/// <summary>Initializes a new DirectInput state converter</summary>
/// <param name="joystick">Joystick for which the converter will be used</param>
internal DirectInputConverter(Joystick joystick)
{
this.sliderReaders = new ISliderReader[8];
this.axisReaders = new IAxisReader[24];
this.buttonCount = joystick.Capabilities.ButtonCount;
this.povCount = joystick.Capabilities.PovCount;
mapAxes(joystick);
mapSliders(joystick);
}
/// <summary>Initializes a new DirectInput-based game pad</summary>
/// <param name="joystick">The DirectInput joystick this instance will query</param>
/// <param name="checkAttachedDelegate">
/// Delegate through which the instance can check if the device is attached
/// </param>
public DirectInputGamePad(
Joystick joystick, CheckAttachedDelegate checkAttachedDelegate
)
{
this.joystick = joystick;
this.checkAttachedDelegate = checkAttachedDelegate;
this.states = new LeakyQueue<JoystickState>();
this.converter = new DirectInputConverter(this.joystick);
// Ensure the leaky queue has created its array
ensureSlotAvailable();
}
/// <summary>Initializes a new DirectInput-based game pad</summary>
/// <param name="joystick">The DirectInput joystick this instance will query</param>
/// <param name="checkAttachedDelegate">
/// Delegate through which the instance can check if the device is attached
/// </param>
public DirectInputGamePad(
Joystick joystick, CheckAttachedDelegate checkAttachedDelegate
) {
this.joystick = joystick;
this.checkAttachedDelegate = checkAttachedDelegate;
this.states = new Queue<GamePadState>();
this.currentJoystickState = new JoystickState();
this.current = new GamePadState();
this.converter = new GamePadConverter(this.joystick);
}
/// <summary>Initializes a new game pad converter</summary>
/// <param name="joystick">Joystick whose data will be converted</param>
public GamePadConverter(Joystick joystick) {
this.joystick = joystick;
this.gamePadState = new FlatGamePadState();
this.axisCount = Math.Min(this.joystick.Capabilities.AxesCount, 4);
this.hasPovHat = (this.joystick.Capabilities.PovCount > 0);
if (this.hasPovHat) {
this.buttonCount = Math.Min(this.joystick.Capabilities.ButtonCount, 10);
} else {
this.buttonCount = Math.Min(this.joystick.Capabilities.ButtonCount, 14);
}
this.convertDelegate = convertButtonsAndPov;
addAxisConverters();
addSliderConverters();
}
/// <summary>Creates an axis reader for the specified object</summary>
/// <param name="joystick">Joystick providing the control object</param>
/// <param name="axis">Axis a reader will be created for</param>
/// <param name="control">Control description for the axis</param>
/// <returns>A new axis reader for the specified axis</returns>
private static IAxisReader createAxisReader(
Joystick joystick, ExtendedAxes axis, DeviceObjectInstance control
)
{
int id = (int)control.ObjectType;
ObjectProperties properties = joystick.GetObjectPropertiesById(id);
int min = properties.LowerRange;
int max = properties.UpperRange;
switch (axis) {
case ExtendedAxes.X: {
return new XAxisReader(min, max);
}
case ExtendedAxes.Y: {
return new YAxisReader(min, max);
}
case ExtendedAxes.Z: {
return new ZAxisReader(min, max);
}
case ExtendedAxes.VelocityX: {
return new VelocityXAxisReader(min, max);
}
case ExtendedAxes.VelocityY: {
return new VelocityYAxisReader(min, max);
}
case ExtendedAxes.VelocityZ: {
return new VelocityZAxisReader(min, max);
}
case ExtendedAxes.AccelerationX: {
return new AccelerationXAxisReader(min, max);
}
case ExtendedAxes.AccelerationY: {
return new AccelerationYAxisReader(min, max);
}
case ExtendedAxes.AccelerationZ: {
return new AccelerationZAxisReader(min, max);
}
case ExtendedAxes.ForceX: {
return new ForceXAxisReader(min, max);
}
case ExtendedAxes.ForceY: {
return new ForceYAxisReader(min, max);
}
case ExtendedAxes.ForceZ: {
return new ForceZAxisReader(min, max);
}
case ExtendedAxes.RotationX: {
return new RotationXAxisReader(min, max);
}
case ExtendedAxes.RotationY: {
return new RotationYAxisReader(min, max);
}
case ExtendedAxes.RotationZ: {
return new RotationZAxisReader(min, max);
}
case ExtendedAxes.AngularVelocityX: {
return new AngularVelocityXAxisReader(min, max);
}
case ExtendedAxes.AngularVelocityY: {
return new AngularVelocityYAxisReader(min, max);
}
case ExtendedAxes.AngularVelocityZ: {
return new AngularVelocityZAxisReader(min, max);
}
case ExtendedAxes.AngularAccelerationX: {
return new AngularAccelerationXAxisReader(min, max);
}
case ExtendedAxes.AngularAccelerationY: {
return new AngularAccelerationYAxisReader(min, max);
}
case ExtendedAxes.AngularAccelerationZ: {
return new AngularAccelerationZAxisReader(min, max);
}
case ExtendedAxes.TorqueX: {
return new TorqueXAxisReader(min, max);
}
case ExtendedAxes.TorqueY: {
return new TorqueYAxisReader(min, max);
}
case ExtendedAxes.TorqueZ: {
return new TorqueZAxisReader(min, max);
}
default: {
return null;
}
}
}
/// <summary>Creates a slider reader for the specified object</summary>
/// <param name="joystick">Joystick providing the control object</param>
