDL_HAPTIC_SPRING;
efx[nefx].condition.length = 5000;
for (i = 0; i < SDL_HapticNumAxes(haptic); i++) {
efx[nefx].condition.right_sat[i] = 0x7FFF;
efx[nefx].condition.left_sat[i] = 0x7FFF;
efx[nefx].condition.right_coeff[i] = 0x2000;
efx[nefx].condition.left_coeff[i] = 0x2000;
}
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
printf("UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
printf
("\nNow playing effects for 5 seconds each with 1 second delay between\n");
for (i = 0; i < nefx; i++) {
printf(" Playing effect %d\n", i);
SDL_HapticRunEffect(haptic, id[i], 1);
SDL_Delay(6000); /* Effects only have length 5000 */
}
/* Quit */
if (haptic != NULL)
SDL_HapticClose(haptic);
SDL_Quit();
return 0;
}
static int
IN_Haptic_Effects_To_Id(int haptic_effect, int effect_volume, int effect_x, int effect_y, int effect_z)
{
if ((SDL_HapticQuery(joystick_haptic) & SDL_HAPTIC_SINE)==0)
return -1;
int hapric_volume = joy_haptic_magnitude->value * effect_volume * 16; // * 128 = 32767 max strength;
if (hapric_volume > 255)
hapric_volume = 255;
else if (hapric_volume < 0)
hapric_volume = 0;
switch(haptic_effect) {
case HAPTIC_EFFECT_MENY:
case HAPTIC_EFFECT_TRAPCOCK:
case HAPTIC_EFFECT_STEP:
/* North */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 48,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_PAIN:
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 700/* 700 ms*/, hapric_volume * 196,
300/* 0.3 seconds long */, 200/* Takes 0.2 second to get max strength */,
200/* Takes 0.2 second to fade away */);
case HAPTIC_EFFECT_BLASTER:
/* 30 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_HYPER_BLASTER:
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_ETFRIFLE:
/* 60 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_TRACKER:
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_MACHINEGUN:
/* 90 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 800/* 800 ms*/, hapric_volume * 88,
600/* 0.6 seconds long */, 200/* Takes 0.2 second to get max strength */,
400/* Takes 0.4 second to fade away */);
case HAPTIC_EFFECT_SHOTGUN:
/* 120 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 700/* 700 ms*/, hapric_volume * 100,
500/* 0.5 seconds long */, 100/* Takes 0.1 second to get max strength */,
200/* Takes 0.2 second to fade away */);
case HAPTIC_EFFECT_SHOTGUN2:
/* 150 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 700/* 700 ms*/, hapric_volume * 96,
500/* 0.5 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_SSHOTGUN:
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 700/* 700 ms*/, hapric_volume * 96,
500/* 0.5 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_RAILGUN:
/* 180 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 700/* 700 ms*/, hapric_volume * 64,
400/* 0.4 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_ROCKETGUN:
/* 210 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 700/* 700 ms*/, hapric_volume * 128,
400/* 0.4 seconds long */, 300/* Takes 0.3 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_GRENADE:
/* 240 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_BFG:
/* 270 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 800/* 800 ms*/, hapric_volume * 100,
600/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_PALANX:
/* 300 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
case HAPTIC_EFFECT_IONRIPPER:
/* 330 degrees */
return IN_Haptic_Effect_Init(
effect_x, effect_y, effect_z, 500/* 500 ms*/, hapric_volume * 64,
200/* 0.2 seconds long */, 100/* Takes 0.1 second to get max strength */,
100/* Takes 0.1 second to fade away */);
default:
return -1;
}
}
bool Joystick::setVibration(float left, float right, float duration)
{
left = std::min(std::max(left, 0.0f), 1.0f);
right = std::min(std::max(right, 0.0f), 1.0f);
if (left == 0.0f && right == 0.0f)
return setVibration();
if (!checkCreateHaptic())
return false;
Uint32 length = SDL_HAPTIC_INFINITY;
if (duration >= 0.0f)
{
float maxduration = std::numeric_limits<Uint32>::max() / 1000.0f;
length = Uint32(std::min(duration, maxduration) * 1000);
}
bool success = false;
unsigned int features = SDL_HapticQuery(haptic);
int axes = SDL_HapticNumAxes(haptic);
if ((features & SDL_HAPTIC_LEFTRIGHT) != 0)
{
memset(&vibration.effect, 0, sizeof(SDL_HapticEffect));
vibration.effect.type = SDL_HAPTIC_LEFTRIGHT;
vibration.effect.leftright.length = length;
vibration.effect.leftright.large_magnitude = Uint16(left * LOVE_UINT16_MAX);
vibration.effect.leftright.small_magnitude = Uint16(right * LOVE_UINT16_MAX);
success = runVibrationEffect();
}
// Some gamepad drivers only give support for controlling individual motors
// through a custom FF effect.
