Rebinding DirectInput Joystick Keys for Game Input

Rebinding Direct Input Joystick Keys for Game Input

Have you ever wanted to play a game that uses a joystick or gamepad for input, but found that the default key mappings don't suit your needs? Or perhaps you want to customize the input so that pressing a certain button performs a different action in the game? In this article, we will explore how to rebind direct input joystick keys for game input, using the example of changing the function of the Joy6 button to increase the system volume instead of fast-forwarding text.

Understanding Direct Input

Direct Input is a Windows API for handling input from joysticks, gamepads, and other game controllers. It allows developers to access the raw data from these devices and map it to specific actions in their games. However, not all games support custom key bindings for joysticks, which can be frustrating for players who want to use their controllers in a more personalized way.

Finding the Joystick Key Mappings

The first step in rebinding direct input joystick keys is to find the current key mappings for your controller. This can be done using a tool like Joystick Listener, which displays the raw data from your joystick and allows you to see which buttons correspond to which keys.

// Example code for reading joystick input using Direct Input

#include 

// ...

// Initialize Direct Input device
LPDIRECTINPUTDEVICE8 pJoystick = NULL;
if (FAILED(DirectInput8Create(hInstance, DIRECTINPUT_VERSION, IID_IDirectInputDevice8, (void **)&pJoystick, NULL)))
{
    // Handle error
}

// Set data format for joystick
DIPROPDWORD dipdw;
dipdw.diph.dwSize = sizeof(DIPROPDWORD);
dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);
dipdw.diph.dwObj = 0;
dipdw.diph.dwHow = DIPH_DEVICE;
dipdw.dwData = DID_RETURNTYPE_DIPROPRANGE;
if (FAILED(pJoystick->SetProperty(DIPROP_BUFFERSIZE, &dipdw.diph)))
{
    // Handle error
}

// Get joystick state
DIJOYSTATE js;
if (FAILED(pJoystick->GetDeviceState(sizeof(DIJOYSTATE), &js)))
{
    // Handle error
}

// Check joystick button state
if (js.rgbButtons[6] & 0x80)
{
    // Joy6 button is pressed
}


Rebinding the Joystick Keys

Once you have identified the key mapping for Joy6, you can modify the code to change its function. For example, to increase the system volume instead of fast-forwarding text, you can use the waveOutSetVolume function to adjust the master volume level.

// Example code for rebinding Joy6 button to increase system volume

#include <dinput.h>
#include <mmsystem.h>

// ...

// Initialize Direct Input device
LPDIRECTINPUTDEVICE8 pJoystick = NULL;
if (FAILED(DirectInput8Create(hInstance, DIRECTINPUT_VERSION, IID_IDirectInputDevice8, (void **)&pJoystick, NULL)))
{
    // Handle error
}

// Set data format for joystick
DIPROPDWORD dipdw;
dipdw.diph.dwSize = sizeof(DIPROPDWORD);
dipdw.diph.dwHeaderSize = sizeof(DIPROPHEADER);
dipdw.diph.dwObj = 0;
dipdw.diph.dwHow = DIPH_DEVICE;
dipdw.dwData = DID_RETURNTYPE_DIPROPRANGE;
if (FAILED(pJoystick->SetProperty(DIPROP_BUFFERSIZE, &dipdw.diph)))
{
    // Handle error
}

// Get joystick state
DIJOYSTATE js;
if (FAILED(pJoystick->GetDeviceState(sizeof(DIJOYSTATE), &js)))
{
    // Handle error
}

// Check joystick button state
if (js.rgbButtons[6] & 0x80)
{
    // Joy6 button is pressed
    // Increase system volume
    waveOutSetVolume(0, MIXER_VOLUME_UP);
}




Rebinding direct input joystick keys for game input can be a powerful way to customize your gaming experience. By understanding how Direct Input works and modifying the code to change the key mappings, you can create a more personalized and comfortable playing experience. In this article, we have explored how to find the current key mappings for your joystick and how to rebind the Joy6 button to increase the system volume instead of fast-forwarding text. With these techniques, you can take control of your gaming input and make it work for you.

References


DirectInput - Microsoft Docs
Joystick Listener - Antibody Interactive
waveOutSetVolume - Microsoft Docs