/// <param name="slider">Slider a reader will be created for</param>
/// <param name="control">Control description for the axis</param>
/// <returns>A new slider reader for the specified axis</returns>
private static ISliderReader createSliderReader(
Joystick joystick, ExtendedSliders slider, DeviceObjectInstance control
)
{
int id = (int)control.ObjectType;
ObjectProperties properties = joystick.GetObjectPropertiesById(id);
int min = properties.LowerRange;
int max = properties.UpperRange;
switch (slider) {
case ExtendedSliders.Slider1: {
return new SliderReader(0, min, max);
}
case ExtendedSliders.Slider2: {
return new SliderReader(1, min, max);
}
case ExtendedSliders.Velocity1: {
return new VelocitySliderReader(0, min, max);
}
case ExtendedSliders.Velocity2: {
return new VelocitySliderReader(1, min, max);
}
case ExtendedSliders.Acceleration1: {
return new AccelerationSliderReader(0, min, max);
}
case ExtendedSliders.Acceleration2: {
return new AccelerationSliderReader(1, min, max);
}
case ExtendedSliders.Force1: {
return new ForceSliderReader(0, min, max);
}
case ExtendedSliders.Force2: {
return new ForceSliderReader(1, min, max);
}
default: {
return null;
}
}
}
/// <summary>Maps the sliders of the joystick</summary>
/// <param name="joystick">Joystick for which sliders are mapped</param>
private void mapSliders(Joystick joystick)
{
IList<DeviceObjectInstance> sliders = joystick.GetObjects(
ObjectDeviceType.AbsoluteAxis
);
var unmappedReaders = new Queue<ISliderReader>();
for (int index = 0; index < sliders.Count; ++index) {
if (sliders[index].ObjectTypeGuid == ObjectGuid.Slider) {
ExtendedSliders slider = identifySlider(
sliders[index].Aspect, sliders[index].ObjectTypeGuid
);
// If this slider could not be identified but were still missing one
// of the two standard sliders, remember it so we can use it in case
// no exact matches are found for sliders 1 and 2.
if (slider == 0) {
if (unmappedReaders.Count < 2) {
unmappedReaders.Enqueue(createSliderReader(joystick, slider, sliders[index]));
}
} else { // Slider was identified, assign it to the next free slot
if ((this.availableSliders & slider) != 0) {
++slider;
if ((this.availableSliders & slider) != 0) {
slider = 0;
}
}
}
// If we identified this slider (exactly or by fallback), build a reader
// for it and store it in the appropriate slot.
if (slider != 0) {
this.availableSliders |= slider;
this.sliderReaders[indexFromSlider(slider)] = createSliderReader(
joystick, slider, sliders[index]
);
}
} // if
} // for
// If sliders 1 and/or 2 are still not provided, use the unidentified
// sliders we remembered earlier as a fallback solution. These could very
// well be null, too, in which case the sliders simply aren't there.
if ((this.sliderReaders[0] == null) && (unmappedReaders.Count > 0)) {
this.availableSliders |= ExtendedSliders.Slider1;
this.sliderReaders[0] = unmappedReaders.Dequeue();
}
if ((this.sliderReaders[1] == null) && (unmappedReaders.Count > 0)) {
this.availableSliders |= ExtendedSliders.Slider2;
this.sliderReaders[1] = unmappedReaders.Dequeue();
}
}
/// <summary>Maps the axes of the joystick</summary>
/// <param name="joystick">Joystick for which axes are mapped</param>
private void mapAxes(Joystick joystick)
{
IList<DeviceObjectInstance> axes = joystick.GetObjects(
ObjectDeviceType.AbsoluteAxis
);
var unmappedReaders = new Queue<IAxisReader>();
for (int index = 0; index < axes.Count; ++index) {
if (axes[index].ObjectTypeGuid != ObjectGuid.Slider) {
ExtendedAxes axis = identifyAxis(
axes[index].Aspect, axes[index].ObjectTypeGuid
);
// If this axis could not be identified but we're still missing one of
// the standard axes (X, Y, Rx, Ry), remember it so we can later map it
// to the next unassigned standard axes in case some are left unassigned.
if (axis == 0) {
if (unmappedReaders.Count < 4) {
unmappedReaders.Enqueue(createAxisReader(joystick, axis, axes[index]));
}
} else { // Axis identified, build reader and store it
this.availableAxes |= axis;
this.axisReaders[indexFromAxis(axis)] = createAxisReader(
joystick, axis, axes[index]
);
}
} // if
} // for
// If the four standard axes are still not completely provided, use
// the unidentified axis we remembered earlier as a fallback solution.
if ((this.axisReaders[0] == null) && (unmappedReaders.Count > 0)) {
this.availableAxes |= ExtendedAxes.X;
this.axisReaders[0] = unmappedReaders.Dequeue();
}
if ((this.axisReaders[1] == null) && (unmappedReaders.Count > 0)) {
this.availableAxes |= ExtendedAxes.Y;
this.axisReaders[1] = unmappedReaders.Dequeue();
}
if ((this.axisReaders[12] == null) && (unmappedReaders.Count > 0)) {
this.availableAxes |= ExtendedAxes.RotationX;
this.axisReaders[12] = unmappedReaders.Dequeue();
}
if ((this.axisReaders[13] == null) && (unmappedReaders.Count > 0)) {
this.availableAxes |= ExtendedAxes.RotationY;
this.axisReaders[13] = unmappedReaders.Dequeue();
}
}
//Disposes of SDL
static void Cleanup()
{
Joystick.Cleanup();
running = false;
}