if (!success && isGamepad() && (features & SDL_HAPTIC_CUSTOM) && axes == 2)
{
// NOTE: this may cause issues with drivers which support custom effects
// but aren't similar to https://github.com/d235j/360Controller .
// Custom effect data is clamped to 0x7FFF in SDL.
vibration.data[0] = vibration.data[2] = Uint16(left * 0x7FFF);
vibration.data[1] = vibration.data[3] = Uint16(right * 0x7FFF);
memset(&vibration.effect, 0, sizeof(SDL_HapticEffect));
vibration.effect.type = SDL_HAPTIC_CUSTOM;
vibration.effect.custom.length = length;
vibration.effect.custom.channels = 2;
vibration.effect.custom.period = 10;
vibration.effect.custom.samples = 2;
vibration.effect.custom.data = vibration.data;
success = runVibrationEffect();
}
// Fall back to a simple sine wave if all else fails. This only supports a
// single strength value.
if (!success && (features & SDL_HAPTIC_SINE) != 0)
{
memset(&vibration.effect, 0, sizeof(SDL_HapticEffect));
vibration.effect.type = SDL_HAPTIC_SINE;
vibration.effect.periodic.length = length;
vibration.effect.periodic.period = 10;
float strength = std::max(left, right);
vibration.effect.periodic.magnitude = Sint16(strength * 0x7FFF);
success = runVibrationEffect();
}
if (success)
{
vibration.left = left;
vibration.right = right;
if (length == SDL_HAPTIC_INFINITY)
vibration.endtime = SDL_HAPTIC_INFINITY;
else
vibration.endtime = SDL_GetTicks() + length;
}
else
{
vibration.left = vibration.right = 0.0f;
vibration.endtime = SDL_HAPTIC_INFINITY;
}
return success;
}
ForceFeedback::ForceFeedback(
const std::string & device,
std::ostream & error_output,
std::ostream & info_output) :
device_name(device),
enabled(true),
lastforce(0),
haptic(0),
effect_id(-1)
{
// Close haptic if already open.
if (haptic)
{
SDL_HapticClose(haptic);
haptic = NULL;
}
// Do we have force feedback devices?
int haptic_num = SDL_NumHaptics();
if (haptic_num == 0)
{
info_output << "No force feedback devices found." << std::endl;
return;
}
info_output << "Number of force feedback devices: " << haptic_num << std::endl;
// Try to create haptic device.
int haptic_id = 0;
haptic = SDL_HapticOpen(haptic_id);
if (!haptic)
{
error_output << "Failed to initialize force feedback device: " << SDL_GetError();
return;
}
// Check for constant force support.
unsigned int haptic_query = SDL_HapticQuery(haptic);
if (!(haptic_query & SDL_HAPTIC_CONSTANT))
{
error_output << "Constant force feedback not supported: " << SDL_GetError();
return;
}
// Create the effect.
memset(&effect, 0, sizeof(SDL_HapticEffect) ); // 0 is safe default
effect.type = SDL_HAPTIC_CONSTANT;
effect.constant.direction.type = SDL_HAPTIC_CARTESIAN; // Using cartesian direction encoding.
effect.constant.direction.dir[0] = 1; // X position
effect.constant.direction.dir[1] = 0; // Y position
effect.constant.length = 0xffff;
effect.constant.delay = 0;
effect.constant.button = 0;
effect.constant.interval = 0;
effect.constant.level = 0;
effect.constant.attack_length = 0;
effect.constant.attack_level = 0;
effect.constant.fade_length = 0;
effect.constant.fade_level = 0;
// Upload the effect.
