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Unigine::ControlsGamepad Class

Header: #include <UnigineControls.h>
Inherits from: Controls

This class handles game pads input (XBox 360, Xbox One, Sixaxis, etc.). It provides access to the following controller properties:

  • Buttons represent digital buttons on the controller and can be either pressed or unpressed. Just like in the case of 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().
  • D-pad is represented as four directional buttons (left, right, up and down). They are handled in the same way as other buttons.
  • Thumbsticks are left and right analog directional sticks on the controller. They are queried via getLeftX() and getLeftY() for the left thumbstick and getRightX() and getRightY() for the right one. Thumbsticks also act as two digital buttons when pressed (i.e. the stick is "clicked" in). In this case, they are handled in the same way as other buttons.
  • Triggers are two analog controls that can be queried for their states via getLeftTrigger() and getRightTrigger().
  • Vibration motors allow to set vibration effects. The left motor is a low-frequency rumble motor, while the right motor is a high-frequency one. The amount of vibration for each of the motors can be set via the setVibration() method.

Input data from analog controls (thumbsticks and triggers) can be additionally filtered via setFilter() to provide smooth interpolation between frames and avoid jerks.
A controller 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().

ControlsGamepad Class

Members


static ControlsGamepadPtr create ( int num ) #

Constructor. Createas a ControlsGamepad with the specified number.

Arguments

  • int num - Game pad number.

int getNumber ( ) const#

Returns the game pad number (up to four game pads are supported).

Return value

Game pad number.

bool isAvailable ( ) const#

Checks if the game pad is available.

Return value

true if the game pad is available; otherwise, false.

const char * getName ( ) const#

Returns the name of the game pad.

Return value

User-friendly game pad name.

int getPlayerIndex ( ) const#

Returns the index of player for the game pad. Some devices support connection of multiple players (e.g., XBox 360 supports up to four players connected through XBox 360 game pads). This method enables you to get this index.

Return value

Player index for the game pad.

int getDeviceType ( ) const#

Returns a value indicating the type of the device (wheel, throttle, etc.).

Return value

Device type. One of the ControlsJoystick::DEVICE_TYPE_* values.

int getModelType ( ) const#

Returns a value indicating the game pad model type.

Return value

Game pad model type identifier.

void setFilter ( float filter ) #

Sets a filter value used to correct the current state of the game pad 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 game pad 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.

int updateEvents ( ) #

Scans the game pad controls (synchronizes game pad button states with the controller itself). Should be called each frame.
Notice
On Windows, in case a game pad 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 game pad is not found or updateEvents() already has been called for the frame; otherwise 1.

float getLeftTrigger ( ) const#

Returns an axis state value (the position) of the left trigger. Zero means the trigger is not pressed; 1 means the trigger is pressed to the maximum.

Return value

Value in range [0; 1].

float getLeftX ( ) const#

Returns a state value of the left thumbstick along the X-axis. When a thumbstick is in the center position, this value is zero. Negative values indicate left; positive values indicate right.

Return value

Value in range [-1; 1].

float getLeftY ( ) const#

Returns a state value of the left thumbstick along the Y-axis. When a thumbstick is in the center position, this value is zero. Negative values indicate down; positive values indicate up.

Return value

Value in range [-1; 1].

float getRightTrigger ( ) const#

Returns an axis state value (the position) of the right trigger. Zero means the trigger is not pressed; 1 means the trigger is pressed to the maximum.

Return value

Value in range [0; 1].

float getRightX ( ) const#

Returns a state value of the right thumbstick along the X-axis. When a thumbstick is in the center position, this value is zero. Negative values indicate left; positive values indicate right.

Return value

Value in range [-1; 1].

float getRightY ( ) const#

Returns a state value of the right thumbstick along the Y-axis. When a thumbstick is in the center position, this value is zero. Negative values indicate down; positive values indicate up.

Return value

Value in range [-1; 1].

void setVibration ( float low_frequency, float high_frequency, float duration_ms = 100.0f ) #

Sets the amount of vibration for the right (high-frequency) and left (low-frequency) motors for the time period specified in milliseconds.

Arguments

  • float low_frequency - Vibration value in the [0.0f; 1.0f] range for the left (low-frequency) motor.
  • float high_frequency - Vibration value in the [0.0f; 1.0f] range for the right (high-frequency) motor.
  • float duration_ms - Vibration period duration, in milliseconds.

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.

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.

void setStateButton ( int state, int button ) #

Sets a game pad 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

Return value

Button that switches the given state.

String getStateName ( int state ) const#

Returns the name of a given state, that was assigned to one of controls.

Arguments

Return value

State name.

bool saveState ( const Ptr<Stream> & stream ) const#

Saves ControlsGamepad settings into the stream.

Example using saveState() and restoreState() methods:

Source code (C++)
// initialize a node and set its state
ControlsGamepadPtr gamepad = ControlsGamepad::create(1);
gamepad->setStateButton(0,1);

// save state
BlobPtr blob_state = Blob::create();
gamepad->saveState(blob_state);

// change state
gamepad->setStateButton(2,1);

// restore state
blob_state->seekSet(0);				// returning the carriage to the start of the blob
gamepad->restoreState(blob_state);

Arguments

  • const Ptr<Stream> & stream - Stream smart pointer.

Return value

true if the ControlsGamepad settings are saved successfully; otherwise, false.

bool restoreState ( const Ptr<Stream> & stream ) #

Restores ControlsGamepad settings from the stream.

Example using saveState() and restoreState() methods:

Source code (C++)
// initialize a node and set its state
ControlsGamepadPtr gamepad = ControlsGamepad::create(1);
gamepad->setStateButton(0,1);

// save state
BlobPtr blob_state = Blob::create();
gamepad->saveState(blob_state);

// change state
gamepad->setStateButton(2,1);

// restore state
blob_state->seekSet(0);				// returning the carriage to the start of the blob
gamepad->restoreState(blob_state);

Arguments

  • const Ptr<Stream> & stream - Stream smart pointer.

Return value

true if the ControlsGamepad settings are restored successfully; otherwise, false.

void getStateEvent ( int state ) #

Lets the user assign a game pad 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 game pad button is successfully assigned to a state.

Return value

1 if a button is already assigned; otherwise, 0.
Last update: 2022-04-21
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