Unigine::ControlsJoystick Class
| Header: | #include <UnigineControls.h> |
| Inherits from: | Controls |
This class handles joystick input. Generic joysticks can be hot-plugged. So, you can connect your joystick before or after create an instance of this class.
The ControlsJoystick class provides access to the following controller input:
- Axes detect movement along X and Y axes (if a joystick is two-axis, which is the most typical case) and along Z axis (if it is three-axis one). Two-axis joysticks are configured in such a way that left-to-right movement of the stick is mapped to the movement along the X axis, while movement from backward to forward (down-up) indicates movement along the Y axis. In case of 3D joystick, twisting the stick to the left (counter-clockwise) or to the right (clockwise) corresponds to movement along the Z axis.
Axes are quired for their states via getAxis(). To provide smooth interpolation between frames and avoid jerks, axis values can be filtered via setFilter(). - Buttons correspond to the each button on the controller and can be either pressed or unpressed. Just in case with mouse/keyboard controls, they can be mapped to the specific controls states to bind input events and programmed actions.
You can either bind buttons in the code via setStateButton() or let the user assign the button for a control state via getStateEvent(). - POV (Point-Of-View) hat switches indicate the direction of view and support a number of positions such as left, right, up and down (similar to a D-pad).
A joystick should update the physical state of all its input controls (i.e. check whether the user has pressed the button, for example) each frame using updateEvents().
See also#
A UnigineScript API sample <UnigineSDK>/data/samples/controls/joystick_00
ControlsJoystick Class
Enums
POV#
POV (Point-of-View) switch or DPad states.Members
static ControlsJoystickPtr create ( int num ) #
Constructor. Creates a new joystick.Arguments
- int num - Joystick number.
bool isAvailable ( ) const#
Checks if the joystick is available.Return value
1 if the joystick is available; otherwise, 0.float getAxis ( int axis ) const#
Returns a state value of a given axis. It includes position of the joystick along the following axes: X, Y (two-axis joystick) and Z (three-axis joystick). When a joystick is in the center position, X and Y axes values are zero. Negative values indicate left or down; positive values indicate right or up.Arguments
- int axis - Axis number.
Return value
Value in range [-1; 1].const char * getAxisName ( int axis ) const#
Returns the name of a given axis.Arguments
- int axis - Axis number.
Return value
Axis name.int getButton ( int button ) const#
Returns a button state (pressed or not pressed).Arguments
- int button - Button number.
Return value
1 if the button is pressed; otherwise, 0.const char * getButtonName ( int button ) const#
Returns the name of a given button.Arguments
- int button - Button number.
Return value
Button name.void setFilter ( float filter ) #
Sets a filter value used to correct the current state of the joystick axis relative to the previous one.Arguments
- float filter - Filter value for interpolation between axis states. The provided value is clamped to a range [0;1].
- Filter value of 0 means there is no interpolation and the current value is not corrected.
- Filter value of 1 means the previous state is used instead of the current one.
float getFilter ( ) const#
Returns a filter value used to correct the current state of the joystick axis relative to the previous one:- Filter value of 0 means there is no interpolation and the current value is not corrected.
- Filter value of 1 means the previous state is used instead of the current one.
Return value
Filter value for interpolation between axis states.const char * getName ( ) const#
Returns the name of the joystick.Return value
Joystick name.int getNumAxes ( ) const#
Returns the number of axes supported by the joystick.Return value
The number of axes.int getNumber ( ) const#
Returns the joystick number. There can be several joysticks connected, this number is used to identify a particular one.Return value
Joystick number.int getNumButtons ( ) const#
Returns the number of buttons supported by the joystick.Return value
The number of buttons.int getNumPovs ( ) const#
Returns the number of POV hat switches supported by the joystick.Return value
The number of POV hats.ControlsJoystick::POV getPov ( int pov ) const#
Returns a POV hat switch state. POV hats support the following positions: left, right, up and down.Arguments
- int pov - POV pad number.
Return value
One of the following:- -1 — not pressed
- 0 — pressed "up"
- 4500 — pressed "up" and "right"
- 9000 — pressed "right"
- 13500 — pressed "down" and "right"
- 18000 — pressed "down"
- 22500 — pressed "down" and "left"
- 27000 — pressed "left"
- 31500 — pressed "up" and "left"
const char * getPovName ( int pov ) const#
Returns the name of a given POV hat switch.Arguments
- int pov - POV hat number.