effect_id = SDL_HapticNewEffect(haptic, &effect);
if (effect_id == -1)
{
error_output << "Failed to initialize force feedback effect: " << SDL_GetError();
return;
}
info_output << "Force feedback enabled." << std::endl;
}
bool SDL2FFBDevice::queryDeviceCapabilities()
{
unsigned int caps;
bool hasPeriodic = false;
bool hasCondition = false;
caps = SDL_HapticQuery(c_haptic);
if (caps == 0)
return false;
if (caps & SDL_HAPTIC_CONSTANT)
m_availableEffects.push_back(FFBEffectTypes::CONSTANT);
if (caps & SDL_HAPTIC_SINE) {
hasPeriodic = true;
m_availablePeriodicWaveforms.push_back(PeriodicWaveforms::SINE);
}
if (caps & SDL_HAPTIC_TRIANGLE) {
hasPeriodic = true;
m_availablePeriodicWaveforms.push_back(PeriodicWaveforms::TRIANGLE);
}
if (caps & SDL_HAPTIC_SAWTOOTHUP) {
hasPeriodic = true;
m_availablePeriodicWaveforms.push_back(PeriodicWaveforms::SAW_UP);
}
if (caps & SDL_HAPTIC_SAWTOOTHDOWN) {
hasPeriodic = true;
m_availablePeriodicWaveforms.push_back(PeriodicWaveforms::SAW_DOWN);
}
if (hasPeriodic)
m_availableEffects.push_back(FFBEffectTypes::PERIODIC);
if (caps & SDL_HAPTIC_RAMP)
m_availableEffects.push_back(FFBEffectTypes::RAMP);
if (caps & SDL_HAPTIC_SPRING) {
hasCondition = true;
m_availableConditionSubtypes.push_back(ConditionSubtypes::SPRING);
}
if (caps & SDL_HAPTIC_DAMPER) {
hasCondition = true;
m_availableConditionSubtypes.push_back(ConditionSubtypes::DAMPER);
}
if (caps & SDL_HAPTIC_INERTIA) {
hasCondition = true;
m_availableConditionSubtypes.push_back(ConditionSubtypes::INERTIA);
}
if (caps & SDL_HAPTIC_FRICTION) {
hasCondition = true;
m_availableConditionSubtypes.push_back(ConditionSubtypes::FRICTION);
}
if (hasCondition)
m_availableEffects.push_back(FFBEffectTypes::CONDITION);
if (caps & SDL_HAPTIC_GAIN)
m_adjustableGain = true;
if (caps & SDL_HAPTIC_AUTOCENTER)
m_adjustableAC = true;
return true;
}
// First time (lazy) initialization.
void
gfctrlJoyInit(void)
{
#ifndef SDL_JOYSTICK
gfctrlJoyPresent = GFCTRL_JOY_NONE;
for (int index = 0; index < GFCTRL_JOY_NUMBER; index++) {
if (!Joysticks[index]) {
Joysticks[index] = new jsJoystick(index);
}
// Don't configure the joystick if it doesn't work
if (Joysticks[index]->notWorking()) {
delete Joysticks[index];
Joysticks[index] = 0;
} else {
gfctrlJoyPresent = GFCTRL_JOY_PRESENT;
}
}
#else
#if SDL_MAJOR_VERSION >= 2
memset(&cfx, 0, sizeof(cfx));
if (SDL_InitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_HAPTIC) < 0) {
#else
if (SDL_Init(SDL_INIT_JOYSTICK) < 0) {
#endif
GfLogError("Couldn't initialize SDL: %s\n", SDL_GetError());
gfctrlJoyPresent = GFCTRL_JOY_UNTESTED;
return;
}
#if SDL_MAJOR_VERSION >= 2
// Ignore the joystick events, we will poll directly as it is faster
SDL_JoystickEventState(SDL_IGNORE);
#endif
gfctrlJoyPresent = SDL_NumJoysticks();
if (gfctrlJoyPresent > GFCTRL_JOY_NUMBER) gfctrlJoyPresent = GFCTRL_JOY_NUMBER;
for (int index = 0; index < gfctrlJoyPresent; index++) {
if (!Joysticks[index]) {
Joysticks[index] = SDL_JoystickOpen(index);
}
// Don't configure the joystick if it doesn't work
if (Joysticks[index] == NULL) {
GfLogError("Couldn't open joystick %d: %s\n", index, SDL_GetError());
#if SDL_MAJOR_VERSION >= 2
} else {
cfx_timeout[index] = 0;
rfx_timeout[index] = 0;
// Find which Haptic device relates to this joystick
Haptics[index] = SDL_HapticOpenFromJoystick(Joysticks[index]);
if (!Haptics[index]) {
GfLogInfo("Joystick %d does not support haptic\n", index);
break;
#if 0
} else {
// add an CF effect on startup
gfctrlJoyConstantForce(index, 50000, 9000);
#endif
}
// Check for Rumble capability
if (SDL_HapticRumbleSupported(Haptics[index]) == SDL_TRUE) {
if (SDL_HapticRumbleInit(Haptics[index]) != 0)
GfLogError("Couldn't init rumble on joystick %d: %s\n", index, SDL_GetError());
#if 0
else
gfctrlJoyRumble(index, 0.5);
#endif
}
#endif
}
}
#endif
}
#if SDL_JOYSTICK
void
gfctrlJoyConstantForce(int index, unsigned int level, int dir)
{
#if SDL_MAJOR_VERSION >= 2
if (!Haptics[index]) return;
if ((SDL_HapticQuery(Haptics[index]) & SDL_HAPTIC_CONSTANT) == 0) return;
cfx[index].type = SDL_HAPTIC_CONSTANT;
cfx[index].constant.direction.type = SDL_HAPTIC_POLAR;
cfx[index].constant.direction.dir[0] = dir;
cfx[index].constant.length = 1000;
cfx[index].constant.level = level;
cfx[index].constant.attack_length = 0;
cfx[index].constant.fade_length = 1000;
#if __WIN32__
if (SDL_HapticGetEffectStatus(Haptics[index], id[index]) == SDL_TRUE)
#else
// Linux SDL doesn't support checking status at the moment :-(
if (cfx_timeout[index] > SDL_GetTicks())
#endif
SDL_HapticUpdateEffect(Haptics[index], id[index], &cfx[index]);
else {
SDL_HapticDestroyEffect(Haptics[index], id[index]);
id[index] = SDL_HapticNewEffect(Haptics[index], &cfx[index]);
SDL_HapticRunEffect(Haptics[index], id[index], 1);
}
cfx_timeout[index] = SDL_GetTicks() + cfx[index].constant.length;
#endif
}
void
gfctrlJoyRumble(int index, float level)
{
#if SDL_MAJOR_VERSION >= 2
if (!Haptics[index]) return;
if (SDL_HapticRumbleSupported(Haptics[index]) != SDL_TRUE) return;
// we have to stop the rumble before updating
if (rfx_timeout[index] > SDL_GetTicks()) {
if (SDL_HapticRumbleStop(Haptics[index]) != 0)
GfLogError("Failed to stop rumble: %s\n", SDL_GetError() );
}
if (SDL_HapticRumblePlay(Haptics[index], level, 100) != 0)
GfLogError("Failed to play rumble: %s\n", SDL_GetError() );
rfx_timeout[index] = SDL_GetTicks() + 100;
#endif
}
#endif
// Shutdown time.
void
gfctrlJoyShutdown(void)
{
if (gfctrlJoyPresent != GFCTRL_JOY_UNTESTED)
#ifndef SDL_JOYSTICK
for (int index = 0; index < GFCTRL_JOY_NUMBER; index++)
delete Joysticks[index];
#else
for (int index = 0; index < gfctrlJoyPresent; index++) {
SDL_JoystickClose(Joysticks[index]);
Joysticks[index] = NULL;
#if SDL_MAJOR_VERSION >= 2
if (Haptics[index]) {
SDL_HapticClose(Haptics[index]);
Haptics[index] = NULL;
}
#endif
}
#endif
gfctrlJoyPresent = GFCTRL_JOY_UNTESTED;
}
/** Create the joystick control
@ingroup ctrl
@return pointer on a tCtrlJoyInfo structure
<br>0 .. if no joystick present
@note call GfctrlJoyRelease to free the tCtrlJoyInfo structure
@see GfctrlJoyRelease
@see tCtrlJoyInfo
*/
tCtrlJoyInfo *
GfctrlJoyCreate(void)
{
if (gfctrlJoyPresent == GFCTRL_JOY_UNTESTED)
gfctrlJoyInit();
tCtrlJoyInfo* joyInfo = (tCtrlJoyInfo *)calloc(1, sizeof(tCtrlJoyInfo));
#if SDL_JOYSTICK
joyInfoCopy = joyInfo;
#endif
return joyInfo;
}
/** Release the tCtrlJoyInfo structure
@ingroup ctrl
@param joyInfo joystick structure
@return none
*/
void
GfctrlJoyRelease(tCtrlJoyInfo *joyInfo)
{
freez(joyInfo);
}
/**
* @brief The entry point of this force feedback demo.