Return value
POV hat name.void setStateButton ( int state, int button ) #
Sets a joystick button that switches a given state on or off.Arguments
- int state - State (one of the CONTROLS_STATE_* variables).
- int button - Button number.
int getStateButton ( int state ) const#
Returns a game pad button that switches a given state on and off.Arguments
- int state - State (one of the CONTROLS_STATE_* variables).
Return value
Button that switches the given state.void getStateEvent ( int state ) #
Lets the user assign a joystick button to a given state.Arguments
- int state - State (one of the CONTROLS_STATE_* variables), to which a button is going to be assigned.
int isStateEvent ( ) const#
Returns a value indicating if a joystick button is successfully assigned to a state.Return value
1 if a button is already assigned; otherwise, 0.String getStateName ( int state ) const#
Returns the name of a given state, that was assigned to one of controls.Arguments
- int state - State (one of the CONTROLS_STATE_* variables).
Return value
State name.int clearButton ( int button ) #
Returns a button state and clears it to 0 (not pressed).Arguments
- int button - Button number.
Return value
1 if the button is pressed, and this function was not called previously in the current frame; otherwise, 0.bool saveState ( const Ptr<Stream> & stream ) const#
Saves ControlsJoystick settings into the stream.Example using saveState() and restoreState() methods:
Source code (C++)
// initialize a node and set its state
ControlsJoystickPtr joystick = ControlsJoystick::create(1);
joystick->setStateButton(0,1);
// save state
BlobPtr blob_state = Blob::create();
joystick->saveState(blob_state);
// change state
joystick->setStateButton(2,1);
// restore state
blob_state->seekSet(0); // returning the carriage to the start of the blob
joystick->restoreState(blob_state);Arguments
Return value
true if the ControlsJoystick settings are saved successfully; otherwise, false.bool restoreState ( const Ptr<Stream> & stream ) #
Restores ControlsJoystick settings from the stream.Example using saveState() and restoreState() methods:
Source code (C++)
// initialize a node and set its state
ControlsJoystickPtr joystick = ControlsJoystick::create(1);
joystick->setStateButton(0,1);
// save state
BlobPtr blob_state = Blob::create();
joystick->saveState(blob_state);
// change state
joystick->setStateButton(2,1);
// restore state
blob_state->seekSet(0); // returning the carriage to the start of the blob
joystick->restoreState(blob_state);Arguments
Return value
true if the ControlsJoystick settings are restored successfully; otherwise, false.int updateEvents ( ) #
Scans the joystick controls (synchronizes joystick button states with the controller itself). Should be called each frame.Notice
On Windows, in case a joystick is not connected, this function can substantially increase per-frame update time. (This happens due to calling
IDirectInput8::EnumDevices() method.)
Return value
0 if a joystick is not found or updateEvents() already has been called for the frame; otherwise 1.int getPlayerIndex ( ) const#
Returns the index of player for the joystick. Some devices support connection of multiple players (e.g., XBox 360 supports up to four players connected through XBox 360 gamepads). This method enables you to get this index.Return value
Player index for the joystick.int getDeviceType ( ) const#
Returns a value indicating the type of the device (wheel, throttle, etc.).Return value
Device type. One of the DEVICE_TYPE_* values of the Input class.float getAxisInitialValue ( int axis ) const#
Returns an initial value for the specified axis.Arguments
- int axis - Axis number.
Return value
Current initial value used for the specified axis.const char * getGuid ( ) const#
Returns the GUID created on the basis of vendor and product identifiers and product version number. It enables you to identify device model (Controller XBox One, etc.), however, it will be the same for two identical models.Return value
Device model GUID.int getVendor ( ) const#
Returns a unique identifier of the device manufacturer (vendor). This can be very useful in case your application uses non-standard custom input devices to ensure proper configuration (dead zones, inverse flags, correction curves, etc.).Return value
Unique identifier of the device manufacturer (vendor).int getProduct ( ) const#
Returns a unique identifier for the product (GUID). This identifier is established by the manufacturer of the device. This can be very useful in case your application uses non-standard custom input devices to ensure proper configuration (dead zones, inverse flags, correction curves, etc.).Return value
Unique identifier for the product (GUID).int getProductVersion ( ) const#
Returns the version of the product established by the manufacturer of the device. This can be very useful in case your application uses non-standard custom input devices to ensure proper configuration (dead zones, inverse flags, correction curves, etc.).Return value
Version of the product established by the manufacturer of the device.Last update:
14.12.2022
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