* @param[in] argc Number of arguments.
* @param[in] argv Array of argc arguments.
*/
int
main(int argc, char **argv)
{
int i;
char *name;
int index;
SDL_HapticEffect efx[9];
int id[9];
int nefx;
unsigned int supported;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
name = NULL;
index = -1;
if (argc > 1) {
name = argv[1];
if ((strcmp(name, "--help") == 0) || (strcmp(name, "-h") == 0)) {
SDL_Log("USAGE: %s [device]\n"
"If device is a two-digit number it'll use it as an index, otherwise\n"
"it'll use it as if it were part of the device's name.\n",
argv[0]);
return 0;
}
i = strlen(name);
if ((i < 3) && isdigit(name[0]) && ((i == 1) || isdigit(name[1]))) {
index = atoi(name);
name = NULL;
}
}
/* Initialize the force feedbackness */
SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_JOYSTICK |
SDL_INIT_HAPTIC);
SDL_Log("%d Haptic devices detected.\n", SDL_NumHaptics());
if (SDL_NumHaptics() > 0) {
/* We'll just use index or the first force feedback device found */
if (name == NULL) {
i = (index != -1) ? index : 0;
}
/* Try to find matching device */
else {
for (i = 0; i < SDL_NumHaptics(); i++) {
if (strstr(SDL_HapticName(i), name) != NULL)
break;
}
if (i >= SDL_NumHaptics()) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to find device matching '%s', aborting.\n",
name);
return 1;
}
}
haptic = SDL_HapticOpen(i);
if (haptic == NULL) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to create the haptic device: %s\n",
SDL_GetError());
return 1;
}
SDL_Log("Device: %s\n", SDL_HapticName(i));
HapticPrintSupported(haptic);
} else {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "No Haptic devices found!\n");
return 1;
}
/* We only want force feedback errors. */
SDL_ClearError();
/* Create effects. */
memset(&efx, 0, sizeof(efx));
nefx = 0;
supported = SDL_HapticQuery(haptic);
SDL_Log("\nUploading effects\n");
/* First we'll try a SINE effect. */
if (supported & SDL_HAPTIC_SINE) {
SDL_Log(" effect %d: Sine Wave\n", nefx);
efx[nefx].type = SDL_HAPTIC_SINE;
efx[nefx].periodic.period = 1000;
efx[nefx].periodic.magnitude = -0x2000; /* Negative magnitude and ... */
efx[nefx].periodic.phase = 18000; /* ... 180 degrees phase shift => cancel eachother */
efx[nefx].periodic.length = 5000;
efx[nefx].periodic.attack_length = 1000;
efx[nefx].periodic.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* Now we'll try a SAWTOOTHUP */
if (supported & SDL_HAPTIC_SAWTOOTHUP) {
SDL_Log(" effect %d: Sawtooth Up\n", nefx);
efx[nefx].type = SDL_HAPTIC_SAWTOOTHUP;
efx[nefx].periodic.period = 500;
efx[nefx].periodic.magnitude = 0x5000;
efx[nefx].periodic.length = 5000;
efx[nefx].periodic.attack_length = 1000;
efx[nefx].periodic.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* Now the classical constant effect. */
if (supported & SDL_HAPTIC_CONSTANT) {
SDL_Log(" effect %d: Constant Force\n", nefx);
efx[nefx].type = SDL_HAPTIC_CONSTANT;
efx[nefx].constant.direction.type = SDL_HAPTIC_POLAR;
efx[nefx].constant.direction.dir[0] = 20000; /* Force comes from the south-west. */
efx[nefx].constant.length = 5000;
efx[nefx].constant.level = 0x6000;
efx[nefx].constant.attack_length = 1000;
efx[nefx].constant.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* The cute spring effect. */
if (supported & SDL_HAPTIC_SPRING) {
SDL_Log(" effect %d: Condition Spring\n", nefx);
efx[nefx].type = SDL_HAPTIC_SPRING;
efx[nefx].condition.length = 5000;
for (i = 0; i < SDL_HapticNumAxes(haptic); i++) {
efx[nefx].condition.right_sat[i] = 0xFFFF;
efx[nefx].condition.left_sat[i] = 0xFFFF;
efx[nefx].condition.right_coeff[i] = 0x2000;
efx[nefx].condition.left_coeff[i] = 0x2000;
efx[nefx].condition.center[i] = 0x1000; /* Displace the center for it to move. */
}
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* The interesting damper effect. */
if (supported & SDL_HAPTIC_DAMPER) {
SDL_Log(" effect %d: Condition Damper\n", nefx);
efx[nefx].type = SDL_HAPTIC_DAMPER;
efx[nefx].condition.length = 5000;
for (i = 0; i < SDL_HapticNumAxes(haptic); i++) {
efx[nefx].condition.right_sat[i] = 0xFFFF;
efx[nefx].condition.left_sat[i] = 0xFFFF;
efx[nefx].condition.right_coeff[i] = 0x2000;
efx[nefx].condition.left_coeff[i] = 0x2000;
}
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* The pretty awesome inertia effect. */
if (supported & SDL_HAPTIC_INERTIA) {
SDL_Log(" effect %d: Condition Inertia\n", nefx);
efx[nefx].type = SDL_HAPTIC_INERTIA;
efx[nefx].condition.length = 5000;
for (i = 0; i < SDL_HapticNumAxes(haptic); i++) {
efx[nefx].condition.right_sat[i] = 0xFFFF;
efx[nefx].condition.left_sat[i] = 0xFFFF;
efx[nefx].condition.right_coeff[i] = 0x2000;
efx[nefx].condition.left_coeff[i] = 0x2000;
efx[nefx].condition.deadband[i] = 0x1000; /* 1/16th of axis-range around the center is 'dead'. */
}
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* The hot friction effect. */
if (supported & SDL_HAPTIC_FRICTION) {
SDL_Log(" effect %d: Condition Friction\n", nefx);
efx[nefx].type = SDL_HAPTIC_FRICTION;
efx[nefx].condition.length = 5000;
for (i = 0; i < SDL_HapticNumAxes(haptic); i++) {
efx[nefx].condition.right_sat[i] = 0xFFFF;
efx[nefx].condition.left_sat[i] = 0xFFFF;
efx[nefx].condition.right_coeff[i] = 0x2000;
efx[nefx].condition.left_coeff[i] = 0x2000;
}
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* Now we'll try a ramp effect */
if (supported & SDL_HAPTIC_RAMP) {
SDL_Log(" effect %d: Ramp\n", nefx);
efx[nefx].type = SDL_HAPTIC_RAMP;
efx[nefx].ramp.direction.type = SDL_HAPTIC_CARTESIAN;
efx[nefx].ramp.direction.dir[0] = 1; /* Force comes from */
efx[nefx].ramp.direction.dir[1] = -1; /* the north-east. */
efx[nefx].ramp.length = 5000;
efx[nefx].ramp.start = 0x4000;
efx[nefx].ramp.end = -0x4000;
efx[nefx].ramp.attack_length = 1000;
efx[nefx].ramp.fade_length = 1000;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
/* Finally we'll try a left/right effect. */
if (supported & SDL_HAPTIC_LEFTRIGHT) {
SDL_Log(" effect %d: Left/Right\n", nefx);
efx[nefx].type = SDL_HAPTIC_LEFTRIGHT;
efx[nefx].leftright.length = 5000;
efx[nefx].leftright.large_magnitude = 0x3000;
efx[nefx].leftright.small_magnitude = 0xFFFF;
id[nefx] = SDL_HapticNewEffect(haptic, &efx[nefx]);
if (id[nefx] < 0) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "UPLOADING EFFECT ERROR: %s\n", SDL_GetError());
abort_execution();
}
nefx++;
}
SDL_Log
("\nNow playing effects for 5 seconds each with 1 second delay between\n");
for (i = 0; i < nefx; i++) {
SDL_Log(" Playing effect %d\n", i);
SDL_HapticRunEffect(haptic, id[i], 1);
SDL_Delay(6000); /* Effects only have length 5000 */
}
/* Quit */
if (haptic != NULL)
SDL_HapticClose(haptic);
SDL_Quit();
return 0;
}